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ELECTRONIC TEST CHAMBER ASSEMBLY, MODEL 453 DIRECT SUPPORT MAINTENANCE CONT.
ZERO ALTITUDE ADJUSTMENT

TM-10-1670-305-23P Automatic Ripcord Release AR2 Model 451 NSN 1670-01-369-7914 Test Chanber Assembly AR2 Model 452 NSN 1670-01-370-0752 Manual
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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







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