VEGA VEGACAL 69 4 … 20 mA_HART - two-wire - Manual (Page 40)

40
10 Supplement
VEGACAL 69 • 4 … 20 mA/HART - two-wire
31178-EN-130917
Met NAMUR recommendation NE 43
Input variable
Measured variable
Level of liquids preferably in non-conductive vessels
Measuring principle phase-selective admittance processing (PSA)
Measuring range 0 … 3000 pF
Measuring frequency 270 kHz
Accuracy (according to DIN EN 60770-1)
Reference conditions according to DIN EN 61298-1
Ʋ Temperature +18 … +30 °C (+64 … +86 °F)
Ʋ Relative humidity 45 … 75 %
Ʋ Air pressure 860 … 1060 mbar/86 … 106 kPa (12.5 … 15.4 psig)
Temperature error
Ʋ < 120 pF < 1 pF
Ʋ > 120 pF 1 % of the current measured value
Linearity error < 0.25 % of the complete measuring range
Ambient conditions
Ambient, storage and transport tempera-
ture
-40 … +80 °C (-40 … +176 °F)
Process conditions
Process pressure
-1 … 2 bar/-100 … 200 kPa (-14.5 … 29 psig)
Process temperature
Ʋ Flange of PTFE -40 … +100 °C (-40 … +212 °F)
Ʋ Flange of PP 0 … +60 °C (+32 … +140 °F)
45°C 100°C
1
-1
0
2
0°C -40°C
1
2
Fig. 25: Process pressure - Process temperature (flange of PTFE)
1 Process pressure
2 Process temperature