thermo-hygrograph

ACM - 52301-ST-5Models:

TECHNOCRACY PVT. LTD.

Thermo Hygrograph

Thermo Hygrograph

Product Overview:

A Thermo-Hygrograph is a chart recorder that

measures and records both temperature

andhumidity (or dew point). Similar devices that

record only one parameter are a thermograph

for temperature and hygrograph for humidity.

Weiber thermograph is usually with a pen that

records temperature on a revolving cylinder. The

pen is at the end of a lever that is controlled by a

bi-metal strip of temperature-sensitive metal

which bends as the temperature changes. Our

Weiber Thermo hygrographs are used to

produce a continuous record of the variation of

both the temperature and relative humidity of

the atmosphere against time, by drawing

colored traces on a chart.

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Thermo Hygrograph

Variations in relative humidity can affect many

manufacturing processes, storage of raw

materials, weights of items such as wool, paper,

tobacco, confectionery, and computer

operation, as well as being an important factor

in human comfort. Since temperature is often

linked to changes in relative humidity, this

instrument records both on a single chart.

PRINCIPLE OF OPERATION

Humidity Measurement

The element that senses relative humidity is

made from several strands of specially treated

human hair, which shorten as relative humidity

decreases and lengthen as it increases. The

relative humidity element is connected through

a linkage to the pen arm so that changes are


recorded as an ink line on the chart. The linkage

is designed to give a near linear movement over

most of the chart range.

Temperature Measurement

The temperature element is a bi-metal coil that

expands and contracts with changes in

temperature, causing its free end to move. The

free end is connected via a spindle to the pen

arm so that changes are recorded on the chart.

General

Relative humidity and temperature are recorded

on the same chart, so to distinguish between the

two traces, the temperature pen is red while the

relative humidity pen is black. To allow the pens

to pass each other without colliding, the black

relative humidity arm is shorter than the

Thermo Hygrograph

temperature arm, so that the two traces are

displaced in time with respect to each other.

Fibre tipped pens are supplied which contain

sufficient ink in the body to write for

approximately 9 months. Replace the pen when

the trace grows too faint to read.

Relative humidity is always scaled from 0 -

100%.

is 50 deluxe The temperature span for the

THERMOHYGROGRAPH oC, and this can be set o oto cover two alternative ranges: -20 C to +80 C

o oor 0 C to+50 C .

When the instrument is dispatched, a special

chart is fitted that gives instructions for changing

the temperature offset to match the range of the

chart selected. The unit is factory calibrated for o o20 C to +80 C


Long-term continuous record

Due to a long folding chart, a maximum of 6

months continuous recording is possible. Thanks

to a chart with 100mm recording width, a

reading of 1 Celsius scale, 1%RH is possible.

Moreover, according to the control conditions,

the switching of the recording range is possible.

Sensor extension

The sensor extension, possible with a cable

(separate), allows remote measurements of

unmanned places or thermostat external

monitors.

Alarm function (option)

With the connection to the warning signal

equipment, it informs abnormal value of the

temperature and the humidity.

Thermo Hygrograph

Range of long-term stability, wide measurement

_ Due to the superiority of the sensor's response,

stability, high precision and long-term stability oresults can be obtained on a wide range of 20 C

oto +80 C degrees Celsius.

Digital display

_ With a large and eye-friendly digital display,

the current value is readable at a glance.

Other

Easy users' calibration. 2-point humidity

calibration possible. Battery drive type for free

portability. Wall hanging possible.

Folding charts for free cutting-offs.


ELECTRONIC HYGROTHERMOGRAPH ST-50

Metering display part

Metering system Temperature/Semi-conductor system, Humidity/macromolecule electric capacity system

Metering Range Temperature / -20-80 degrees Celsuis Humidity /0-100% RH

Metering Display Temperature (Fahrenheit or Celsuis), relative humidity,contents dew-point temperature, absolute humidity

Recording Part

Recording System Cartridge pen (red, blue)Folding charts (entire length 12 m,effective recording width 100 mm)

Overall accuracy Temperature / ± 1 degree Celsius Humidity / ±3% RH

Recording Period and battery life

Transport speed 200mm/h 100mm/h 5mm/h 2.5mm/hRecording Period 20 days 1.5months 3 months 6 monthsBattery life 20 days 1.5months . months 6 months

In sleep mode with 2.5mm//h, the battery life is 6 months

Power Source 4 alkaline size D batteries or an adapterEnvironment Temperature/-20-50 degrees Celsius, Humidity/20-90% RH (non condensing)Dimension/weight 300(W)x245(H)x105 (D)mm, approx, 2.8kg

Accuracy differs according to temperature.

Functions

Sensor Extension With a separately sold extension cable (50m max.)

Alarm relay output With the separately sold relay unit (2 points high and low temperature & humidity)

Sensor Calibration Temperature 1 Point, Humidity 1 Point or 2 points

Recording range Conversion to 0-50 recording rangesetting Discretional setting of central temperature

Conversion to ±25 degrees Celsius, ±10 degrees Celsius range width

Marketing Superposition marking on temperature recodes

Main Specifications

TECHNOLOGY with HUMAN TOUCH

TECHNOLOGY with HUMAN TOUCH


We are having Representatives in 55 Countries

please visit our

International Dealers Section

to contact your nearest ACMAS Representative


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thermo-hygrograph