705-5100-121 Datasheet, PDF (26/56 Pages) Magnetrol International, Inc. – GuidedWave Radar Level Transmitter

100%
60"
0%
24"
10"
Example 1
LCD Menu
LvlUnits
in
PrbModel
7xA-x
PrbMount
NPT
Probe Ln
72 in
Lvl Ofst
0.0 in
Dielctrc
10-100
100%
60"
0%
24"
10"
Example 2
LCD Menu
LvlUnits
in
PrbModel
7xA-x
PrbMount
NPT
Probe Ln
72 in
Lvl Ofst
10 in
Dielctrc
10-100
LCD Menu
LvlUnits
in
100% PrbModel
7xR-x
PrbMount
Flange
30"
Probe Ln
48 in
Lvl Ofst
0%
-6.0 in
6"
Dielctrc
10-100
4.3.4 Offset Description
The parameter referred to as LEVEL_OFFSET in the
Transducer Block is the desired level reading when liquid
surface is at the end of the probe. The Eclipse transmitter is
shipped from the factory with LEVEL_OFFSET set to 0.
With this configuration, all measurements are referenced
from the bottom of the probe. See Example 1.
Example 1 (LEVEL_OFFSET = 0 as shipped from factory):
Application calls for a 72-inch NPT Coaxial probe in
water with the bottom of the probe 10 inches above the
bottom of the tank. The user wants the 0% point at
24 inches and the 100% point at 60 inches 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
LEVEL_OFFSET 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 NPT coaxial probe in
water with the bottom of the probe 10 inches above the
bottom of the tank. The user wants the 0% point at
24 inches and the 100% point at 60 inches 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 0%
point at the lower process connection and the 100% point
at the upper process connection. The span is the cen-
ter-to-center dimension. In this case, a negative
LEVEL_OFFSET 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 cage-coaxial flanged probe
measuring water in a chamber with the bottom of the
probe 6 inches below the lower process connection. The
user wants the 0% point to be 0 inches at the bottom
process connection and the 100% point to be 30 inches
at the top process connection.
Example 3
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57-640 Eclipse Guided Wave Radar Transmitter - FOUNDATION fieldbus^™