TM 9-4910-663-34
(22)
Adjust VARIABLE LOAD control (R32) to provide a 3 ampere indication on DC AMMETER FIELD
CURRENT meter (M7).
(23)
Set FINE CONTROL 0-5 AMPS (MAX) switch (S29) to the ON position.
(24)
Rotate FIELD CURRENT (fine) control (R27) counterclockwise and check to see that the indication on DC
AMMETER FIELD CURRENT meter (M7) decreases smoothly toward zero.
(25)
Set circuit breaker switch (CB1) to the OFF position and disconnect the external jumper lead.
l.
DC Ammeter Load & Starter Output Current Battery Charge Current Meter Circuit.
(1)
Set all test stand controls to the preliminary settings listed in table 2-2.
(2)
Set FIELD CIRCUIT switch (S32, fig 2-5) to the MANUAL position.
(3)
Set EXTERNAL FIELD EXCITER AC SYSTEM switch (S31) to the ON position.
(4)
Set DC AMMETER FIELD CURRENT RANGE switch (S30, fig 2-4) to the X6 position.
(5)
Set FINE CONTROL 0-5 AMPS (MAX) control (S29) to the OFF position.
(6)
Set FIELD CURRENT 0-32 AMPS (MAX) control (R26) fully clockwise.
(7)
Set DC VOLTMETER OUTPUT VOLTAGE SELECT switch (S11) to the VAR position, and set DC
VOLTMETER OUTPUT VOLTAGE RANGE switch (S12) to the X2 position.
(8)
Set DC AMMETER LOAD & STARTER OUTPUT CURRENT BATTERY CHARGE CURRENT RANGE
switch (S14) to the X1 position.
(9)
Connect a jumper lead between the GENERATOR F and REGULATOR B+ binding posts (fig 2-6).
(10)
Connect a 0-50 DC millivoltmeter to the calibration jacks associated with DC AMMETER LOAD &
STARTER OUTPUT CURRENT BATTERY CHARGE CURRENT meter (M3), observing polarity.
(11)
Set circuit breaker switch (CB1) to the ON position.
(12)
Check to see that DC VARIABLE POWER SUPPLY 0-32 VDC control (T5, fig 2-7) and VARIABLE LOAD
control (R32) are set fully counterclockwise.
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