7
Table 3.1 continued
3.11 BDAB enables the user to set and constantly monitor the threshold level of
- and
- radiation
fluxes through the whole measurement range and record the set threshold level of
- and
-
radiation density values in the instrument’s non-volatile memory
3.12 Spectroscopic Radiation Monitor РM1403 / Display and Control Unit PM1403 produces
discontinuous sound and light alarms and the analogue scale is being filled if set threshold of
- and
- radiation flux density is reached/exceeded in the measurement mode of
- and
- radiation flux
density
3.13 Limits of permissible additional relative error
of DER measurement of
- and
- radiation must
be no more than:
- when ambient air changes from normal to -20°С
and from normal to + 50 °С
- at ambient air relative humidity 95 % at 35 °С
- when supply voltage changes from nominal to
extreme values during measurement of
- and
-
radiation flux density
- under exposure of magnetic field strength
400 A/m
-
under
exposure
of
radiofrequency
electromagnetic fields
10 %;
10 %;
5 % limits of permissible main error;
10 %;
10 %
3.14 Limits of permissible additional relative error of
- radiation flux density measurement don’t
exceed 30 % under exposure of external gamma radiation field of 200 μR/h exposure rate and don’t
exceed 15 % under exposure of external
-radiation
90
Sr+
90
Y source producing external radiation no
less than 3.0
10
3
s
-1
, placed at the distance (50
3) mm from the sensitive surface of BDAB;
3.15 Limits of permissible additional relative error of measurement of
-particles don’t exceed 15 %
under exposure of external gamma- radiation field up to 0.5 mR/h exposure dose rate;
3.16 Unstable BDAB readings when measuring
-
and
-radiation flux density during continuous
operation (8 hours), no more than
5 %
3.17 Operation conditions:
- ambient air temperature range from -20 to +50 °С;
- relative humidity of ambient air up to 95 % at 35
С;
- atmospheric pressure from 84 to 106.7 kPa
3.18 BDAB is resistant to:
- sinusoidal vibration within5-500 Hz frequency range and shifting amplitude for frequencies
lower than transition frequency 0.075 mm;
- blows with 100 m/s
2
acceleration, shock pulse duration 2-50 ms, blows repetition rate 60 -180
blows per minute.
3.19 Protection level of the BDAB case is IP64
3.20 Information exchange with Spectroscopic
Radiation Monitor РM1403 / Display and Control
Unit PM1403 or PC
RS-485 or USB interface