User’s & Technical Manual –
LEVEL TRANSMITTER LTR7000
GELEC
Industrial Electronics
PAGE
15
MAGNETIC FLOAT / APPLICATION TANK
The shape of the tank must allow a
linear
relationship between the fluid volume and the
measured level
. Otherwise a proper software must be developed, which will automatically
calculate the filled volume of the tank, depending on the output of the transmitter.
Since there is no direct contact between any part of the LTR7000 and the measured fluid,
the system supports both atmospheric and high-pressure applications. The measuring
chamber’s material must be
non-magnetic
.
It is recommended to
use mechanical stops inside the measuring chamber
(ideally
adjustable)
, in order to restrict the float’s magnet within
the LTR7000 active measuring
segment limits, even if the fluid level gets out of these limits in some process stages (tank
draining, overflowing etc.).
The magnetic float must
move freely during level alterations and not being blocked
by
the measuring chamber, or possible sediments, dirt, dregs etc. Ensure that the float
installation environment allows proper and smooth vertical movement. Partial or full
blockage will cause faulty/misleading readings.
A small magnet (south pole) can be attracted from the incorporated float and stick outside
the measuring chamber following its movement.
This will
‘
visualize
’
the
float’s
position
and behavior inside the chamber
and help you to easily confirm the proper correlation
between the level and the float.
The measuring chamber should be cleaned and inspected regularly, depending on the
nature of the measured fluid and the process characteristics. Fluids that create sediments
over time, are most likely to need maintenance more frequently.
