Cardiograph Care and Maintenance Battery Calibration
2-14 PageWriter TC 70 Cardiograph Service Manual
7 Connect the AC power cord to the cardiograph. Charge the batteries for five hours before
operating the cardiograph on battery power only.
Battery Calibration
Battery calibration may be necessary in order to enhance the accuracy of the battery level
indicator that displays on the Status Bar. If the accuracy of this indicator is affected, the other
battery indicators included on the Battery Status window that is opened by tapping the battery
icon on the Status Bar may also be less accurate.
Figure 2-4 Battery Level Indicator on Status Bar
The Estimated Remaining Runtime and Power (bar indicators) may not be accurate. The
recommended intervals for battery calibration are dependent upon factors in your clinical use
model. When the battery power indicators are not functioning so that they are useful in your
daily work environment, Philips recommends calibrating the batteries following the procedure
described in this section.
The battery calibration procedure requires that the cardiograph be taken out of active use for
up to 8 hours. If this is not practical for your specific clinical environment, an optional battery
charger/calibrator s available for purchase from Philips Medical Systems, using part number
989803162021. For more information on ordering the optional battery charger and calibrator,
see “Supplies and Ordering Information” on page 1-33.
Battery Level
Indicator
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