Battery Test; Hp 3031La Adjustments; Battery (Float) Voltage Adjustment - HP 3000 III Series Manual

HP 3242lA Series III Power Supplies
9-23. BATTERY TEST. The battery test certifies that the backup
capability of the power supply is functioning normally. The sys-
tem must be halted before performing this test. Proceed as fol-
lows:
a. On rear panel of the power supply, momentarily press the BAT-
TERY TEST toggle switch. The CROWBAR/BATT. TEST indicator
should light and the BATTERY STATUS indicator should flash at
a 2-Hz rate. Allow the battery to discharge for three to
five min utes.
b. Return the power supply to normal operation by pressing the
RESET pushbuton on power supply front panel.
c. The BATTERY STATUS indicator flashes at a O.5-Hz rate until
the battery is fully charged. Then,the indicator remains con-
tinually lighted.
9-24. HP 30311A Adjustments
The following adjustments should be performed after replacing a
power supply or after replacing a circuit board or battery pack
within the power supply.
9-25. BATTERY (FLOAT) VOLTAGE ADJUSTMENT. Float voltage must be
adj usted whenever a battery pack is replaced.
I
CAUTION
I
The replacement battery pack must be at a
stable known ambient temperature before the
adjustment is performed. For a change in
ambient temperature, the settling time for
the pack is four to six hours. Failure to
observe this precaution may considerably de-
grade the backup time and/or shorten the life
of the battery pack.
Adjust the float voltage as follows:
a. Power down the system by placing the corresponding UPPER or
LOWER MEMORY DC POWER sw itch on the System
Dc
Control Panel
to STANDBY and place the corresponding HP 303llA Power Supply
power switch off (down).
b. Remove the power supply from the cabinet and place on a suit-
able s uppor t.
c. Remove the top cover from the power supply.
9-16