12-04-2013, 04:55 PM
Level indicator Menkar KK 80–KK 81
Level indicator.pdf (Size: 726.03 KB / Downloads: 56)
Design and operation
The MENKAR level indicators operate according to the system of
communicating tubes and the float principle.
The medium leaves the vessel and enters the standpipe through
the lower couplings. The measuring float incorporated in the
standpipe indicates the actual fluid level in the vessel.
The float also functions as an indicating float. A float with an
integrated magnet system is required (MENKAR KK 81 and
KK 81) for the activation of the contacts.
Application
Continuous measuring, display and monitoring of levels of fluid
(density of medium from 1 kg/l) in open and closed vessels.
The MENKAR KK plastic designs are employed especially in water
treatment plants, in vessels containing caustic materials from
purification plants and for completely desalinated water and
boiler feed water.
The units can be equipped with magnet activated solenoid
operated touch sensitive switches for control processes (acustic
or optical signals, motor and valve controls or similar devices).
Operating note
The operator of these measuring units is responsible for the
suitability, proper use and corrosion resistance of the used
materials with regard to the measuring material. In particular. it
must be ensured that the materials selected for the parts of the
measuring unit coming into contact with the medium are suitable
for the process media to be used.
The unit may only be used within the pressure and voltage limits
specified in the operating instructions. Before replacing the
measuring tubes, check that the unit is free from hazardous
media and pressures.
Touch sensitive switch Type K 18
The bistable magnetic contact system K 18 is employed to
indicate the position of the magnet float in the standpipe. It
incorporates a gas reed contact which is activated via the
magnetic field of the float. The K 18 is sensitive to excessively
high current load (max. 500mA) due to the low spring tension of
the contact reeds. High self induction voltage can be generated
when inductive switchgears, for example relays, are switched off.
Therefore precautions are recommended to guarantee a long
service life (see separate data sheet magnetic contact system K
18).