VEGA VEGAFLEX 86 Modbus and Levelmaster protocol - Manual (Page 77)

77
11 Supplement
VEGAFLEX 86 • Modbus and Levelmaster protocol
41848-EN-130314
The following table shows the resulting deviation for some typical gases and vapours. The specified
values refer to the distance. Positive values mean that the measured distance is too large, negative
values that the measured distance is too small.
Gas phase Temperature Pressure
10 bar
(145 psig)
50 bar
(725 psig)
100 bar
(1450 psig)
200 bar
(2900 psig)
400 bar
(5800 psig)
Air 20 °C/68 °F 0.22 % 1.2 % 2.4 % 4.9 % 9.5 %
200 °C/392 °F 0.13 % 0.74 % 1.5 % 3.0 % 6.0 %
400 °C/752 °F 0.08 % 0.52 % 1.1 % 2.1 % 4.2 %
Hydrogen 20 °C/68 °F 0.10 % 0.61 % 1.2 % 2.5 % 4.9 %
200 °C/392 °F 0.05 % 0.37 % 0.76 % 1.6 % 3.1 %
400 °C/752 °F 0.03 % 0.25 % 0.53 % 1.1 % 2.2 %
Steam (satu-
rated steam)
100 °C/212 °F - - - - -
180 °C/356 °F 2.1 % - - - -
264 °C/507 °F 1.44 % 9.2 % - - -
366 °C/691 °F 1.01 % 5.7 % 13.2 % 76.0 % -
Characteristics and performance data
Measuring cycle time
< 500 ms
Step response time 4) ≤ 3 s
Max. filling/emptying speed 1 m/min
Ambient conditions
Ambient, storage and transport tempera-
ture
-40 … +80 °C (-40 … +176 °F)
Process conditions
For the process conditions, please also note the specifications on the type label. The lowest value
always applies.
The measurement error from the process conditions is in the specified pressure and temperature
range of below 1 %.
Vessel pressure relating to the flange
nominal stage
see supplementary instructions manual "Flanges ac-
cording to DIN-EN-ASME-JIS"
Process pressure -1 … +400 bar/-100 … +40000 kPa
(-14.5 … +5800 psig), depending on the process fitting
Process temperature -196 … +280 °C (-321 … +536 °F)
4) 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 first time 90 % of the final value (IEC 61298-2).