Vega VEGABAR 61 Proﬁbus PA Bedienungsanleitung PDF herunterladen (Seite 54)

Dynamic behaviour output

Run-up time

approx. 10 s

90 %

100 %

10 %

Fig. 28: Sudden change of

the process variable, dead time t

, rise time t

and step response time t

1 Process variable

2 Output signal

Dead time ≤ 150 ms

Rise time ≤ 100 ms (10 … 90 %)

Step response time ≤ 250 ms (ti: 0 s, 10 … 90 %)

To this amounts the reaction time of the isolatng system. This time varies from values < 1 s with

compact isolating diaphragms up to several seconds with capillary systems.

Example: Flange isolating diaphragm DN 80, ﬁlling silicone oil KN 2.2, capillary length 10 m,

measuring range 1 bar

Process temperature Reaction time

40 °C approx. 2 s

20 °C approx. 3 s

-20 °C approx. 11 s

Damping (63 % of the input variable) 0 … 999 s, adjustable

Input variable

Adjustment

Adjustment range of the min./max. adjustment relating to the nominal measuring range:

- percentage value -10 … 110 %

- pressure value -20 … 120 %

54 VEGABAR 61 • Proﬁbus PA

10 Supplement

28251-EN-081209

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Vega VEGABAR 61 Proﬁbus PA Bedienungsanleitung Seite 54