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MESSTEC Power Converter GmbH
Operating Manual
TEC Controller
Document: 10100920OM
Revision: 1.1
Date: 10.10.2019
Page 48/71
Supplemantary detailed information:
The relationship between the setpoint temperature and the HW-Setpoint-Voltage is:
𝜗 = {
𝜗
𝑀𝐴𝑋
− 𝜗
𝑀𝐼𝑁
5,0
∗ 𝑈
𝐻𝑊−𝑆𝐸𝑇𝑃𝑂𝐼𝑁𝑇
} + 𝜗
𝑀𝐼𝑁
and accordingly:
𝑈
𝐻𝑊−𝑆𝐸𝑇𝑃𝑂𝐼𝑁𝑇
=
5,0
𝜗
𝑀𝐴𝑋
− 𝜗
𝑀𝐼𝑁
∗ {𝜗 − 𝜗
𝑀𝐼𝑁
}
For purpose of illustration, the basic transfer function is also shown in figu-
re 31 (dashed red line). It is apparent, that the slope of the transfer function
has changed, it is transformed to the actual min. and max. temperature
values.
Advantage:
The usable adjustment range (potentiometer or voltage source)
is always the full range (0 V to 5 V).
Disadvantage: The relationship between input voltage and temperature
setpoint is dependent on min. and max temperature settings.