ARMY TM 9-6115-643-24
AIR FORCE TO 35C2-3-445-22
g. Multimeter indication should be between 0.240 and 0.260 DC milliamps.
h.
Replace FREQUENCY meter (HERTZ) if multimeter readings are not as stated above.
i.
Raise and secure control panel.
2 .2 8 . 4 . Removal.
a. Shut down generator set.
b. Open battery 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) (21, FlGURE 2-12) electrical leads.
e. Remove nuts (19), washers (35), and screws (20).
f.
Remove FREQUENCY meter (HERTZ) (21) from control panel.
2.28.5.
Installation.
a. Insert FREQUENCY meter (HERTZ) (21, FIGURE 2-12) into control panel.
b. Install screws (20), washers (35). and nuts (19).
c. Connect electrical leads and remove tags.
d. Raise and secure control panel.
e. Connect negative battery cable. Close battery access door.
2.29.
AMMETER (PERCENT RATED CURRENT).
2.29.1. Inspection.
a. Shut down generator set.
b.
Inspect ammeter for broken lens, cracked housing, and other damage.
2 .2 9 . 2 . T e s t i n g .
a. Shut down generator set.
b. Open battery access and disconnect negative battery cable.
c.
Release control panel by turning two fasteners and lower control panel slowly.
d. Tag and disconnect wire 183A from terminal 1 of ammeter (PERCENT RATED CURRENT).
e. Set multimeter for AC amperes and conned between disconnected wire 183A and terminal 1 of ammeter (PER-
CENT RATED CURRENT).
f.
Connect negative battery cable, start and operate generator set at rated voltage and frequency. Appiy some load
to generator set.
g. Observe and note indications on multimeter and ammeter (PERCENT RATED CURRENT).
h. Shut down generator set.
i.
Calculate the percent of current from the multimeter indication using the following formula:
Percent of current -
100 x Multimeter Indication
0.75 amperes
2-60
Change 4
