VEGA VEGAPULS 62 (≥ 2.0.0 - ≤ 3.8) standpipe ver. 4 … 20 mA_HART two-wire - Manual (Page 46)

Input variable
M easured value D istance between process fitting (seal surface
hexagon or lower edge of flange) of the sensor and
product surface
M in. distance 0 mm
M easuring range up to 5.85 m (19.19 ft) 3)
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 K- band (26 GHz technology)
M
eas. interval approx. 1 s
S tep response or adjustment time 4) < 1 s (dependent on the parameter settings)
M ax. level change A djustable up to 1 m/min. (dependent on the
parameter adjustment)
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
Measuring accuracy
R esolution, general < 1 mm (0.039 in)
3) A ccording to the respective standpipe length.
4) T ime to output the correct level (with max. 10 % deviation) after a sudden
level change.
46 VEGAPULS 62 standpipe version • 4 … 20 mA/HART two-wire
10 S upplement
28737
-EN
-090305