22
57-642 ECLIPSE Model 705 Guided Wave Radar Transmitter for Hygienic Industries
2
.6.6 Offset Description
The parameter referred to as Lvl Ofst in the ECLIPSE menu
is the desired level reading when liquid surface is at the end
of the probe. The ECLIPSE transmitter is shipped from the
factory with Lvl Ofst set to 0. With this configuration, all
measurements are referenced from the bottom of the probe.
See Example 1.
Example 1 (Lvl Ofst = 0 as shipped from factory):
Application calls for a 72-inch (183 cm) Model 7xF–E
hygienic probe installed with the bottom of the probe 10
inches (25.4 cm) above the bottom of the tank. The user
wants the 4 mA point at 24 inches (61 cm) and the
20 mA point at 60 inches (152.4 cm) as referenced from
the bottom of the probe.
In those applications in which it is desired to reference all
measurements from the bottom of the vessel, the value of
Lvl Ofst should be changed to the distance between the
bottom of the probe and the bottom of the vessel as shown
in Example 2.
Example 2:
Application calls for a 72-inch (183 cm) Model 7xH
hygienic probe installed with the bottom of the probe 10
inches (25.4 cm) above the bottom of the tank. The user
wants the 4 mA point at 24 inches (61 cm) and the 20
mA point at 60 inches (152.4 cm) as referenced from the
bottom of the tank.
When the ECLIPSE transmitter is mounted in a
chamber/bridle, it is usually desirable to configure the unit
with the 4 mA (0%) point at the lower process connection
and the 20 mA (100%) point at the upper process connection.
The span is the center-to-center dimension. In this case, a
negative Lvl Ofst needs to be entered. In doing so, all
measurements are then referenced at a point up on the
probe as shown in Example 3.
Example 3:
Application calls for a 48-inch (122 cm) Model 7xF–E
probe measuring water in a chamber with the bottom of
the probe 6 inches (15.2) below the lower process con-
nection. The user wants the 4 mA point to be 0 inches )0
cm) at the bottom process connection and the 20 mA
point to be 30 inches (76.2 cm) at the top process con-
nection.
10"
60"
20 mA
4 mA
2
4"
P
rbModel
7xF-E
P
rbMount
Flange
L
vlUnits
in
Probe Ln
7
2 in
(
182.9 cm)
Lvl Ofst
0
.0 in
(0.0 cm)
Dielctrc
10-100
S
et 4mA
2
4.0 in
(61 cm)
S
et 20mA
60.0 in
(152.4 cm)
Example 1
10"
60"
20 mA
4 mA
24"
PrbModel
7xH-x
P
rbMount
Flange
LvlUnits
i
n
Probe Ln
72 in
(
183 cm)
Lvl Ofst
10 in
(25.4 cm)
Dielctrc
10-100
Set 4mA
24.0 in
(61 cm)
Set 20mA
60.0 in
(152.4 cm)
Example 2
6"
30"
4 mA
20 mA
PrbModel
7xF-E
PrbMount
Flange
LvlUnits
in
Probe Ln
48 in
(122 cm)
Lvl Ofst
-6.0 in
(-15.2 cm)
Dielctrc
10-100
Set 4mA
0 in
(0 cm)
Set 20mA
30.0 in
(76.2 cm)
Example 3
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