57
14 Supplement
VEGAPULS 31 • Two-wire 4 … 20 mA/HART
57820-EN-191014
Characteristics and performance data
Measuring frequency
W-band (80 GHz technology)
Measuring cycle time
8)
≤ 250 ms
Step response time
9)
≤ 3 s
Beam angle
10)
8°
Emitted HF power (depending on the parameter setting)
11)
Ʋ Average spectral transmission power
density
-3 dBm/MHz EIRP
Ʋ Max. spectral transmission power
density
+34 dBm/50 MHz EIRP
Ʋ Max. power density at a distance of
1 m
< 3 µW/cm²
Ambient conditions
Ambient temperature device
-40 … +70 °C (-40 … +158 °F)
Ambient temperature display
-25 … +80 °C (-13 … +176 °F)
Storage and transport temperature
-40 … +80 °C (-40 … +176 °F)
Mechanical environmental conditions
Sinusoidal vibrations
Class 4M8 acc. to IEC 60271-3-4
Impacts
50 g, 2.3 ms according to EN 60068-2-27 (mechanical
shock)
Impact resistance
IK07 acc. to IEC 62262
Process conditions
For the process conditions, please also note the specifications on the type label. The lowest value
(amount) always applies.
Process temperature
-40 … +80 °C (-40 … +176 °F)
Process pressure
-1 … 3 bar (-100 … 200 kPa/-14.5 … 43.51 psig)
Electromechanical data
Cable entry
Ʋ Options
M20 x 1.5; ½ NPT
Ʋ Cable gland
M20 x 1.5 (cable diameter 5 … 9 mm)
Ʋ Closing cap
½ NPT
Wire cross-section (spring-loaded terminals)
Ʋ Massive wire, stranded wire
0.2 mm² (AWG 24) … 2.5 mm² (AWG 14)
Ʋ Stranded wire with end sleeve
0.2 mm² (AWG 24) … 1.5 mm² (AWG 16)
8)
With operating voltage U
B
≥ 24 V DC
9)
Time span after a sudden distance change from 1 m to 5 m until the output signal reaches 90 % of the final
value for the first time (IEC 61298-2). Valid with operating voltage U
B
≥ 24 V DC.
10)
Outside the specified beam angle, the energy level of the radar signal is 50% (-3 dB) less.
11)
EIRP: Equivalent Isotropic Radiated Power
