VEGA VEGAPULS 63 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA_HART - four-wire - Manual (Page 49)

A verage temperature coefficient of the zero
signal (temperature error)
0.03 %/10 K
Influence of the superimposed gas and pressure to the accuracy
T
he 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
temperatures. The following chart shows the deviation caused by some typical gases or vapours.
T
he 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 Temperature 1 bar/14.5 psig 10 bar/145 psig 50 bar/725 psig
A ir/Nitrogen 20 °C/68 °F 0.00 % 0.22 % 1.2 %
A ir/Nitrogen 200 °C/392 °F 0.00 % 0.13 % 0.74 %
H ydrogen 20 °C/68 °F -0.01 % 0.10 % 0.61 %
H ydrogen 200 °C/392 °F -0.02 % 0.05 % 0.37 %
W ater (saturated
steam)
100 °C/212 °F 0.20 % - -
W ater (saturated
steam)
180 °C/356 °F - 2.1 % -
Ambient conditions
A mbient, storage and transport temperature -40 … +70 °C (-40 … +158 °F)
Process conditions
F or the pressure stages of the vessel pressure, you also have to note the specifications on the type
label. Always the lowest value is applicable.
P
ressure stage, depending on the process fitting
-
B olting according to DIN 11851 and
11864-2, hygienic fitting LA and LB
PN 16
vessel pressure depending on the process fitting
-
fl ange up to 2" (from 300 lb)/DN 50 -100 … 1600 kPa/-1 … 16 bar (-14.5 … 232 psig)
-
F
lange from 3" (from 300 lb), DN 80
-20 … 1600
kPa/-0.2 … 16 bar (-2.9 … 232 psig)
-
T
uchenhagen Varivent
-100 … 1000
kPa/-1 … 10 bar (-14.5 … 145 psig)
-
SMS -100 … 600 kPa/-1 … 6 bar (-14.5 … 87 psig)
V essel pressure relating to the flange nom-
inal stage
see supplementary instructions manual "Flanges
according to DIN-EN-ASME-JIS"
P rocess temperature, depending on the material of the antenna encapsulation (measured on the
process fitting)
-
TFM-PTFE encapsulated -40 … +150 °C (-40 … +302 °F)
-
TFM-PTFE encapsulated (low temper-
ature version) 9)
-170 … +150 °C (-274 … +302 °F)
-
PFA encapsulated -40 … +150 °C (-40 … +302 °F)
9) N ot suitable for SIL applications.
VEGAPULS 63 • 4 … 20 mA/HART - four-wire 49
10 A nnex
28441
-EN
-120530