-26-
9- T
echnic
al
C
har
ac
ter
istics
9.1 Physical Characteristics
Compliant with IEC 61526 Ed. 3, ANSI 42.20 (*)
(*) Isotropy at
241
Am and
137
Cs with angle ± 75°
Measurement and display
:
X-ray and gamma energy range: 15 keV to 7 MeV
Energy response better than ± 20% from 16 keV to 7 MeV
(typically ± 10%)
Accuracy Hp(10)
:
≤
± 19% (16 keV ~0.7 mSv/h) including ± 9% extended uncertainty k=2
≤
± 15% (
241
Am ~23 mSv/h) including ± 5% extended uncertainty k=2
≤
± 10% (
137
Cs ~24 mSv/h) including ± 5% extended uncertainty k=2
≤
± 17% (
60
Co ~5.5 mSv/h) including ± 7% extended uncertainty k=2
Display units
: mSv, µSv, or mrem
Display dose
: 1 µSv to 10 Sv (0.1 mrem to 1000 rem)
Display rate
:
0.01 mSv/h to 10 Sv/h (1 mrem/h to 1000 rem/h)
or 0.001 mSv/h to 10 Sv/h (0.1 mrem/h to 1000 rem/h)
(extended option(**))
Measurement range
:
1 µSv to 10 Sv (0.1 mrem to 1000 rem)
0.1 µSv/h to 20 Sv/h (0.01 mrem/h to 2000 rem/h)
Saturation indication : above 10 Sv (1000 rem)
or 10 Sv/h (1000 rem/h)
Dose rate linearity
:
≤
± 20 % up to 10 Sv/h (1000 rem/h) (Co and X H30 20 keV)
≤
± 20 % up to 6 Sv/h (600 rem/h)
(Pulsed X-rays 20 ms width, 1, 10 & 20 pps)
(**) - Mandatory if rate alarms are set below 50 µSv/h
(5 mrem/h) in order to display rate with better accuracy, if
fast response time for rate alarm is not required.
- Recommended for rate alarms settings below
100 µSv/h (10 mrem/h), if fast response time for rate alarm
is not required.
