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6.4
BDG1 operation
BDG1 enables following operation modes:
- measurement of photon radiation DER;
- registration and accumulation of photon radiation scintillation spectra;
- identification of gamma radiation sources;
- search of photon radiation sources;
- connection to the PC.
Use BDOI keypad keys to select the line in the following order: Search Mode → Measurement
Mode →Spectra accumulation → Continue accumulation → Quick identification. Use SELECT key to
switch to the operation mode.
BDG1 automatically enters test mode every time when connected to BDOI. At that the BDOI
LCD will indicates a linear scale that indicates time left till test process termination, Figure 6.4 (1).
After termination of testing, BDG1 automatically enters the gamma background calibration
mode, Figure 6.4 (2). Linear scale in relative units indicates the time passed since the calibration
beginning. Filling of the scale means the end of the calibration. At the end of the calibration BDG1
enters the search mode of photon radiation sources.
1)
2)
Figure 6.4
6.4.1
Photon radiation DER measurement mode
To enter photon radiation DER measurement mode “Measurement mode” it is necessary to
select “Measurement mode” menu option, Figure 6.3 (1-3), in the window displaying operation
modes of the "Detector NaI [BDG1]".
The instrument in the DER measurement mode "Measurement mode" displays continuously
measured DER values of photon radiation in "μSv/h", "mSv/h", "Sv/h" or "μR/h", "mR/h", "R/h",
Figure 6.5 (1).
Statistical error of measured DER is displayed in percents with 0.95 probability under
indicated measurement units on LCD. User can start reading DER measurement data when statistical
error is 10 % or less. The less statistic error, the more accurate measurement result will be.
Level of measured DER is also displayed graphically on analogue scale. Quantity of lighting
analog scale segments corresponds to the measured DER value according to the set DER threshold
value.
