VEGA VEGAPULS 61 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA__HART four-wire - Manual (Page 51)

M in. distance from antenna end 50 mm (1.969 in) 4)
R
ecommended measuring range, encapsu-
lated antenna system
up to 10 m (32.81 ft)
R ecommended measuring range plastic horn
antenna
up to 20 m (65.62 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 L argest false echo 20 dB smaller than the useful
echo
Characteristics and performance data
F requency K- band (26 GHz technology)
M eas. interval approx. 1 s
B
eam angle -3 dB 5)
-
E
ncapsulated antenna system 22°
-
P lastic horn antenna 10°
S tep response or adjustment time 6) < 1 s (dependent on the parameter settings)
M ax. level change A djustable up to 1 m/min. (dependent on the
parameter settings)
M
ax. emitted HF power of the antenna system
-
P
ulse peak power
< 2 mW
-
P ulse duration < 2 ns
-
A verage power < 5 µW
-
A verage power with 1 m distance < 200 nW/cm 2
M ax. emitted HF power of the antenna system - Version with increased sensitivity
-
P ulse peak power < 10 mW
-
P ulse duration < 2 ns
-
A verage power
< 25 µW
-
A verage power with 1 m distance
< 1 µW/ cm 2
4) I n products with low dielectric value up to 50 cm (19.69 in).
5) C orresponds to the range with 50 % of the emitted power
6) T ime to output the correct level (with max. 10 % deviation) after a sudden
level change.
VEGAPULS 61 • 4 … 20 mA/HART four-wire 51
10 S upplement
28439
-EN
-100426