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6 Set up with the display and adjustment module
MINITRAC 31 • 4 … 20 mA/HART - four-wire
40447-EN-130430
The implementation of a real value corretion is only necessary if the
requirements of the measurement loop have changed, for example
with abrasion in a tube.
If you know the density of a certain medium, you can enter the deter-
mined real density in this menu item to correct the measured value.
Thefunctionshiftsthelinearizationcurvetothisdeterminedpoint.
The measurement can thus be adapted exactly to the conditions in
the tube.
Inthismenuitemyoucandenethecharacteristicsofthesensorand
its behaviour in case of a fault.
Inthismenuitemyoucandenethebehaviourofthecurrentoutput.
You can specify the current at minimum and maximum density sepa-
rately.
Radiationfromexternalsourcescaninuencethemeasuringresultof
the sensor.
Possible external radiation sources can be, for example, a weld joint
test on a neighbouring facility or other radiation-based instruments.
An X-ray alarm is triggered if the impulses (ct/s) are more than 25 %
abovethemax.valuefromthelinearizationtable.
This fault message is only outputted for the period of the increased
X-ray radiation. Then the fault message is automatically reset.
In this menu item you can determine the behaviour of the sensor
when external radiation sources appear.
Setup/Real value correc-
tion (manually)
Setup/Curr
ent output
mode
Setup/Curr
ent output
Min./Max.
Setup/External radiation
alarm
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