Vega MINITRAC 31 - Page 40

40
6Setupwiththedisplayandadjustmentmodule
MINITRAC 31 • Foundation Fieldbus
41782-EN-211203
L
Fig. 21: With inclined mounting, the radiated length of the tube is applicable
In this menu item you can carry out the adjustment of the sensor.
Caution:
Duringtherstsetuporafteraninstrumentreset,thelinearization
standsatthepresetvaluepair(90000ct/sand0.500g/cm
3
).These
values are not suitable for your application and must be replaced by
realvalues.Deletethisvaluepairinthefollowingprocedureandcarry
outthelinearization.
Duetothemeasuringprinciple,thereisnolinearrelationshipbetween
pulserateanddensity.Hence,thisadjustment(i.e.linearization)must
be carried out in any event.
Carryoutthisadjustmentwithseveralpointstoincreasetheaccuracy
of the measurement.
Note:
Waterhasasaknowndensityvalueof1g/cm
3
. Carry out the adjust-
mentwithwater,ifpossible.
•
Prerequisites:
Radiationisswitchedon-Sourcecontainerissetto"ON"
Thetubeiscompletelylled.Possiblegasbubblesorairinclusions
caninuencethemeasurement.
The MINITRAC 31 sorts the points automatically according to their
density.
Linearisation