Vega VEGAPULS 63 Operating Instructions Manual page 52

10 Supplement
Average temperature coefficient of the
zero signal (temperature error)
Influence of the superimposed gas and pressure on measurement accuracy
The spreading speed of the radar impulses in gas or vapour above the product is reduced by high
pressures. This effect depends on the superimposed gas or vapour and increases with low tem-
peratures. The following table shows the deviation caused by some typical gases or vapours. The
stated values refer to the distance. Positive values mean that the measured distance is too high,
negative values that the measured distance is too small.
Gas phase
Air/Nitrogen
Air/Nitrogen
Hydrogen
Hydrogen
Water (saturated
steam)
Water (saturated
steam)
Ambient conditions
Ambient, storage and transport tempera-
ture
Process conditions
For the pressure stages of the vessel pressure, you also have to note the specifications on the type
label. Always the lowest value is applicable.
Pressure stage, depending on the process fitting
Ʋ Slotted nut according to DIN 11851
and 11864-2, hygienic fitting LA and
LB
vessel pressure depending on the process fitting
Ʋ flange up to 2" (from 300 lb)/DN 50
Ʋ Flange from 3" (from 300 lb), DN 80
Ʋ Tuchenhagen Varivent
Ʋ SMS
Vessel pressure relating to the flange
nominal pressure stage
Process temperature, depending on the material of the antenna encapsulation (measured on the
process fitting)
Antenna encapsulation
TFM-PTFE and TFM-PT-
FE 8 mm
TFM-PTFE 8 mm
52
Temperature 1 bar/14.5 psig
20 °C/68 °F 0.00 %
200 °C/392 °F 0.00 %
20 °C/68 °F -0.01 %
200 °C/392 °F -0.02 %
100 °C/212 °F 0.20 %
180 °C/356 °F -
Version
Standard
Flange Alloy 400 (2.4360)
0.03 %/10 K
10 bar/145 psig
0.22 %
0.13 %
0.10 %
0.05 %
-
2.1 %
-40 ... +70 °C (-40 ... +158 °F)
PN 16
-100 ... 1600 kPa/-1 ... 16 bar (-14.5 ... 232 psig)
-20 ... 1600 kPa/-0.2 ... 16 bar (-2.9 ... 232 psig)
-100 ... 1000 kPa/-1 ... 10 bar (-14.5 ... 145 psig)
-100 ... 600 kPa/-1 ... 6 bar (-14.5 ... 87 psig)
see supplementary instructions manual "Flanges ac-
cording to DIN-EN-ASME-JIS"
Process temperature (measured on the process
fitting)
-40 ... +150 °C (-40 ... +302 °F)
-10 ... +150 °C (14 ... +302 °F)
VEGAPULS 63 • 4 ... 20 mA/HART - four-wire
50 bar/725 psig
1.2 %
0.74 %
0.61 %
0.37 %
-
-