User guide

32
6Setupwiththedisplayandadjustmentmodule
MINITRAC 31 • Foundation Fieldbus
41782-EN-131119
By doing so, you assign a respective level to the actual count rate.
Acceptthevaluepairwith"OK".
Dependingifyouhavestartedwithfulloremptyvessel,youhaveto
continueemptyingorllingthevessel.
Alsocarryoutsuchalinearizationwithseveraldierentllingheights
if you have a linear vessel.
A maximum of 32 linearisation points is possible.
In this menu item you can adjust the damping of the sensor. With
ityoucansuppressuctuationsinthemeasuredvalueindication,
causede.g.byanagitatedproductsurface.Thistimecanbebetween
1 and 1200 seconds. Keep in mind that the reaction time also in-
creasesandtheinstrumentreactstoquicklevelchangeswithadelay.
Generallyatimeofapproximately60secondsissucienttosmooth
the measured value indication.
Radiationfromexternalsourcescaninuencethemeasuringresultof
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 %
abovethemax.valuefromthelinearizationtable.
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.
In this menu item you can activate the relay output and determine its
functionaswellastheswitchingpoints.
When the output of the process values is set, you can choose be-
tweenoverllanddryrunprotection.
The relay outputs of the sensor react accordingly.
You can choose "no" reference value. In this case, the relay output
operates as fail safe relay.
Caution:
Independentoftheselectedreferencevalue,therelaywilldeenergize
in case of failure.
Additional adjustments
Whenaresetiscarriedout,allsettings(withonlyafewexceptions)
are reset. The exceptions are: PIN, language and SIL.
Setup - Damping
Setup - External radiation
alarm
Setup - Relay
Additional adjustments
- Reset