Vega VEGABAR 81 HART and accumulator pack - Operating I Bedienungsanleitung PDF herunterladen (Seite 53)

11 Supplement

VEGABAR 81 • HART and accumulator pack

45026-EN-131107

Deviation (according to IEC 60770)

Applies to the digitalsignaloutput(HART,ProbusPA,FoundationFieldbus)aswellastothe

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

measuring range/set span.

Accuracy class Non-linearity, hysteresis and re-

peatability with TD 1 : 1 up to 5 : 1

Non-linearity, hysteresis and re-

peatability with 5 : 1

0.2 % < 0.2 % < 0.04 % 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the

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

measuring range/set span.

Averagetemperaturecoecient,

zero signal

In the compensated tem-

perature range 10 … +70 °C

(+50 … +158 °F)

Outside the compensated tem-

perature range

Turn down 1 : 1 < 0.05 %/10 K typ. < 0.05 %/10 K

Turn down 1 : 1 up to 5 : 1 < 0.1 %/10 K -

Turn down up to 10 : 1 < 0.15 %/10 K -

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. 21: Thermal change, current output

Additionaltemperatureinuencethroughchemicalseal

Thespecicationsrefertodiaphragmmaterial316Laswellasisolatingliquidsiliconeoil.Theyare

only used for estimation. The actual values depend on the diameter, material and strength of the

diaphragm as well as the isolating liquid. They are available on request.

Temperaturecoecientofthechemicalsealinmbar/10Kwith

Ʋ Flange DN 50 PN 40, Form C,

DIN 2501

1.2 mbar/10 K

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 67 68

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