Replace The Transmitter Head - Emerson Rosemount 5408 Reference Manual

Service and troubleshooting
March 2023
Note
The surface echo is required to suppress the double bounce. If the surface echo enters the
Upper Null Zone, there is no product surface reference and the double bounce might be
interpreted as the surface echo.
The Double Bounce Handling function is only available in Rosemount Radar Master Plus.
Procedure
1. Read the echo curve plot to determine if double bounce echoes are present.
2. Select Configure → Level Setup → Advanced.
3. Under More Advanced Options, select Echo Tracking.
4. In the Double Bounce Handling list, select Enabled or Disabled.
5. If you enabled Double Bounce Handling, then enter desired Double Bounce Offset.
6. Select Save.
Related information
Read the echo curve
Double bounce offset
The distance between each double bounce echo is constant. The Double Bounce Offset is
used to define the distance between detected double bounces, as given by the following
formula (see
Double Bounce Offset = B - 2A
The Double Bounce Offset is negative if the reflection point (normally the tank roof) is
below the Tank Reference Point.
7.6

Replace the transmitter head

Prerequisites
In Explosion Proof/Flameproof and Non-Incendive/Type n installations, do not remove
the transmitter covers when power is applied to the unit.
Procedure
1. Disconnect the power supply.
2. If applicable, remove the external ground cable from the transmitter head.
140
Figure 7-26):
Reference Manual
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Reference Manual