ALTANA Inmont-Gages - Manual (Page 6)

5
Operation
On Stationary Samples:
Select the proper gage based on expected fi lm
thickness, moving or stationary sample and de-
gree of precision required.
Insure that the gage has been thoroughly cleaned
and dried to remove dried fi lm, dirt, lint or chemi-
cals which may inhibit wetting of the gage surface,
such as silicones, grease, oil or water. Inspect the
gage to be sure it is free of nicks and scratched on
the edges of the wheels.
With models having the rotating scale, the scale
should be rotated so it is well clear of the substra-
te. This is especially important when the substrate
is moving.
Select an area of the sample that is as uniform as
possible. It should be smooth and free of grooves,
pits, ridges or other surface features. The sample
may be fl at or slightly curved.
Place the gage on the surface with the maximum
clearance between eccentric and the outer wheels
down. The gage must be placed squarely on the
surface so both outside wheels are in contact with
the substrate. If the substrate has curvature, the
gage should be placed such that no variance in
plane exists between the outside wheels of the
gage.
Roll the gage smoothly over the sample for one
half revolution in one direction. Lift the gage from
the surface and repeat in the opposite direction.
Determine the ‚thickness by observing the points
at which the coating ceased to be picked up by
the center (eccentric) wheel. These points should
be visually lined up with the readings on the scale
Operation