Vega VEGAPULS 51K - Page 54

54 VEGAPULS 51K … 54K
21750-EN-031222
1)
Similar to DIN 16 086, reference conditions acc. to IEC 770, e.g.
temperature 15 °C … 35 °C; moisture 45 % … 75 %; pressure 860 mbar … 1060 mbar
2)
The adjustment time (also actuating time, response time or adjustment period) is the time required by the
sensor to output the correct level (with max. 10% deviation) after a sudden level change.
3)
Average emitted power (electromagnetic energy) received by a body per cm² directly in front of the antenna.
The received emitted power depends on the antenna version and the distance.
Characteristics
1)
(typical values under reference conditions, all statements relate to the nominal measuring
range)
Min. span between
full and empty > 10 mm (recommended > 50 mm)
Frequency 5.8 GHz (USA 6.3 GHz)
Intervals
- two-wire sensor (4 … 20 mA) 1 s
- four-wire sensor 0.5 s
Beam angle (at -3 dB)
- VEGAPULS 51 … 53 < 24°
- VEGAPULS 54
DN 80 38° (only suitable for standpipe measurement)
DN 100 30°
DN 150 20°
DN 200 16°
DN 250 14°
Adjustment time (response time)
2)
> 1 s (dependent on the parameter adjustment)
Influence of the process temperature cannot be measured at 0 bar;
at 5 bar 0.004 %/10 °K;
at 40 bar 0.03 %/10 °K
Influence of the process pressure 0.0265 %/bar
Adjustment time
2)
> 1 s (dependent on the parameter adjustment)
Emitted radar power (average) 0.717 µW
Received average emitted power
3)
- distance 1 m 0.4 … 3.2 nW per cm² (0.4 … 3.2 x 10
-9
W/cm²)
- distance 5 m 0.02 … 0.13 nW per cm²
Connection cables
Two-wire sensors power supply and signal via one
two-wire cable
Four-wire sensors power supply and signal separated
Electrical connection - spring-loaded terminals (max. 2.5 mm
2
)
- screwed connection
Cable entry
- ia terminal compartment 1 … 2 x M20 x 1.5 (cable-ø 5 … 9 mm) or
1 … 2 x ½“ NPT EEx d (cable-ø 3.1 … 8.7 mm
or 0.12 … 0.34 inch)
- Exd terminal compartment
(pressure-tight encapsulated) 1 x½“ NPT EEx d (cable-ø 3.1 … 8.7 mm or
0.12 … 0.34 inch)
Ground connection max. 4 mm²
Technical data