ALTANA Circular Drying Time Recorder - Manual (Page 6)

5
Operation
and the corresponding graduations on the rim of
the circle to be located with great precision.
4. Portability: Compact in design, the Circular
Recorder is 4“ in diameter and 4½ high, and
weighs about 1½ pounds. It can be operated
on a laboratory bench, in a small environmental
chamber, or in an oven at a temperature of up to
170°F.
5. Easy Maintenance: There is nothing to clean
except the stylus. When it begins to wear fl at, it
should be immediately replaced; otherwise, the
pressure at the contact point will decrease as the
contact area increases. The true verticality of the
stylus should be established with the right-angle
guide provided. The motor lubricant is sealed in
and requires no attention. An occasional drop
of oil should be placed in the pivot pin of the
horizontal arm.
6. Small Test Area: Applying wet fi lms on long or
large glass plates or other panels is not necessary
since the scribed circle is only 2“ in diameter. Any
fl at panel having a test area at least this size can
be used.
7. Easy Panel Preparation: Panels of any desired
composition and thickness may be employed. If
the panel is of the same material that the coating
will be applied to or as been formulated for, the
actual drying characteristics of the coating system
can be studied. The various stages of drying are
greatly infl uenced by the actual thickness of the
applied fi lm. The BYK-Gardner Film Casting Knife
lays wet fi lms of any thickness from 0-250 mils
and is available in widths from 2“ to 12“.
8. Different Motor Speeds: The greatest precision
is obtained when the motor speed and template