LUDLUM 2350-1, Руководство пользователя

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MODEL 2350-1 Data Logger
7
2. CALIBRATION ROUTINES
SOURCE PARAMETERS AND TYPICAL VALUES FOR MODEL 2350-1 CALIBRATIONS
To insure that the proper sized sources are used in calculating the calibration constant, and
dead time of the Model 2350-1 and detectors the following calculation should be performed.
% Dead Time Loss = No. of source counts in 1 second X Dead Time (in seconds)
The following list provides some typical LO and HI cal points and dead times for various
detectors:
TYPICAL DEAD TIME CALIBRATION, AND OVERLOAD POINTS
TYPICAL DEAD TIME AND CALIBRATION CONSTANT SETTINGS
DETECTOR DEAD TIME CALIBRATION CONSTANT
44-2 15 - 25
µ
sec. 1.0e
10
- 0.3e
10
44-6
65 - 135
µ
sec. 7.09e
7
- 0.65e
7
44-7 250 - 270
µ
sec. 1.39e
8
- 0.1e
8
44-9 50 - 120
µ
sec. 2.0e
8
- 0.3e
8
44-38
65 - 135
µ
sec. 7.09e
7
- 0.65e
7
4 3-68 Alpha 15 - 25
µ
sec. 1
43-68 Beta
18 - 26
µ
sec. 1
4 3-37 Alpha 18 - 20
µ
sec. 1
43-37 Beta 19 - 25
µ
sec. 1
DETECTOR LOW PO INT HIGH POINT OVERLOAD POINT
44-2 500
µ
R/hr 15 mR/hr 100 mR/hr
44-6
20 mR/hr 400 mR/hr 1 R/hr
44-7 5 mR/hr 100 mR/hr N/A
44-9 6 mR/hr 200 mR/hr 1 R/hr
44-38 20 mR/hr 400 mR/hr 1 R/hr
44-116 6 mR/hr 60 mR/hr N/A