Martel Electronics 320 - Manual (Page 11)

BATTERY CHECK
The Bat Ck key may be pressed at any time after
completion of the calibrator startup routine to diplay
the current batttery voltage for approximately 1
second before the normal display returns. The current
input funciton is not disturbed by making a battery
check measurement.
The battery voltage of the Model 320 calibrator should
be between 5.3 and 4.6 volts. When the voltage falls
below 4.8 volts, a warning message is displayed
approximately every minute. When the voltage falls
below 4.6 volts for 1 minute, the calibrator will turn
itself off to prevent damage to the batteries due to
possible reversal.
The batteries of the LPS are checked by plugging the
cable provided with the LPS into the battery charger
jack located on the side of the LPS. The other end of
the cable should be plugged into the Model 320 V
input. When voltage is selected on the keypad, the
LPS battery voltage will be displayed on the Model
320.
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