Model 3001 Multi-Detector Survey Meter
User’s Manual
Section 4
Ludlum Measurements, Inc.
Page 4-8
April 2017
mode (dipswitch setting), the Setup parameters will cycle through to display
the set values, but changes are not possible.
The order of Setup parameters for the Model 3001 is as follows:
Setup Page 1
Calibration Constant Mantissa (Default 200) -
Tap ON/ACK to select the
value to adjust, and MODE to adjust the value. Value is used with Calibration
Constant Exponent to express counts per selected exposure unit. Available
values are:
Ones Place (
0-9
)
Tens Place (
0-9
)
Hundreds Place (
1-9
)
Calibration Constant Exponent (Default 6) -
Tap ON/ACK to select the
value to adjust, and MODE to adjust the value. Value is used with Calibration
Constant Mantissa to express counts per selected exposure unit. Available
values are:
Ones Place (
0-9
)
Tens Place (
0-1
)
Dead Time Correction (Default Varies) -
Tap ON/ACK to select the value
to adjust, and MODE to adjust the value. Value is in microseconds. Should be
set to zero when checking instrument with pulser or function generator.
Otherwise, higher count rates will result in non-linearities. Available values are:
Ones Place (
0-9
)
Tens Place (
0-9
)
Hundreds Place (
0-9
)
See the following table for examples with specific detectors.
Detector
Dead Time
Calibration Constant
Model 44-2
10 µsec ±5 µsec
100e+08
Model 44-6
100 µsec ±35 µsec
709e+05
Model 44-7
262 µsec ±35 µsec
139e+06
Model 44-9
85 µsec ±35 µsec
200e+06
Model 44-38
100 µsec ±35 µsec
709e+05
