ARMY TM 9-6115-670-14&P
4-145
4.57. ELECTRICAL METERS.
This task covers:
a. Test
b. Replace
INITIAL SETUP
Tools
General Mechanic's Tool Kit
(Item 1, Appendix B)
Multi-meter
Equipment Conditions
APU control unit disconnected from shelter
(refer to system TM).
Materials/Parts
AC VOLT Meter
AC AMP Meter
HERTZ Meter
DC AMP Meter
TEST
AC VOLTAGE METER
a. Refer to FO-1 (SICPS/WIN-T), or FO-7 (JTACS), and disconnect plug J2 from P2.
b. Remove electrical leads from meter by performing steps “a.”, “b.”, and “c.” of REPLACE procedure.
c. Measure resistance on terminals at rear of meter. Resistance reading should be 69.0 ohms +/- 5
ohms.
d. If meter reading is not within the specified resistance, replace meter.
AC AMPERES METER (MOTOR LOAD CURRENT)
a. Refer to FO-1 (SICPS/WIN-T), or FO-7 (JTACS), and disconnect plug J2 from P2.
b. Remove electrical leads from meter by performing steps “a.”, “b.”, and “c.” of REPLACE procedure.
c. Measure resistance on terminals at rear of meter. Resistance reading should be 0.1 ohms.
d. If meter reading is not within the specified resistance, replace meter.
