User guide

36
6Setupwiththedisplayandadjustmentmodule
MINITRAC 31 • Foundation Fieldbus
41782-EN-131119
Setup
In this menu item you can adjust the MINITRAC 31 to the integrated
isotope in the source container.
Forthispurpose,checkwhichisotopeisintegratedinthesource
container.Youcanndthisinformationonthetypelabelofthesource
container.
Through this selection, the sensitivity of the sensor is adapted
perfectly to the isotope. The normal reduction of the emitter activity is
hence considered through the radioactive decay.
TheMINITRAC31requiresthisinformationoftheautomaticdecay
compensation. This ensures an interference-free measurement over
the complete life time of the gamma emitter - an annual recalibration
is not necessary.
Entertherequestedparametersviatheappropriatekeys,saveyour
settingswith[OK]andjumptothenextmenuitemwiththe[ESC] and
the [->] key.
Enter here, the respective application.
Thismenuitemenablesadaptationofthesensortotherequestedap-
plication.Youcanchoosebetweenthefollowingapplications:"Level",
"Density", "Limit level", "X-ray alarm" or "Real value correction".
Thenaturalradiationonearthinuencestheaccuracyofthemeas-
urement.
With this menu item the natural background radiation can be faded
out.
Note:
Make sure that some products have a self-radiation. This is for ex-
amplethecasewithoilorpotashsaltlye.Thereforethetubemustbe
lledtodeterminethebackgroundradiation.
For this purpose, the MINITRAC 31 measures the natural background
radiationandsetsthepulseratetozero.
Inthefuture,thepulseratefromthisbackgroundradiationwillbe
automatically deducted from the total pulse rate. This means: only
thecomponentofthepulserateoriginatingfromthesourcewillbe
displayed.
The source container must be closed for this setting (OFF).
Setup - Isotope
Setup - Application
Setup - Background
radiation