Ludlum Measurements 2241-2, Manual

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Model 2241-2RK Technical Manual
Section 8
Ludlum Measurements, Inc. Page 8-4 July 2012
(position 1). The Model 2241-2 will automatically convert to the correct
reading when switching between R and Sv.
The time base for count “C” is set independently in position
4. The display units may be set to:
R/hr (Roentgens per hour)
Sv/h (Sieverts per hour)
C/time base (Counts per time)
The display is auto-ranging with the appropriate multiplier
symbol appearing in front of the “R,” “Sv,” or “C”
indicating the range:
µR/hr, mR/hr, R/hr
µSv/h, mSv/h, Sv/h
C/s, kC/s, C/m, kC/m
POSITION 4
:
TIME BASE CPS OR CPM
selects the display time base for
the current detector setup. This time base only applies if the units are set
to C / (Counts/time). The time base for R/hr and Sv/h is fixed in “hr.”
For “true” reading (pulser calibration) cpm, or cps calibrations, set the
Calibration Constant (CC, parameter 2) to read “1.” For geometry
calibrations, the detector efficiency can be entered for CC.
Example:
For alpha scintillation detector with 25% 2π efficiency; enter
250 x 10
-3
in the CC parameter setup.)
The display time base may be set to:
seconds ( s )
minutes (m)