8. Maintenance
8.1 Battery Replacement
The device requires four AA dry batteries, Mignon with 1.5 volts
or 4 Mignon rechargeable batteries with 1.2 volts. The operating
time with a new set of batteries is longer than 15 hours of con-
tinuous use for the basic device with internal probe (without
backlight and without USB communication) and 10 hours for ful-
ly charged rechargeable batteries. A set of rechargeable batter-
ies is included with the device.
The battery compartment, located on the back of the monitor, is
closed by a cover plate. Pull the cover downward to take it off.
Replace the batteries as shown in Figure 8.1. Then secure the
batteries with the cover plate.
Figure 8.1: Batteries in the battery compartment
If you continue to operate the device with dead batteries, the
device turns off automatically as soon as the battery voltage is
no longer sufficient for proper operation. In this case, you have
to replace the batteries to be able to restart the device.
Remove the batteries if the device is not used for rather long
period of time, e.g. several months.
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