VEGA VEGAPULS 65 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA_HART four-wire - Manual (Page 45)

Input variable
M easured value distance between process fitting and product sur-
face
M in. distance from antenna end 50 mm (1.969 in)
M easuring range up to 30 m (98.43 ft)
Reference conditions to measuring accuracy (similar to DIN EN 60770-1)
R eference conditions according to DIN EN 61298-1
-
T emperature
+ 18 … +30 °C (+64 … +86 °F)
-
R elative humidity 45 … 75 %
-
A ir pressure 860 … 1060 mbar/86 … 106 kPa (12.5 … 15.4 psig)
O ther reference conditions
-
R eflector ideal reflector, e.g. metal plate 2 x 2 m
-
F alse reflections B iggest false echo, 20 dB smaller than the useful
echo
Characteristics and performance data
F requency C- band (6 GHz technology)
B eam angle 3 dB 24°
S tep response or adjustment time 4) > 1 s (dependent on the parameter setting)
M ax. level change adjustable up to 1 m/min. (dependent on the
parameter adjustment)
M ax. emitted HF power of the antenna system
-
P ulse peak power approx. 0.1 mW
-
P ulse duration
< 2 ns
-
SAR
value 5) 0.471 mW/kg
Measuring accuracy
R esolution, general max. 1 mm (0.039 in)
D eviation 6) see diagrams
4) T ime to output the correct level (with max. 10 % deviation) after a sudden
level change.
5) at the aperture of a horn antenna with ø 150 mm
6) I ncl. non-linearity, hysteresis and non-repeatability.
VEGAPULS 65 • 4 … 20 mA/HART four-wire 45
10 S upplement
28442
-EN
-090305