Burkert 8138 Mise En Service page 12

4 Mounting
Installation position
Inflowing medium
12
When mounting the LEVEL TRANSMITTER 8138, keep a distance of
at least 200 mm (7.874 in) to the vessel wall. If the sensor is installed
in the center of dished or round vessel tops, multiple echoes can
arise. These can, however, be suppressed by an appropriate adjust-
ment (see chapter "Setup").
If you cannot maintain this distance, you should carry out a false
signal storage during setup. This applies particularly if buildup on the
vessel wall is expected. In such cases, we recommend repeating the
false signal storage at a later date with existing buildup.
> 200 mm
(7.87")
Fig. 4: Mounting of the radar sensor on round vessel tops
In vessels with conical bottom it can be advantageous to mount the
sensor in the center of the vessel, as measurement is then possible
down to the lowest point of the vessel bottom.
Fig. 5: Mounting of the radar sensor on vessels with conical bottom
Do not mount the instruments in or above the filling stream. Make sure
that you detect the product surface, not the inflowing product.
LEVEL TRANSMITTER 8138 • 4 ... 20 mA/HART - two-wire