VEGA VEGAPULS 62 (≥ 2.0.0 - ≥ 4.0.0) Foundation Fieldbus - Manual (Page 65)

65
11 Supplement
VEGAPULS 62 • Foundation Fieldbus
36506-EN-121011
Channel Numbers
Ʋ Channel 1 Process value
Ʋ Channel 8 Electronics temperature
Ʋ Channel 9 Count rate
Transmission rate 31.25 Kbit/s
Current value
Ʋ Non-Ex and Ex ia instrument 10 mA, ±0.5 mA
Ʋ Ex d instruments 16 mA, ±0.5 mA
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 > 200 mm (7.874 in)
Ʋ Reflector Plane plate reflector
Ʋ False reflections Largest false echo 20 dB smaller than the useful echo
Deviation with liquids See following diagrams
0,5 m (1.6 ft)
10 mm (0.394 in)
2 mm (0.079 in)
- 2 mm (- 0.079 in)
- 10 mm (- 0.394 in)
0
1 2 3
Fig. 56: Deviation under reference conditions
1 Reference plane
2 Antenna edge
3 Recommended measuring range
Reproducibility ≤ ±1 mm
Deviation with bulk solids The values depend to a great extent on the application.
Binding specifications are thus not possible.
Variables influencing measurement accuracy
Temperature drift - Digital output
±3 mm/10 K relating to the max. measuring range or
max. 10 mm