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55
10 Supplement
VEGABAR 86 • Secondary Device for electronic differential pressure
48048-EN-220817
Adjustment ranges
Specifications refer to the nominal measuring range, pressure values lower than -1 bar cannot be
set
Level (min./max. adjustment)
Ʋ Percentage value
-10 … 110 %
Ʋ Pressure value
-120 … 120 %
Flow (min./max. adjustment)
Ʋ Percentage value
0 or 100 % fix
Ʋ Pressure value
-120 … 120 %
Differential pressure (zero/span adjustment)
Ʋ Zero
-95 … +95 %
Ʋ Span
-120 … +120 %
Density (min./max. adjustment)
Ʋ Percentage value
-10 … 100 %
Ʋ Density value
according to the measuring ranges in kg/dm
3
Interface (min./max. adjustment)
Ʋ Percentage value
-10 … 100 %
Ʋ Level value
according to the measuring ranges in m
Max. permissible Turn Down
Unlimited (recommended 20 : 1)
Max. permissible turn down with SIL
applications
10 : 1
Dynamic behaviour output
Dynamic characteristics depending on medium and temperature
90 %
100 %
10 %
t
t
T
A
t
t
S
2
1
Fig. 24: Behaviour in case of sudden change of the process variable. t
T
: dead time; t
A
: rise time; t
S
: jump response
time
1 Process variable
2 Output signal
Dead time
≤ 50 ms
Rise time
≤ 150 ms
Step response time
≤ 200 ms (ti: 0 s, 10 … 90 %)