TM 55-1520-240-23-10
12-2
TEST CENTER WINDSHIELD ANTI-FOGGING ELEMENT
(Continued)
12-2
PILOTS OR COPILOTS WINDSHIELD SENSING
ELEMENT
NOTE
Sensing element is embedded in
windshield.
Windshield must not be in direct sun
when reading temperature on FAT
thermometer.
Procedure is same to test pilots or
copilots windshield. Pilots windshield
is shown here.
7.
Remove screw (1), lockwasher (2), and flat
washer (3) from terminal (10). Disconnect wire
(11).
8.
Measure resistance between terminals (10 and
12). Resistance shall be as below for windshield
temperature.
If Temperature is:
Resistance
Shall Be:
(ohms)
31º to 40ºC (87º to 104ºF)
318-340
21º to 30ºC (69º to 86ºF)
305-330
11º to 20ºC (51º to 68ºF)
289-321
1º to 10ºC (33º to 50ºF)
275-310
-9º to 0ºC (15º to 32ºF)
259-301
-19º to -10ºC (-3º to 14ºF)
245-290
-29º to -20ºC (-21º to -4ºF)
228-282
9.
Connect wire (11) to terminal (10). Install flat
washer (3), lockwasher (2), and screw (1).
12-8