Kobold DSS -11, Руководство по эксплуатации, Страница: 4 / 36

DSS
Page 4 DSS K08/0322
4. Regulation Use
Model DSS instruments monitor liquid flows. Only clean, homogeneous liquids of
low viscosity - against which the instrument materials are resistant - should be
monitored. Large switching inaccuracies may occur with highly viscous media.
Large dirt particles can block the float and thus cause faulty signals. Pieces of
ferrite deposited on the embedded float magnet can also cause problems. The
installation of a magnetic filter is recommended to avoid these problems.
The instruments are fitted as follows:
Limit value contacts
The instruments are fitted with one or two adjustable limit value contact(s) for flow
rate monitoring. The contact can be adjusted over the entire measuring range by
taking the hysteresis into consideration.
5. Operating Principle
The Flow Monitor model DSS works according to the well-
known variable area principle, however without the standard
conical measuring tube that expands upwards. Instead the
patented instruments have a cylindrical flow tube that is
slotted conically along its length. A float is situated in this
flow tube that is raised by the medium inflow. Each float
level corresponds to a particular flow. Permanent magnets
that activate the sealed contact (reed switch) arranged
outside are embedded in the float. The contact is operated
non-contacting by magnetic force, that is, the contact is
separated hermetically from the flowing medium.