Vega VEGABAR 51 Operating Instructions Manual page 54

10 Supplement
Dynamic behaviour output
Run-up time approx.
100 %
90 %
10 %
Fig. 25: Sudden change of the process variable, dead time t
1
Process variable
2
Output signal
Dead time
Rise time
Step response time
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
40 °C
20 °C
-20 °C
Damping (63 % of the input variable)
Input variable
Adjustment
Adjustment range of the min./max. adjustment relating to the nominal measuring range:
Percentage value
-
Pressure value
-
Adjustment range of the zero/span adjustment relating to the nominal measuring range:
zero
-
54
10 s
1 2
t t
T A
t
S
≤ 150 ms
≤ 100 ms (10 ... 90 %)
≤ 250 ms (ti: 0 s, 10 ... 90 %)
Reaction time
approx. 2 s
approx. 3 s
approx. 11 s
0 ... 999 s, adjustable
-10 ... 110 %
-20 ... 120 %
-20 ... +95 %
t
, rise time t and step response time t
T A
VEGABAR 51 • Profibus PA
S