Starrett UM3202, User Manual

Page: 9 / 64

PKG08769-UM3202 9
ENGLISH
PRECAUTIONS WHEN USING THE CALIPER
• Before using the instrument, clean the measuring jaws and the
graduated scale with a smooth cloth or chamois.
• Do not expose the caliper to direct sunlight or extreme temperatures.
• Avoid mechanical shocks or abrupt movements, which might damage
the instrument.
• Do not disassemble the caliper.
• Do not use compressed air on the caliper; this can contaminate the rack.
• Do not wash or immerse the caliper in any liquid.
• For a good working caliper, always keep the rack clean. Use a small
soft brush or paint brush for cleaning.
• Keep the caliper clean and dry, and avoid handling with oily hands.
• Store caliper in its own package; avoid leaving it out with other tools.
PRECAUTIONS WHEN MEASURING
• Do not measure a rotating part; it is
dangerous and causes the faces in
contact to wear.
• Do not apply excessive pressure
when measuring (fig. 1)
Fig. 1
Parallax Error : Be careful when measuring to avoid the parallax error
(Δx). This error occurs when the observation point is not perpendicular to
the display (fig. 2A). Take the reading perpendicularly to the dial display
(3) (fig. 2B).
Fig. 2A Fig. 2B