VEGA VEGAFLEX 67 (-40…+150°C PFA insulated) 4 … 20 mA_HART four-wire User Manual
Page 45
TS
d1
h1
h2
d2
1
L2
L1
Fig. 17: 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
I
n bulk solids applications, implementing a false
signal suppression is generally not recommended.
T
he accuracy of bulk solid applications depends
VEGAFLEX
67 • 4 … 20
mA/HART - four-wire
45
10 S
upplement
32304
-
EN
-120329