ARMY TM 9-6115-645-24
AIR FORCE TO 35C2-3-444-12
MARINE CORPS TM 09244A/09245A-24/2
2-52
FREQUENCY TRANSDUCER.
2-52.1 Inspection.
a
Shut down generator set.
b
Inspect transducer for cracked casing, burned or broken terminals, and other damage.
2-52.2 Testing (MEP 806A).
a
Shut down generator set.
b
Open battery access door and disconnect negative battery cable.
c
Remove control box top panel, paragraph 2-15.1.
d
Release control panel by turning two fasteners and lower control panel slowly.
e
Disconnect wire 181A from positive (+) terminal of FREQUENCY meter (HERTZ).
f
Set multimeter for DC milliamperes (0 to 2 Ma range) and connect positive lead to disconnected wire 181A, and
negative lead to vacant terminal of FREQUENCY meter (HERTZ).
g
Move FREQUENCY SELECT switch to 60 Hz position.
h
Connect negative battery cable.
i
Start generator set and adjust frequency to 60 Hz.
j
Multimeter indication should be between 0.781 and 0.923 Ma &
k
Adjust frequency to 62 Hz and multimeter indication should be between 0.875 and 1.125 Ma.
I
Move FREQUENCY SELECT switch to 50 Hz position.
m Adjust frequency to 50 Hz and multimeter indication should be between 0.071 and 0.213 Ma.
n
Adjust frequency to 52 Hz and multimeter indication should be between 0.213 and 0.284 Ma.
o. Shut down generator set.
p
Replace frequency transducer if readings are other than above.
q
If no repair is needed, remove multimeter and connect wire 181A to positive (+) terminal of FREQUENCY meter
(HERTZ).
r
Raise and secure control panel.
s
Install control box top panel, paragraph 2-15.4.
Change 3 2-81
