Olympus Magna-Mike 8600, Руководство пользователя

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DMTA-10026-01EN, Rev. D, January 2015
Basic and Multipoint Calibration 89
measurements immediately. A manual Q-CAL may be performed as often as desired.
If the test material is very thick, or requires great accuracy, the operator can choose to
perform a manual Q-CAL prior to each new measurement.
When the Magna-Mike 8600 probe is being used hand-held to scan large objects, and
not in the probe stand, it will be necessary to perform a manual Q-CAL when the
orientation of the probe changes. This will compensate for changes in the ambient
magnetic field around the probe due to probe orientation. For best results, perform
the calibration while the probe is in the probe stand, and then press the Q-CAL button
once the probe is pointing in the same orientation as the measurements will be made.
For best measurement results, perform Q-CAL as often as the orientation of the probe
changes.
For best results, keep the probe in the same position during the Q-CAL as it will
remain during subsequent measurements.
4.8.4 Periodic Verification
The Magna-Mike 8600 is classified as an operator-calibrated instrument. Olympus
recommends establishing periodic checks to verify that acceptable accuracy is being
maintained while the gage is in use.
Use care when handling the thickness standards provided by Olympus. The probe tip
and steel target balls are significantly harder than the brass and aluminum disks that
are located inside the fixtures. Excessive force will dent the disk’s surface. These dents
may induce errors in thickness values during calibration. To obtain replacement disks,
contact Olympus. Other operator-supplied thickness standards may be used, but care
must be taken that these are independently and accurately measured.
4.8.5 Traceability
Due to the operator-calibrated status of the Magna-Mike 8600, traceability to the
National Institute of Standards and Technology (N.I.S.T.) may be conferred on the
gage by using documented and certified standards from an appropriate metrology
laboratory.
NOTE