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9. BASIC FUNCTIONS
a) Switching the Device On/Off
To switch the device on, push any key. The display shows the starting screen.
You need to enter the date and time at first commissioning (and if the rechargeable battery is not charged).
To deactivate the device, keep the "OK" button (4) pushed for approx. 2 seconds until the display goes out. The
internal clock will continue to run in the background; the date remains current as well.
b) Automatic Deactivation Function
When all selected measurements have been completed, the device will switch off automatically. This function
protects the rechargeable battery and extends the operating time.
To reactivate the device after automatic shut-down, push any key briefly. All determined values of the preceding
measurements are in the measured value storage and can be requested at any time.
c) Programmes
The "Gamma Check Pro" has three different programmes:
• Dosimeter: Determination of the radiation dose across a selectable period (in "Sv")
• Pulse counter: Determination of all pulses within an adjustable time
• Pulse rate: Display of the average pulses per second
The measuring duration must be entered for each programme. The same applies to the limit that will trip an
alarm.
These three programmes can also run at the same time, each with different measuring durations and dif-
ferent limits. When all programmes are completed, the device switches off automatically, no matter which
operating mode ("Auto" or "On", see next section) has been chosen.
d) Operating Modes
The device can work in the operating modes "Auto" and "On". In the delivery condition and after resetting of the
device, the operating mode "Auto" is always active.
• Operating mode "Auto"
In this operating mode, the display is switched off automatically after approx. 30 seconds. However, the device
continues to work in the background, i.e. all started measurements are continued. To reactivate the display, just
push any key briefly.
• Operating mode "On"
Here, the display is always activated and will not switch off on its own.
