Service manual

Caring for the Battery

2-22

2Caring for the Battery

The battery must be installed for proper operation of the cardiograph. Even if the

cardiograph is plugged into AC power, it cannot print an ECG report without the battery.

For information about removing or replacing the battery, refer to Chapter 5, Removal and

Replacement.

The sealed lead-acid battery used in the PageWriter 100, 200, and 300 family of

cardiographs will provide optimum life when the unit is continuously connected to AC

power and fully charged after each use. A depleted battery requires 16 hours of continuous

charge time to fully charge. Because it is not always possible to allow a full charge cycle

between uses, the cardiograph was designed to charge a depleted battery to 90% of its

capacity in approximately seven hours.

Repeated undercharging of the battery will damage the battery and reduce battery life.

Hewlett-Packard recommends that the cardiograph be plugged into AC power whenever

possible to maximize battery life.

Battery life varies depending on frequency of use and maintenance. For improved battery

life, keep the cardiograph plugged in when not in use. If the battery has been fully charged

and requires recharging after a few ECGs, consider replacing it. Use only HP battery, part

number M2460A.

Battery should be removed from unit and placed in storage if the cardiograph will not be

used for more than three months.

Storing the Battery

To prepare the battery for storage, charge it in the cardiograph for 16 hours. Remove the

battery and store it in a cool, dry location. Recharge a lead-acid battery in storage for at

least 16 hours every six months. This ensures that the battery does not completely

discharge while in storage. The battery’s shelf life is longer with cooler temperatures, but

do not store below freezing.

CAUTION

NOTE