TM-9-2920-257-30&P Maintenance and Parts Manual for 200 Amp M113 Generator Download
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TM 9-2920-257-30&P Turn the calibrate knob to increase reading on the tachometer to value determined by e (speed of test generator) in above formula. Increase or reduce test stand speed with vari-drive control until tachometer indicates desired test speed (2,000 RPM). In the formula below, the 3-inch pulley on the test generator will be turning 2,666 RPM when the test stand tachometer indicates 2,000 RPM. 2000 X 4 = 8000 = 2666 RPM 3 E-3. BASE SETTING FOR UMC SWITCHES AND CONTROLS (Part NO 7458 and 7458-2) CAUTION Make certain all test stand switches and controls are in positions listed below before testing to prevent damage to test stand or component by application of excessive power. The base setting for UMC controls and switches: a. DC load ammeter range switch b. DC field ammeter range switch c. Millivoltmeter (1) Range switch (2) Millivoltmeter (press to read switch) d. DC voltmeter (1) Range switch (2) Select switch e. Tachometer (1) Select switch (2) Pulley calibration knob f. AC ammeter (1) Range switch (2) Select. switch g. AC voltmeter (1) Range switch (2) Select switch h. External field exciter switch (AC system) X 10 X 6 . X 10 OFF X5 RECT/GEN DIRECT DRIVE COUNTERCLOCKWISE X2 T1 X2 T1 - T2 OFF E-2