FISCHER Mess- und Regeltechnik GmbH
Commissioning | 4
BA_EN_NK10_H_ST4-C
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4 Commissioning
4.1 Safety guidelines
WARNING
Faulty device
The instrument must be decommissioned and secured against inadvertent re-
operation if a situation arises in which it must be assumed that safe operation is
no longer possible.
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Reasons for this assumption could be:
a) Visible damage to the device.
b) Failure of the electrical function.
c) Long storage at temperatures over 85°C.
d) Considerable strain due to transport.
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Repairs may be carried out by the manufacturer only. A professional single
conformity inspection as per DIN EN 61010, Part 1, must be carried out be-
fore the instrument can be re-commissioned. This inspection must be per-
formed at the manufacturer's location. Correct transport and storage of the in-
strument are required.
4.2 Generalities
All electrical supply, operating and measuring lines and the pressure connec-
tions must have been correctly installed before starting operation and the flange
connections must have been correctly made. All supply lines are arranged so
that there are no mechanical forces acting on the device.
NOTICE! Leak test
The leak tightness of the flange connection must be tested in the course of the
system leak tests.
4.3 Function test
There is a test button outside the pressure chamber with which a function check
as per DIN 4754-3 can be made without lowering the fill level. When pressed,
the body of the swimmer is moved against its buoyancy.
The factory default switching point of switch S1 (clamps 1, 2, 3) is set so that it
switches when the swimmer rod is horizontal. The optional warning switch S2
switches ca. 2.5 mm before S1.
Check the function of the unit:
▪ Check the switching function (with the aid of the test button) in combination
with the following components.
▪ Check the swimmer via the buoyancy behaviour after pressing the test but-
ton.
If the result of the function test is negative, the fill level limiter must be taken out
of operation and the process must be kept safe by other means.
