(h) Position DC VARIABLE VOLTS switch (S10, fig 2-2) to the ON
slowly clockwise observing CONTACT CLOSURE indicator light
(j) Operation of the relay is indicated by CONTACT CLOSURE
indicator light (DS7). When the relay contacts are closed, the indi-
cator light will illuminate. When relay contacts are open, the indi-
cator will not illuminate.
(k) The DC VOLTMETER OUTPUT VOLTAGE RANGE switch (S12, fig
may be re-positioned to obtain a lower range to yield greater
accuracy of applied dc volts.
(1) After completion of tests, decrease DC VARIABLE POWER
SUPPLY 0-32 VDC control (T5, fig 2-4) fully counterclockwise, and
switch (CB1, fig 2-5) to the OFF position.
Battery Charge Circuit.
(1) A manually operated battery charge circuit is provided.
This circuit may be used for the charging of 6, 12 or 24 volt bat-
teries and has current adjustment from 2.5 to 20 amperes. The charge
circuit also incorporates a 2-hour (120 minutes) timer. This circuit
is operable with or without the varidrive operating.
nected in electrical series.
(3) If batteries are to be changed externally, disconnect all
internal batteries and connect the external battery NEGATIVE terminal
to the COM terminal in the battery compartment and the battery PLUS
terminal to the 24 volt terminal in the battery compartment.
(4) General battery information.
Refer to TM 9-6140-200-14 for maintenance of
lead-acid storage batteries.
(a) The battery should be carefully inspected before actually
being put on charge.
1. Inspect battery posts, clamps and cables for breakage,
loose connections, corrosion, cracked or warped case, raised cell
covers and other faults.