Polimaster PM1603A - Page 9

9
11 Anisotropy δ
α
of the dosimeter for each energy value does not exceed values (in %)
presented in Table 1.1, when the dosimeter is rotated in the horizontal plane and does not
exceed values (in %) presented in Table 1.2, when the dosimeter is rotated in the vertical
plane.
Table 1.1
Angle of detection relative to
the direction of graduation, °
Energy of gamma radiation, MeV
Anisotropy (δ
α
), %
0.059
0.662
1.25
0
30
+10/-20
+15/-15
+15/-15
60
+10/-40
+15/-15
+15/-15
90
+15/-30
+15/-15
+10/-20
120
0/-45
+15/-15
+10/-20
150
0/-35
+15/-15
+15/-15
180
0/-35
+15/-15
+15/-15
-30
+10/-15
+15/-15
+15/-15
-60
-20/-60
+15/-15
+15/-15
-90
-40/-95
0/-30
+5/-25
-120
-40/-95
+10/-20
+10/-20
-150
-10/-55
+15/-15
+15/-15
Table 1.2
Angle of detection relative to
the direction of graduation, °
Energy of gamma radiation, MeV
Anisotropy (δ
α
), %
0.059
0.662
1.25
0
30
+10/-15
+15/-15
+15/-15
60
-5/-45
+10/-20
+5/-25
90
+15/-20
0/-30
0/-30
120
-20/-65
+10/-20
+10/-20
150
0/-40
+15/-15
+10/-20
180
+5/-30
+15/-15
+10/-20
-30
-5/-35
+15/-15
+15/-15
-60
-20/-65
+5/-25
+5/-25
-90
+5/-50
0/-30
+5/-25
-120
-20/-80
+10/-20
+10/-20
-150
0/-40
+15/-15
+10/-20
12
Coefficient of variation (deviation of the
dosimeter’s readings caused by statistic
fluctuations) at DER measurement at a
confidence coefficient 0.95, no more
than
±10 %
13
Maximum permissible additional relative
error of DER measurement:
- at temperature variations from minus 20
to plus 70°С
±15 %