VEGA VEGAPULS 65 (≥ 2.0.0 - ≥ 4.0.0) Profibus PA User Manual
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11 Supplement
VEGAPULS 65 • Profibus PA
36517-EN-121011
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
1,0 m (3.28 ft)
20 mm (0.788 in)
8 mm (0.315 in)
- 8 mm (- 0.315 in)
- 20 mm (- 0.788 in)
0
1
2
3
Fig. 45: Deviation under reference conditions
1 Reference plane
2 Antenna edge
3 Recommended measuring range
Reproducibility
≤ ±1 mm
Variables influencing measurement accuracy
Temperature drift - Digital output
±3 mm/10 K relating to the max. measuring range or
max. 10 mm
Additional deviation through strong, high
frequency electromagnetic fields acc. to
EN 61326
< ±50 mm
Characteristics and performance data
Measuring frequency
C-band (6 GHz technology)
Measuring cycle time approx.
350 ms
Step response time
1)
≤ 3 s
Tracking speed of the measuring window
max.
1 m/min
Beam angle
2)
24°
Emitted HF power (depending on the parameter adjustment)
3)
Ʋ Average spectral transmission power
density
-31 dBm/MHz EIRP
Ʋ Max. spectral transmission power
density
+24 dBm/50 MHz EIRP
Ʋ Specific absorption rate (SAR)
0.47 mW/kg
1)
Time span after a sudden measuring distance change by max. 0.5 m in liquid applications, max 2 m with bulk
solids applications, until the output signal has taken for the first time 90 % of the final value (IEC 61298-2).
2)
Outside the specified beam angle, the energy of the radar signal has a level which is reduced by 50 % (-3 dB)
3)
EIRP: Equivalent Isotropic Radiated Power