MODEL 2241-3RK Response Kit
from Ludlum Measurements
INDICATED USE: Emergency Response
DETECTORS: Model 44-9, Model 44-2, Model 133-7
SCA/RATE: Toggle switch to select between the
scaler and ratemeter display mode
ALERT/ALARM: Indicated by annunciator on display
and audible tone
DISPLAY: 4 digit LCD display with 0.5"(1.3cm) high
digits, separate annunciators for display units,
alert, alarm, low battery, detector overload,
counting overflow, and scaler counting
BACKLIGHT: Push-button to activate
RATEMETER: Can display in R/hr, Sv/hr, cpm, or cps
DISPLAY RANGE: Auto ranging from 0.0 µR/hr - 9999 R/hr; 0.000 µSv/hr - 9999 Sv/hr;
0 cpm - 999k cpm; or 0 cps - 100k cps
SCALER: Activated by push-button in handle
(count time adjustable from 1 - 9999 seconds in 1 second intervals )
HIGH VOLTAGE: Four independent controls; each adjustable from 200 - 2500 volts
DISCRIMINATOR: Adjustable from 2 - 100 mV
OVERLOAD: Indicated by OVERLOAD on display (adjustable depending on detector selected)
BATTERY LIFE: Typically 200 hours with alkaline batteries (low battery indicated on display)
SIZE: 6.5"(16.5cm)H X 3.5"(8.9cm)W X 8.5"(21.6cm)L
WEIGHT: 3.5 lbs (1.6kg) including batteries
The following parameters are adjusted by a removable switchboard. Once initial setup and
calibration have been completed the switchboard can be removed without affecting normal
operation of the instrument (Model 2241-3 may be ordered without switchboard )
BACKLIGHT .ON. TIME: 5, 30, 60, 90, 180, or 240 seconds for the backlight to stay .ON. .
SET MINIMUM DISPLAY: Allows lower limit of auto-ranging display to be fixed. For example,
display can be set to not show values less than 1 µR/hr.
RS-232 DATA DUMP MODE: Enables or disables dump mode to RS-232 port. When enabled
data will be dumped every 2 seconds
RS-232 DETECTOR SETUP MODE: Allows for detector parameters to be input by RS-232
port
BAUD RATE: 150, 300, 600, 1200, 2400, 4800, 9600, or 19200 bps.
DEAD TIME: Adjustable from 0 - 9999 µseconds
CALIBRATION CONSTANT: Adjustable from 0.001 - 280 X 109 counts/display unit
DISPLAY UNITS: Can read in R/hr, Sv/hr, cpm, or cps
TIME BASE: Can read in seconds or minutes
AUDIO DIVIDE: 1, 10, 100, or 1000 events-per-click
RESPONSE:
FIXED: FAST response time adjustable from approximately 2 - 50 seconds. SLOW response
is 5 times fast setting
VARIABLE: Dependent on number of counts present. Typical times FAST - 4 - 25 seconds,
SLOW - 4 - 60 secondS (All times stated from 10% to 90% of final reading )
RATEMETER ALERT/ALARM: Set at any point corresponding to pre-selected ratemeter
range
SCALER ALARM: Adjustable from 1 - 999999 counts
SCALER COUNT TIME: Adjustable from 1 - 9999 seconds
Click Here to Download a Printable Information Sheet. (.pdf format)
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