VEGA VEGADIF 65 4 … 20 mA - Manual (Page 69)

69
10 Supplement
VEGADIF 65 • 4 … 20 mA
36236-EN-130417
Max. torque screws mounting strap 30 Nm
Max. torque screws socket external
housing
5 Nm (3.688 lbf ft)
Weight approx. 4.2 … 4.5 kg (9.26 … 9.92 lbs), depending on process
fitting
Output variable
Output signal
4 … 20 mA
Signal resolution 1.6 µA
Failure signal output current mA value unchanged 20.5 mA, 22 mA, < 3.6 mA (adjust-
able)
Max. output current 22 mA
Load see load diagram under Power supply
Met NAMUR recommendation NE 43
Dynamic behaviour output
Run-up time
≤ 20 s
I
63 %
100 %
t
t
1
t
2
Fig. 51: Presentation of the dead time t
1
and the time constant t
2
The following specified total dead time applies to the 4 … 20 mA current output:
Version, nominal measuring range Dead time t
1
Time constant t
2
Basic version 10 bar and 30 bar 100 ms 250 ms
Basic version 100 mbar 100 ms 180 ms
Basic version 500 mbar 100 ms 180 ms
Basic version, 3 bar 100 ms 180 ms
Basic version 16 bar and 40 bar 100 ms 180 ms
Chemical seal version, all nominal measuring ranges Dependent on the chemi-
cal seal
Dependent on the chemi-
cal seal
Damping (63 % of the input variable) 0 … 999 s, adjustable
Input variable
Measured variable
Differential pressure, flow and level derived from it
Adjustment differential pressure