Endress+Hauser Gammapilot FMG50 - Page 50

Commissioning Gammapilot FMG50
50 Endress+Hauser
7. Configuration of the temperature unit
 Selection of temperature unit
Configuration of the reference time
The first time you run the user guidance function, the reference date is entered for
calculating the radioactive decay of the radiation source (this is normally the current date).
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The date of the operating tool is accepted by pressing the "Reference date for decay
calculation" button.
The real-time clock is already set at the factory and backed by a battery. For more
details, see Section 8.8
Note: The reference date can only be set once. It is only possible to change the setting
by resetting the device to the factory setting, see Section 6.4.
Selection of the isotope used and the beam type (depends on the operating mode)
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Once the reference date is set, the isotope used is then selected. The isotope must be
selected to be able to compensate for isotope decay correctly
A
137
Cs or
60
Co source acts as the radiation source. Alternatively, radiation sources with
other decay constants can also be used. The decay time can be defined as between 1 and
65536 days. Decay times for other isotopes can be found in the "NIST Standard Reference
Database 120", see:
https://www.nist.gov/pml/radionuclide-half-life-measurements/radionuclide-half-life-
measurements-data
If no decay compensation is selected, the Gammapilot FMG50 determines the measured
variable without any compensation.
If a gamma modulator FHG65 is used for interference radiation suppression, "modulated"
must be selected for the beam type. If the Gammapilot FMG50 is used without the gamma
modulator FHG65, the default option "not modulated" is left as is.