Vega VEGABAR 51 Profibus PA Bedienungsanleitung PDF herunterladen (Seite 50)

10 Supplement

VEGABAR 51 • Probus PA

36714-EN-130321

Deviation determined according to the limit point method according to IEC 60770

10)

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.

Deviation

Ʋ Turn down 1 : 1 < 0.2 %

Ʋ Turn down up to 5 : 1 < 0.2 %

Ʋ Turn down up to 10 : 1 < 0.3 %

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

Ambient conditions

Ambient, storage and transport temperature

10)

Incl. non-linearity, hysteresis and non-repeatability.

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