Vega VEGADIF 65 4 … 20 mA Bedienungsanleitung PDF herunterladen (Seite 28)

4Mounting

VEGADIF 65 • 4 … 20 mA

36236-EN-130417

Themax.adjustmentiscarriedoutforthedierentialpressuremeas-

ured at density 1.2:

Δp=ρ•g•h

=1200kg/m³•9.81m/s

• 0.3 m

=3531Pa=35.31mbar

∆p

–

0,3 m

Fig. 27: Measurement setup with density measurement

Inavesselwithvaryinglevel,aninterfacemeasurementwithadif-

ferentialpressuretransmittercanberealized.Theconnectiononthe

vesseliscarriedoutviaachemicalsealontwomeasuringpoints.

Aninterfacemeasurementisonlypossibleifthedensitiesofthetwo

productsremainthesameandtheinterfaceisalwaysbetweenthe

twomeasuringpoints.Thetotallevelmustalwaysbeabovetheupper

measuring point.

Thisdensitymeasurementfunctionswithopenbutalsowithclosed

vessel.

Example for an interface measurement:

Distancebetweenthetwomeasurementpoints:0.3m

Min.density:800kg/m³

Max.density:1000kg/m³

Themin.adjustmentiscarriedoutforthedierentialpressureoccur-

ingwithdensity0.8:

Δp=ρ•g•h

=800kg/m³•9.81m/s•0.3m

=2354Pa=23.54mbar

Themax.adjustmentiscarriedoutforthedierentialpressureoccur-

ingwithdensity1.0:

Δp=ρ•g•h

=1000kg/m³•9.81m/s•0.3m

=2943Pa=29.43mbar

3. MountVEGADIF65belowthelowerchemicalseal

4. The ambient temperature should be the same for both capillaries

Interface measurement

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Vega VEGADIF 65 4 … 20 mA Bedienungsanleitung Seite 28