Philips PageWriter 100 Instructions For Use Manual page 20

AC and DC (Battery) Operation
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Your cardiograph requires the battery to be installed for proper
operation—even if the cardiograph is plugged into AC power, it cannot
print an ECG report without the battery. For information about
replacing or installing the battery, refer to Appendix A, Setting up
Your Cardiograph for the First Time.
The following is a list of AC and battery operating instructions:
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A fully charged battery (without AC power) will print
approximately 40 Auto ECGs, or approximately 40 minutes of
continuous Manual ECG information.
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The Low Battery light indicates the battery needs to be
charged. If the Low Battery light begins to flash, this indicates
the cardiograph is about to shut down due to a very low battery.
Plug the cardiograph into AC power.
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From the time the Low Battery light first comes on to when the
cardiograph automatically turns itself to Standby (off), there is
typically enough reserve battery capacity to print two Auto
ECG reports or 2 minutes of Manual ECG data. A weak or
faulty battery will reduce this time.
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A discharged battery requires at least 5 minutes charging time,
with the cardiograph in Standby (off), to print an Auto ECG.
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A discharged battery requires at least 10 minutes charging time,
with the cardiograph in Standby (off), to print a 1-minute
Manual ECG.
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).
Getting Acquainted