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Pressing the S4 key will cycle between: Normal -> Swivel modes
In the Swivel mode, the display will be rotated by 180°.
Calibrate the reading
You do not need to do the calibration if you just want to qualitatively detect radiation.
However, if you have standard radiation sources with known µSv/h value, you may
calibrate the instrument to get accurate readings.
The factory default calibration value is for general in-door and out-door
measurements.
Calibration
Select Calibrate form the Main Menu. There are three points provided for calibration.
Each calibration point needs two values to be entered, the CPM value and the µSv/h value.
The user can enter up to three calibration points from large to high count rates.
Procedure:
1. Place the testing radiation source close to unit Geiger Tube side. In Text or Graphic
mode, wait for at least 3 minutes.
2. Note the CPM value.
3. Select Calibrate menu item on the device, then input both the CPM value you noted
and the known µSv/h value of the calibration source.
4. Wait for the popup window to close to save the data for this calibration point.
5. Continue with step 1 with other calibrated radiation sources.
Navigation keys:
S1: Back/Exit
S2: Increase the value by 10 CPM or 0.1uSv/h respectively
S3: Decrease the value by 1 CPM or 0.01uSv/h respectively
S4: Toggle input data type between CPM and uSv/h
