11
11 - 1
No. 99MBB091A
MAINTENANCE AND
INSPECTION OF SJ-301
11.1 Daily Care
Each time the measurement job has been completed store the Drive/Detector unit in the
Display unit. Store the complete SJ-301 after checking it thoroughly so that the next measure-
ment job can be started without incident.
■ Checking for normal operation
To judge whether the SJ-301 is in normal operation, after calibrating it with the supplied
roughness specimen (Order No.178-601) check that the dispersion of Ra values is within
±0.05 µm, which are obtained from repeated measurements of the same point.
However, if the measured point on the supplied roughness specimen (Order No.178-601) is
changed during repeated measurement, the dispersion of ±0.09 µm (±3% of the nominal
value) included in the roughness specimen will be added to that of the Ra values. Care should
be exercised.
NOTE This dispersion in the roughness specimen is a value obtained under the conditions
that there are no dent and abrasion on the detector stylus tip and no scratch and
abrasion on the specimen surface.
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