NIST-DOE CALIBRATION COOPERATION LOWERS UNCERTAINTY FOR STEP GAGE CALIBRATION.
A NIST scientist, and the staff of the Department of Energy (DOE) Oak Ridge Metrology Center have analyzed 5 years of measurements of their check standards and customer step gages and revised the error budget for the calibration. The uncertainty is length dependent, but as an example--for a full meter, the uncertainty is 0.4 [micro]m, a significant reduction from the previous 0.7 [micro]m. The reduction is primarily due to a number of small process improvements. The new uncertainty is available on most one-dimensional calibrations up to 1.5 m.
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|Publication:||Journal of Research of the National Institute of Standards and Technology|
|Article Type:||Brief Article|
|Date:||Sep 1, 2000|
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