GE RSDetection RS-S131-200-ER0000 - Calculating Sensitivity

RSDetection
User’s Manual
March 2016 S131-200-UM Rev A
Page 54
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Figure 33 Calibration Setup with Shield
5. Allow the reading to stabilize and then record to the data collection system for a time
period sufficient to obtain a stable reading.
6. Repeat steps 1 through 6 for each value of “D” (12’, 14’, 16’, and 18’).
6.4 CALCULATING SENSITIVITY
Table 18 explains how to calculate the sensor sensitivity using the Calibration Data sheet. A
sample Calibration Data sheet is provided in Figure 34.
Table 18 Senor Sensitivity Calculation
P+S+A
Primary + Scattered + Ambient is the reading in amps (NO
shield between the source and the chamber.
S+A
Scattered + Ambient is the reading in amps taken with the
shield in place.
P
Primary is the difference of the readings:
amps(P) = amps (P+S+A) – amps (S+A)
Exposure rate
Determined for each distance involved from the exposure
rate at one meter from the source.