TM 10-1670-305-23&P
TEST CHAMBER ASSEMBLY, MODEL 452
0009 00
OPERATION UNDER USUAL CONDITIONS - CONT
OPERATING PROCEDURE – CONT
9. Rotate altitude chamber switch lever (2) on test chamber counterclockwise 180. This will put
the AR2 JUMP/OFF switch in JUMP position.
NOTE
AR2 functional test requirements are summarized in the following table.
AR2 FUNCTIONAL TESTS
RATE OF FALL
TYPE OF TEST
AR2 DIAL
SETTING
RATE OF FALL
ALTITUDE AT
WHICH
MEASURED
ACTUATION
ALTITUDE
TOLERANCE
Rate of fall
Mechanism
Verification:
Fire Test
5,500 ft
85/90 fps
6,000/5,000 ft
300 ft
No Fire Test
5,500 ft
60/65 fps
6,000/5,000 ft
No fire
No Fire Test
10,500 ft
60/65 fps
11,000/10,000 ft
No fire
Altitude
Actuation
Verification:
Fire Test
3,000 ft
100/120 fps
3,500/2,500 ft
300 ft
Fire Test
8,000 ft
100/120 fps
8,500/7,500 ft
300 ft
Fire Test
15,000 ft
100/120 fps
15,500/14,500 ft
500 ft
Fire Test
Required
Actuation
Altitude, MSL*
100/120 fps
Required Actuation
Altitude 500 ft
300 ft or
500 ft
* See step 15.
10. Move the test chamber CLIMB/FALL/COCK switch (8) to FALL position. As altitude
decreases, as observed on the test chamber altimeter (4), check for the altitude at which the
AR2 actuates. Actuation of the AR2 should occur a 5,500 feet 300 feet. Testing under the
conditions described in step 8 constitutes a fire test for the rate of fall mechanism verification.
NOTE
It is not necessary to dump the altitude test chamber if a retest at the same
altitude is desired.
11. After actuation, if a retest is desired, proceed as follows:
CAUTION
To avoid damage to the AR2 under test, never rotate altitude chamber switch
lever with the CLIMB/FALL/COCK switch in the cock position.
Change 1
0009 00-8
