363-205-401 Power Up: DLP-522
Issue 7, March 1997 Page 7 of 8
27.
NOTE:
To measure battery string voltage accurately, disconnect any battery
strings other than battery string being measured. [To disconnect other
battery strings, unplug
STR( )
battery string cable connector (gray) from
STR( )
battery cable connector (gray) from power shelf.]
On power shelf connect DMM to
(1A/mV) -
and
VOLTAGE +
(bottom 2 jacks).
Turn AC circuit breaker off.
28. Does meter indicate battery string voltage of 49.5 V DC or higher?
If
YES,
then proceed to Step
30.
If
NO,
then continue with Step
29.
29. Check the four 30 Amp fuses on the
AUG4 BIU
. Visually inspect cable assem-
bly between power shelf and battery string. Replace cable assembly fuse
and/or cable assembly and
AUG4 BIU
until meter indicates correct voltage.
30. Is this the last battery string to be installed?
If
YES,
then proceed to Step
31.
If
NO,
then repeat from Step
1
for next battery string.
31. Reconnect any battery strings disconnected for battery string voltage mea-
surement. Turn AC circuit breaker on. Close and secure doors to battery com-
partment.
Comment: Battery current can be measured on the
AUG4 BIU
by mea-
suring millivolts DC between
+
and
-
for battery string 1 or 2.
One millivolt DC corresponds to 1 AMP DC. A positive read-
ing (+ to - with the common meter lead in
-
) indicates the bat-
teries are being charged.
STOP. YOU HAVE COMPLETED THIS PROCEDURE.
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