User`s guide

Replacing the Fuses

PageWriter 200/300pi M1771A/1770A Cardiograph 7-9

CAUTION Repeated undercharging of the battery will damage the battery and reduce bat-

tery life.

NOTE It is recommended that the cardiograph be plugged into AC power whenever

possible to maximize battery life.

Battery life varies by how the battery is maintained and how much it is used.

For improved battery life, keep the instrument 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 the M2460A battery.

NOTE Battery should be removed from unit and placed in storage if cardiograph will

not be used for more than three months without AC power.

Storing the Battery

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

Then remove it from cardiograph 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 level.

Replacing the Fuses

To replace the AC fuses:

1. Unplug the cardiograph from AC power.

2. Turn the cardiograph bottom-side up.

3. Locate the two AC fuse holders on the bottom of the cardiograph, as

shown in Figure 7-3.

4. Using a screwdriver, turn the fuse cap 1/2-turn counter-clockwise. As the

fuse cap is untwisted, it extends above the surface of the cardiograph case.

5. Pull the fuse cap straight up approximately 2-1/2 cm (1-inch), until it

stops.