VEGA VEGAFLEX 82 4 … 20 mA_HART four-wire - Manual (Page 69)

69
11 Supplement
VEGAFLEX 82 • 4 … 20 mA/HART - four-wire
41830-EN-130314
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
Ʋ Fourth HART value (QV) Electronics temperature
Indication value - DIsplay and adjustment module 3)
Ʋ Displayed value 1 Filling height - Level
Ʋ Displayed value 2 Electronics temperature
Resolution, digital < 1 mm (0.039 in)
Accuracy (according to DIN EN 60770-1)
Process reference conditions according to DIN EN 61298-1
Ʋ Temperature +18 … +30 °C (+64 … +86 °F)
Ʋ Relative humidity 45 … 75 %
Ʋ Air pressure +860 … +1060 mbar/+86 … +106 kPa
(+12.5 … +15.4 psig)
Installation reference conditions
Ʋ Min. distance to installations > 500 mm (19.69 in)
Ʋ Vessel metallic, ø 1 m (3.281 ft), centric installation, process
fitting flush with the vessel ceiling
Ʋ Reflector metallic, ø 1 m
Ʋ Medium Bulk solids - cereals, flour, cement (dielectric con-
stant ~2.0)
Ʋ Installation Probe end does not touch the vessel bottom
Sensor parameter adjustment Gating out of false signals carried out
Typical deviation 4) See following diagrams
2) The output values can be assigned individually
3) The indication values can be assigned individually
4) Depending on the installation conditions, there can be deviations which can be rectified with an adaptation of
the adjustment or a change of the measured value offset in the DTM service mode