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TM 1-6625-736-13&P
(b)
Test the infrared light
(1)
Ensure DAU power is OFF. Connect the UTD to the DAU.
(2)
Disconnect UTD cable from Electronic Test Set and reconnect to UTD.
WARNING
The UTD infrared light gets extremely hot with prolonged use. Personal injury and lamp bum
out can occur if the lamp 18 left on too long a time. Limit continuous lamp operation to 60
seconds or less.
(3)
Turn DAU power ON. Position TRACKER MODE test switch to TEST. Ensure the infrared lamp
illuminates. If the lamp fails to work refer to TM 1-6625-724-13&P for repair or troubleshooting
procedures. Turn the TRACKER MODE switch to DAY mode, turn DAU power OFF and allow the
lamp to cool for a few seconds before proceeding.
(c)
Ensure the UTD registers a measurement.
NOTE
Failure to position the UTD properly on the Electronic Test Set will result in a measurement
error. No data will be taken and can lead to erroneous conclusions. If no data is obtained
during the test, dean the UTD dear lens with a lint free cloth, reposition the UTD on the test
set, hold in place and retest.
(1)
Position the UTD on the Electronic Test Set so the lens assembly on the UTD sits into the lens
assembly of the test set. Make sure the direction of rotation arrow on the UTD matches the direction
of rotation arrow on the Electronic Test Set.
(2)
Position the TRACKER MODE selection switch to NIGHT.
(3)
On the Electronic Test Set, position the ACTIVE/PASSIVE switch to ACTIVE.
(4)
Select Flight Plan and press DO. Select CAL and press DO. Next select OPRCHK and press DO.
Then press F1.
NOTE
For instructions on how to take a measurement using the CADU refer to TM 1-6625-724-13&P.
2-14 Change 1
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