METRAHIT T-COM€¦ · METRAHIT⏐T-COMCable Multimeter for Measurements in Symmetrical Copper Cable Networks Operating Instructions 3-349-381-03 6/7.15

METRAHIT⏐T-COMCable Multimeter for Measurements in Symmetrical Copper Cable Networks

Operating Instructions

3-349-381-036/7.15

2 GMC-I Messtechnik GmbH

Standard Equipment Contact Persons

Standard Equipment1 cable multimeter1 protective rubber cover1 F836 ever-ready case1 KS21T cable set (600 V CAT I I I) consisting of:

one 2-conductor measurement cable (yellow/blue), 2 meters long, with test probes, 1 earth terminal cable (black), 2 meters long, with test probe

1 condensed operating instructions, English/German1 CD ROM (contents: amongst other topics operating instruc-

tions and data sheet)1 DAkkS calibration certificate with calibration report2 batteries, 1.5 V, type AA, installed

GMC-I Messtechnik GmbH 3

Contact Persons

Accessories (sensors, plug inserts, adapters, consumable materials)The accessories available for your instrument are checked for compliance with currently valid safety regulations at regular intervals, and are amended as required for new applications. Currently up-to-date accessories which are suitable for your mea-suring instrument are listed at the following web address along with photo, order number, description and, depending upon the scope of the respective accessory, data sheet and operating instructions: www.gossenmetrawatt.com

See also chapter 10 on page 66.

Product SupportTechnical Queries (use, operation, software registration)If required please contact:

GMC-I Messtechnik GmbHProduct Support HotlinePhone: +49 911 8602-0Fax: +49 911 8602-709e-mail [email protected]

Software Enabling for METRAwin 10GMC-I Messtechnik GmbHFront OfficePhone: +49 911 8602-111Fax: +49 911 8602-777e-mail: [email protected]

TrainingTraining in Nuremberg, on-site training at customer facilities (scheduling, prices, registration, travel, accommodation)If required please contact:

GMC-I Messtechnik GmbHTraining DivisionPhone: +49 911 8602-935Fax: +49 911 8602-724e-mail: [email protected]


Standard Equipment Contact Persons

Recalibration ServiceWe calibrate and recalibrate all instruments supplied by GMC-I Messtechnik GmbH, as well as other manufacturers, at our ser-vice center, for example after one year within the framework of your test equipment monitoring program, as well as prior to use etc. and offer you test equipment management free of charge.

Repair and Replacement Parts ServiceDAkkS Calibration Laboratory* and Rental Instrument ServiceIf required please contact:

GMC-I Service GmbHService Center Thomas-Mann-Str. 2090471 Nuremberg, GermanyPhone: +49 911 817718-0Fax: +49 911 817718-253E-mail [email protected]

This address is only valid in Germany. Please contact our representatives or subsidiaries for service in other countries.

* DAkkS Calibration Laboratory for Measured Electrical Quantities D-K-15080-01-01 accredited per DIN EN ISO/IEC 17025:2005

Accredited quantities: direct voltage, direct current value, direct current resistance, alternating voltage, alternating current value, AC active power, AC apparent power, DC power, capacitance, frequency, temperature


Contact Persons

Competent PartnerGMC-I Messtechnik GmbH is certified in accordance with DIN EN ISO 9001:2008.Our DAkkS calibration lab is accredited by the Deutscher Kalibri-erdienst (German Calibration Service) in accordance with DIN EN ISO/IEC 17025:2005 under registration number D-K-15080-01-01.We offer a complete range of expertise in the field of metrology: from test reports and factory calibration certificates, right on up to DAkkS calibration certificates.Our spectrum of offerings is rounded out with free test equipment management.As a full service calibration lab, we can calibrate instruments from other manufacturers as well.


Table of Contents

Contents Page Contents Page

1 Safety Features and Precautions ....................................... 81.1 Use for Intended Purpose ................................................................101.2 Meanings of Danger Symbols ..........................................................101.3 Meanings of Acoustic Warning Signals ............................................10

2 Operating Overview – Connections, Keys, Rotary Switch, Symbols .......................................................................... 12

3 Initial Start-Up .................................................................. 163.1 Batteries ........................................................................................163.2 Activation .......................................................................................163.3 Setting the Operating Parameters ....................................................163.4 Switching the Instrument Off ...........................................................17

4 Control Functions ............................................................. 184.1 Selecting Measuring Functions and Measuring Ranges .....................184.1.1 Automatic Range Selection .............................................................184.1.2 Manual Measuring Range Selection .................................................184.1.3 Quick Measurements ......................................................................194.2 Zero Offset / Relative Measurements ...............................................194.3 Display (LCD) .................................................................................204.3.1 Digital Display ................................................................................204.3.2 Analog Display ...............................................................................204.4 Measured Value Storage: DATA (auto-hold / compare) ......................214.4.1 Saving Minimum and Maximum Values – MIN/MAX Function ............224.5 Measurement Data Recording .........................................................23

5 Measurements ................................................................. 265.1 Voltage Measurement ....................................................................265.1.1 Direct and Pulsating Voltage Measurement, V DC and V (DC+AC) .....275.1.2 Alternating Voltage and Frequency Measurement V AC and Hz

with Selectable Low-Pass Filter .......................................................285.1.3 Transient Overvoltages ...................................................................305.1.4 Voltage Measurements at Above 600 V ...........................................305.2 Resistance Measurement, Ω ........................................................315.3 Temperature Measurement – Temp RTD .........................................325.3.1 Measurement with Resistance Thermometers ..................................325.4 “RSL” Loop Impedance Measurement with 2 mA Constant Current ....345.5 Continuity Test ..............................................................................355.6 Diode Testing with 2 mA Constant Current .....................................365.7 Capacitance Measurement ............................................................385.7.1 Cable Length Measurement m ........................................................385.8 Insulation Resistance Measurement:

in Telecommunications Networks – MΩISO Function .......................395.8.1 Connecting the Measurement Cables ..............................................405.8.2 Detection of Interference Voltages ...................................................405.8.3 Performing Insulation Resistance Measurements ..............................405.8.4 Ending the Measurement and Discharging .......................................425.9 Current Measurement ....................................................................435.9.1 Direct and Pulsating Current Measurement, Direct Connection,

A DC and A (DC+AC) ......................................................................445.9.2 Alternating Current and Frequency Measurement,

Direct Connection, A AC and Hz ......................................................455.9.3 Direct and Pulsating Current Measurement

with Clip-On Current Sensor, A DC and A (DC+AC) ..........................465.9.4 Alternating Current Measurement with Clip-On Current Sensor,

A AC and Hz ..................................................................................47


Table of Contents

Contents Page Contents Page

6 Device and Measuring Parameters ................................... 486.1 Paths to the Various Parameters .................................................... 496.2 List of All Parameters .................................................................... 496.3 Querying Parameters – InFo Menu (as moving letters) ...................... 506.4 Entering Parameters – SETUP Menu ............................................... 506.5 Default Settings ............................................................................. 53

7 Interface Operation ........................................................... 547.1 Activating the Interface ................................................................... 547.2 Configuring Interface Parameters .................................................... 55

8 Technical Data ................................................................ 56

9 Maintenance and Calibration ............................................ 629.1 Displays – Error Messages ............................................................ 629.2 Batteries ....................................................................................... 629.3 Fuses ............................................................................................ 639.4 Housing Maintenance .................................................................... 649.5 Return and Environmentally Sound Disposal .................................... 649.6 Recalibration ................................................................................. 659.7 Manufacturer’s Guarantee .............................................................. 65

10 Accessories .......................................................................6610.1 General ......................................................................................... 6610.2 Technical Data for Measurement Cables

(scope of delivery: KS21T safety cable set) ...................................... 6610.3 Power Pack NA⏐X-TRA (not included) .............................................. 6610.4 Interface Accessories (not included) ................................................ 67

11 Index .................................................................................68


Safety Warnings

1 Safety Features and PrecautionsYou have selected an instrument which provides you with a high level of safety.This instrument fulfills the requirements of applicable European and national EC directives. This is confirmed by means of the CE mark. A corresponding declaration of conformity can be requested from GMC-I Messtechnik GmbH.The TRMS digital multimeter has been manufactured and tested in accordance with the following safety regulations: IEC 61010–1:2010 / DIN EN 61010–1:2010 / VDE 0411–1:2011. When used for its intended purpose (see page 10), safety of the operator, as well as that of the instrument, is assured. Their safety is however not guaranteed, if the instrument is used improperly or handled carelessly.In order to maintain flawless technical safety conditions, and to assure safe use, it is imperative that you read the operating instructions thoroughly and carefully before placing your instrument into service, and that you follow all instructions contained therein.

Measuring Categories and their Significance per IEC 61010-1

The measuring category and the maximum rated voltage which are printed on the device apply to your measuring instrument, e.g. 600 V CAT I I .

Observe the following safety precautions:• The multimeter may not be used in potentially explosive

atmospheres.• The multimeter may only be operated by persons who are

capable of recognizing contact hazards and taking the appropriate safety precautions. Contact hazards according to the standards exist anywhere, where voltages of greater than 33 V RMS or 70 V DC may occur. Avoid working alone when taking measurements which involve contact hazards. Be certain that a second person is present.

• Maximum allowable voltage between the voltage measuring sockets or all connector sockets and ground is 600 V for mea-suring category I I, and 300 V for measuring category I I I.

• Be prepared for the occurrence of unexpected voltages at devices under test (e.g. defective devices). For example, capacitors may be dangerously charged.

CAT Definition

I Measurements in electrical circuits which are not directly connected to the mains: e.g. electrical systems in motor vehicles and aircraft, batteries etc.

I I Measurements in electrical circuits which are electrically connected to the low-voltage mains: via plug, e.g. in household, office and laboratory applications

I I I Measurements in building installations: stationary consumers, distributorterminals, devices connected permanently to the distributor


Safety Warnings

• Make certain that the measurement cables are in flawless condition, e.g. no damage to insulation, no interruptions in cables or plugs etc.

• No measurements may be made with this instrument in electrical circuits with corona discharge (high-voltage).

• Special care is required when measurements are made in HF electrical circuits. Dangerous pulsating voltages may be pres-ent.

• Measurements under moist ambient conditions are not permitted.

• Be absolutely certain that the measuring ranges are not overloaded beyond their allowable capacities. Limit values are included in chapter 8; “Technical Data” in the table entitled “Measuring Functions and Measuring Ranges” in the “Overload Capacity” column.

• The multimeter may only be operated with installed batteries or rechargeable batteries. Dangerous currents and voltages are otherwise not indicated, and the instrument may be damaged.

• The instrument may not be operated if the fuse cover or the battery compartment lid has been removed, or if its housing is open.

• The input for the current measuring range is equipped with a fuse link. Maximum permissible voltage for the measuring circuit (= rated voltage of the fuse) is 600 V AC/DC.Use specified fuses only (see page 60)! The fuse must have a breaking capacity of at least 10 kA.

Opening of Equipment / RepairThe equipment may be opened only by authorized service per-sonnel to ensure the safe and correct operation of the equipment and to keep the warranty valid.Even original spare parts may be installed only by authorized ser-vice personnel.In case the equipment was opened by unauthorized personnel, no warranty regarding personal safety, measurement accuracy, conformity with applicable safety measures or any consequential damage is granted by the manufacturer.

Repair and Parts ReplacementWhen the instrument is opened, voltage conducting parts may be exposed. The instrument must be disconnected from the measuring circuit before the performance of repairs or the replacement of parts. If repair of a live open instrument is required, it may only be carried out by trained personnel who are familiar with the dangers involved.

Defects and Extraordinary StrainsIf it may be assumed that the instrument can no longer be operated safely, it must be removed from service and secured against unintentional use.Safe operation can no longer be relied upon:• If the device demonstrates visible damage,• If the instrument no longer functions, or if malfunctioning

occurs,• After long periods of storage under unfavorable conditions,

e.g. humidity, dust or extreme temperature (see “Ambient Con-ditions” on page 59).


Safety Warnings

1.1 Use for Intended Purpose• The respective multimeter is a portable device which can be

held in the hand during the performance of measurements.• Only those types of measurements described in chapter 5 may

be performed with the measuring instrument.• The measuring instrument, including measurement cables and

plug-on test probes, may only be utilized within the specified measuring category (see page 60 and the table on page 8 regarding significance).

• Overload limits may not be exceeded. See technical data on page 56 for overload values and overload limits.

• Measurements may only be performed under the specified ambient conditions. See page 59 regarding operating temperature range and relative humidity.

• The measuring instrument may only be used in accordance with the specified degree of protection (IP code) (see page 61).

1.2 Meanings of Danger Symbols

Warning concerning a point of danger (attention: observe documentation!)

Warning concerning dangerous voltage at the measurement input: U > 15 V AC or U > 25 V DC

1.3 Meanings of Acoustic Warning Signals

Voltage warning: > 610 V (intermittent acoustic signal)

Current warning: > 1.1 A (continuous acoustic signal)

!


Safety Warnings


Operating Overview – Connections, Keys, Rotary Switch, Symbols

2 Operating Overview – Connections, Keys, Rotary Switch, Symbols 1 Display (LCD) (see page 13 for significance of symbols)2 MAN / AUTO shift key for manual/automatic measuring range selection Increase parameter values

“Operating Mode” menu: Selection of individual menu entries againstthe direction of flow

3 ON / OFF | LIGHT key for switching device and display illumination on and off4 FUNC | ENTER multifunction key

“Operating Mode” menu: Acknowledge entry (ENTER)UISO ON / OFF Insulation resistance measurementKey for switching insulation resistance measurement on and off

5 Increase measuring range or move decimal point to the right (MAN function)6 Rotary switch for measuring functions (see page 14 for significance of symbols)7 DAkkS calibration mark8 Connector socket for ground / connected to ground9 Connector socket for current measurement with automatic blocking

10 Connector socket for voltage, resistance, temperature, diode and capacitance measurement with automatic blocking

11 DATA / MIN / MAX Key for freezing, comparing, deleting the measured value, and for Min/Max function Decrease values

“Operating Mode” menu: Select individual menu entries in flow direction12 MEASURE | SETUP Key for switching between measuring and menu functions13 ZERO | ESC

Key for zero balancing “Operating Mode” menu: Exit menu level and return to a higher level, exit

parameters entry function without savingPOL / UISO: Insulation resistance measurement

Press and hold key to reverse the polarity of the cableunder test (prerequisite: rotary switch set to MΩ ISO).

14 Decrease measuring range or move decimal point to the left (MAN function)15 Power pack connector jack16 Infrared interface

Chap. 3 ←

Chap. 6←

1

3

4

16

5

6

9

→ Chap. 4.3

→ Chap. 3

→ Chap. 5

→ Chap. 7

→ Chap. 6

→ Chap. 3 ff.

→ Chap. 3

13

12

→ Chap. 4.110

2 → Chap. 4.1.214

8

Max. 600 V!

11

15

Chap. 4.1 ←

Chap. 4.4 ←

Chap. 6 ←

Chap. 3.1 ←

7 → Chap. 1.2



Symbols used in the Digital Display 1 Battery level indicator2 ON: continuous operation (automatic shutdown deactivated)3 MAN: manual measuring range selection active4 Digital display with decimal point and polarity display5 max/min: Min/Max value storage6 DATA: display memory, “freeze measured value”7 STORE: memory mode active8 ISO: insulation resistance measurement active / selected test voltage9 1: x current clip factor (transformation ratio)

10 IR: infrared interface display11 Scale for analog display12 Pointer for analog display (bar graph – pointer)

depending upon setting in SETUP menu for the A.d iSP parameter triangle appears: indicates overranging

13 RSL: loop impedance measurement selected14 Diode measurement selected15 Selected type of current16 TRMS measurement17 Pt100(0): selected platinum resistance thermometer with

automatic recognition of Pt100/Pt100018 No function19 sec (seconds): unit of time20 ΔREL: relative measurement with reference to offset21 Unit of measure22 ZERO: zero balancing active23 Warning regarding dangerous voltage: U > 15 V AC or U > 25 V DC24 Continuity test with acoustic signal active25 h (hours): unit of time

1 2 9 10

12

15

15

1617

21 18

23

24

765

2022

83

12

19

25

4

Battery full

Battery OK

Battery weak

Battery (almost) dead, U < 1.8 V

Data transmission ↓ to / ↑ from the multimeter is active

IR interface in standby mode(ready to receive starting commands)

Battery level indicator

Interface indicator

14



Symbols used for Rotary Switch ositions Switch FUNC Display Measuring FunctionV~ 0/4 V~ AC TRMS Alternating voltage, AC TRMS, full bandwidthHz (V) 1 Hz ~ AC Voltage frequency, full bandwidthV~ 2 V Fil ~ AC TRMS Alternating voltage, AC TRMS, with low pass filter (200 Hz)Hz (V) 3 Hz Fil ~ AC Voltage frequency, with low pass filter (200 Hz)V 0/2 V DC Direct voltageV 1 V DC AC TRMS Pulsating voltage, TRMS ( )RSL 0/3 RPE Ω Loop impedance measurement with acoustic signal where I is constant

1 Ω Continuity test with acoustic signal

2 V DC Diode voltage where I is constant

Ω 0/2 Ω (DC) resistanceTemp. RTD 1 °C Pt 100/1000 Temperature with Pt 100 / Pt 1000 resistance thermometer

0/2 nF Capacitancem (km) 1 m (km) Cable length (via capacitive linear electric constant)a-b, a-E, b-E 0/2 V Extraneous voltage testMΩISO@100V 1 ISO 100 V / kΩ / MΩ Insulation resistance measurement:A 0/2 A DC Direct current valueA 1 A DC AC TRMS Pulsating current amperage, AC DC TRMSA~ 0/2 A~ AC TRMS Alternating current amperage, AC TRMSHz (A) 1 Hz ~ AC Current frequency

0/2 A DC DC amperage with AC DC clip-on current sensor, 1 V:1/10/100/1000 A

1 A DC AC TRMS Pulsating current amperage, TRMS, with AC DC clip-on current sensor, see above

0/2 A~ AC TRMS Alternating current amperage, TRMS, with clip-on current sensor, see above

Hz ( ) 1 Hz ~ AC Current frequency with clip-on current sensor, see above

200 Hz

200 Hz

VACDC VAC2

VDC2

+=

A

A

A

A



User Interface Symbols in the Following Chapters

... Scroll through main menu

... Scroll through submenu

Select decimal point

Increase/decrease value

time Submenu/parameter (7-segment font)

1nFo Main menu (7-segment font, boldface)

Symbols on the Device

Warning concerning a point of danger (attention: observe documentation!)

Ground

CAT I I / I I I Measuring category I I or I I I device, see also “Measuring Categories and their Significance per IEC 61010-1” on page 8.

Continuous, doubled or reinforced insulation

Indicates EC conformity

s IR t Position of the infrared interface, window on the top of the instrument

Position of the power pack adapter socket, see also chapter 3.1.

Fuse for current measuring ranges (see chapter 9.3)

The device may not be disposed of with the trash. Further information regarding the WEEE mark can be accessed on the Internet at www.gossenmetrawatt.com under the search term WEEE (see also chapter 9.5).

Calibration seal (blue seal):

See also “Recalibration” on page 65.

!

5 V / 600 mA

Serial number

Registration numberDate of calibraion (year – month)

German Accrediation Body GmbH – Calibration labXY123

2012-08

D-K-15080-01-01


Initial Start-Up – Setup

3 Initial Start-Up

3.1 BatteriesBe certain to refer to chapter 9.2 regarding correct battery installation!Momentary battery voltage can be queried in the “Info” menu (see chapter 6.3).

Attention!!Disconnect the instrument from the measuring circuit before open-ing the battery compartment lid in order to replace the batteries.

Operation with Power Pack (not included, see chapter 10.3)Installed batteries are disconnected electronically if the NA⏐X-TRA power pack is used, and need not be removed from the instrument. If rechargeable batteries are used, they must be recharged externally.If the external power supply is switched off, the device is switched to battery operation without interruption.

3.2 Activation

Switching the Instrument On Manually

Ð Press the ON / OFF | LIGHT key until the display appears. Power-up is acknowledged with a brief acoustic signal. As long as the key is held depressed, all of the segments at the liquid crystal display (LCD) are illuminated. The LCD is depicted on page 13. The instrument is ready for use as soon as the key is released.

Display IlluminationAfter the instrument has been switched on, background illumina-tion can be activated by briefly pressing the ON / OFF | LIGHT key. Il-lumination is switched back off by once again pressing the same key, or automatically after approximately 1 minute.

Switching the Instrument On with a PCThe multimeter is switched on after transmission of a data block from the PC, assuming the “irStb” parameter has been set to “ir on” (see chapter 6.4).However, we recommend using the power saving mode: “ir off”.

NoteElectrical discharge and high frequency interference may cause incorrect displays to appear, and may disable the measuring sequence. Disconnect the device from the measuring circuit. Switch the instrument off and back on again in order to reset. If the problem persists, briefly dislodge the battery from the connector contacts (see also chapter 9.2).

3.3 Setting the Operating Parameters

Setting Time and DateSee “t iME” and “dAtE” parameters in chapter 6.4.

Display Modes for the Analog DisplaySelection can be made from two different display modes (see “A.d iSP” parameter in chapter 6.4).

Display Modes for the Digital DisplaySelection can be made from two different display modes (see “0.d iSP” parameter in chapter 6.4).


Initial Start-Up – Setup

3.4 Switching the Instrument Off

Switching the Instrument Off Manually

Ð Press the ON / OFF | LIGHT key until 0FF appears at the display.

Shutdown is acknowledged with a brief acoustic signal.

Automatic ShutdownThe instrument is switched off automatically if the measured value remains unchanged for a long period of time (maximum measured value fluctuation of approximately 0.8% of the measuring range per minute or 1° C or 1° F per minute), and if none of the keys or the rotary switch have been activated before a selected period of time in minutes has elapsed (see “APoFF” parameter on page 49). Shutdown is acknowledged with a brief acoustic signal.Exceptions include: Transmission and memory mode operation, continuous operation and whenever a dangerous voltage is applied to the input (U > 15 V AC or U > 25 V DC).

Disabling Automatic ShutdownThe instrument can be set to continuous operation.

Ð Simultaneously press the

and keys to this end.

The “Continuous On” function is indicated at by means of the ON display to the right of the battery symbol. The “Continuous On” setting can only be cancelled by changing the respective parameter, and not by switching the instrument off (see “APoFF” on page 51).

ON / OFFLIGHT

FUNCENTER

ON / OFFLIGHT

Auto-Range

8.8.8.8

Illumination On

00.00ON / OFF

LIGHT

Illumination Off

00.00ON / OFF

LIGHT

0ffON / OFF

LIGHT

long(1 s)


Control Functions

4 Control Functions

4.1 Selecting Measuring Functions and Measuring Ranges

4.1.1 Automatic Range SelectionThe multimeter is equipped with auto-ranging for all measuring functions, except for temperature measurement, and diode and continuity testing. Auto-ranging is active as soon as the instrument is switched on. The instrument automatically selects the measuring range which allows for highest possible resolution of the applied quantity. When the instrument is switched to frequency measurement, the previously selected voltage measuring range remains active.

AUTO-Range FunctionThe multimeter is switched automatically to the next higher range at ±(3099 d + 1 d → 0310 d), and to the next lower range at ±(280 d - 1 d → 2799 d).

4.1.2 Manual Measuring Range SelectionAuto-ranging can be deactivated and measuring ranges can be selected manually in accordance with the following table by pressing the MAN / AUTO button.The desired measuring range can then be selected with the or key.The instrument is automatically returned to range selection when the MAN / AUTO key is pressed, the rotary switch is activated or the instrument is switched off and back on again.

Overview: Auto-Ranging and Manual Range Selection

* Via manual measuring range selection only

The multimeter is held in the selected measuring range. If the range limit is exceeded, 0L appears at the display. You should then switch to the next higher measuring range with the help of the key. Measurement type MΩISO: If the measured value is less than 10% of the measuring range after manual measuring range selection, u r (under range) appears at the display. You should then select the next smaller measuring range with the help of the key.

Function Display

MAN / AUTO Manual mode active: utilized measuring range is fixed MAN

or

Range switching sequence for: V: 300 mV* ↔ 3 V ↔ 30 V ↔ 300 V ↔ 600 V Hz: 300 Hz ↔ 3 kHz ↔ 30 kHz ↔ 300 kHz (Hz(U))Ω: 300 Ω ↔ 3 kΩ ↔ 30 kΩ ↔ 300 kΩ ↔ 3 MΩ ↔ 30 MΩA: 300 μA ↔ 3 mA ↔ 30 mA ↔ 300 mA ↔ 1 AA : See chapter 5.9.3 und chapter 5.9.4F: 30 nF ↔ 300 nF ↔ 3 μF ↔ 30 μF ↔ 300 μFMΩISO: 300 kΩ ↔ 3 MΩ ↔ 30 MΩ ↔ 300 MΩ

MAN

MAN / AUTO Return to automatic measuring range selection —


Control Functions

4.1.3 Quick MeasurementsMeasurements performed using a suitable fixed measuring range are executed more quickly than those which utilize automatic range selection. Quick measurement is made possible with the following two functions:• Manual measuring range selection, i.e. selection of the measuring

range with the best resolution (see chapter 4.1.2)or• With the DATA function (see chapter 4.4). In this way, the

appropriate measuring range is selected automatically after the first measurement and the second measurement is executed more quickly.

The selected measuring range remains active for the subsequent series of measurements with these two functions.

4.2 Zero Offset / Relative MeasurementsZero balancing or a reference value for relative measurements can be stored to memory depending upon deviation from the zero point:

The relevant reference or correction value is deducted individually for the respective measuring function as an offset from all future measurements and remains in memory until deleted, or until the multimeter is switched off.

Zero balancing and reference value adjustment can be used for auto-ranging, as well as for manual measuring range selection.

Zero Balancing

Ð Plug the measuring cables into the instrument and connect the free ends to each other, except for capacitance measurement in which case the ends of the cables are not connected to each other.

Ð Briefly press the ZERO | ESC key. The instrument acknowledges zero balancing with an acoustic signal, and the “ZERO ΔREL” symbol appears at the LCD. The value measured at the moment the key is pressed serves as a reference value.

Ð Zero balancing can be cleared by once again pressing the ZERO | ESC key.

NoteAs a result of TRMS measurement, the multimeter displays a residual value of 1 to 10/35 digits with short-circuited measurement cables as the zero point for V AC / I AC or V(AC+DC) / I (AC+DC) measurements (non-linearity of the TRMS converter). This has no influence on specified accuracy above 1% of the measuring range (or 10% in the mV ranges).

Setting the Reference Value

Ð Plug the measuring cables into the instrument and measure a reference value (max. 1500 digits).

Deviation from zero – with short-circuited measurement cables for V, Ω, A– with open input for capacitance unit of measure: F

Display

0 to 200 digits ZERO ΔREL> 200 to 1500 digits ΔREL


Control Functions

Ð Briefly press the ZERO | ESC key. The instrument acknowledges storage of the reference value with an acoustic signal, and the “ZERO ΔREL” or the “ΔREL” symbol appears at the LCD. The value measured at the moment the key is pressed serves as a reference value.

Ð The reference value can be cleared by once again pressing the ZERO | ESC key.

Notes Regarding Relative Measurement• Relative measurement effects the digital display only. The

analog display continues to read out the original measured value.• In the case of relative measurement, Ω F or AC quantities may

also appear as negative values.

4.3 Display (LCD)

4.3.1 Digital Display

Measured Value, Unit of Measure, Type of Current, PolarityThe measured value with decimal and plus or minus sign appears at the digital display. The selected unit of measure and current type are displayed as well. A minus sign appears to the left of the value during the measurement of zero-frequency quantities, if the plus pole of the measured quantity is applied to the “⊥” input.The “0.d iSP” parameter can be used to determine whether lead-ing zeros will be appear or be suppressed at the measured value display (see chapter 6.4).

OverrangingIf the upper range limit of 3100 digits is exceeded “0L” (overload) appears at the display.Exceptions: “0L” appears at the display as of 610.0 V in the case of voltage measurement in the 600 V range, as of 5100 digits for diode testing, and as of 1100 digits in the 1 A range.

4.3.2 Analog Display

Measured Value, PolarityThe analog display demonstrates the dynamic performance of a moving-coil mechanism. This display is especially advantageous for observing measured value fluctuation, and for balancing procedures.Two different display modes can be selected in the “SETUP” menu with the help of the “A.d iSP” parameter (see chapter 6.4):• Bar graph• Pointer: the current measured value is tracked in real-timeThe analog scale displays a negative range of 5 scale divisions for the measurement of zero-frequency quantities, allowing for precise observation of measured value fluctuation around zero. If the measured value exceeds the negative range of 5 scale divisions, polarity is reversed at the analog display. Scaling of the analog scale is automatic. This is very helpful for manual measuring range selection.

OverrangingOverranging in the positive range is displayed by means of the right triangle symbol.

Refresh RateIn the bar graph and pointer modes, the analog display is refreshed 40 times per second.


Control Functions

4.4 Measured Value Storage: DATA (auto-hold / compare)An individual measured value can be automatically “frozen” with the DATA function (auto-hold). This is useful, for example, when contacting the measuring points with the test probes requires your full attention. After the measuring signal has been applied and the measured value has settled in in accordance with the “condition” listed in the table below, the measured value is frozen at the digital display and an acoustic signal is generated. The test probes can now be removed from the measuring points, and the measured value can be read from the digital display. If the measuring signal falls below the value specified in the table, the function is reactivated for storage of the next value.

Measured Value Comparison (DATA Compare)If the currently frozen value deviates from the first saved value by less than 100 digits, the acoustic signal is generated twice. If deviation is greater than 100 digits, only one brief acoustic signal is generated.

NoteThe DATA function has no effect on the analog display, at which the current measured value continues to appear. However, when the digital display is “frozen”, the decimal point is fixed as well (fixed measuring range, symbol: MAN). The selected measuring range should not be manually changed as long as the DATA function is active.

The DATA function is deactivated by pressing and holding the DATA/MIN/MAX key (approx. 1 second), when the measuring function is changed or when the instrument is switched off and back on again.

1) Reactivation results from falling short of specified measured value limits.2) Two acoustic signals are generated the first time a measured value is saved as

a reference value. For subsequent data hold, two acoustic signals are only generated if the currently frozen value deviates from the first saved value by less than 100 digits.

Key: MV = measured value, R = measuring range

DATAFunction

Press DATA /

Min/Max

Condition Response from Instrument

Measuring Function

Measuring Signal

DisplayAcou-sticMV

Digital DATA

Activate Brief Blinks Once

Save(stabilized measured

value)

V, A, F, Hz, %

> 10% of R Is dis-

played StaticOnce

Twice 2)Ω ≠ 0L

Reactivate 1)

V, A, F, Hz, %

< 10% of R Stored

MV BlinksΩ = 0L

Change toMin/Max brief See table in chapter 4.4.1

Exit long Is cleared Is cleared Twice

V, A, Hz

t [s]

100%

10%

ActivatedReactivatedSave Save

3000 digitsof Measuring RangeF, %


Control Functions

ExampleThe voltage measuring range is set manually to 30 V. The first measured value is 5 V and is stored to memory because it is greater than 10% of the measuring range (= 3 V), and is thus reliable above the background noise level. As soon as the measured values drops to less than 10% of the measuring range, i.e. amounts to less than 3 V which corresponds to removal of the test probes from the measuring point, the instrument is ready to store a new value.

4.4.1 Saving Minimum and Maximum Values – MIN/MAX FunctionMinimum and maximum measured values applied to the measuring instrument’s input after the Min/Max function has been activated can be “frozen” at the display. The most important use of this function is the determination of minimum and maximum values during long-term measured value observation.The Min/Max function can be activated in all measuring functions.The Min/Max function has no effect on the analog display, at which the current measured value continues to appear.Apply the measured quantity to the instrument and set the measuring range with the MAN / AUTO key before activating the Min/Max function.The Min/Max function is deactivated by pressing and holding the DATA/MIN/MAX key (approx. 1 second), when the measuring function is changed or when the instrument is switched off and back on again.

NoteAs opposed to the DATA function, the Min/Max function can also be used for temperature measurement.

FunctionMin/Max

Press DATA /

Min/MaxMin. and Max.

Measured Values

Response from InstrumentDisplay Aco

us-tic

Sig-nal

Measured Value Digital

Max.Min.

1Activate and save

2 x brief Aresaved

Current measured

value

Max and min

Twice

2Save and display

Brief Storage continues in background,

new min. and max. values are displayed.

Saved min. value Min. Once

Brief Saved max. value Max. Once

3 Return to

1Brief Same as 1,stored values are not deleted Same as 1

Same as 1 Once

Stop Long Are deletedCurrent

measured value

Is deleted Twice


Control Functions

4.5 Measurement Data RecordingThe cable multimeter is capable of recording measurement data using an adjustable sampling rate for long periods of time in the form of measurement series. Data are stored to a battery-backed memory module, and are retained even after the multimeter is switched off. The system acquires measured values relative to real-time.Stored measured values can subsequently be read out with the help of METRA⏐VIEW software. The only prerequisite is a PC which is connected by means of an interface cable to the USB⏐X-TRA bidirectional interface adapter, which is plugged onto a cable multimeter. See also chapter 7, “Interface Operation”.

Memory Parameters Overview

The STORE Menu Function

Ð First set the sampling rate for memory mode operation (see chapter 6.4 the rAtE parameter) , and then start memory mode operation.

Ð First select the desired measuring function and an appropriate measuring range.

Ð Check the battery charge level before starting long-term measurement recordings (see chapter 6.3).Connect the NA⏐X-TRA power pack if required.

Starting Recording via Menu Functions

Ð Switch to the “SETUP” mode by pressing MEASURE | SETUP, and select the “StorE” menu.

1nFo ... StorE 000.0 % StArt

Ð Memory mode operation is started by activating FUNC | ENTER. STORE appears underneath the analog display and indicates that the memory mode has been activated. “StoP” appears at the digital display.

Ð Press MEASURE | SETUP in order to return to the measuring function.

Parameter Page: Header

CLEAr 24: Clear Memory

EMpty 24: Clear Memory – appears after CLEAr

0CCUP 24: Querying Memory Occupancy

rAtE 51: rAtE – set the sampling rate

StArt 23: Starting Recording via Menu Functions

StoP 24: Ending Recording

MEASURESETUP

FUNCENTER

FUNCENTER


Control Functions

During RecordingSTORE is displayed underneath the analog display during memory mode operation, and memory occupancy can be monitored:

StoP 000.3%

The following message appears as soon as memory is full: “100.0%”.In order to be able to observe measured values during recording, switch to the measuring function by pressing MEASURE | SETUP. The display is returned to the memory menu after once again pressing MEASURE | SETUP.A new memory block is created when another measuring function is selected with the rotary switch or the FUNC | ENTER key. Data storage then continues automatically.

Ending Recording

Ð “StoP” appears at the display after pressing MEASURE | SETUP.

StoP start

Ð Acknowledge the “StoP” display by pressing FUNC | ENTER. STORE is cleared from the display indicating that recording has been ended.

Ð Press MEASURE | SETUP in order to return to the measuring function.

Ð Memory mode operation can also be exited by switching the multimeter off.

Querying Memory OccupancyMemory occupancy can be queried during recording with the help of the “1nFo” menu (see also chapter 6.3).Memory occupancy range: 000.1% to 099.9%.

1nFo bAtt: ... 0CCUP %: 017.4 %

Memory occupancy can be queried before recording is started via the “StorE” menu.


Clear MemoryThis function deletes all measured values from memory!This function cannot be executed during memory mode operation.


CLEAr empty

FUNCENTER

MEASURESETUP

FUNCENTER

MEASURESETUP

FUNCENTER

MEASURESETUP

FUNCENTER

FUNCENTER


Control Functions


Measurements: V/Hz – RSL – Ω – – Temp – – m – MΩISO – A/Hz

5 Measurements

5.1 Voltage Measurement

Notes Regarding Voltage Measurement• The multimeter may only be operated with the batteries installed.

Dangerous voltages are otherwise not indicated, and the instrument may be damaged.

• The multimeter may only be operated by persons who are capable of recognizing contact hazards and taking the appropriate safety precautions. Contact hazards existanywhere, where voltages of greater than 33 V RMS may occur.The test probes may only be only gripped up to the finger guard. Do not touch the metallic test probes under any circumstances.

• Avoid working alone when taking measurements which involve contact hazards. Be certain that a second person is present.

• Maximum allowable voltage between terminals 9 or 10 and ground (8) is 600 V for measuring category I I, and 300 V for measuring category I I I.

• Be prepared for the occurrence of unexpected voltages at devices under test (e.g. defective devices). For example, capacitors may be dangerously charged.

• No measurements may be made with this instrument in electrical circuits with corona discharge (high-voltage).

• Special care is required when measurements are made in HF electrical circuits. Dangerous pulsating voltages may be pres-ent.

• Be aware of the fact that dangerous voltage spikes are not displayed during measurement with the low-pass filter.We recommend measuring voltage without the low-pass filter first, in order to be able to detect any dangerous voltages.

• Be absolutely certain that the measuring ranges are not overloaded beyond their allowable capacities. Limit values are included in chapter 8, “Technical Data”, in the table entitled “Measuring Functions and Measuring Ranges” in the “Over-load Capacity” column.

• Measurement of voltage of 150 V and greater may only be performed with the KS17-2 cable set. Only this cable set is suitable for measuring category I I / 600 V and higher, I I I / 1000 V and IV / 600 V.



5.1.1 Direct and Pulsating Voltage Measurement, V DC and V (DC+AC)Ð Set the CL iP parameter to 0FF in the current clip setup menu.

Otherwise all measured values are displayed in amperes, and are corrected by the amount resulting from the selected trans-formation ratio for an interconnected clip-on current sensor.

1nFo ... SET rAtE ... CL IP

1 / 10/100/1000 / 0ff

Ð In accordance with the voltage to be measured, turn the rotary switch to V or V .

Ð Connect the measurement cables as shown. The “⊥” connector jack should be grounded.

NoteAn intermittent acoustic signal warns the operator if the measured value exceeds the upper range limit in the 600 V range.

Make sure that a current measuring range (“A”) has not been activated when the multimeter is connected for voltage measurement! If the fuse’s blowing limits are exceeded as a result of operator error, both the operator and the instrument are in danger!With the rotary switch in the V position, the multimeter is always in the 3 V measuring range immediately after it is switched on. As soon a the MAN / AUTO key is pressed, and assuming the measured value is less than 280 mV, the multimeter is switched to the mV measuring range.

MEASURESETUP

FUNCENTER

FUNCENTER

FUNCENTER

COM mA AVTemp

Ωa Eb

– (+)

+ (–)

V= : 100 μV…610 V

020.00V

DC

ACTRMS

020.00V

DC V

V

V

V

> 15 V AC or > 25 V DC:

> 610 V:

Warnings regarding dangerous voltage:

Max. 600 V 1 kHz

V : 10 mV…610 V

Hz: 1 Hz … 300 kHzPmax = 6 x 10

6 V x Hz

Measuring ranges:

230.0

FUNCENTER

MEASURESETUP ... SET ... CL IP

FUNCENTER

FUNCENTER 0ff

5 ranges: 300 mV, 3 V, 30 V,300 V and 600 V



5.1.2 Alternating Voltage and Frequency Measurement V AC and Hz with Selectable Low-Pass Filter

Ð Set the CL iP parameter to 0FF in the current clip setup menu. Otherwise all measured values are displayed in amperes, and are corrected by the amount resulting from the selected trans-formation ratio for an interconnected clip-on current sensor.


1 / 10/100/1000 / 0ff

Ð In accordance with the voltage or frequency to be measured, turn the rotary switch to V~ or Hz.

Ð Connect the measurement cables as shown. The “⊥” connector jack should be grounded.

Voltage Measurement

NoteAn intermittent acoustic signal warns the operator if the measured value exceeds the upper range limit in the 600 V range.

Make sure that a current measuring range (“A”) has not been activated, when the multimeter is connected for voltage measurement! If the fuse’s blowing limits are exceeded as a result of operator error, both the operator and the instrument are in danger!

Ð You can switch back and forth between voltage measurement with and without low-pass filter.

Ð Repeatedly press the FUNC | ENTER multifunction key, until the V or V/Fil unit of measure appears at the display.

Frequency Measurement

Ð Apply the measured quantity is the same way as for voltage measurement.

Ð Manually select the measuring range for the voltage amplitude. When the instrument is switched to frequency measurement, the previously selected voltage measuring range remains ac-tive.

Ð You can switch back and forth between frequency measurement with and without low-pass filter.Repeatedly press the FUNC | ENTER multifunction key, until the Hz or Hz/Fil unit of measure appears at the display. Lowest measurable frequencies and maximum allowable voltages are included in chapter 8, “Technical Data”.

Measurement with Low-Pass Filter

Attention!!Be aware of the fact that dangerous voltage spikes are not displayed during this type of measurement (see also “Voltage Comparator”.We recommend measuring voltage without the low-pass filter first, in order to be able to detect any dangerous voltages.

A 200 Hz low-pass filter can be activated if required, in order to filter out capacitively induced high frequency pulses of greater than 200 Hz, for example when performing measurements at cables, i.e. undesired voltages of greater than 200 Hz can be suppressed.

MEASURESETUP

FUNCENTER

FUNCENTER

FUNCENTER



An active low-pass filter is indicated by the Fil display. The multimeter is automatically switched to manual measuring range selection.Specified measuring accuracy is not reached with signals of greater than 100 Hz when the filter is active.

Voltage Comparator for Displaying Dangerous VoltageThe input signal or measuring signal is checked by a voltage comparator for dangerous spikes, because these do not appear at the display when the low-pass filter is used. At voltages of greater than 15 V AC or 25 V DC, a danger symbol appears at the display: .

COM mA AVTemp

Ωa Eb

Max. 600 V 1 kHz

V~: 10 mV…610 V

Hz: 1 Hz … 300 kHz~Pmax = 6 x 10

6 V x Hz

Measuring ranges:

> 15 V AC or > 25 V DC:

> 610 V:

Warnings regarding dangerous voltage:

230.0

5 ranges: 300 mV, 3 V, 30 V,300 V and 600 V

0230.6V

ACTRMS

0050.3Hz

AC

V~

Hz

V~Hz

0229.9V

ACTRMSFil

V~ with Filter

200 HzV~

0050.0 ACFilHz

Hz with Filter

!

!

FUNCENTER

FUNCENTER

FUNCENTER

FUNCENTER

200 HzHz


FUNCENTER

FUNCENTER 0ff



5.1.3 Transient OvervoltagesThe multimeters are protected against transient overvoltages of up to 4 kV with wave-front durations of 1.2 ms and halftimes of 50 μs in the voltage measuring range. If longer pulse durations are expected, for example when conducting measurements at trans-formers or motors, we recommend the use of our KS30 measur-ing adapter. It provides protection against transient overvoltages of up to 6 kV with wave-front durations of 10, and halftimes of 1000 μs. Continuous load capacity amounts to 1200 VRMS. Additional influence error caused by the KS30 measuring adapter amounts to approximately -2%.

5.1.4 Voltage Measurements at Above 600 VVoltages of greater than 600 V can be measured with a high-voltage probe, e.g. the HV31) of the HV302) from GMC-I Gossen-Metrawatt GmbH. It is absolutely essential to earth the ground terminal in this case. Observe all applicable safety precautions!

1) HV3: 3 kV2) HV30: 30 kV, for (DC) voltages only

COM mA AVTemp

Ωa Eb

Voltage Measurements at Above 600 V with the HV3 High-Voltage Probe

Black

Red

Blac

k

x1000 x100



5.2 Resistance Measurement, ΩÐ Disconnect supply power from the electrical circuit of the

device to be measured, and discharge all high-voltage capacitors.

Ð Make sure that the device under test is voltage-free. Interference voltages distort measurement results! Refer to chapter 5.1.1 regarding testing for the absence of voltage with the help of the direct voltage measurement.

Ð Set the rotary switch to “Ω”. Ð Connect the device under test as shown.

NoteUse short or shielded measurement cables in the case of high-impedance resistance.

Improving Accuracy by means of Zero BalancingCable resistance and contact resistance can be eliminated in all measuring ranges by means of zero balancing (see chapter 4.2).

COM mA AVTemp

Ωa Eb

Rx

Rx

0 V !!

0000.0kΩ

Ω

6 ranges: 300 Ω , 3 kΩ, 30 kΩ, 300 kΩ , 3 MΩ and 30 MΩMeasuring ranges: 0.1 kΩ to 31 MΩ

Ω

TempRTD

0025.6°C Pt1000

FUNCENTER

TempRTD



5.3 Temperature Measurement – Temp RTDTemperature measurement is performed with a Pt100 or Pt1000 resistance thermometer (accessory, not included), which is con-nected to the voltage input.

Selecting the Unit of Measure for Temperature

1nFo ... tEMP °C / °F

(°C = default setting)

5.3.1 Measurement with Resistance ThermometersÐ Set the rotary switch to “Ω” or “TempRTD”.Press the FUNC | ENTER key in order to change to the other measuring func-tion if required.The sensor type, i.e. Pt100 or Pt1000, is detected automatically and displayed.There are two different ways to compensate for cable resistance:

Automatic Compensation

Ð Acknowledge by pressing the ZERO | ESC key.“Short leads” appears at the display.

If you prefer to enter cable resistance directly, you can skip the following entry prompt.

Ð Short circuit the measuring instrument’s connector cables. “000.0” appears at the display. After pressing the FUNC | ENTER key, automatic compensation of cable resistance is activated for all subsequent measurements. The short-circuit can now be eliminated, and the device is ready for use.

Enter Cable Resistance

Ð Press the ZERO | ESC key once again in the automatic compensation menu.

Ð Enter the known resistance of the connector cables with the scroll keys: Select the digit to be changes with the keys, and change the respectively selected digit with the keys. The default value is 0.43 Ω. Values can be selected within a range of 0 to 50 Ω.

Ð Upon pressing the FUNC | ENTER key, the selected value is acti-vated and the display is returned to the measuring function. Cable resistance remains in memory even after the instrument has been switched off.

MEASURESETUP

FUNCENTER

FUNCENTER



COM mA AVTemp

Ωa Eb

0025.6°C Pt1000

RTD

0000.0Ω

Short Leads

r00.05Ω

Enter Cable Resistance

Automatic

RTD

Compensation

Measuring ranges RTD Pt100 -200.0 … +850.0° CRTD Pt1000 -150.0 … +850.0° C

FUNCENTER

ZEROESC

ZEROESC

FUNCENTER

0000.0kΩ

ΩΩ

TempRTD

FUNCENTER



5.4 “RSL” Loop Impedance Measurement with 2 mA Constant CurrentÐ Disconnect supply power from the electrical circuit of the


Ð Make sure that the device under test is voltage-free. Interference voltages distort measurement results!

Ð Set the rotary switch to RSL. RSL appears at the display.

Ð Connect the measuring point under test as shown.

Depending upon the selected limit value / threshold, the multimeter generates a continuous acoustic signal if the respective value is exceeded.“0L” appears at the display in the case of an open connection.The limit value can be adjusted in the “SETUP” menu (see also chapter 6.4):

1nFo ... SET rAtE ... r_sl

> 100, 200 Ω, 2 ... 3 kΩ, 0L

(2 = default setting)

MEASURESETUP

FUNCENTER

FUNCENTER

FUNCENTER COM mA A

VTemp

Ωa Eb

Rx

Rx

0 V !!

00.000kΩ

RSL

000.8Ω

RSL: 300 Ω / 3 kΩMeasuring ranges:

RSL

FUNCENTER

RSL > 100, 200 Ω, 2 to 3 kΩ, OL

0.443V

DC

FUNCENTER

RSL

(0.1 Ω to 3.1 kΩ)



5.5 Continuity Test Ð Disconnect supply power from the electrical circuit of the


Ð Make sure that the device under test is voltage-free. Interference voltages distort measurement results!

Ð Set the rotary switch to “RSL” or “ ”.

Ð Briefly press the yellow multifunction key FUNC | ENTER. A loudspeaker symbol appears at the display.

Ð Connect the conductor path under test as shown.

Depending upon the selected limit value, the multimeter generates a continuous acoustic signal in the case of continuity or short-circuiting, i.e. at a value of less than the selected limit value.“0L” appears at the display in the case of an open connection.The limit value can be adjusted in the “SETUP” menu (see also chapter 6.4):

1nFo ... SET rAtE ... bEEP

1, 10, 20, 30, 40, 90 Ω

(10 = default setting)

MEASURESETUP

FUNCENTER

FUNCENTER

FUNCENTER

COM mA AVTemp

Ωa Eb

0 V !!

0.443V

DC

R < 1, 10, 20, 30, 40, 90 Ω

FUNCENTER

RSL

FUNCENTER

R : 300 ΩMeasuring range:

000.8Ω

0000.0Ω

RSLRSL

(0.1 Ω to 310 Ω)



5.6 Diode Testing with 2 mA Constant CurrentÐ Disconnect supply power from the electrical circuit of the


Ð Make sure that the device under test is voltage-free. Interference voltages distort measurement results!Refer to chapter 5.1.1 regarding testing for the absence of voltage with the help of the direct voltage measurement.

Ð Set the rotary switch to “RSL” or “ ”.

Ð Repeatedly press the FUNC | ENTER key until the diode symbol appears at the display.

Ð Connect the device under test as shown.

Conducting Direction and Short-CircuitThe instrument displays forward voltage in volts (display: 4 places). As long as voltage drop does not exceed the maximum display value of 5.1 V, several series connected components or reference diodes can be tested with a small reference voltage and reference diodes.

Reverse Direction and InterruptionThe measuring instrument indicates overload 0L.

NoteResistors and semiconductor paths connected in parallel to the diode distort measurement results!

COM mA AVTemp

Ωa Eb

Forward Direction Reverse Direction

0 V !

0.6540.L

to 5.100 VMeasuring range:

+ –

0.443V

!

000.8Ω

DC

FUNCENTER

RSL



5.7 Capacitance Measurement Ð Disconnect supply power from the electrical circuit of the device to

be measured, and discharge all high-voltage capacitors.

Ð Make sure that the device under test is voltage-free. Capacitors must always be discharged before measurement is performed. Interference voltages distort measurement results! Refer to chapter 5.1.1 regarding testing for the absence of voltage with the help of the direct voltage measurement.

Ð Set the rotary switch to “ ”.

Ð Connect the (discharged!) device under test to the sockets with the measurement cables as shown.

NoteThe “–” pole of polarized capacitors must be connected to the “⊥” jack. Resistors and semiconductor paths connected in parallel to the capacitor distort measurement results!

5.7.1 Cable Length Measurement mIn the cable length measuring mode, the instrument calculates length as a function of the capacitance value entered by the user:

Preparation and execution of this measurement is the same as for capacitance measurement.

Ð Press the yellow multifunction key FUNC | ENTER. “k” and “m” (i.e. kilometers) appear at the display instead of “F”.

Refer to chapter 6.4 with regard to adjusting the “CAP” scaling factor (capacitive linear electric constant).

NoteWhen measuring cable length, make sure that the cable parameters (e.g. cross-section) are identical. Varying cable parameters, for example interconnected cables of varying type or cross-section, distort measurement results.

Length (km) =measured capacitance (nF)capacitance value (nF / km)



5.8 Insulation Resistance Measurement: in Telecommunications Networks – MΩISO Function

Three jacks (a, b and E) are provided for measurements in symmetrical copper cable networks with two conductors and a shield. The rotary selector switch can be set to determine whether insulation testing will be performed between a and b, a and E or b and E.Interruption of a single core or contact with an open-circuit core (capacitive asymmetry) can be recognized by switching rapidly with the POL / UISO key.In the event of a good cable, the bar graph must be identical in the a-E and b-E selector switch positions (open-circuit cable only!).Long cable: long bar graph displayShort cable: short bar graph displayThe overall length of the bar graph represents a range of capacitance from 50 nF to 100 nF.

COM mA AVTemp

Ωa Eb

0 V !!

10.38F

+ –

+ –

μ

Measuring range: 10 pF to 300 μF

3.100 km / 31.000 kmMeasuring ranges:

COM mA AVTemp

Ωa Eb

m

15.00m

m

k

FUNCENTER

5 ranges: 30 nF, 300 nF, 3 μF, 30 μF and 300 μF



5.8.1 Connecting the Measurement Cables

NoteTesting the Measurement Cables The test probes at the ends of the measurement cables should be short circuited before performing insulation resistance measurements with the selector switch in the Ω or the position, in order to make sure that a value close to 0 Ω is displayed at the instrument. Incorrect connection or a broken measurement cable can be detected in this way.

Ð Cable connection: Connect the measurement cables to jacks a, b and E.

5.8.2 Detection of Interference VoltagesÐ Set the rotary switch to the a-b, a-E and b-E positions, one

after the other, in order to display any interference voltage for all three conductor pairs.

NoteInsulation resistance may only be measured at voltage-free devices.

5.8.3 Performing Insulation Resistance Measurements

Caution High-Voltage!Do not touch the conductive ends of the test probes when the instru-ment has been activated for the measurement of insulation resistance. If at all possible, only plug in the measure-ment cables actually required for this test, because loose test probes and cable ends represent a contact hazard. You may otherwise be exposed to a current of 1.5 mA (limited in the measuring instrument), and although this is not life endangering, the resulting electrical shock is quite discernible. If, on the other hand, measurement is being performed on a capaci-tive device under test, for example a cable, it may be charged up to approximately ±120 V. Touching the device under test after measurement has been performed is life endangering in this case!

COM mA AVTemp

Ωa Eb

00.00Ω

Short circuit the measurement cables.

aab

bEE

Rx

0 V !!

a ba E

Eb

a-ba-Eb-E

MΩiso at 100 V

UISO

Interference Voltage Detection

000.0 UISOV

DC

ACTRMS

iso



Ð Starting the insulation resistance measurement: Briefly press the UISO ON / OFF key. Insulation resistance is displayed for the currently selected conductor pair.

Ð Reversing polarity of the cable under test:

– Normal polarity reversal: Press and hold the POL / UISO key.

– Rapid polarity reversal: Press the POL / UISO key at short intervals. bAL.C appears at the display (ballistic capacitance) for relative cable length determination. After key activation has ceased for a period of approximately 2 seconds, the instrument is switched back to standard insulation resistance measurement.

Ð Switch the rotary selector switch to the MΩISO_a-b, MΩISO_a-E and MΩISO_b-E positions, one after the other, in order to execute the desired tests.

Auto-ranging is active during insulation resistance measurement. If the measured value is less than 10% of the measuring range after manual measuring range selection (see chapter 4.1.2), u r (under-range) appears at the display. You should then select the next smaller measuring range with the help of the key.

Automatic Recognition of Interference Voltage During Insulation Resistance MeasurementIf, during insulation measurement, the instrument detects an interference voltage of greater than 15 V AC or 25 V DC (assuming: Uin-terference ≠ UISO, Riq < 100 kΩ), „Error“ is briefly displayed at the LCD. The instrument is then automatically switched to voltage measurement, and the currently measured voltage value is dis-played.

000.00MΩ

MΩ

a-ba-Eb-E

MΩiso at 100 V

iso

a-b

FUNCENTER

UISO ON / OFF

ZEROESC

POL / UISO

FUNCENTER

UISO ON / OFF

a-E

FUNCENTER

UISO ON / OFF

ZEROESC

POL / UISO

FUNCENTER

UISO ON / OFF

b-E

FUNCENTER

UISO ON / OFF

ZEROESC

POL / UISO

FUNCENTER

UISO ON / OFF

UISO

000.0 UISOV

FUNCENTER

+ –+–

aab

bEE

+ –

0 V !

Reverse polarity

Discharge

Switch testvoltage on

DC

ACTRMS

100 V

iso



NoteA polarity-dependent dead zone results in erroneous measurements for automatic interference voltage detection. The dead zone lies within a range of 60 to 135 V DC ACTRMS sinusoidal (in the case of an interference voltage whose value is equal to that of measuring voltage, the two voltages neutralize each other).

Manual switching to insulation resistance measurement is disabled for as long as voltage is applied to the test terminals. If interference voltage is no longer present, the MΩISO measurement can be started by once again pressing the UISO ON / OFF key.If a voltage of greater than 110 V DC AC is present, it is indicated by means of an acoustic signal, as well as optically with the “U HI ” symbol at the display.

Attention!!If „Error“ appears at the display, the cable (the device under test) is most likely capacitively charged to a significant extent. Remedy: Short circuit conductors a-b, a-E and b-E. Repeat the measurement.

5.8.4 Ending the Measurement and DischargingÐ Briefly press the UISO ON / OFF key.

After measurement has been completed, any remaining residual voltage is displayed which may result from cable capacitance. The instrument’s internal 100 kΩ resistor causes rapid discharging. However, contact to the device under test must be maintained. The falling voltage value can be observed directly at the LCD. Do not disconnect the device under test until the voltage value has dropped to below 25 V!

NoteThe instrument’s batteries are rapidly depleted during insulation resistance measurement. Deactivate insulation resistance measurement between measurements for this reason. Use only alkaline manganese batteries in accordance with IEC 6 LR61.

NoteRotary selector switch positions a-b, a-E and b-E are intended solely for the detection of interference voltage during insulation resistance measurement.Voltage measurement may only be performed with the rotary selector switch set to the V , V or the V position. The DATA, MIN/MAX and ZERO functions are not available in this case.



5.9 Current Measurement

Notes Regarding Current Measurement• The multimeter may only be operated with installed batteries or

rechargeable batteries. Dangerous currents are otherwise not indicated, and the instrument may be damaged.

• Set up the measuring circuit in a mechanically secure fashion, and secure it against inadvertent breaks. Select conductor cross-sections and lay out connections such that they do not overheat.

• A continuous acoustic signal warns of current greater than 1.1 A.• The input for the current measuring range is equipped with a

fuse link. Maximum permissible voltage for the measuring circuit (= rated voltage of the fuse) is 600 V AC/DC.Use specified fuses only! The fuse must have a breaking capacity of at least 10 kA.

• If the fuse for the active current measuring range blows, “FUSE” appears at the digital display, and an acoustic signal is generated at the same time.

• If a fuse should blow, eliminate the cause of overload before placing the instrument back into service!

• Fuse replacement is described in chapter 9.3.• Be absolutely certain that the measuring ranges are not

overloaded beyond their allowable capacities. Limit values are included in chapter 8, “Technical Data”, in the table entitled “Measuring Functions and Measuring Ranges” in the “Overload Capacity” column.



5.9.1 Direct and Pulsating Current Measurement, Direct Connection, A DC and A (DC+AC)

Ð First disconnect supply power from the measuring circuit or the power consumer (1), and discharge any capacitors.

Ð In accordance with the current to be measured, set the rotary switch to A or A .

Ð Select the type of current appropriate for the measured quantity by briefly pressing the FUNC | ENTER multifunction key. Each time the key is pressed, the instrument is switched back and forth between A DC and A (DC + AC)TRMS, which is indi-cated by means of an acoustic signal. The current type is indi-cated at the LCD by means of the DC or the (DC+AC)TRMS symbol.

Ð Safely connect the measuring instrument (without contact resistance) in series to the power consumer (2) as shown.

Ð Switch supply power to the measuring circuit back on (3).

Ð Read the display. Make a note of the measured value if the instrument is not being operated in the memory mode or the transmission mode.

Ð Disconnect supply power from the measuring circuit or the power consumer (1) once again, and discharge any capacitors.

Ð Remove the test probes from the measuring point and return the measuring circuit to its normal condition.

COM mA AVTemp

Ωa Eb

~Rx

~Rx

1 32

!

AA 003.50

mA

DC

003.50mA

DC

ACTRMS

A

A

A : 0.1 μA . . . 1.1 AA : 3 μA . . . 1.1 A5 ranges: 300 μA, 3 mA, 30 mA, 300 mA and 1 A

88.8.8.8

!

I > 1.1 A

Current

Measuring ranges:

FUNCENTER

Current measurement may only be performed with installed batteries!



5.9.2 Alternating Current and Frequency Measurement, Direct Connection, A AC and Hz

Ð First disconnect supply power from the measuring circuit or the power consumer (1), and discharge any capacitors.

Ð In accordance with the current or frequency to be measured, turn the rotary switch to A~ or Hz.

Ð Select the desired measured quantity by briefly pressing the FUNC | ENTER multifunction key. Each time the key is pressed, ACTRMS and Hz are alternately selected, and switching is acknowledged with an acoustic signal.

Ð Safely connect the measuring instrument (without contact resistance) in series to the power consumer as shown.

Ð Switch supply power to the measuring circuit back on (3).

Ð Read the display. Make a note of the measured value if the instrument is not being operated in the memory mode or the transmission mode.

Ð Disconnect supply power from the measuring circuit or the power consumer (1) once again, and discharge any capacitors.

Ð Remove the test probes from the measuring point and return the measuring circuit to its normal condition.

COM mA AVTemp

Ωa Eb

~Rx

~Rx

1 32

A~Hz A~

Hz

003.50mA

ACTRMS

0050.1Hz

AC

88.8.8.8

!

!I > 1.1 A

Current measurement may only be performed with installed batteries!

Current

FUNCENTER

Measuring ranges:

Hz: 1 Hz . . . 31 kHz

A ~: 3 μA . . . 1.1 A5 ranges: 300 μA, 3 mA, 30 mA, 300 mA and 1 A

3 ranges: 300 Hz, 3 kHz and 30 kHz



5.9.3 Direct and Pulsating Current Measurement with Clip-On Current Sensor, A DC and A (DC+AC)

Transformer Output, Voltage/CurrentWhen a clip-on current sensor is connected to the multimeter (V input), all current displays appear with the correct value in accordance with the selected transformation ratio. The only prerequisite is that the current sensor is equipped with at least one of the below listed transformation ratios, and that the ratio has been previously selected in the following menu (Cl ip ≠ 0FF) (see also chapter 6.4).

Current Clip Setup Menu


0ff/1 / 10/100/1000

Maximum allowable operating voltage is equal to the current transformer’s nominal voltage. When reading the measured value, additional error resulting from the clip-on current sensor must also be taken into consideration (default value: Cl ip = 0ff = voltage dis-play).

Trans. RatioCL IP

Measuring Ranges Clip Type300 mV 3 V 30 V

1:1 1 mV / 1 mA 300.0 mA 3.000 A 30.00 A WZ12C

1:10 1m V / 10 mA 3.000 A 30.00 A 300.0 A

WZ12B, Z201A/B, METRAFLEX

1:100 1m V / 100 mA 30.00 A 300.0 A 3,000 kA

Z202A/B, METRAFLEX

1:1000 1 mV/1 A 300.0 A 3,000 kA 30.00 kA

Z202A/B, Z203A/B, WZ12C, METRAFLEX

MEASURESETUP

FUNCENTER

FUNCENTER

FUNCENTER

COM mA AVTemp

Ωa Eb

~Rx

Current

0035.0A

1:1000

ADC

0035.0A

1:1000

ADCACTRMS

FUNCENTER

Ri

Ri ~ 9 MΩ

V

V


FUNCENTER

FUNCENTER 0ff

Measuring ranges:

mA / A: see table



5.9.4 Alternating Current Measurement with Clip-On Current Sensor, A AC and Hz

Transformer Output, Voltage/CurrentWhen a clip-on current sensor is connected to the multimeter (V input), all current displays appear with the correct value in accordance with the selected transformation ratio. The only prerequisite is that the current sensor is equipped with at least one of the below listed transformation ratios, and that the ratio has been previously selected in the following menu (Cl ip ≠ 0FF) (see also chapter 6.4).

Current Clip Setup Menu


0ff/1 / 10/100/1000

Maximum allowable operating voltage is equal to the current transformer’s nominal voltage. When reading the measured value, additional error resulting from the clip-on current sensor must also be taken into consideration (default value: Cl ip = 0ff = voltage dis-play).

Trans. RatioCL IP

Measuring Ranges Clip Type300 mV 3 V 30 V

1:1 1 mV / 1 mA 300.0 mA 3.000 A 30.00 A WZ12C

1:10 1m V / 10 mA 3.000 A 30.00 A 300.0 A

WZ12B, Z201A/B, METRAFLEX

1:100 1m V / 100 mA 30.00 A 300.0 A 3,000 kA

Z202A/B, METRAFLEX

1:1000 1 mV/1 A 300.0 A 3,000 kA 30.00 kA

Z202A/B, Z203A/B, WZ12C, METRAFLEX

MEASURESETUP

FUNCENTER

FUNCENTER

FUNCENTER

0035.0A

ACTRMS

A~

Hz

1:1000

0050.1Hz

AC

1:1000

FUNCENTER

V~Hz

COM mA AVTemp

Ωa Eb

~Rx

Current

Ri ~ 9 MΩ

Ri

Measuring Ranges:

Hz: 1 Hz . . . 31 kHz


FUNCENTER

FUNCENTER 0ff

mA / A: see table

3 ranges: 300 Hz, 3 kHz and 30 kHz


Device and Measuring Parameters

6 Device and Measuring ParametersThe instrument’s “SETUP” mode (menu mode) makes it possible to set operating and measuring parameters, query information and activate the interface.

Ð The menu mode is accessed by pressing theMEASURE | SETUP key, assuming that the instrument is switched on and set to “Measure” (measuring mode operation). “1nFo” appears at the display.

Ð The main menus, i.e. the “SET” and “tEMP” menus, as well as the “SEnd” and “StorE” menus, are accessed, and the display is returned to “InFo”, by repeatedly activating the keys (in any direction).

Ð After selecting the desired main menu, sub-menus are accessed by pressing the FUNC | ENTER key.

Ð The desired parameter is selected by repeatedly pressing the keys.

Ð In order to check or change a parameter, acknowledge it with the FUNC | ENTER key.

Ð The keys can be used to position the cursor at the entry position. The desired value is selected with the help of the keys.

Ð Changes can only be accepted with the FUNC | ENTER key.

Ð You can return to the sub-menu without making any changes by pressing the ZERO | ESC key, and to the main menu by pressing the ZERO | ESC key once again etc.

Ð You can switch to the measuring mode from any menu level by pressing the FUNC | ENTER key.

After repeatedly pressing the MEASURE | SETUP key (without first turning the multimeter off), you can return to the last selected menu or parameter from the measuring mode.

Example: Setting Time

1nFo ... set rAte ... t iME

10:24 (hh:mm)

Setting hours and minutes: Advance to desired entry position. Change the setting, the entry position blinks.

Press and hold the key to change the setting rapidly.The new time setting is activated after acknowledgement.

MEASURESETUP

FUNCENTER

FUNCENTER

FUNCENTER

FUNCENTER



6.1 Paths to the Various Parameters 6.2 List of All Parameters

bAtt:uers ion:dAtE:t iME:0CCvP:

1nFo tEMPSEnd SET StorE

StArtStoP

000.0CLEArStArtStoP

Sub-Menus / Parameters ↓

rAtE 0..d iSPA.d iSPCL iP APoFFv_1soCapr _slbEEPirStb Addr dAtEt iME

°C°F

Main Menus →

Query Set Set Set Set

FUNCENTER

FUNCENTER

FUNCENTER

FUNCENTER

FUNCENTER

01nfoMEASURE

SETUP020.00V

DC

ACTRMS

SelectionFUNCENTER

SelectionFUNCENTER

SelectionFUNCENTER

SelectionFUNCENTER

Parameter Page: Header0.d iSP 51: 0.diSP – show/hide leading zerosAddr 55: Configuring Interface Parameters

A.d iSP 51: A.diSP – analog display: select display modeAPoFF 51: APoFF – specified time for automatic shutdown and continuous ON

bAtt 50: bAtt – query battery voltage

bEEP 52: bEEP – set limit value for continuity testing

Cap 53: CAP – scaling factor for cable length measurement (capacitive linear electric constant)

CLEAr 23: Measurement Data Recording

CL IP 46: Direct and Pulsating Current Measurement with Clip-On Current Sensor, A DC and A (DC+AC)47: Alternating Current Measurement with Clip-On Current Sensor, A AC and Hz

dAtE 50: dAtE – query date, 52: dAtE – enter date

EMpty 23: Measurement Data Recording

1nfo 50: Querying Parameters – InFo Menu (as moving letters)

irStb 55: Configuring Interface Parameters

0CCvP 23: Measurement Data Recording

rAtE 51: rAtE – set the sampling rate

r_sL 53: r _SL – set limit value for protective conductor resistanceSEnd 54: Activating the Interface

SET 51: Entering Parameters – SETUP Menu

StArt

23: Measurement Data RecordingStoP

store

tEMP 32: Temperature Measurement – Temp RTD

t iME 50: tiME – query time, 52: tiME – set time



6.3 Querying Parameters – InFo Menu (as moving letters)

bAtt – query battery voltage

1nFo bAtt: 2.75 V.

vErSion – query firmware version

1nFo bAtt: uErS ion: 1.00

dAtE – query date

1nFo bAtt: ... dAtE: 31.12.05 (DD.MM.YY) D = day, M = month, Y = year

Date and time must be reentered after replacing the batteries.

tiME – query time

1nFo bAtt: ... t iME: 13:46:56(hh:mm:ss)h = hours, m = minutes, s = seconds

Date and time must be reentered after replacing the batteries.

OCCUP – query memory occupancy

1nFo bAtt: ... 0CCvP: 000.0%

uErS ion 50: vErSion – query firmware versionParameter Page: Header

MEASURESETUP

FUNCENTER

MEASURESETUP

FUNCENTER

MEASURESETUP

FUNCENTER

MEASURESETUP

FUNCENTER

MEASURESETUP

FUNCENTER



6.4 Entering Parameters – SETUP Menu

rAtE – set the sampling rateThe sampling rate specifies the time interval after which the respective measured value is transmitted to the interface, or to measured value memory.Any one of the following sampling rates can be selected:[mm:ss.t]: 00:00,1, 00:00,2, 00:00.5, 00:01,0, 00:02,0, 00:05.0[h:mm:ss.t] (h=hours, m=minutes, s=seconds, z=tenths of a sec.):0:00:10, 0:00:20, 0:00:30, 0:00:40, 0:00:50, 0:01:00, 0:02:00, 0:05:00, 0:10:00, 0:20:00, 0:30:00, 0:40:00, 0:50:00, 1:00:00, 2:00:00, 3:00:00, 4:00:00, 5:00:00, 6:00:00, 7:00:00, 8:00:00, 9:00:00Setting the Sampling Rate

1nFo ... SET rAtE

00:00.1 ... 00:00.5 ... 9:00:00

(00:00.5 = 0.5 s = default value)

0.diSP – show/hide leading zerosThis parameter determines whether or not leading zeros will appear in the measured value display.

1nFo ... SET rAtE ... 0.diSP

0000.0 : with leading zeros (default value)0.0 : leading zeros suppressed

A.diSP – analog display: select display modeOne of two different display modes can be selected for the analog display:• bArG: bar graph• Po int: pointer

1nFo ... SET rAtE ... A.d iSP

bArG / Po int

(po int = default setting)

APoFF – specified time for automatic shutdown and continuous ONThe instrument is switched off automatically if the measured value remains unchanged for a long period of time and if none of the keys or the rotary switch have been activated before the specified time “APoFF” (entered in minutes) has elapsed.If the on setting is selected, the multimeter is set for long-term measurement and ON appears in the display to the right of the battery symbol. In this case, the multimeter can only be switched off manually. The “on” setting can only be cancelled by changing the respective parameter, and not by switching the instrument off.

1nFo ... SET rAtE ... APoFF

10 ... 59 min on

(10 minutes = default setting)

MEASURESETUP

FUNCENTER

FUNCENTER

FUNCENTER

MEASURESETUP

FUNCENTER

FUNCENTER

FUNCENTER

MEASURESETUP

FUNCENTER

FUNCENTER

FUNCENTER

MEASURESETUP

FUNCENTER

FUNCENTER

FUNCENTER



bEEP – set limit value for continuity testing

1nFo ... SET rAtE ... bEEP

1, 10, 20, 30, 40, 90 Ω

(10 Ω = default setting)

irStb – status of the infrared receiver in the stand-by mode

See chapter 7.2 on page 55 regarding settings.

Addr – set device address

See chapter 7.2 on page 55.

dAtE – enter dateEntering the current date makes it possible to acquire measured values in real-time.

1nFo ... SET rAtE ... dAtE

31.12 (DD: day . MM: month)

2005 (YYYY: year)

Date and time must

Documents

METRAHIT T-COM€¦ · METRAHIT⏐T-COMCable Multimeter for Measurements in Symmetrical Copper Cable Networks Operating Instructions 3-349-381-03 6/7.15