Chapter 1 Definitions
Mini-Switch LB 471
Count rate with full container.
Geiger-Müller detector.
GM-detectors contain Geiger-Müller counter tubes; they are the
classic detectors used in radiation measuring technique. Due to
the low zero count rate, they are ideally suited for simple and low-
cost limit switch applications.
Geiger-Müller-Tube
GMT is used in this user’s guide as short form of GM-detector.
The following parameters can be set to automatic or manual
mode: For the manual mode you have to enter a fixed value in
the respective parameters. See also under „Automatic“.
Mega-Becquerel
This unit indicates the source activity. Each Bq corresponds to one
decay per second.
Milli-Curie
This unit is also used for the activity of a source. However, this
unit has been replaced by the unit MBq (1mCi = 37 MBq)
Millisievert
Dose rate unit
Detector with sodium iodine crystal and FSK communication.
See also hardware manual.
Type of radiation source: Cobalt-60 (Co-60) or Cesium-137
(Cs-137) for level measurements.
A value stored under a certain code.
A process that is started by the user in order to determine the
average value of the count rate at the respective level. This count
rate is needed to calibrate the measurement. The count rate is
averaged over a certain time (standard 60 s) to exclude statistical
and process-immanent fluctuations.
An isotope does not emit the same amount of radiation all the
time. The radiation emission is subject to statistical fluctuations
which are determined and eliminated by the time constant.
Detector with large plastic scintillator and FSK-communication.
See also hardware manual.
Count rate or percentage value upon reaching the measurement
level
Time after which an automatic reset is performed.
Count rate caused by natural environmental radiation.
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