Model 2200 Scaler Ratemeter
Ludlum Measurements, Inc. Page 9 March 2016
Operating Procedures
Power
Select either line or battery operation with the power switch.
Line Operation: Connect the instrument to line power of 95-250 Vac, 50-60
Hz. Turn the power switch to LINE and proceed to use the instrument.
Battery Operation: The battery lids are located at the rear of the instrument.
Use a coin or screwdriver to open the lids. Place 4 “D” cells in the instrument
with the terminal “buttons” (positive ends) facing out. Turn the power switch to
BAT to operate. Check the battery condition by placing the RATE-HV-BAT
selector to BAT. (A downscale reading indicates battery reversal.)
Operational Check: Determine that the instrument is operational by pressing
COUNT. The count lamp should illuminate. (This action starts the scaler
count.)
DISCR and THRESHOLD Settings
The instrument DISCR control is calibrated at the factory so that 1.00 on the
threshold dial is equal to a 10 mV input sensitivity. The DISCR control should
not be changed unless a pulser is available to determine the threshold-versus-
millivolt relationship.
The threshold control should not be set below 1.00. Excessive counting may
occur at lower threshold settings.
Set DISCR and THRESHOLD for appropriate detector.
For scintillation detectors:
Set THRESHOLD on 1.00.
Connect scaler to pulser.
Set pulser pulse height at 10 mV.
Sectio
5
To Next Page
Loading...
