TM 10-1670-305-23&P
0010 00-11
ELECTRONIC TEST CHAMBER ASSEMBLY, MODEL 453
0010 00
OPERATION UNDER USUAL CONDITIONS
OPERATING PROCEDURE
RATE THRESHOLD (ALL FIRE) TEST
1. Install AR2 in test chamber.
2. After test chamber warm-up, ensure DISPLAYS LOCKED indicator (18) and CHAMBER
VENTED indicator (16) are extinguished. If not, press RESET DISPLAYS switch (17).
3. Set AR2 altitude dial to 5500 feet. Close altitude chamber lid (2).
4. Press and hold HOLD DOWN TO SET switch (13) and use SET ALTITUDE control (4) to set
Test Chamber altitude to 7500 100 feet. Release HOLD DOWN TO SET switch (13).
5. Press and hold HOLD DOWN TO SET switch (13) and use SET FALL RATE control (5) to set
fall rate at 87.5 0.5 ft/sec. Release HOLD DOWN TO SET switch (13).
6. If ALTITUDE DWELL indicator (6) is not illuminated or flashing, press GO TO ALT AND
DWELL switch (7). Wait until ALTITUDE DWELL indicator (6) stops flashing.
7. Set AR2 JUMP/OFF switch to JUMP. Press FALL switch (9).
8. The AR2 shall actuate within 300 feet of AR2 dial setting.
9. Set AR2 JUMP/OFF switch to OFF, press HOLD DOWN TO COCK switch (10), and observe
movement of piston rod to right until AR2 cocks.
10. If required, repeat steps 2 through 9.
11. If no other tests are to be performed, follow shut down after testing procedures at end of this
work package.
RATE THRESHOLD (NO FIRE) TEST
1. Ensure DISPLAYS LOCKED and CHAMBER VENTED indicators (16, 18) are extinguished.
If not, press RESET DISPLAYS switch (17).
2. Set AR2 altitude dial to 5500 feet. Close altitude chamber lid (2).
3. Press and hold HOLD DOWN TO SET switch (13) and set Test Chamber altitude to 7500
100 feet. Release HOLD DOWN TO SET switch (13).
4. Press and hold HOLD DOWN TO SET switch (13) and set fall rate at 62.5 0.5 ft/sec.
Release HOLD DOWN TO SET switch (13).
5. If ALTITUDE DWELL indicator (6) is not illuminated or flashing, press GO TO ALT AND
DWELL switch (7). Wait until ALTITUDE DWELL indicator (6) stops flashing.
6. Set AR2 JUMP/OFF switch to JUMP. Press FALL switch (9). Wait until the altitude as
observed on the ALTITUDE (FT MSL) display (20) reaches 4500 feet.
