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Radar Level Meter EMKOTDR-60| Emkometer,
s.r.o., Na Žižkově 1245, Ledeč n/S., 58401, CZ
tel/fax: 569 721 622 | tel: 569 720 539, 569 721
549
|
CRAMPED SPACES
For the type of level meter
with reference tube
electromagnetic
guided wave propagates inside the reference tube. This wave is
not affected by the ambient environment. So for this type of
radar is not intended protective zone around the electrodes and
the level meter can be used for measurements in
cramped
spaces.
HUMIDITY
It is suitable to run the cable under a cable bushing (obliquely
down in slack) according to Fig. 15 to prevent
penetration of
humidity
. Then the rain and condensing water can flow off
freely.
The cable bushing and connector have to be
sufficiently tight-
ened
to prevent penetration of humidity.
DEEP TANKS AND SILOS
For installation of the level meter with rope electrode
into deep tanks and silos the length of the electrode
must be selected so that
the weight
will be below the
minimum measured level, see Fig. 16.
The distance the electrode from the tank wall
must be
at least 300 mm. Other
wise, the level meter install as
far as possible from the walls, to the middle between
the wall and the vertical inlet, see Fig. 16. It must be
ensured that the rope electrode could not touch the
vessel wall caused by the motion of the medium.
Take care does not exceed the maximum tensile load of
the rope electrode. The value of the max. tensile
strength is specified in chapter "Technical specifica-
tions". High loads can break the rope. Tensile load de
-
pends on the height and shape of the tank, the density
and adhesion of the medium and the rate at which the
tank is emptied.
Fig. 14: Level meter installation with
reference tube in cramped spaces
EMKOTDR-60-20
Fig. 15: Prevention to avoid intrusion of
humidity through cable gland
All types
E – The length of
rope electrode
t –
Measuring range
m –
Dead zone on the beginning
of electrode
z
–
The lengt of weight (110 mm)
d –
The distance from the tank
wall (300 mm)
EMKOTDR-60-20,22,23
E = m + t + z
Fig. 16: Level meter installation with the rope
electrode
