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- low-active gamma radiation source
- standard
All verification facilities should obtain valid Verification Certificates or State
Metrological Certification
Note. Use of other standard measuring equipment with the accuracy
prescribed in 3.2.2 is allowed.
3.2.3 Verification conditions
Verification should be performed in compliance with the following
conditions:
- ambient air temperature range within (20±5) °C;
- relative air humidity from 30 to 80 %;
- atmospheric pressure from 86 kPa to 106.7 kPa;
- natural background level of gamma radiation should not exceed
0.30 µSv/h;
- power supply voltage within (3.0± 0.2) V.
.
stop-watch
.
137
Cs;
114
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