VEGA VEGAFLEX 82 Foundation Fieldbus - Manual (Page 74)

74
11 Supplement
VEGAFLEX 82 • Foundation Fieldbus
44221-EN-130910
Ʋ EEx-d instrument 14 … 32 V DC
Power supply by/max. number of sensors
Ʋ Fieldbus max. 32 (max. 10 with Ex)
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 No gating out of false signals carried out
Typical deviation 2) See following diagrams
L
0
-2 mm
(-0.079 ")
2 mm
(0.079 ")
15 mm
(0.591 " )
-10 mm
(-0.394 ")
0,3 m
(11.811 " )
0,08 m
(3.15 " )
0,02 m
(0.787 ")
1
Fig. 57: Deviation VEGAFLEX 82 in rod version
1 Dead band - no measurement possible in this area
L Probe length
2) 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