Memory Backup, Operation with Rechargeable Battery

2.Remove the old battery by lifting the battery extractor loop.

3.Place the new battery in the battery compartment. Be sure to observe proper polarity.

4.Re-install the battery cover before resuming use of the instrument.

NOTES:

•Less than 10% of battery life remains when the BAT annuncia- tor turns on.

•When the battery is excessively discharged, the display is blanked.

•If the instrument is going to be stored for a long period of time or in a high temperature environment, remove the battery to prevent leakage damage.

•After a new battery is installed, allow approximately 5 sec- onds for display turn-on the first time the unit is turned on. During this period, microcomputer initialization is per- formed.

MEMORY BACKUP

During battery replacement, the contents of user-programmed memory (data, operating modes, etc.) can be saved. Prior to removing the old battery, turn off the instrument, and connect an HH22-AC battery charger. Then exchange batteries, and disconnect the battery charger. Do not leave the bat- tery charger connected to instruments with non-rechargeable batteries.

OPERATION WITH RECHARGEABLE

BATTERY

HH22-ACprovides a 9-volt Ni-Cd battery and recharger suitable for use with the unit. This battery provides 3-4 hours of continuous operation. This dura- tion can be extended to several days by operating simultaneously from both the battery and recharger.

Turn off the instrument to recharge the battery. Allow 7 hours to fully recharge the battery. Then unplug the recharger to avoid overcharging.