Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Bedienungsanleitung PDF herunterladen (Seite 239)

App.3-11

IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00

Theconductance(1/R)isproportionaltothespecicconductivityandaconstantfactorthat

is determined by the geometry of the sensor (length divided by surface area of the hole in the

toroid) and the installation of the sensor.

Thereare2toroidsmountedinthe“doughnut”shapedsensor.Theliquidalsoowsthroughthe

secondtoroidandthereforetheliquidturncanbeconsideredasaprimarywindingofthesecond

ring transformer.

Thecurrentintheliquidwillcreateamagneticeldinthesecondtoroid.Theinducedvoltage

beingtheresultofthismagneticeldcanbemeasuredasanoutput.

Theoutputvoltageofthis“receivecoil”isthereforeproportionaltothespecicconductivityofthe

processliquid.

n Changing the settings

If any setting is accidentally changed, values to the right of the relevant arrow in Table 6 are all

initialized.

Table 6 Parameters that initialize other values

Measurement-> Output: Process

parameter->

Linear: 0% value, 100% value

Table

Communication:HART:PV

Displaysetup:Maindisplay

TrendGraphScreen-> Y-axis(low,high)

Communication: HART

Conguresensor:

Measuuringunit->

Displaysetup:Maindisplay:unit

App.

ISC

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Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Bedienungsanleitung Seite 239