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49
11 Supplement
VEGACAL 69 • Two-wire 4 … 20 mA/HART
31178-EN-200929
Output variable
Output signal
4 … 20 mA/HART
HART output values
Ʋ
HART value (Primary Value)
Capacitance
Ʋ
HART value (Secondary Value)
Capacitance - scaled
Signal resolution
1.6 µA
Fault signal, current output (adjustable) mA value unchanged 20.5 mA, 22 mA, < 3.6 mA (adjust-
able)
In order to detect the rarely occurring hardware failures
in the device, we recommend monitoring both interfer-
ence values.
Current limitation
22 mA
Load
see load diagram under Power supply
Damping (63 % of the input variable)
0 … 999 s, adjustable
Rise time
500 ms (ti: 0 s, 0 … 100 %)
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
Measurement 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
For the process conditions, please also note the specifications on the type label. The lowest value
always applies.
Process pressure
-1 … 2 bar/-100 … 200 kPa (-14.5 … 29 psig)
Process temperature
Ʋ
Flange of PTFE
-40 … +100 °C (-40 … +212 °F)
Содержание VEGACAL 69
Страница 14: ...14 4 Mounting VEGACAL 69 Two wire 4 20 mA HART 31178 EN 200929 Fig 6 Inflowing medium...
Страница 57: ...57 Notes VEGACAL 69 Two wire 4 20 mA HART 31178 EN 200929...
Страница 58: ...58 Notes VEGACAL 69 Two wire 4 20 mA HART 31178 EN 200929...
Страница 59: ...59 Notes VEGACAL 69 Two wire 4 20 mA HART 31178 EN 200929...