Vega VEGABAR 55 Profibus PA Bedienungsanleitung PDF herunterladen (Seite 50)

10 Supplement

VEGABAR 55 • Probus PA

36735-EN-130321

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 pressure measuring range 0.1 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 % + 0.1 % x TD)

Ʋ Outside the compensated tempera-

ture range

< (0.05 % + 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. 28: 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

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 67 68

Keine Kommentare

Vega VEGABAR 55 Profibus PA Bedienungsanleitung Seite 50