3 MAINTENANCE
3.1 Maintenance involves preventive services, battery replacement and regular
performance check (according to 2.4.2 - 2.4.6).
3.2 Preventive services include external examination, dusting and decontamination in
the event of radioactive contamination.
For decontamination wipe the case of the dosimeter using a cloth wetted with
ethanol.
3.3 Battery replacement:
1) Unscrew four screws and remove the rear cover of the dosimeter;
2) Remove the battery;
3) Insert a new battery observing the polarity (“+” outward directed);
4) The LCD will display all segments and the dosimeter will enter the DER
measurement mode. If the dosimeter doesn’t respond to the buttons, the LCD displays
wrong symbols it is necessary to remove the battery and install it again in 5 min;
5) Fix the rear cover with the screws;
Attention! The back cover should be placed in such a way that buzzer center
which is installed on the inner surface of cover coincides with spring contact which
is located next to the “+” sign. (If it does not coincide the cover should be turned by
180
).
6) Set the current time and date. All previous measurements and parameters
necessary for correct operation of the dosimeter are stored in its non-volatile memory.
Note – Insert a new battery before sending a dosimeter for calibration.
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