Table 7-7.--Controls and Indicators for the DC Control Panel
No.
NOMENCLATURE
DESCRIPTION
FUNCTION
1
DC VOLTS
DC voltmeter
Indicates dc voltage at aircraft servicing input
terminals and receptacles.
2
DC COMMON BUS
3-position rotary switch
Selects dc common bus loading program:
LOAD PROGRAM
continuous, 5-min timed, or 5-sec timed.
SELECTOR
3
DC AMPS
DC ammeter
Indicates direct current loading of aircraft ser-
vicing input in four ranges as determined by DC
AMMETER RANGE SELECTOR switch (4)
4
DC AMMETER
4-position rotary switch
Selects current range indicated by DC AMPS
RANGE SELECTOR
meter (3). Ranges are: 0 to 200A, 0 to 400A,
0-1000A, and 0 to 2000A.
5
OVERVOLTAGE
Spring-loaded, 2-position Manually resets dc control circuit after an
RESET
toggle switch
overvoltage cutout.
6
SPLIT BUS
2-position toggle switch
Selects split load bus operation for either hard
PROGRAM
start or soft start jet engine starting.
SELECTOR
7
DC VOLTS
DC voltmeter
Indicates dc voltage at jet starting input terminals
and receptacles.
8
DC AMMETER
4-position rotary switch
Selects current range indicated by DC AMPS
RANGE SELECTOR
meter (9). Ranges are: 0 to 200A, 0 to 400A, 0 to
1000A, and 0 to 2000A.
9
DC AMPS
DC AMMETER
Indicates direct current loading of jet starting
input in four ranges as determined by DC
AMMETER RANGE SELECTOR switch (8).
10 LOAD SELECTOR DC
Seven 2-position toggle
Apply dc resistive loads to Aircraft servicing
AMPS 0-55, 50, 100, 200, switches
input in common bus mode, or to jet starting
200, 450, 450
input in split bus and hard start modes. Load
increments are in amperes, as marked.
11 SPLIT BUS SHOCK
Spring-loaded, 3-position Applies split bus resistive load to jet starting
LOAD
toggle switch
input for time intervals determined by SPLIT
BUS PROGRAM SELECTOR switch (6).
Momentary START position initiates timed test.
OFF position aborts timed test.
12 BUS SELECTOR
3-position toggle switch
Selects either common bus or split bus dc loading
configuration. OFF position disables all dc
loading.
13 COMMON BUS
2-position toggle switch
Applies common bus resistive load to aircraft
SHOCK LOAD
servicing input for continuous or timed intervals
determined by DC COMMON BUS LOAD
PROGRAM SELECTOR switch (2). ON position
initiates timed test. OFF position aborts timed
test.
14
LOAD SELECTORS DC Seven 2-position toggle
Apply dc resistive loads to aircraft servicing input
AMPS 0-55, 50, 100, 200, switches
in either common bus or split bus mode. Load
200, 450, 450
increments are in amperes, as marked.
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