TM 10-1670-305-23&P
0010 00-8
ELECTRONIC TEST CHAMBER ASSEMBLY, MODEL 453
0010 00
OPERATION UNDER USUAL CONDITIONS - CONT
CONTROL INTERLOCKS TEST
This is an optional test to verify correct function of switches and indicators.
1. Set AR2 altitude dial to 1,000 feet and install AR2 in altitude chamber.
2. If DISPLAYS LOCKED indicator (18) is illuminated, press RESET DISPLAYS switch (17).
3. If CHAMBER VENTED indicator (16) is illuminated, press DUMP switch (15).
4. Press and hold HOLD DOWN TO SET switch (13); use SET ALTITUDE control (4) to set
altitude to 3000 100 feet as observed on ALTITUDE (FT MSL) display (20); release HOLD
DOWN TO SET switch.
5. Press and hold HOLD DOWN TO SET switch (13); use SET FALL RATE control (5) to
achieve fall rate of 100 10 ft/sec as observed on FALL RATE (FT/SEC) display (19);
Release HOLD DOWN TO SET switch.
6. Press GO TO ALT AND DWELL switch. Before ALTITUDE DWELL indicator (6) stops
flashing, set AR2 JUMP/OFF switch to JUMP; press FALL switch (9).
7. The test chamber shall not indicate a fall.
8. Wait until ALTITUDE DWELL indicator (6) stops flashing, Set AR2 JUMP/OFF switch to OFF.
Press FALL switch (9).
9. The test chamber shall not indicate a fall.
10. Set AR2 JUMP/OFF switch to JUMP. Press FALL switch (9).
11. The test chamber will indicate a fall and the AR2 will actuate. The DISPLAYS LOCKED
indicator (18) will illuminate. Press RESET DISPLAYS switch (17).
12. The display shall not reset; DISPLAYS LOCKED indicator (18) shall remain illuminated.
13. Press HOLD DOWN TO COCK switch (10).
14. The AR2 shall not cock.
15. Set AR2 JUMP/OFF switch to intermediate position (neither JUMP SWITCH indicator lit).
Press HOLD DOWN TO COCK switch (10).
16. The AR2 shall not cock.
17. Set AR2 JUMP/OFF switch to OFF. Press and hold HOLD DOWN TO COCK switch (10).
18. AR2 shall cock. Release HOLD DOWN TO COCK switch.
