VEGA VEGAFLEX 61 4 … 20 mA_HART four-wire - Manual (Page 46)

C ycle time min. 1 s (dependent on the parameter setting)
S
ignal resolution 1.6 µA
F ailure signal current output (adjustable) mA value unchanged 20.5 mA, 22 mA, < 3.6 mA
(
adjustable)
M ax. output current 22 mA
L oad < 500 Ω 3)
D
amping (63 % of the input variable) 0 … 999 s, adjustable
F ulfilled NAMUR recommendations NE 43
HART output values
-
1. HART value (Primary Value) D istance to the level
-
2. HART value (Secondary Value) D istance to the level - scaled (for example hl, %)
R esolution, digital > 1 mm (0.039 in)
Accuracy (similar to DIN EN 60770-1)
P rocess reference conditions according to DIN EN 61298-1
-
T emperature + 18 … +30 °C (+64 … +86 °F)
-
R elative humidity 45 … 75 %
-
A ir pressure + 860 … +1060 mbar/+86 … +106 kPa
(+12.5 … +15.4 psig)
I nstallation reference conditions
-
M in. distance to installations > 500 mm (19.69 in)
-
V essel metallic, ø 1 m (3.281 ft), centric installation,
process fitting flush with the vessel ceiling
-
M edium W ater/Oil (Dk value ~2.0)
-
I nstallation P robe end does not touch the vessel bottom
S ensor parameter adjustment G ating out of false signals carried out
I n bulk solids applications, implementing a false
signal suppression is generally not recommended.
T
he accuracy of bulk solid applications depends
considerably on the application. Hard and fast
accuracy specifications are thus not available.
D eviation see diagrams
D
epending on the installation conditions, there can
be deviations which can be rectified with an
adaptation of the adjustment or a change of the
measured value offset in the DTM service mode.
3) W ith inductive load ohmic share min. 25 Ω/mH.
46 VEGAFLEX 61 • 4 … 20 mA/HART four-wire
10 S upplement
31834
-EN
-100426