TM 55-1520-240-23-7
8-38
TEST BAROMETRIC ALTIMETER
(Continued)
8-38
14.
Rotate adjustment knob (3) of test altimeter
(6) and altimeter being tested to bring both
barometric scales to 29.92. Record altitude
reading.
15.
Adjust test set to altitude test points.
Readings shall be within tolerance listed (TM
55-4920-231-14).
INSPECT
16.
Adjust test set (2) to cause altimeter to return to
altitude recorded in step 14.
17.
Shut down test set (TM 55-4920-231-14).
18.
Shut down power supply.
19.
Disconnect altimeter (1) from test setup.
ALTITUDE TEST POINT (FEET)
ALTIMETER READING (FEET)
0
-30 to 30
500
465 to 535
1,000
965 to 1,035
1,500
1,460 to 1,540
2,000
1,960 to 2,040
3,000
2,955 to 3,045
4,000
3,950 to 4,050
6,000
5,940 to 6,060
8,000
7,930 to 8,070
10,000
9,920 to 10,080
12,000
11,910 to 12,090
14,000
13,900 to 14,100
16,000
15,890 to 16,110
18,000
17,880 to 18,120
20,000
19,870 to 20,130
FOLLOW-ON MAINTENANCE:
None
END OF TASK
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