VEGA VEGACAL 67 4 … 20 mA_HART - two-wire - Manual (Page 41)

41
10 Supplement
VEGACAL 67 • 4 … 20 mA/HART - two-wire
31758-EN-130917
Supporting tube length L1 0.2 … 5.6 m (0.656 … 18.37 ft)
Max. lateral load 10 Nm (7.4 lbf ft)
Max. tensile load (cable)
Ʋ Ceramic partly insulated: ø 8 mm
(0.315 in)
10 KN (2248 lbf)
Max. torque (process fitting - thread) 80 Nm (58 lbf ft)
Output variable
Output signal
4 … 20 mA/HART
HART output values
Ʋ HART value (Primary Value) Capacitance
Ʋ HART value (Secondary Value) Capacitance - scaled
Resolution 1.6 µA
Failure signal current output (adjustable) mA value unchanged 20.5 mA, 22 mA, < 3.6 mA (adjust-
able)
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 non-conductive liquids and solids
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 … 16 bar/-100 … 1600 kPa (-14.5 … 232 psig)