Kobold PSE series, Руководство по эксплуатации

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PSR/PSE
PSR/PSE K23/0322 page 15
Contact protection
The reed contact may be damaged if the switch ratings are exceeded, especially
while switching inductive or capacitive loads. This can cause unsafe conditions.
By using a contact protection/isolation relay (e.g.: Model MSR 10), this problem
can be overcome and the lifespan and switch rating of the reed contact can be
extensively increased.
10. Maintenance
In cases the measured flow medium is not polluted, the PSR/PSE will remain
virtually maintenance-free. Ferritic (iron) particles in the medium may deposit on
the magnet, which can lead to problems. Bigger dirt particles can lead into
blocking of the balance arm. To avoid those conditions, we recommend the
installation of a magnet filter (e.g.: Magnet Filter model MFR).
Depending on the amount of dirt present in the medium, we recommend the
instrument to be checked and cleaned regularly.
Cleaning of the instrument
The device requires regular maintenance and cleaning. The intervals are
determined by the operator according to the environmental stresses on site. It
should proceed as follows:

Shut-off the flow through the instrument.

Ensure that there is no flow through the pipe and that the pipe is empty and
not under pressure.

Loosen the sleeve nut with a wrench (hex size 30) (only PSR-..).

The upper switch housing and paddle arm can then be removed for cleaning.

When cleaning the paddle arm, check that the flat spring is not damaged or
bent.

Prior to reinstallation, check that the o-ring is placed correctly in the lower
housing. Dirt particles on the o-ring will lead to sealing problems.

Insert the leaf-spring/paddle assembly into the lower housing and replace the
upper housing. Note that the suspension disk of this assembly must be
correctly positioned within the recesses of the upper and lower housings.

Tighten the sleeve nut. Check that the upper half does not turn with the nut.

Check seal tightness.