HFX datasheet(13/36 Pages) RMT

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OPERATING MANUAL. HFX SERIES

Page 13 of 36

Checking of the Figure-of-Merit requires a special device – Z-Meter.

DX8140 Datalogger. It has a special function of Figure-of-Merit checking.

Contact RMT for the devices and checking. And visit RMT website for more

literature on checking of Figure-of-Merit of thermoelectric modules -

http://rmtltd.ru/technology/publications/.

The specification of every Sensor contains Z measured at vendor factory

before shipment.

5.3 Checking of Sensor behavior

Connect the Sensor to a voltmeter (resolution preferably in the 0.1mV

range). Place the Sensor on a metallic surface at room temperature. When

touching the Sensor with a warm finger on the upper surface, you should

get a signal in the mV range.

A Sensor signal below 0.1 mV indicates a short circuit. Check whether the

resistance of the Sensor is > 0.1 ohm as described above.

If the signal randomly fluctuates between a positive and negative signal, or

the voltage is in the +/- 1 V range, you may have an open circuit. Check the

connection of your electrical probes.

If the signal shows one of the three described features above, the Sensor is

not functional and has to be replaced.

In this case, please contact the vendor.

HFX датащи(PDF) 13 Page - RMT Ltd.