TM 10-1670-305-23&P
ELECTRONIC TEST CHAMBER ASSEMBLY, MODEL 453
0025 00
DIRECT SUPPORT MAINTENANCE
ALTITUDE ACCURACY VERIFICATION
7. After altitude stabilizes and ALTITUDE DWELL indicator stops flashing, observe and record
altitude as observed on test chamber ALTITUDE (FT MSL) indicator.
8. Repeat step (6) and (7) for each table value.
9. All readings shall be within tolerances listed in Table 1. If not, see Zero Altitude Adjustment.
TABLE 1. ALTITUDE ERROR TOLERANCES
Standard Instrument
Tolerance
Altitude (Feet)
(Feet)
0
30
1,000
35
2,000
40
3,000
45
5,000
50
8,000
60
10,000
65
12,000
70
15,000
80
18,000
90
20,000
95
25,000
105
35,000
125
10. Disconnect the entire test setup and prepare test chamber for movement (WP 0023 00)
0025 00-3
Change 1
