Eclipse 705 Installation And Operating Manual page 6

MOUNTING
Single rod (7MF - 7MH - 7MJ) / Single cable (7M1 - 7M2) GWR probes
High Level shutdown and Overfill protection
Special consideration is necessary in any high level shut-
down / overfill protection application where single rod GWR
probes are used. To ensure proper measurement, the guid-
ed wave radar probe should be installed so the maximum
overfill level is at a minimum of 120 mm (4.8") up to
910 mm (36") – blocking distance depending application
below the process connection. Consult factory for further
information.
Metallic (or any conductive) obstructions in the tanks
Objects in the proximity of the probe may cause erroneous
readings.
Distance to probe
< 150 mm (6") Continuous, smooth, parallel,
conductive surface (e.g. metal
tank wall); probe should not touch
tank wall
> 150 mm (6") < 1"/DN25 diameter pipe and
beams, ladder rungs
> 300 mm (12") < 3"/DN80 diameter pipe and
beams, concrete walls
> 450 mm (18") All remaining objects
Turbulence
The bottom of the probe should be stabilized if turbulence
will cause a deflection of more than 75 mm at 3 m (3" at 10')
of length. Optional bottom spacers in TFE (for 7MF) or
PEEK (for 7MJ) should be used to stabilize the probe, in
case turbulence exists. It is recommended to secure the
probe (7M1/7M2) if significant turbulence exists (see above
drawing at right side). Optional weights are available to
keep the probe taught. The 7M1 (liquids) probe can be
attached to the bottom of the tank – it is not recommended
to attach the 7M2 (solids) probe at the bottom of the tank.
The probe should not make any contact with the metal tank
wall.
6
Size: 38 mm
(1 1/2") or
adjustable
wrench
Acceptable objects
Size: 38 mm
(1 1/2") or
adjustable
wrench
Stillwell/cages
Max. 6" / DN 150 size stillwells or by-pass cages or a metal
tank wall within 150 mm (6") of the probe, will allow the unit
to measure accurately in media with dielectrics down to
r 1,9.
ε
Nozzles do not restrict the performance by ensuring the fol-
lowing:
1. Nozzle must be 50 mm (2") or larger diameter.
2. Nozzle inside diameter (A) should be ≥ to nozzle height
(B). If this is not the case, it is recommended to adjust
BLOCKING DISTANCE and/or SENSITIVITY settings.
B
A
Correct installation
IMPORTANT:
Single rod/cable probes should be installed into a metal
tank, stillwell or by-pass cage to meet CE requirements
(EN 61326: 1997 + A1 + A2) electromagnetic compatibility.
When used in a non-metallic vessel flange (metal) mounting
is recommended for optimal performance.
Pipe reducers
should not be used