TM-9-2350-261-20-1 Unit Maintenance Manual Volume 1 M113A2 M577A2 M1064 M1068 M1059 M901A1 Download
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TM 9-2350-261-20-1 STE/ICE-R TEST 90 DC CURRENT 0 TO 1500 AMP 0118 00 THIS WORK PACKAGE COVERS: Test (page 0118 00-1). INITIAL SETUP: M a i n t e n a n c e L e v e l Unit T o o l s a n d S p e c i a l T o o l s STE/ICE-R Test Set (WP 0780 00, Item 73) P e r s o n n e l R e q u i r e d Unit Mechanic E q u i p m e n t C o n d i t i o n Engine stopped (see your -10) Carrier blocked (see your -10) STE/ICE-R power hooked up (WP 0106 00) STE/ICE-R starter circuit test hooked up (WP 0108 00) TEST NOTE If current probe is below room temperature, wait at least 5 minutes after connecting probe to VTM before doing offset test, or perform offset within 30 seconds of starting each measurement. 1. Perform offset test. a. Set TEST select switches to 90. b. Push and hold TEST button until CAL appears. Release TEST button. c. If VTM reads between −225 and +225, offset test passes. d. If offset test fails, see TM 9-4910-571-12&P. 2. Press and release TEST button. 3. Turn on circuit used to condition current probe. If starter is used to condition probe, energize starter long enough to obtain a reading. Do not allow engine to start. 4. Note polarity sign of conditioning current. If readout is negative (−), reverse current probe, and repeat 5. Turn off circuit used to condition current probe. 6. Perform offset test. NOTE Stray magnetic fields can affect the current reading. Such fields may exist within a foot or so of operating carrier generators and alternators, motor generators under load, and electric motors. Keep current probe at least one foot away from any operating generators, alternators, or electric motors. 7. During offset test, the component being tested must be off, and the circuit must be de-energized. a. Turn off component to be tested. b. Install current probe where current is to be measured. c. Push and hold TEST button until CAL appears. Release TEST button. d. If VTM reads between −225 and +225, offset test passes. e. If offset test fails, see TM 9-4910-571-12&P. 8. Press and release TEST button. 9. Turn on component to be tested. 0118 00-1 Steps 1 - 4.