LUDLUM 2360, User Manual

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Model 2360 Technical Manual
Section 4
Ludlum Measurements, Inc. Page 4-4 July 2016
SWITCH DIVIDE BY
3 4 RATIO
ON ON
1
ON OFF
10
OFF ON
100
OFF OFF
Beta audio
Subtract Mode
LOG SAMPLE
: A two-pole DIP switch (#5 & #6) used to select logging
mode. When both switches are
OFF
, the instrument will not log samples
but will output the ratemeter readings to the RS-232 port every two
seconds in ASCII format. When set to log both scaler and ratemeter, two
samples are actually saved. The logging mode is selected from the
following table.
SWITCH LOGGING
5 6 MODE
ON ON
Log ratemeter and
scaler
ON OFF
Log ratemeter
OFF ON
Log scaler
OFF OFF
No sample saved.
Output ratemeter every
2 seconds.
The following controls are utilized during calibration only and should
only be altered by a qualified calibration technician.
MTR
: a multi-turn potentiometer used to calibrate the meter to the
CPM
reading
AT
: a multi-turn potentiometer used to vary the alpha pulse discriminator
from 40 to 700 millivolts (mV)
BW
: a multi-turn potentiometer used to vary the upper beta pulse
discriminator from
BT
setting to
AT
setting
BT
: a multi-turn potentiometer used to vary the lower beta pulse
discriminator from 2 to 15 mV
OL
: a multi-turn potentiometer thatprovides a means to vary the detector
current overload set point