VEGA VEGAPULS 65 (≥ 2.0.0 - ≤ 3.8) Profibus PA - Manual (Page 49)

Influence of the ambient temperature to the sensor electronics 10)
Average temperature coefficient of the zero
signal (temperature error) 0.03 %/10 K
Influence of the superimposed gas and pressure to the 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
temperatures. The following chart 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 Temperature 1 bar/14.5 psig 10 bar/145 psig 50 bar/725 psig
Air/Nitrogen 20 °C/68 °F 0.00 % 0.22 % 1.2 %
Air/Nitrogen 200 °C/392 °F 0.00 % 0.13 % 0.74 %
Hydrogen 20 °C/68 °F -0.01 % 0.10 % 0.61 %
Hydrogen 200 °C/392 °F -0.02 % 0.05 % 0.37 %
Water (saturated
steam) 100 °C/212 °F 0.20 % - -
Water (saturated
steam) 180 °C/356 °F - 2.1 % -
Ambient conditions
Ambient, storage and transport temperature -40 … +80 °C (-40 … +176 °F)
Process conditions
For the vessel pressure, you also have to note the specifications on the type label. Always the
lowest value is applicable.
Vessel pressure
-
Screwed part PVDF -100 … 300 kPa/-1 … 3 bar (-14.5 … 43.5 psig)
-
Screwed part and flange 316L -100 … 1600 kPa/-1 … 16 bar (-14.5 … 232 psig)
Process temperature (measured on the process fitting)
-
Process fitting, thread PVDF -40 … +130 °C (-40 … +266 °F)
-
Other process fittings -40 … +150 °C (-40 … +302 °F)
Vibration resistance mechanical vibrations with 4 g and 5 … 100 Hz 11)
Electromechanical data - version IP 66/IP 67 and IP 66/IP 68; 0.2 bar
Cable entry/plug 12)
10) Relating to the nominal measuring range, in the temperature range
-40 … +80 °C .
11) Tested according to the regulations of German Lloyd, GL directive 2.
12) Depending on the version M12 x 1, according to DIN 43650, Harting, 7/
8" FF.
VEGAPULS 65 • Profibus PA 49
10 Supplement
28447
-EN
-090305