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Everything about level indicators. Visit the Shop for all spare parts for level indicators FMN and FMK.
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- O P E R A T I O N -
1. Component parts
2. Contents
3. Application & Safety
4. Assembly
5. Adjustment
6. Exchange reset spring
7. Circuit diagram
8. Maintenance
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Exchanging the reset spring

The standard reset spring force is 20p. The two reset springs provided in additio have a resetting force of 60p and 250p.

You should install a stronger reset spring for:
"Empty indicators" in the lower part of larger silos or level indicators in silos with filling materials of higher density (sand, gravel etc.).

  • Remove locking ring 11,
  • Completely unscrew adjustable lining 8, reset spring 7 and tappet 6
  • Now remove tappet 6 from adjustable lining 8. (The reset spring is now removable)
  • Reassemble in reverse order

During reassembly, pay attention to:
The adjustable lining 8 should fit almost flush with the metal wall behind the diaphragm 4, if you reinstall 8, 7, 6 again.

  • Adjust the level indicator afterwards.