Front-Panel Calibration Controls - LUDLUM MODEL 2241-2 Technical Manual

Model 2241-2
Ludlum Measurements, Inc.
Technical Manual
Variable Response
from 1 to 10 seconds, while the
response time is automatically adjusted in proportion to the incoming count
rate between the
F
: The
Fixed Response
time - TC. The position is five times slower than the selected fast TC.
S
LIGHT (LCD Backlight)
the LCD for a pre-programmed time. The backlight
selected between 5 and 240 seconds during the parameter setup.
RESET Pushbutton Switch
switch resets the ratemeter display to the minimum display readout.
RESET
In an alarm condition (ratemeter or scaler), depressing
audible alarm. Depressing
alarm and/or alert condition.
Note:
The
RESET
that the instrument is in. For example, the
not affect the scaler alarm if the instrument is in the ratemeter
mode.
Scaler C Switch
OUNT
2241-2 carrying handle, which when depressed, initializes the start of the
scaler count accumulation
/
SCALER RATEMETER
counting cycle. The scaler display uses the two digits in the lower right hand
corner for the two most significant digits of the six-digit readout. Scaling
time can be set from 1 to 9999 seconds in the parameter setup by way of the
switch board. Depressing the
the scaler display to 0, resetting the alarm condition.
Front Panel Calibration Controls
Note:
Remove the front-panel calibration cover to expose the
following calibration controls:
: The position allows the time constant (TC) to vary
F
position varies from 1 to 30 seconds. The
S
/ TC variables.
S
position corresponds to the selected fixed response
F
: A pushbutton switch, when depressed, illuminates
: In the non-alarm condition, depressing the
a second time will reset the ratemeter
RESET
button only silences the alarm in the current mode
: ushbutton switch located in the end of the Model
p
for the
switch must be in the
switch after a scaler
COUNT
Page 4-3
Section 4
time can be
ON
will silence the
RESET
button will
RESET
preset scaling time.
position to initiate the
SCALER
will reset
ALARM
January 2016
The