Vega VEGABAR 52 Foundation Fieldbus Bedienungsanleitung PDF herunterladen (Seite 51)

10 Supplement

VEGABAR 52 • Foundation Fieldbus

36720-EN-130321

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 % + 0.1 % x TD)

Ʋ Outside the compensated tempera-

ture range

< (0.05 % + 0.15 % x TD)

Thermalchangezerosignalandoutputspanwithabsolutepressuremeasuringrange0.1bar,

reference temperature 20 °C (68 °F):

Ʋ In the compensated temperature

range 0 … +100 °C (+32 … +212 °F)

< (0.1 % + 0.1 % x TD)

Ʋ Outside the compensated tempera-

ture range

< (0.15 % + 0.15 % 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 HART interface as well as to analogue current output 4 … 20 mA under refer-

enceconditions.Specicationsrefertothesetspan.Turndown(TD)istherelationnominalmeas-

uring range/set span.

Long-termdriftofthezerosignal:

Ʋ For one year < 0.05 % x TD

Ʋ Forveyears < 0.1 % x TD

Ʋ For ten years < 0.2 % x TD

Ambient conditions

Ambient, storage and transport temperature

Ʋ Standard version -40 … +80 °C (-40 … +176 °F)

Ʋ Versions IP 66/IP 68 (1 bar) and IP 68

(25bar),connectioncablePUR

-20 … +80 °C (-4 … +176 °F)

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