User`s guide

AC and Battery Operation
PageWriter 200/300pi M1771A/1770A Cardiograph 1-13
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l The Low Battery message on the display indicates the battery
needs to be charged.
l From the time the Low Battery message is first displayed to when
the cardiograph automatically is turned to Standby (off), there is
typically enough reserve battery capacity to record two Auto ECGs or
2-minutes of Manual ECG data. A weak or faulty battery will reduce
this time.
l The flashing Low Battery message indicates that the cardiograph
will turn itself off in one minute unless it is plugged into AC power.
l A discharged battery requires at least 5 minutes charging time, with
the cardiograph in Standby (off), before printing an Auto ECG.
l A discharged battery requires at least 10 minutes charging time, with
the cardiograph in Standby (off), before printing a 1-minute Manual
ECG.
NOTE If the cardiograph is turned on while the battery is being charged, these
charging times are doubled (10 minutes for an Auto ECG and 20 minutes for a
1-minute Manual ECG).
l The PageWriter 200/300pi cardiograph has a battery-saving feature: it
will turn itself to Standby (off) after 30 minutes of instrument
inactivity. This prevents the cardiograph from being accidentally left
on for extended periods of time.
NOTE This feature is not active if all the limb electrodes are connected to a patient
or if the cardiograph is plugged into AC power.
l A new battery or a battery that has been stored for an extended period
of time requires charging (with the cardiograph in Standby (off)) for
16 hours in order to guarantee a full charge.
l The battery, if installed, is being charged any time the AC light is on.
l A fully depleted battery will charge to 90% of full capacity in 7 hours,
and 100% capacity in 16 hours, as long as the cardiograph is in
Standby (off) for the entire time.
l When the cardiograph is not in use, it should be connected to AC
power and left in Standby (off). This will maintain a full battery
charge and prolong battery life.