28142 Rev 15 POWER OUTPUT EVALUATION
Gentherm Global Power Technologies Page 39
Figure 21 – V
set
vs Time After Ignition, Example
V
set
After TEG has Stabilized
Once the TEG has been running for 60-90 minutes, the power unit will be up to operating
temperature. Follow these steps to check V
set
:
Consult the Data Plate inside TEG door for the reference V
set
voltage and determine
the required V
set
for the present ambient temperature.
Move the jumper clip on the terminal block TB-1 to the SETUP position, i.e. between
terminals 2 and 3. This connects the TEG to an internal load required for V
set
. See
Figure 13 or Figure 14.
Connect a voltmeter between terminals 2 (+) and 4 (-). The measured V
set
and should
match the required V
set
for the present temperature.
CAUTION!
Do not allow the measured V
set
to exceed the required
V
set
. Overheating will result and may cause irreparable
damage to the power unit.
Wait approximately 10-45 minutes, and when the measured voltage is stable,
compare it to required V
set
. Measured V
set
should be within 0.2 V of the required V
set
.
NOTE:
Waiting
is necessary to allow the TEG voltage to stabilize to the new load
conditions. (Changing from customer load to the on-board 1-ohm resistor).
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