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3.4 Checking instrument operation and functionality
Before operating the instrument, it is advisable to perform the procedures described
below.
3.4.1 Checking the Radiation Detector Module
To check the operation and functionality of the Radiation Detector module, turn on the
instrument; after the tests are completed, place a gamma source of 50 - 200 kBq activity (energy
range of 0.06 - 3.0 MeV) near the gamma detector geometrical center marked on the left side of the
instrument (Figure 3.5). The instrument will display the measured dose rate value (Figure 3.3).
When the measured dose rate value exceeds the preset threshold, an audible alarm will sound.
Remove the source. The audible alarm should terminate in 30 seconds.
Figure 3.5 – The mark of the geometrical center of the gamma detector
3.4.2 Checking the CWA Module
3.4.2.1 Calibration
To activate the CWA module turn the rotating head (2) (Figure 2.1) in the direction shown by the
arrow to match the mark on the head and the
∆
mark on the unit case.
The CWA module enters the calibration procedure and the unit displays "CHEM: CALIBRATION"
(Figure 3.6), and a specific sound of the working micropump will be heard.
Figure 3.6 – Calibration procedure screen
While in this operating mode the instrument calibrates the CWA module, i.e. performs the
ionization chamber blowing and the calibration of the module "zero".
