GE RSDetection RS-S131-200-ER0000, Руководство пользователя

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RSDetection
User’s Manual
March 2016 S131-200-UM Rev A
Page 56
g
6.4.1 Sample Calculation
1. Calculate the Exposure Rate at a distance “D” from Co
60
source ‘t” years after
source certification:
49.1uR/h =
E
0.63 * 0.982 * 0.07475 * 1062uR/h =
E
e
*
e
*
365.8
100
1062uR/h =
E
K
*
e
*
D
100
*
E
=
E
uR/h 1062 =
E
1920days) 5.26years( = T
) 1230.8days 3.37years( = t
cm ) feet(365.8 12 = D
12
12
/5.26) 0.693(3.51 - 5(265.8) - 6.8E -
2
12
d
100) - (D
2
100 12
100













1. Sensitivity of the sensor at distance “D” from Co
60
source:
D EXPOSURE
RATE
P+S+A S+A P k(Co60)
Feet cm R/h amps amps amps amps/R/h
12 365.8 202.8e-6 -6.124e-12 -1.403e-12 -4.722e-12 -2.328e-8
K = [(P+S+A) – (S+A)] / Exposure Rate
k =
[
-6.124e-12 – -1.403e-12 ] / 202.8e-6 R/h
k = -2.328e-8 amps/R/h
2. Calculate the average sensitivity. In a typical calibration, the following values of k
might be calculated:
D k
Feet cm amps/R/h
12 366 -2.328e-8
14 427 -2.335e-8
16 488 -2.336e-8
18 549 -2.333e-8
Average(
k
) -2.333e-8
3. Calculate the standard deviation σ = 3.6e-11.