We
can provide certificates of calibration with N.I.S.T.
traceability (National Institute of Standards and Technology) on our line of stage micrometers and eyepiece
reticles in this section (although reticles rarely benefit
from calibration).
By
calibration, we mean that after the part is manufactured it is
measured with a precision piece of equipment that has itself
been calibrated with a N.I.S.T. traceable test standard. These
measurement results are then provided with the part.
PRICING
Some
of the stage micrometers are
offered as standard products in a calibrated version so please
refer to the individual part number for pricing. For all others,
the cost is $20.00 per point, 10 point minimum. A "point" is
defined as one measurable dimension. For example, if you had a 1mm
scale with sub-divisions every 0.1mm, and you wanted every
division line to be calibrated, that would consist of 10
calibration points (0 to .1mm, 0 to .2mm, etc.).
CERTIFICATE OF CALIBRATION
After
calibration, the stage micrometer or reticle is shipped
with a certificate of calibration showing the actual dimensions
measured, calibration equipment used, environmental conditions,
N.I.S.T. traceable test number and certificate serial no. This
serial no. is also engraved into the glass of the stage
micrometer.
ACCURACY
The
in-house specification of the chrome deposition process on our micrometers is an accuracy of +/-
0.005mm end-to-end. When calibrated, the calibration
measurements have an overall accuracy of +/- 0.0004mm and a
total estimated uncertainty of +/- 0.0006mm. The Calibration Department is
accredited to ISO/IEC 17025.
