Eclipse 705 Installation And Operating Manual page 4

MOUNTING
Twin rod (7MB) / Twin cable (7M5 - 7M7) GWR probes
Mounting considerations for 7MB
Nozzle should be DN80 (3") diameter or larger.
from tank bottom
Overfill safe and Overfill proof
Eclipse twin rod GWR probes use software to ignore level
readings in the transitioning zone at the top of the GWR
probe. The maximum level is a minimum of 150 mm (6")
below the process connection. This may include utilizing a
nozzle or spool piece to raise the probe. Twin rod probes
are overfill proof certified but not overfill safe in use.
Eclipse twin cable GWR probes, used in media with low
dielectrics (hydrocarbons, powders) may require the setting
of a blocking distance (zone in which the unit will not mea-
sure) of 300 mm up to 500 mm (12" to 20") depending probe
length. The longer the probe, the longer the blocking dis-
tance will be. Eclipse twin cable GWR probes are not over-
fill proof certified and not overfill safe in use.
Metallic (or any conductive) obstructions in the tanks
Objects in the proximity within 25 mm (1") or closer such as
pipes, support beams, metal ladders etc... may cause erro-
neous readings.
min 25
(1)
Off center rod
Tank or cage wall
4
Size: 47 mm
(1 7/8") or
adjustable
wrench
min. 25 mm (1")
from any metal
object
min 25 mm (1")
Use half open brackets
for twin rod probes.
Mounting considerations for 7M5/7M7
For nozzles < DN80 (3") diameter, the bottom of the inac-
tive section of the probe should be flush with the bottom of
the nozzle or extend into the vessel.
Turbulence
7MB: Customer supplied brackets are recommended per
each 3 m (10') length and have no influence on the mea-
suring performance of 7MB GWR probes. Use the "off cen-
ter" rod to fasten the brackets (see above drawings).
7M5/7M7: It is recommended to secure the probe if signifi-
cant turbulence exists. Optional weights are available to
keep the probe taught. The probe should not make any con-
tact with the metal tank wall. The 7M7 (liquids) probe can be
attached to the bottom of the tank – it is not recommended
to attach the 7M5 (solids) probe at the bottom of the tank.
Stillwell/cages
Min. 3" / DN 80 size nozzles, stillwells or by-pass cages are
required for a good operation. Twin rod/cable probes should
be min 25 mm (1") away from any metal tank wall. 7M5/7M7
have a 76 mm (3") inactive section. For nozzles < 3"/
DN 80, this section should be flush with the bottom of the
nozzle or extend into the vessel.
IMPORTANT:
Twin 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.
For twin cable:
min 25 mm
(1") from any
metal object