VEGA VEGAFLEX 67 (-40…+150°C) 4 … 20 mA_HART four-wire - Manual (Page 46)

TS
d1
h1
h2
d2
1
L2
L1
Fig. 18: Interface measurement (interface is between L1 and L2)
1 Reference plane
d1 Distance to the interface (Primary Value)
d2 Distance to the level (3rd Value)
TS
Thickness of the upper medium (d1 - d2)
h1 Height - interface (Secondary Value)
h2 Height - level (4th Value)
L1
Lower medium
L2 Upper medium
R esolution, digital > 1 mm (0.039 in)
Accuracy (according 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)
-
E mulsion phase < 2 mm (< 0.079 in)
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 (dielectric figure ~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
D eviation see diagrams
T
he accuracy values of the diagrams refer to the
46 VEGAFLEX 67 • 4 … 20 mA/HART - four-wire
10 S upplement
31854
-EN
-120329