Vega VEGAPULS 68 - Page 76

76
11 Supplement
VEGAPULS 68 • Foundation Fieldbus
36538-EN-170405
Deviation with bulk solids The values depend to a great extent on the application.
Bindingspecicationsarethusnotpossible.
DeviationunderEMCinuence ≤±30mm
Variablesinuencingmeasurementaccuracy
Temperature drift - Digital output ±3 mm/10 K, max. 10 mm
Additional deviation through electromag-
netic interference acc. to EN 61326
< ±50 mm
Characteristics and performance data
Measuring frequency
K-band(26GHztechnology)
Measuring cycle time approx. 700 ms
Step response time
2)
≤3s
Beam angle
3)
Ʋ Horn antenna ø 40 mm (1.575 in) 20°
Ʋ Horn antenna ø 48 mm (1.89 in) 15°
Ʋ Horn antenna ø 75 mm (2.953 in) 10°
Ʋ Horn antenna ø 95 mm (3.74 in) 8°
Ʋ Parabolic antenna 3°
Emitted HF power (depending on the parameter setting)
4)
Ʋ Average spectral transmission power
density
-14dBm/MHzEIRP
Ʋ Max. spectral transmission power
density
+43dBm/50MHzEIRP
Ʋ Max. power density at a distance of
1 m
< 1 µW/cm²
Ambient conditions
Ambient, storage and transport tempera-
ture
-40 … +80 °C (-40 … +176 °F)
Process conditions
Fortheprocessconditions,pleasealsonotethespecicationsonthetypelabel.Thelowestvalue
always applies.
Seal Antenna impedance
cone
Process temperature (measured on the process
tting)
FKM (SHS FPM 70C3
GLT)
PTFE
-40 … +130 °C (-40 … +266 °F)
PTFE
5)
-40 … +200 °C (-40 … +392 °F)
PEEK
6)
-40 … +200 °C (-40 … +392 °F)
2)
Time span after a sudden measuring distance change by max. 0.5 m in liquid applications, max 2 m with bulk
solidsapplications,untiltheoutputsignalhastakenforthersttime90%ofthenalvalue(IEC61298-2).
3)
 Outsidethespeciedbeamangle,theenergyleveloftheradarsignalis50%(-3dB)less.
4)
EIRP: Equivalent Isotropic Radiated Power.
5)
Not with steam.
6)
Not with steam.