VEGA VEGAPULS 66 (≥ 2.0.0 - ≤ 3.8) standpipe ver. 4 … 20 mA_HART four-wire User Manual
Page 42
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)
S
tep response or adjustment time
5)
>
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
6)
0.471
mW/kg
Measuring accuracy
R
esolution, general
max. 1 mm (0.039 in)
D
eviation
7)
see diagrams
0,5 m
(1.6 ft)
5,85 m
(19.19 ft)
10 mm (0.394 in)
5 mm (0.197 in)
- 5 mm (- 0.197 in)
- 10 mm (- 0.394 in)
0
Fig. 17: Deviation VEGAPULS 66 standpipe
5)
T
ime to output the correct level (with max. 10 % deviation) after a sudden
level change.
6)
at the aperture of a horn antenna with ø 150 mm
7)
I
ncl. non-linearity, hysteresis and non-repeatability.
42
VEGAPULS
66
standpipe version • 4 … 20 mA/HART four-wire
10 S
upplement
28742
-EN
-090305