90 Power Quality Analyzer Model 3945-BCHAPTER 7MAINTENANCEUse only factory specified replacement parts. AEMC® will not be held responsiblefor any accident, incident, or malfunction following a repair done other than by itsservice center or by an approved repair center.After receiving your PowerPad® shipment, charge and discharge the instru-ment one or two cycles to ensure the proper level display of the batteryindicator.7.1 Recharging the BatteryThe batteries automatically begin recharging when the PowerPad® is connectedto the AC power supply. Only use the supplied AC power supply to recharge thebatteries of the PowerPad®.It will take approximately 6 hours to fully charge completely drained batteries. Thebatteries will not be depleted when the unit is connected to the power supply.The instrument will not recharge if the message “Instrument will soon turnOFF” is displayed on the screen. The Enter button must be pressed or theinstrument must be turned OFF before recharging will start.7.2 Battery ReplacementWARNING:• When changing the battery, disconnect all instrument inputs and turn theequipment off. There must be a delay of at least one minute without thebattery being connected.• Do not expose the battery to heat exceeding 212°F (100°C)• Do not short-circuit the battery terminalsTo change the battery, disconnect from any input and make sure the instrument isturned off.With a coin, remove back panel and replace with a 9.6V NiMH factory suppliedbattery pack.
