ARMY TM 9-6115-641-24
AIR FORCE TO 35C2-3-456-12
2-44-2. Testing (60 Hz).
a.
b.
c.
d.
e.
f.
g.
h.
i.
NOTE
Test frequency transducer in accordance with paragraph 2-28-2 or 2-28-3 prior to test-
ing FREQUENCY meter (HERTZ).
Shut down generator set.
Open left side engine access door and disconnect negative battery cable.
Release control panel by turning two fasteners and lower control panel slowly.
Disconnect wire 154A from positive (+) terminal of FREQUENCY meter (HERTZ).
Set multimeter for DC milliamps and connect positive lead to positive (+) terminal of FREQUENCY meter
(HERTZ) and negative lead to wire 154A.
Connect negative battery cable, start and operate generator set at rated voltage and adjust frequency to 60
Hz.
Multimeter indication should be 0.096 to 0.104 DC milliamps.
Replace FREQUENCY meter (HERTZ) if multimeter reading is not as stated above.
Raise and secure control panel.
2-44-3. Testing (400 Hz).
a.
b.
c.
d.
e.
f.
g.
h.
i.
Shut down generator set.
Open left side engine access door and disconnect negative battery cable.
Release control panel by turning two fasteners and lower control panel slowly.
Disconnect wire 154A from positive (+) terminal of FREQUENCY meter (HERTZ).
Set multimeter for DC milliamps and connect positive lead to positive (+) terminal of FREQUENCY meter
(HERTZ) and negative lead to wire 154A.
Connect negative battery cable, start and operate generator set at rated voltage and adjust frequency to 400
Hz,
Multimeter indication should be 0.096 + 0.104 DC milliamps.
Replace FREQUENCY meter (HERTZ) if multimeter reading is not as stated above.
Raise and secure control panel.
2-44-4. Removal.
a.
Shut down generator set.
b. Open left side engine access door and disconnect negative battery cable.
c.
Release control panel by turning two fasteners and lower control panel slowly.
d.
Tag and disconnect FREQUENCY meter (HERTZ) (31, FIGURE 2-14) electrical leads.
e. Remove screws (29) and nuts (30).
f.
Remove FREQUENCY meter (HERTZ) (31) from control panel.
2-75
