Model 2929 Scaler Technical Manual Section 6
Ludlum Measurements, Inc. Page 6-1 January 2016
Operating Procedures
Once the Model 2929 is calibrated for use with a specific detector, the high-
voltage operating point must be determined. See HV adjustment procedures
below for details on selecting the proper operating voltage.
Count time: Selection should be based on the count rates being
observed and the desired statistical accuracy.
Volume Controls: Adjust to desired levels. Note that audio is operating
whether a count cycle is in process or not.
Detector: Connect the detector to the instrument using the cable
supplied with the instrument. Note that a cable length change can cause
a shift in calibration.
Printer: When operating two Model 264 printers and a recycle is
required, be sure that only one printer has its recycle switch “ON.”
Calibration Procedures
The following procedures apply to the Model 2929 when used in
conjunction with the Model 43-10-1 scintillator
NOTE: The following settings are normally:
Beta Threshold (B-G THS) = 4 mV
Beta Window (B-G WIN) = 50 mV
Alpha Threshold (ALPHA THS) = 175 mV
Amp/Disc Board
Apply a negative pulse of 10 mV amplitude to the DETECTOR
input of the Model 2929. A count rate greater than 25,000 cpm
should be used.
Sectio
6
To Next Page
Loading...
Need help?
General