VEGA VEGAPULS 61 (≥ 2.0.0 - ≤ 3.8) Profibus PA User Manual
Page 55
Resolution, digital
>
1 mm (0.039 in)
Input variable
Measured variable
distance between process fitting and product sur-
face
Min. distance from antenna end
50 mm (1.969 in)
6)
Recommended measuring range, encapsu-
lated antenna system
up to 10 m (32.81 ft)
Recommended measuring range plastic horn
antenna
up to 20 m (65.62 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
Largest false echo 20 dB smaller than the useful
echo
Characteristics and performance data
Frequency
K-band (26 GHz technology)
Meas. interval approx.
1 s
Beam angle -3 dB
7)
-
Encapsulated antenna system
22°
-
Plastic horn antenna
10°
Step response or adjustment time
8)
<
1 s (dependent on the parameter settings)
Max. level change
Adjustable up to 1 m/min. (dependent on the
parameter settings)
Max. emitted HF power of the antenna system
-
Pulse peak power
<
2 mW
-
Pulse duration
<
2 ns
-
Average power
<
5 µW
-
Average power with 1 m distance
<
200 nW/cm
2
Max. emitted HF power of the antenna system - Version with increased sensitivity
-
Pulse peak power
<
10 mW
6)
In products with low dielectric value up to 50 cm (19.69 in).
7)
Corresponds to the range with 50 % of the emitted power
8)
Time to output the correct level (with max. 10 % deviation) after a sudden
level change.
VEGAPULS
61 • Profibus PA
55
10 Supplement
28444
-EN
-100426