1.9 Connecting components
ITC500 / page 26
13
15
14
-
7
5
6
+
9
2
Figure 8 Connecting a TEC
Attention
A TEC element connected with wrong polarity may lead to thermal
runaway and destruction of the connected components.
1.9.6.1 Polarity check of the TEC element
• Connect TEC element and temperature sensor. The sensor must have good
thermal contact to the active surface of the TEC element.
• Switch on the ITC5xx.
Now follow the steps described in chapter 1.8, “Pre-settings” on page 16
• Select the display T
SET
and select a suitable temperature (resistance).
• Select the display T
ACT.
• Switch on the output (press TEC ON) and observe the actual temperature
(resistance).
If the temperature T
ACT
is continually running away from T
SET
the TEC element is
reverse connected. Change the polarity and repeat the procedure.
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