VEGA VEGAPULS 61 (≥ 2.0.0 - ≥ 4.0.0) Foundation Fieldbus Approval according to LPR radio standard - Manual (Page 68)

0,5 m (1.6 ft)
10 mm (0.394 in)
- 10 mm (- 0.394 in)
2 mm (0.079 in)
- 2 mm (- 0.079 in)
0
1 2 3
Fig. 50: Deviation under reference conditions - plastic horn antenna
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
Additional deviation through strong, high
frequency electromagnetic fields acc. to EN
61326 < ±50 mm
Characteristics and performance data
Frequency K-band (26 GHz technology)
Measuring cycle time 450 ms
Step response time 1) ≤ 3 s
Tracking speed of the measuring window
max. 1 m/min
Beam angle 2) 10°
Emitted HF power 3)
-
Average spectral transmission power
density -34 dBm/MHz EIRP
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
68 VEGAPULS 61 • Approval according to LPR radio standard
11 Supplement
41716
-EN
-120301