Vega VEGABAR 53 Foundation Fieldbus Bedienungsanleitung PDF herunterladen (Seite 49)

10 Supplement

VEGABAR 53 • Foundation Fieldbus

36724-EN-130321

Ʋ Turn down > 5 : 1 < 0.015 % x TD

Deviation with version 0.1 %

Ʋ Turn down 1 : 1 up to 5 : 1 < 0.1 %

Ʋ Turn down > 5 : 1 < 0.02 % x TD

Deviation with version 0.2 %

Ʋ Turn down 1 : 1 up to 5 : 1 < 0.2 %

Ʋ Turn down > 5 : 1 < 0.04 % x TD

Deviation with absolute measuring ranges 0.4 bar

Ʋ Turn down 1 : 1 up to 5 : 1 < 0.25 %

Ʋ Turn down > 5 : 1 < 0.05 % x TD

Inuenceoftheproductorambienttemperature

Thermal change zero signal and output span

Applies to the digital

signaloutput(HART,ProbusPA,FoundationFieldbus)aswellastoana-

loguecurrentoutput4…20mAandreferstothesetspan.Turndown(TD)istherationominal

measuring range/set span.

Thermalchangezerosignalandoutputspan,referencetemperature20°C(68°F):

Ʋ In the compensated temperature

range0…+100°C(+32…+212°F)

< 0.05 %/10 K x TD

Ʋ Outside the compensated tempera-

ture range

typ. < 0.05 %/10 K x TD

Thermal change, current output

Applies also to the analogue

4 … 20 mA current output and refers to the set span.

Thermal change, current output < 0.05 %/10 K, max. < 0.15 %, each with -40 … +80 °C

(-40…+176°F)

0,15 %

-0,15 %

-40°C -20°C

20°C

40°C 60°C 80°C

Fig. 27: Thermal change, current output

Long-termstability(accordingtoDIN16086andIEC60770-1)

Applies to digitalinterfaces(HART,ProbusPA,FoundationFieldbus)aswellastoanalogue cur-

rentoutput4…20mA.Specicationsrefertothesetspan.Turndown(TD)=nominalmeasuring

range/set span.

Long-termdriftofthezerosignal <(0.1%xTD)/year

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Vega VEGABAR 53 Foundation Fieldbus Bedienungsanleitung Seite 49