SKF LINCOLN P203, Original Assembly Instructions

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EN
4. Technical data
4
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951-171-021
Version 02
4.5 Functioning principle of the intermittent low-level indication
The intermittent low-level indication operates free of contact. Its main components are the following:
○
firmly positioned magnetic switch (I) inside of the reservoir bottom
○
flexible guide plate (II) connected to the stirring paddle with a magnet (III) and a control cam (IV)
If the reservoir is filled with a lubrication grease suitable for the intermittent low-level indication and the pump is operating, then the guide plate (II) is de-
flected by the resistance of the lubrication grease. As a consequence the magnet (III) connected to the guide plate (II) is moved on its inner circuit and
cannot
trigger a pulse at the magnetic switch (I) with its magnetic field. A control cam (IV) positively guides the magnet together with the pivoted guide plate towards
the outside during each revolution. As soon as the guide plate leaves the control cam, the lubricant's resistance pushes the guide plate together with the
magnet to the inside again.
As soon as the lubricant inside the reservoir has fallen to that level that the lubricant's resistance is no more sufficient to further deflect the guide plate (II),
the magnet (III) remains on the outer circuit and triggers a pulse each time it slides across the magnetic switch (I). If during an operating cycle the magnet
(III) slides across the magnetic switch (I) six times, a low-level signal is sent by the control printed circuit board of the pump. For programming of the external
control of the pump, see corresponding chapter in these instructions.
Perspective representation Schematic representation
Magnet on inner circuit Magnet on outer circuit
I
II
III
I
I
III
IV