User guide

48
6Setupwiththedisplayandadjustmentmodule
MINITRAC 31 • Foundation Fieldbus
41782-EN-131119
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.
In this menu item you can select the temperature unit.
inthismenuitemyoucanselectifyouwanttocarryoutasingleor
double point adjustment on the sensor.
With the double point adjustment, the Delta I value is selected auto-
matically.
We recommend selecting the double point adjustment. To use this,
you must be able to change the level of the vessel so as to carry out
theadjustmentofthesensorwithfullstatus(covered)andwithempty
status (uncovered).
Hence,youwillgetaveryreliableswitchingpoint.
Withsinglepointadjustment,youhavetodenethedierence
betweenthemin.andmax.adjustmentpoints(DeltaI)yourselfduring
thefollowingsetup.
This menu item appears only if you have selected "Single point
adjustment" as adjustment mode (Setup/Adjustment mode).
InthismenuitemyoudeterminethepointatwhichtheMINITRAC31
shouldswitchinuncoveredstatus.
Empty the vessel until the sensor is uncovered.
Forthisentertherequestedpulseratemanuallyorlettheratebe
determined by MINITRAC 31. Automatic determination of the pulse
rate should be given preference.
The pulse rate is entered in ct/s. This is the number of counts per
second, i.e. the measured gamma radiation reaching the sensor.
Prerequisites:
•
Radiationisswitchedon-Sourcecontainerissetto"ON"
•
Thereisnomediumbetweensourcecontainerandsensor
Setup - Unit
Setup - Adjustment mode
Setup - Adjustment
uncovered (single point
adjustment)