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d)
Wait for the TEG to reach operating temperature and a stable voltage measure-
ment between terminal 2 and 4, 15 minutes maybe sufficient if the TEG was
already warm. Allow 1 hour if the TEG was just started from cold.
e)
Measure V
f)
While observing the voltmeter display remove the jumper clip, creating an open
circuit condition, and note the momentary voltage. On a digital multi-meter this
will be the first number displayed after removing the clip, within 2 seconds of
removing the clip. Record the number as the momentary open circuit voltage
(V
). If this was not recorded quickly enough replace the jumper clip and repeat
oc
steps d) to g) above.
Note: When the jumper clip is suddenly removed the measured voltage leaps up to
a value, known as the momentary open circuit voltage (V
continues to climb.
WARNING: Do not allow V
Gentherm Global Power Technologies
5220
with the voltmeter connected between terminals 2 and 4 and record.
set
be damaged.
Figure 30 Momentary Open Circuit Diagram
to exceed two seconds otherwise the TEG can
oc
28142 Rev. 14
). Measured voltage
oc
10-10
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