Use the following procedure to test the accuracy of your level:
IMPORTANT: make sure that the working edges of the level and the
surface you are using are completely free of any foreign material
or debris.
For the Level vials:
- 1) Place the level on a flat horizontal surface
- 2) Note the position of the bubble and mark the position of
the level on the surface
- 3) Reverse the level, end for end, making sure the leveling
surface is down. Place it in exactly the same position as marked
in Step 2.
- 4) If bubble rests in the same position as noted in Step 2
the level is true.
For the Plumb vials:
- 1) Place the working edge of the level on a flat vertical
surface
- 2) Note the position of the bubble and mark the position of
the level on the surface
- 3) Reverse the level, working edge for working edge and place
in exactly the same position as marked in Step 2.
- 4) If bubble rests in the same position as noted in Step 2
the level is true.
Johnson levels will hold true unless the actual frame is bent,
twisted or otherwise damaged. Once this happens the level is
usually unrepairable.
We do not offer any repair service for our spirit levels. Almost
all our level models feature easily replacable vial and vial
cover assemblies which we will be happy to send free of charge.
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