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Power Off the Device
To completely shutdown the device, disconnect the AC power cord then press the ON/OFF button. Such a
shutdown should always be performed prior to authorized repair of the device.
Test Operation
After cleaning and inspecting the device, proper operation of the unit may be confirmed by using an ECG simulator
to acquire and print a standard 12-lead ECG of known amplitude. Printing should be dark and even across the page.
There should be no evidence of print head dot failure (e.g., breaks in printing forming horizontal streaks). Paper
motion should be smooth and consistent during printing. Waveforms should appear normal with proper amplitude
and, without distortion or excessive noise. Paper should stop with perforations near the tear bar (indicating proper
cue sensor operation).
Recommendations to Biomedical Staff
Following any service to the device or when non-compliant operation is suspected, Mortara Instrument, Inc.
recommends the following procedures:
Confirm proper operation.
Perform testing to ensure continued electrical safety of the device
(use IEC 60601-1, ANSI/AAMI ES 60601-1, or IEC 62353 methods and limits).
patient leakage current
chassis leakage current
earth leakage current
dielectric strength or insulation resistance (mains and patient circuits, mains and signal input/output
part (e.g., USB), mains and protective earth)
Battery Maintenance
The device houses an internal, sealed lead-acid battery. When installed, the battery has a shelf life of approximately
six months without recharging. If the battery has been stored for a long period in a discharged state, it may not be
able to regain its capacity even if it is recharged.
For information about replacing the battery, please refer to the device’s service manual.
Mortara Instrument, Inc. and Burdick recommend that the device be plugged into AC power whenever possible to
maximize battery life and for the user to develop a habit of recharging the battery before the unit indicates a “low
battery” condition. (That is, reduced depth of discharge.) Battery life varies by how the battery is maintained and
how much it is used. For improved battery life, keep the electrocardiograph plugged in when not in use.
The sealed lead-acid battery will provide optimum life when the unit is fully charged after each use. When the
battery charge is depleted to its lowest level (10.6V), the device will automatically power down. To recharge a
battery from its lowest level to 85%, 4 hours of recharging may be necessary. To reach 90%, 7 hours of recharging
may be necessary. It may take longer to reach 100%. The device can be used with AC power while simultaneously
charging.
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