VEGA VEGAFLEX 81 4 … 20 mA_HART - four-wire User Manual
Page 73
73
11 Supplement
VEGAFLEX 81 • 4 … 20 mA/HART - four-wire
41825-EN-130314
Ʋ Cable probes
ε
r
≥ 1.6
Ʋ Rod probes
ε
r
≥ 1.6
2
4
5
3
2
4
5
3
1
1
Fig. 36: Measuring ranges - VEGAFLEX 81
1 Reference plane
2 Probe length L
3 Measuring range (default setting refers to the measuring range in water)
4 Upper dead band (see diagrams under Accuracy - grey section)
5 Lower dead band (see diagrams under Accuracy - grey section)
Output variable
Output signals
4 … 20 mA/HART - active; 4 … 20 mA/HART - passive
Terminal voltage passive
9 … 30 V DC
Shortcircuit protection
Available
Potential separation
Available
Signal resolution
0.3 µA
Failure signal current output (adjustable) Last valid measured value, ≥ 21.0 mA, ≤ 3.6 mA
Max. output current
22 mA
Starting current
≤ 3.6 mA
Load (4 … 20 mA/HART - active)
< 500 Ω
Damping (63 % of the input variable)
0 … 999 s, adjustable
HART output values according to HART 7 (default setting)
1)
Ʋ First HART value (PV)
Linearised percentage value, level
Ʋ Second HART value (SV)
Distance to the level
1)
The output values can be assigned individually