Ludlum Measurements 3000 - Units

Model 3000 Survey meter User’s Manual Section 7
Ludlum Measurements, Inc. Page 7-2 April 2021
Units
Depending on the chosen display units, different features will affect value of
the reading. The following table lists the features that apply to each of the
display units.
R to Sv Conversion
The R to Sv conversion is a setting available in Lumic Calibration software. It
defines the conversion factor between R and Sv. Since the calibration
constant is directly tied to R (counts per R), calibrating Sv requires a correct
setting of both calibration constant and R to Sv conversion.
Example: An R to Sv conversion factor of 0.0106 will cause a reading of
10.6 mSv/h while in a 1 R/h field.
Unit
Feature
cpm
cps
counts
Dead time correct
Bq
dpm
disintegrations
Dead time correction
Efficiency
R/h
R
Dead time correction
Calibration constant
Sv/h
Sv
Dead time correction
Calibration constant
R to Sv conversion
These apply to all modes.