ECOTEST MKS-UM, Руководство по эксплуатации, Страница: 14 / 119

12
Table 1.3 (continued)
Name
Measurement
unit
Standardized value
according to the
specification
Measurement range of surface
alpha-particles flux density
part./(cm
2
×min)
10 – 300 000
Measurement range of surface
activity of alpha-emitting
radionuclides
Bq/cm
2
0.5 – 10 000
for П9
2)
sources type
(
239
Pu)
Energy range of detected alpha-
particles
MeV from 4.0 to 8.0
Indication range of pulse count
rate from alpha radiation detector
cps 0 – 9999
Main relative permissible error
limit during measurement of
surface alpha-particles flux
density in the range from 10 to
300 000 part./(cm
2
×min) at
239
Pu
calibration with 0.95 confidence
probability
%
15+300/ F
α
,
where F
α
is a
dimensionless
quantity, numerically
equal to surface alpha-
particles flux density
value measured in
part./(cm
2
×min)
Main relative permissible error
limit during measurement of
surface activity of alpha-emitting
radionuclides in the range from
0.5 to 10 000 Bq/cm
2
at
239
Pu
calibration with 0.95 confidence
probability from standard source
of П9 type
%
15+15/А
α
,
where А
α
is a
dimensionless
quantity, numerically
equal to surface
activity of alpha-
emitting radionuclides
value measured in
Bq/cm
2
Area of the detector’s sensitivity cm
2
7
Alpha-particles detection
efficiency from
239
Рu isotope, not
less than
0.06
Additional relative permissible
error limit during measurement of
surface alpha-particles flux
density and surface activity of
alpha-emitting radionuclides
caused by variation of
environmental temperature from
–30
о
С to +55
о
С
%
5
per each 10
о С of
deviation from 20
о
С