HTX datasheet(22/36 Pages) RMT

22 / 36 page

THERMOELECTRIC HEAT FLUX SENSORS

Page 22 of 36

performance parameters which are temperature sensitive. Temperature

dependences of the parameters are given in the Sensor Specifications.

Selecting a suitable Ohmmeter it is necessary to take into account the

following:

Operating current of the measurement must be low to prevent self-

heating of the Pt1000 thermistor. The self-heating of the

thermistor distorts results of heat flux measurements by the

Sensor.

We recommend using Ohmmeter with operating current less than

10 A.

Resolution of the Ohmmeter must be enough for accurate

temperature measurements.

The Pt1000 thermistor has 0.375%/K temperature dependence.

Thus to measure average temperature with accuracy 0.5 °C, you

need Ohmmeter resolution at least 0.1 Ohm.

We recommend using Ohmmeter with resolution of 0.01 Ohm.

7.4 Third party read-out device

A data logger is highly recommended for the measurement of time-

dependent variations of the Sensor signal. For the choice of a suitable

device, apply the same considerations as for the voltmeter.

Applicability

Third party read-out devices are compatible with all the HTX Heat Flux

Sensors without a plug.

HTX Datasheet(PDF) 22 Page - RMT Ltd.