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04.10.2021
20210927 QC-PC-PID-01-Bedienungsanleitung engl.
Correct polarity of the Peltier element
In order for the controller to work, it is important to connect the Peltier element correctly. If the
Polarity of Peltier element is incorrect, uncontrollable high or low temperatures will occur during
operation.
Quick Ohm Peltier elements have their electrical
connections on the passive side (also called "hot
side") of the Peltier element. If the connecting
wires face towards the user with the red wire to the
right, the active side (also called "cold side") is at
the top. Quick-Ohm peltier elements have their
i
mprint on the “cold side”.
The object to be
tempered must be thermally coupled to the cold
side. The other side must be thermally coupled to a
heat sink. If a voltage is applied to the connections, the cold side becomes cold when the voltage on
the red line is electrically positive compared to the voltage on the black line. For modules other than
Quick Ohm peltier elements, it is recommended to check the polarity. Depending on their
description, these modules might have to be connected the other way round.
Caution:
A Peltier element may only be supplied with electricity if it is in thermal contact with a
sufficiently large heat sink, where heat can be dissipated. Areas that remain free and thus have no
possibility to dissipate thermal power can overheat in a few seconds.
