GWR-2000 Four-wire 4-20 mA/HART
925-0335 Rev B
4 Mounting
12
You can find detailed information on the process conditions in chapter "
Technical data
" as well
as on the type label.
4.2 Mounting instructions
Mount the GWR-2000 in such a way that the distance to vessel installations or to the vessel wall
is at least 300 mm (12 in). In non-metallic vessels, the distance to the vessel wall should be at
least 500 mm (19.7 in).
During operation, the probe must not touch any installations or the vessel wall. If necessary, fas-
ten the probe end.
In vessels with conical bottom it can be advantageous to mount the sensor in the center of the
vessel, as measurement is then possible nearly down to the lowest point of the bottom. Keep in
mind that measurement all the way down to the tip of the probe may not be possible. The exact
value of the min. distance (lower dead band) is stated in chapter "
Technical data
".
Fig. 2: Vessel with conical bottom
Plastic vessel/Glass vessel
The guided microwave principle requires a metallic surface on the process fitting. Therefore, in
plastic vessels, etc., use an instrument version with flange (from DN 50) or place a metal sheet
(ø > 200 mm/8 in) beneath the process fitting when screwing it in.
Make sure that the plate has direct contact with the process fitting.
When installing the probes without metal vessel wall, e.g. in plastic vessels, the measured value
can be influenced by strong electromagnetic fields (emitted interference according to EN 61326:
class A).
Use a probe in coax version for applications in liquids.
