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