HL6000 manual - first draft 061703...the transmitter signal level be manually adjusted using the arrow keys in Man mode. The transmitter LCD has and Auto/Man indicator. Operating Manual

MODEL HL6000 Digital Correlator

Operation Manual

Operating Manual HL6000

30.01.2004

ISO 9001 CERTIFIED

Metrotech has received ISO 9001 Quality Management System Certification.

Metrotech adheres to the quality standard guidelines of ISO 9001 and ensures quality in its design/development, production, installation, and servicing disciplines.

© Metrotech Corporation 2003

Metrotech Corporation

3251 Olcott St. Santa Clara, CA 95054

USA

Tel: 1.800.446.3392; 1.408.734.1400 Fax: 1.408.734.1415

E-mail: [email protected] Internet: www.metrotech.com


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Index

1 Quick Start Guide 1 1.1 Quick Start Guide amplifier transmitter TR A / TR B 1 1.2 Quick Start Guide HL6000 Control Unit 2

2 Operating Manual HL6000 Transmitter 3 2.1 Controls of the transmitter TR A / TR B 3 2.2 Front panel icons 3 2.3 Operating Manual TR A / TR B 4 • Position transmitter 4 • Switch transmitter on and off 4 • Listen to the leak noise / level display 5

3 Operating Manual HL6000 Control Unit 6 3.1 User Interface HL6000 Control Unit 6

4 Conducting Correlation 8 4.1 Pipe data: selection of material and direct acoustic input 8 4.2 Pipe data: diameter 9 4.3 Pipe data: pipe length 10

5 The Correlation Monitor 11 5.1 Correlation Type 11 5.2 Correlation Status 12 5.3 Noise Level 12 5.4 Radio Reception 12 5.5 Correlogram 12 5.6 Pipe Data 12 5.7 Coherence 13 5.8 Status Bar Correlation 13 5.9 Menu Bar 14 5.9.1 Pipe 14 5.9.2 Filter 14 5.9.3 Cursor 15 5.9.4 Menu 16 5.9.5 Listening 16

6 Menu Display (Main Menu) 17 6.1 Sensor selection and connection 18 6.2 Loading and saving a trace (only standard and pro version) 19 6.3 PC Communication (only standard and pro version) 20 6.4 Velocity measurement 21 6.5 Point location (only pro version) 22 6.6 Overview measurement 24


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6.7 Correlation type 25

7 Configurations 26 7.1 Beep 27 7.2 Automatic switchoff 27 7.3 Illumination 27 7.4 Dimension unit 27 7.5 Time and date 27 7.6 Filter 27

8 Power Supply 28 8.1 Load 28

9 Technical Data 29 9.1 HL6000 Correlator control unit 29 9.2 Transmitter TR A/TR B 29 9.3 Sensors PAM CORR 30


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1 Quick Start Guide

1.1 Quick start guide amplifier transmitter TR A / TR B

Function Operation

1. Position Transmitter A (orange) at installation location 1 and attach the sensor to the valve mechanism or hydrant.

2. Switch on transmitter A. Raise antenna and close lid.

3. Position transmitter B (blue) at installation location 2 and attach the sensor to the valve mechanism or hydrant.

4. Switch on transmitter B. Raise antenna and close lid.

Figure 1 : Positioning the transmitters and installing the sensors


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1.2 Quick start guide HL6000 control unit

Function Operation 1. Switch on. 2. Start correlation by pressing the rotary knob (Enter). 3. Pipe material Select desired material with rotary knob and confirm with Enter.

4. Pipe diameter Select desired diameter with rotary knob and confirm with Enter. 5. Enter pipe length, confirm with Enter. Pressing the Enter knob again concludes the pipe selection menu.

6. Correlation starts

7. Read leak distance (it may be necessary to wait some minutes until a clear correlation is visible.)


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2 Operating Manual HL6000 Transmitter

2.1 Transmitter A and B controls

Figure 2 : User interface transmitter A / B

2.2 Front panel icons

^

Figure 3: Headphone jack and charging jack

Figure 4: Sensor jack

:

Figure 5: Antenna jack


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Figure 6 : Transmitter keypad

2.3 Operating manual transmitter A and B

• Position transmitter

Position Transmitter A (orange) at installation location 1 and attach the sensor to the valve mechanism or hydrant. Position Transmitter B (blue) at installation location 2 and attach the sensor to the valve mechanism or hydrant.( See Figure 1 ) Always place the transmitters standing straight with the antenna facing upwards

• Switch transmitter on/off

Switch transmitter on and off by pressing the yellow on/off button. At power up, the LCD will first display the software version and the remaining battery charge for approx. 3 seconds. Then the transmitter is ready for operation. The LCD backlight stays on for approx. 1 minute after any button operation and then turns off automatically. The transmitter turns automatically turns off after two hours of operation time to prevent discharge of the batteries in case the operator forgets to turn off the transmitter.


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• Listen to the leak noise / level display

The leak noise can be listened to via the headphone jacks on both transmitters A and B. Therefore an evaluation is possible before correlation and the user can decide whether the recorded noise can be attributed to a water leak or some other noise source (pump, etc.) If necessary, the headphone volume can be

regulated by using the arrow keys. The noise level is shown as a bar and a numerical value so that simple level comparison is possible at various testing points. The signal level transmitted by radio, as well as the sensitivity of the level display are not influenced by changes in audio volume when the transmitter is operating in the “Auto“ mode.

• Auto/Man mode As a default, the transmitter will always operate in the automactic (“Auto”) transmission mode. In Auto mode the transmitter automatically adjusts its communication settings to ensure optimal communication with the HL6000 control unit. The transmitter should only be switched to manual (“Man”) mode if the signal level received on the HL6000 control unit is too high. Only then should the transmitter signal level be manually adjusted using the arrow keys in Man mode. The transmitter LCD has and Auto/Man indicator.


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3 Operating Manual HL6000 control unit

3.1 User Interface HL6000 control unit

Figure 7 : User interface HL6000 control unit

The on/off key allows to switch the unit on and off. It also allows to turn activate and deactivate the LCD backlight.

The Escape key allows to exit a menu or restart a measurement.

PC Serial Interface

ON\OFF\Backlight

Escape

Rotary Knob\Enter

Antenna

Sensor

Headphones/Charger


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The rotary knob allows to select individual menu items and to confirm a selection by pushing the rotary knob (Enter function).

Press the On/Off key to turn the correlator on . The unit comes on in the welcome display (Figure 8: Welcome Display). The welcome display provides information on sensor configuration, system configuration (date, time), battery status and software version. Now you can browse through the desired menu options by using the rotary knob for navigation. Confirm your selection by pressing the rotary knob. Right after power on, you can also adjust the display contrast if necessary. To do so, move the rotary know while holding down the ESC key.

Figure 8 : Welcome display

Version / Serial no.

Transmitter / Sensor selection

Date and Time

Battery charge

Menu Bar


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4 Conducting a Correlation

4.1 Pipe data: selection of material and direct acoustic input

Select the “Correlation” function in the menu bar at the lower right corner of the welcome screen with the rotary knob and confirm your choice by pressing the knob once. The material selection screen will appear. Now the desired material can be selected and confirmed with the rotary knob. Alternatively, you can enter the sound propagation velocity directly if this data is known to you.

Figure 9 : Choice of material and acoustic input

If you choose to make a direct sound propagation velocity entry, you will be taken to the pipe section input screen, where the velocity and pipe length data must be entered using the rotary knob. (See Figure 11)

Direct acoustic input

Choice of Material

Menu Bar


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4.2 Pipe data: pipe diameter input

Using the rotary know, select the desired pipe diameter.

Figure 10 : Select pipe diameter

Pipe Diameter

Menu Bar


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4.3 Pipe data: pipe section length

Enter the length for the first pipe section using the rotary knob.

Figure 11 : Pipe input with only one section

Up to 6 different pipe sections can be selected. When you have entered all pipe data (material, pipe length) confirm your selection by moving onto the “done” menu bar or select the next pipe section with the rotary knob. The input sequence automatically guides you through the “Material” and “Diameter” submenus. When you have selected „done“, the correlation starts and the correlation screen is shown. To delete data in a pip section, select that section and press „ESC“. When entering mixed pipe sections it is essential to start with “pipe 1”. Also make sure you that “pipe 1” is the one closest to sensor A. Enter further pipe sections moving from sensor A towards sensor B.

Pipe Data

Menu Bar


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5 The Correlation Monitor

Figure 12: Correlation monitor

The following data can be found on the correlation screen:

• Correlation type: Correlation / Autocorrelation • Correlation status: Active / elapsed time in min/sec • Noise level: Transmitter A / B • Radio reception: Transmitter A / B ( “X“ indicates no radio reception!) • Upper graphic: Correlation monitor • Pipe data: Material / total length • Noise level of transmitter A • Noise level of transmitter B • Lower graphic: Coherence / filter selection • Status bar: “Warning – correlation doubtful”

“Warning – center correlation” • Menu bar: Pipe / Filter / Cursor / Menu

5.1 Correlation Type

Menu options for “Correlation Type” are correlation (cross correlation) and autocorrelation.

Antenna Symbol

Noise Level Transmitter B

Elapsed correlation time

Correlation Type Status

Menu Bar

Correlation

Coherence

Status Bar

Radio Reception


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5.2 Correlation Status

The correlation starts once the pipe data has been entered. Using the rotary know wile the correlation is in progress with halt the measurement. To restart a measurement without changing the existing test parameters (material and filter) press the ESC key. The upper status bar on the LCD screen indicates that a correlation is in progress (“active”). It also contains the elapsed correlation time in minutes and seconds.

5.3 Noise Level

The two vertical bars at each side of the LCD screen indicate the noise intensity of channels A and B.

5.4 Radio Reception

The status of the radio reception is displayed below the noise level. Reception is represented with “A“ and “B“. If the reception is interrupted an “X“.marks the respective channel.

5.5 Correlogram

The upper graphic represents the correlation trace. A definite maximum, permanent during the entire test period, usually indicates a definite correlation and therefore a reliable test result. If several maxima occur, there could be several leakages or the correlation result is indefinite. This happens especially if both channels transmit noises unrelated to each other. If there is a leak, and the leak noise is received by both sensors, then there will usually be a definite maximum in the correlation. With PE pipes, it may be necessary to wait for several minutes until you receive a definite correlation result. The correlator constantly averages the results and you can practically see the correlation maximum “grow” from the trace. With metallic pipes you can expect a good correlation result faster due to the better transmission of the sound waves generated by the leak in the pipe.

5.6 Pipe Data

Underneath the correlation trace the pipe data (material and length), the leak position and the delay time are displayed. With mixed pipe runs there is only a note “Mix“. To see the parameters of the individual sections, select the “Pipe“ menu.


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5.7 Coherence

The display of the coherence spectrum is used mainly for effective adjustment of the filters. The coherence will be large where mutual spectral parts contributing to the correlation can be found on both channels. Filter settings can be adjusted to ensure that only high level spectral parts are located within the filter limits. If, for example, one of the sensors records some interferences, these will be filtered out and not used for calculation of the correlation. The HL6000 initially automatically sets the filters according to the selected pipe material. If no satisfactory test result is received, the filter limits should be selected according to the coherence trace. Try several manual filter settings if the correlation results are unclear.

5.8 Status Bar Correlation

The current measurement status is indicated in the status bar in the lower part of the LCD display. During correlation the following messages can be displayed: “Warning, Correlation doubtful!“: The value of the correlation maximum constantly changes. The correlation information is very uncertain. “Warning, Possible center correlation!“: If, for instance, only one channel can be received, or if the leak noise is superimposed by the same interfering signal on both channels, then a correlation maximum is shown between the two sensors even though there may not actually be a leak. If this occurs the system should be checked thoroughly. If no interference can be found, the leak really is in the centre. “Warning, Leak maybe outside test range“: If there is a leak outside the area between sensors A and B, a correlation maximum will appear at the sensor closest to the leak. In this case it is impossible to establish if the leak is exactly at the point where the sensor has been positioned (e.g. a faulty valve) or outside of the area between sensors A and B In this case, leave the position of the sensor closed to the leak unchanged and move the second sensor beyond the fist to the other side of the leak.


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5.9 Menu Bar

The menu bar allows to select the following menus: o Pipe: Enter pipe section data o Filter: Filter selection o Cursor: Cursor movement o Menu: Back to menu screen o A / B: Listen to channel A / B

These menu points are selected by means of the rotary knob. Browse through the selections by turning the rotary knob in either direction. Press the rotary knob shortly (“Enter”) to select the highlighted menu option.

5.9.1 Pipe

Selecting the “Pipe” menu option with “Enter” takes you back to the pipe selection menu (see 4.1). To enter another pipe section, press “Enter” once the pipe section length has been entered for the previous pipe section.

5.9.2 Filter

Filter settings are changed in the coherence window portion of the correlation display. The active filter setting is indicated by a rectangular frame inside the coherence window. Only spectral parts inside the framed portion are used by the HL6000 to calculate the correlation. Press “Enter” once to activate the lower cut-off frequency selection. Move the vertical bar left or right by turning the rotary knob. Press “Enter” key again to confirm the new lower cut-off frequency. Next, the upper cut-off frequency is selected by turning the rotary knob. Confirm the desired new upper cut-off frequency by with “Enter”. Once the filter selection is complete, the HL6000 automatically starts a new correlation using the new filter settings.


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Figure 13: Filter left Figure 14: Filter right

5.9.3 Cursor

In this mode, the automatic cursor may be moved manually with the rotary selector in order to analyse the correlation trace. The box below the correlation window displays the leak position relative to sensors A and B and the delay time. The correlation continues once the new cursor position has been confirmed.

Figure 15: Cursor position Figure 16: Change cursor pos.


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5.9.4 Menu

Move the cursor over the “menu” selection and press “Enter” to get back to the menu display

5.9.5 Listening

To listen to a single transmitter, connect the headphones (see headphone jack 3.1) and select “A” or “B” with the rotary selector. Press “Enter” to receive channel A or B only. When listening to a single transmitter, the letter A or B below the transmitter signal bar on the LCD screen is highlighted. In single transmitter listening mode, both headphone channels are fed by a signal transmitter mono signal. To adjust the audio volume, turn the rotary knob to the left or right. To listen to both channels again, just press the “Enter” key one more time. The headphones now operate in stereo mode again with channel A played by the left earpiece and channel B played by the right earpiece. .

Figure 17: Listening channel A Figure 18: Listening channel B


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6 Menu Display (Main Menu)

Figure 19: Main menu

The following options may be selected in the main menu:

sensor selection and connection selection of sensor type and connection mode

load trace load a saved correlation trace store trace store a correlation trace PC communication transmit all stored traces to PC velocity measurement determine sound velocity leak pinpointing leak pinpointing using an optional ground

microphone overview measurement requires less data input to produce a quick overview

of the leak situation correlation type correlation (2 sensors) / autocorrelation (1 sensor) system configuration date, time, auto shut-off delay, backlight shut-off

delay


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6.1 Sensor selection and connection

The following options are available: • correlation using two radio transmitters (both channels on “radio”) • correlation unsing one radio transmitter and one sensor connected to the

direct input jack of the HL6000 control unit (one channel on “radio” and the other channel on “direct”).

Connection selection A Orange B Blue Radio Radio Radio Direct Direct Radio Chose the desired combination with the rotary knob and confirm with ENTER. Either accelerometers (standard) or hydrophones (optional) may be used as sensors. Hydrophones allow direct contact between the sensor and the water medium. Hydrophones work better in networks with poor sound propagation such as long plastic pipes or pipes with low operating pressure. A key disadvantage, however, is that the sensors can only be positioned at hydrants or in other places with direct access to the water medium.

Sensor selection A Orange B Blue Sensor Sensor Sensor Hydrophone Hydrophone Sensor Hydrophone Hydrophone Choose the desired sensor configuration with the rotary selector and confirm with ENTER.


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Figure 20: Connection selection Figure 21: Sensor selection

The welcome display will also show the current connection and sensor selection settings.

6.2 Loading and storing a trace (standard and pro version only)

Loading a trace Here you may reload a stored trace (up to ten traces may be stored) to re-analyse a measurement or to compare a stored measurement with a current one. Measuring parameters such as raw data and filter settings can be saved. Once the trace has been stored you can access the pipe selection menu by pressing the “enter” key and repeat do a new correlation using the stored pipe section data and filter settings. Storing a trace Up to ten correlation measurements with all data and a commentary of up to 32 characters may be stored in memory. To enter a commentary, confirm with ENTER, select the desired series of characters for your commentary field and press ESC to finish the commentary set-up.


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Then select the location (M1 to M10) where you would like to save the recorded trace. The status bar will show “data being saved”. As soon as this status message disappears you can continue operating the correlator.

Figure 22: Loading a measurement Figure 23: Storing a measurement

6.3 PC Communication (standard and pro version only)

PC communication allows you to transfer saved data via a serial interface cable to a MS Windows based PC. The PC software “Metrotech Correlation View” (standard accessory with versions “Standard“ and “Pro”) enables you to catalogue and print your measurements. First connect the correlator to your PC via the RS232 serial cable. Then set up the required port configurations for your PC. You will usually find all necessary menu options in the MS Windows “configuration” menu of your PC. Now select “data transfer” in the menu of your Metrotech Correlation View PC software. You are now asked to start the data transfer on the correlator. In the correlator main menu select “PC communication”. “Send” will appear on your correlator LCD. Confirm with ENTER. The correlator display will now show all traces one by one. At the same time a status bar will appear on the PC monitor. The transfer takes only a few seconds. The transferred data can be edited on the PC. The data will also remain stored in the correlator internal memory after the transfer.


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6.4 Velocity measurement

Especially when working with pipes of unknown material and characteristics, velocity measurements are essential for an exact correlation result. To measure the velocity an artificial leak has to be created either in or outside of a pipe section, e.g. above a hydrant. If the distance between the sensors and the leak is known, the correlator will then calculate the propagation velocity of the leak noise automatically. The sound propagation velocity determined by the correlator will then be used for the following leak noise correlation. Install both sensors at suitable measurement locations and open the artificial leak. In the velocity mesasurement menu of the correlator, choose select whether your sound source lies between the two sensors or outside the sensors. Enter the corresponding distances. Noise source outside of the sensors

Enter the distance between the two sensors and confirm with ENTER. The velocity measurement will start.

Noise source between the sensors Enter the distance from sensor A to the noise source as well as the total length between sensors A and B and confirm with ENTER. The velocity measurement will start. The appropriate field in the “pipe menu” will automatically be populated with the computed velocity value when the ENTER key is pressed.


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Figure 24: Velocity measurement

6.5 Leak pinpointing (only pro version)

Figure 25: Leak pinpointing

“Leak pinpointing” enables you to determine the precise location of leaks already pre-located by correlation. In this mode, the HL6000 is used as an acoustic single channel leak locator with one of the two sensors serving as a ground microphone. Since the approximate location of the leak has already been determined by the correlator, there is no need to survey the entire pipe path as required using a traditional ground microphone only.

The velocity is shown in ft/ s (or m/s)

The highest solid bar indicates the leak position.

The narrow bar indicates the temporary peak noise value at the active measurement location. The solid portion of the bar at the lower end indicates the constant minimum (leak) noise.


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Attach the sensor to the provided ground microphone adapter and plug the cable into the HL6000 control unit sensor jack. In the menu select “leak pinpointing” and confirm with ENTER. The correlator will automatically switch to the sensor direct input . The status bar indicates that ”leak pinpointing” has been selected. The headphones are muted at this point (the display will show a flashing loudspeaker icon with an X) to avoid unpleasant noises when placing the microphone. Place the microphone at the first measuring point on the pipe path and press ENTER. You can now hear the noise picked up by the sensor in the headphones. The headphone volume can be adjusted without affecting the noise level display on the control unit LCD. A vertical bar and a numerical value will appear on the LCD. The more narrow left portion of the bar indicates the current noise level, the more solid left portion shows the lowest constantly present noise level of the current measurement (minimum value). This minimum value is also represented as a numerical value below the bar. As it can be assumed that leaks will have a fairly constant noise (base level) and that all other interfering, unwanted noises will be superimposed, only the minimum noise level constantly present at a measurement location is relevant for locating the leak. The graphical and numerical minimum value indication obsolete the need for the operator to guess and remember the lowest level free of interfering noises (.e.g traffic noise). Watch the first measurement until the minimum leak noise portion and the numerical minimum value have settled at a constant value. Then press ENTER again and move the microphone about 3 ft further along the pipe path. Place the microphone on the ground and press ENTER again. The next bar will appear and the minimum value will be calculated again. Wait a until the minimum value has settled and then move the microphone again, etc. After storing several measurement values, analyse the graphical representation of the minimum values on the LCD. A clear distribution with the tallest minimum value (solid portion of each graph) in the center of the stored data indicates the exact leak position.

Normalizing ambient noise


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If there is a high background noise level (due to traffic, wind, etc) the base level display can be normalized to get optimal resolution. If you start measuring far from the assumed position of the leak, but still have a high base level, just press the ENTER key during measurement for longer than two seconds, The minimum value measured at this point will be subtracted from all following measurement. This gives you an enlarged display range - and therefore a better resolution - for the remaining portion of the pinpointing task.

6.6 Overview measurement

When doing pipe network surveys the overview measurement enables you to get a quick review of the connected pipe network section. The purpose of the overview measurement is not an exact calculation of the leak position but just to establish if a leak is identifiable or not. The procedure resembles that of the normal correlation except that only an approximate distance between the sensors needs to be entered. If the overview measurement shows a clear maximum then a standard, full scale correlation has to be done on this pipe section to locate the leak.

Figure 26: Overview measurement

The distance to the cursor position is not indicated during the overview

measurement. From the position of the correlation you can see whether the leak is closer to transmitter A or B.


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6.7 Correlation type

Available selections are correlation (or cross correlation) and auto correlation. Always select the standard correlation mode using two sensors. This correlation type provides the best results in normal correlation situations. For leak locating on pipes with only one connection point (e.g. dead ends), you may still be able to perform a correlation using the autocorrelation mode. If the leak is located between the sensor and the dead end of the pipe, the sensor will pick up the leak noise directly and as a delayed signal resulting from the reflection at the pipe end. This “echo” also allows the correlator to determine the leak position in the autocorrelation mode.

Figure 27: Autocorrelation Figure 28: Autocorr. display


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7 Configurations

Figure 29: System configuration The following options are available from the configurations menu:

o Beep: On/Off o Auto power-off after: Time delay (minutes) o Auto backlight off after: Time delay (seconds) o Switch dimension units: Metric / Imperial o Date and time: Set date and time o Automatic filter selection: On / Off

HL6000 control unit set up

Filter settings


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7.1 Beep

The keypad tone can be switched on and off.

7.2 Automatic power-off

Select the time delay for the correlator to automatically switch off. Select “0“ to disable the automatic power-off function.

7.3 Illumination

Select the backlight auto-off time delay. The duration is computed from the time of the last keystroke. Set the delay time to “0” to disable the automatic backlight off feature.

7.4 Dimension units

The correlator data input and results can be set to imperial or metric system.

7.5 Time and date

This submenu serves to update the correlator system date and time settings. The current system date and time information is displayed on the welcome screen. It will also be stored with stored correlation traces.

7.6 Filter

You may choose between manual and automatic filter selection. Use automatic filter selection for normal measurement conditions. For mixed material pipe sections, the automatic filter selection mode switches to the maximum filter bandwidth.


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8 Power Supply

8.1 Load

The HL6000 power supply allows to charge the control unit and both transmitters simultaneously. You can also operate the HL6000 control from mains or 12VDC while or while the charging process is in progress.


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9 Technical Data

9.1 HL6000 correlator control unit.

Processor RISC Processor for user interface DSP Processor for signal processing Display 320x240 Pixel, ¼-VGA monochrome, backlit Data input Rotary knob with enter function Storage capacity 10 traces (including comments) Power supply internal NiMH rechargeable battery; external 12 V

DC (vehicle adapter) or 110 V AC and 230 V AC Operation time / Charging time >18h / < 3 h Interfaces RS232 (data transfer to PC, printing from PC,

software updates) Connections Sensor / hydrophone direct input jack,

Antenna jack, headphones/ charging jack

Protection class IP 67 Operation temperature -20°C to +50°C Dimensions/weight 270 x 130 x 240 mm / 3.3 kg

9.2 Transmitter A and B

Display LCD, 2 x 16 characters, backlit Status indicators Battery status, noise level, unit status Membrane keys On/Off/Backlight, Radio On/Off, Auto/Man, Volume


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Radio frequency 433 MHz Transmitter power 500 mW

Note: For operation please follow the radio transmission regulations of your country’s authorities.

Operation time / Charging time >15 h / < 3 h Power supply internal Akku NiMH; external 12 V DC (vehicle

adapter) or 230 V AC Interfaces Sensor / hydrophon jack, Antenna, headphones /

charge, Protection class IP 67 in operation Operation temperature -20°C to +50°C Dimensions/Weight 230 x 110 x 190 mm / 2.3 kg

9.3 Sensors PAM CORR

Sensors Piezo sensor with active amplifier Connecting cable Highly flexible silicon cable Adapter Magnetic adapter Operation temperature -20°C to +50°C Dimensions/weight: 90 x 78 mm / 0.4 kg


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COPYRIGHT NOTICE

The information contained in this document is for informational purposes only and is subject to change without notice. Metrotech Corporation makes no warranty of any kind with regard to the information contained in this manual, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Metrotech shall not be liable for errors contained herein, nor for incidental or consequential damages from the furnishing of this information. This manual contains proprietary information that is protected by copyright. All rights are reserved. No part of this manual may be photocopied, reproduced, magnetically or electronically stored, transmitted, or translated into another language without the prior written consent of Metrotech Corporation. © Metrotech Corporation 2003

DISCLAIMER When hooking to live power via an inductive clamp, be certain clamp is connected around power line, not directly onto the power line. Please follow your own company’s safety standards, and OSHA requirements.

WARRANTY THERE ARE NO WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY, BEYOND THOSE STATED HEREIN. Metrotech warrants its equipment to be free from defects in workmanship and material under normal and proper use and service for one year from date of purchase by original user. Metrotech assumes no obligation to repair or replace equipment which has been altered or repaired by other than a Metrotech-approved procedure, been subject to misuse, misapplication, improper maintenance, negligence, or accident; has had its serial number or any part thereof altered, defaced or removed; or been used with parts other than those approved by Metrotech. Warranty does not include batteries. Expendable items such as fuses and lamps are excluded. Any detection product proved defective under this warranty will be repaired or replaced free of charge at the Metrotech Corporation factory or approved Metrotech repair station. The equipment should be returned to our factory by prepaid transportation after requesting and receiving return authorization from our Customer Service Department. Metrotech’s obligations are limited to repair or replacement of broken or defective parts which have not been abused, misused, altered, or accidentally damaged, or at the option of Metrotech, to refund of the purchase price. Metrotech assumes no liability for removal or installation costs, consequential damages, or contingent expenses of any other nature. Part # 10791 Revision B

Documents

HL6000 manual - first draft 061703...the transmitter signal level be manually adjusted using the arrow keys in Man mode. The transmitter LCD has and Auto/Man indicator. Operating Manual