VEGA VEGAFLEX 81 4 … 20 mA_HART - four-wire Coax probe User Manual
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11 Supplement
VEGAFLEX 81 • 4 … 20 mA/HART - four-wire
42280-EN-130314
2
4
5
3
1
2
4
5
3
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Fig. 30: 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)
2)
Ʋ First HART value (PV)
Linearised percentage value, level
Ʋ Second HART value (SV)
Distance to the level
Ʋ Third HART value (TV)
Measurement certainty, level
2)
The output values can be assigned individually