Doza RPOGRESS-GAMMA Kullanıcı Kılavuzu - Sayfa 7
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Sayfayı Yazdır
Technical condition of the gamma-spectrometer is considered acceptable in case the deviation
of the measured count rate from the reference count rate indicated in the certificate of calibration does
not exceed 10 %.
4 CALIBRATION ROUTINE
4.1 General requirements
4.1.1 Calibration of the gamma-spectrometer is performed in accordance with IEC 61453:2007.
4.2 Preliminary arrangements
4.2.1 Operations that should be performed during calibration and required equipment are listed in
the Table 4.1.
Table 4.1 - List of calibration operations
Operation
1 External examination
2 Testing
3 Determination of
metrological characteristics
4 Processing of results
Not e - It is acceptable to use other calibration equipment with characteristics that ensures determination of
metrological parameters with required precision/
4.3 Safety requirements
4.3.1 It is necessary to follow safety requirements described in section 3.2 and in
documentation accompanying calibration tools and equipment.
4.4 Conditions
4.4.1 The following normal operating conditions shall be met during calibration:
-
air temperature ............................................................................ +(20 ±5) °C;
-
relative air humidity ................................................................... from 30 to 80 %;
-
atmospheric pressure .............................................................. 86.0 to 106.7 kPa.
4.4.2 Operations conducted with calibration facilities and gamma-spectrometer under test shall
comply with guidelines detailed in relevant operation manuals.
4.4.3 Before switching the gamma-spectrometer on and performing the calibration keep it in
conditions specified in 4.4.1 for 4 hours.
4.5 Procedure
4.5.1 External examination
The following should be confirmed during the external examination:
-
completeness of the delivery kit;
-
presence of operational documentation;
-
absence of defects affecting the operation of gamma-spectrometer.
Section
Calibration equipment and its characteristics
4.5.1
Visual
4.5.2
4.5.3
Calibration source
the gamma-spectrometer).
Working standard of activity OISN (granular or solid,
geometry «Marinelli-1 L»),
activity from 1000 to 3000 Bq/kg and density 0.8÷1.2 kg/L.
PC with Software «Progress»
4.5.4
FVKM.412131.002-03RE
7
137
40
Cs+
K (included in the delivery kit of
137
226
Cs or
232
Ra or
Th with