8/19/03
910-198E
Model 8500
Page 3-7
Use care when handling the thickness standards (Blue Labeled
Reference Thickness Fixture) provided by Panametrics-NDT. The
steel probe tip and steel target balls are significantly harder than the
brass and aluminum disks that are located inside the blue labeled
fixtures. Excessive force will dent the disk’s surface. These dents
may induce errors in thickness values during calibration. To obtain
replacement disks, contact Panametrics-NDT. Other operator-
supplied thickness standards may be used, but care must be taken that
these are independently and accurately measured.
3.4
Traceability
Due to the operator-calibrated status of the Magna-Mike 8500,
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.
Use a set of traceable standards to periodically verify thickness
measurements. Record the displayed thickness readings to verify that
the Magna-Mike 8500 is operating at its expected accuracy (see
Appendix IV). Verifications may be made on a monthly or annual
basis depending upon the user's judgment.
Panametrics-NDT offers sets of traceable standards (part#: 80CAL-
NIS). These sets are measured by a traceable metrology laboratory,
engraved and labeled with their true thickness, and delivered with
appropriate certificates. The set may be periodically re-certified by any
qualified metrology laboratory providing they (1) use a ball or
rounded-anvil style caliper, and (2) measure within 1/16" of the disk
center.
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