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Appendix E. Verifying Measurement OTA's
Verify measurement OTA's each time you use them to ensure that no mechanical
damage has degraded their accuracy. MViQ systems are shipped with a measurement
verification block. This tool lets you verify the accuracy of measurement OTA's. It
contains optical measurement targets whose accuracy is traceable to the United
States National Institute of Standards and Technology (NIST) measurement standards.
These are the part numbers for the verification blocks used with the MViQ:
VER2400C
For 4.0 mm systems
VER2600D
For 6.1 mm systems
VER2600E
For 6.1 mm systems
XLG3TM84VER
For 8.4 mm systems
To Verify a 3DPM Measurement Tip:
Securely attach a 3DPM tip and then
1
– Navigate to the Measurement & Annotation section of the Settings menu and select
Verify.
2
– Insert the tip into the verification block and follow the on-screen prompts to
complete the test. The system will automatically check the tip’s accuracy, check for
contamination on the gratings, and verify the health of the tip LEDs. Note that the results
of this automatic verification are logged in a file for troubleshooting (if required).
Note: Accuracy may also be checked by performing manual length measurements
between the crosshairs.
To Verify a 3D Stereo or Stereo Measurement Tip:
Securely attach a 3D Stereo or Stereo tip and then
3
– Insert the tip into the appropriate port of the verification block and position the tip
to center the target crosshairs in the image.
4
– Freeze the image, select Stereo, and then identify the serial number or the attached
tip.
Note: 3D Stereo OTA's include a + 3D designation on the soft key
