Ametek Surtronic 25, Руководство пользователя

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Chapter 7
Maintenance
Surtronic S25
Calibration
Reference Standard
The sensitivity of the instrument is checked with the reference
specimen supplied. This comprises a ruled surface having an Ra
value accurate to within 4% of the value marked on its mount.
A UKAS calibration certificate can be supplied for this standard.
To provide confidence in results, it is recommended that a
sensitivity check is made at the beginning of each shift.
Sensitivity Check and Adjustment
The procedure for checking and adjusting the pick-up sensitivity is
as follows (for the chisel edge stylus type, see the note at the end
of this section).
1. Place the reference specimen on a flat surface and set up the
instrument to make a traverse across it. Make sure that the
traverse unit body is parallel to the surface of the standard and
that the stylus traverses at right angles to the lay of the grooves.
2. Select the 0.8mm or 0.03in cut-off and the Ra parameter.
3. Make a measurement of the reference specimen and
compare the Ra value from the display with that marked on
the specimen.
4. If it differs by more than 2% use the small screwdriver to turn
the sensitivity adjuster. This is located through the hole which
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