HFX datasheet(10/36 Pages) RMT

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THERMOELECTRIC HEAT FLUX SENSORS

Page 10 of 36

Ensure that the mounting surface is flat, dry, and free of dust and grease.

Clean the Sensor surface with ethanol or isopropanol. Do not use acids or

alkali for cleaning the Sensor. Mount the Sensor using a mounting

substance. A detailed description of the Sensor mounting is given in

Chapter 6.

3.6 Data acquisition

Connect the Sensor to the read-out devices and collect data according to

the data acquisition procedure.

3.7 How to calculate heat flux

Every Heat Flux Sensor has performance parameter – sensitivity to heat

flux (Sa and Se). The data acquisition device collects voltage output from

the Sensor U.

The heat flux P must be calculated as

�� =

��

�� × ��(��)

(4.1)

Where Si – sensitivity: if Si=Se, P will be outputted in the units of heat

flux density [W/m

2]; if Si=Sa, the integral heat flux will be obtained in

[W]; F(T) – temperature correction factor, dependence of sensitivity

on working temperature T.

3.8 Sensors service

The service procedures and procedures of removing the Sensors from the

setup are described in Chapter 11.

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