VEGA VEGAPULS 65 (≥ 2.0.0 - ≤ 3.8) Foundation Fieldbus - Manual (Page 48)

Input variable
Measured value distance between process fitting and product sur-
face
Min. distance from antenna end 50 mm (1.969 in)
Measuring range up to 30 m (98.43 ft)
Reference conditions to measuring accuracy (similar to DIN EN 60770-1)
Reference conditions according to DIN EN 61298-1
-
Temperature +18 … +30 °C (+64 … +86 °F)
-
Relative humidity 45 … 75 %
-
Air pressure 860 … 1060 mbar/86 … 106 kPa (12.5 … 15.4 psig)
Other reference conditions
-
Reflector ideal reflector, e.g. metal plate 2 x 2 m
-
False reflections Biggest false echo, 20 dB smaller than the useful
echo
Characteristics and performance data
Frequency C-band (6 GHz technology)
Beam angle 3 dB 24°
Step response or adjustment time 3) > 1 s (dependent on the parameter setting)
Max. level change adjustable up to 1 m/min. (dependent on the
parameter adjustment)
Max. emitted HF power of the antenna system
-
Pulse peak power approx. 0.1 mW
-
Pulse duration < 2 ns
-
SAR value 4) 0.471 mW/kg
Measuring accuracy
Resolution, general max. 1 mm (0.039 in)
Deviation 5) see diagrams
3) Time to output the correct level (with max. 10 % deviation) after a sudden
level change.
4) at the aperture of a horn antenna with ø 150 mm
5) Incl. non-linearity, hysteresis and non-repeatability.
48 VEGAPULS 65 • Foundation Fieldbus
10 Supplement
28452
-EN
-090305