TM 55-1520-240-23-7
8-2
TEST POWER TURBINE INLET TEMPERATURE (PTIT) INDICATOR
(Continued)
8-2
POSITION ERROR TEST
11.
Adjust tester (2) cause indicator (1) to read 600ºC
with indicator dial in normal (vertical) position.
12.
Rotate indicator (1) 90º counterclockwise. Tap
indicator and record reading. Return indicator to
original position.
13.
Rotate indicator (1) 90º clockwise. Tap indicator
and record reading. Return indicator to original
position.
14.
Rotate indicator up (dial in horizontal position).
Tap indicator and record reading. Return
indicator to original position.
15.
Compare readings from steps 11, 12, 13, and 14.
Difference shall not be more than 24ºC.
GROUNDED THERMOCOUPLE TEST
16.
Adjust tester (2) to 800ºC. Check indicator.
Indicator (1) shall read 795ºC to 805ºC. Record
indicator reading.
17.
Ground tester (2) chromel lead (4) to indicator (1)
case. Check indicator. Indicator shall not read
more than 5ºC from reading in step 16.
18.
Remove ground from chromel lead.
19.
Repeat steps 17 and 18, grounding tester alumel
lead (5) to indicator (1) case. Check indicator.
Indicator shall not read more than ±5ºC from
reading in step 16.
8-18
