What is the process of calibration?
Calibration is the process of configuring an instrument to provide a result for a sample within an acceptable range. The instrument can then provide more accurate results when samples of unknown values are tested in the normal usage of the product.
What tool is used to calibrate a micrometer?
gage block
A gage block is used to calibrate an unknown micrometer. The “unknown” is the micrometer and the “known” is the gage block being used. This gage block must have a certificate of traceability to the National Institute of Standards and Technology (NIST).
Why do micrometers need to be calibrated?
Micrometers need to be calibrated to ensure their accuracy. Because they are used for critical measurements, it is important to make sure that any readings taken with the micrometer are correct.
Is standard for micrometer calibration?
The standard used in calibrating measuring gages must possess an accuracy greater than a 4:1 ratio over the accuracy of the gage being calibrated. The accuracy of a gage block is typically ±0.000002 inch, and the accuracy of a micrometer is typically ±0.0001 inch. This exceeds the 4:1 ratio.
How often should the calibration of a micrometer be checked?
A micrometer can be calibrated on-site anytime, at least in the most basic and important way (if not comprehensively), by measuring a high-grade gauge block and adjusting to match. Even gauges that are calibrated annually and within their expiration timeframe should be checked this way every month or two, if they are used daily.
How do you calibrate a microscope?
Calibrating a Microscope. To properly calibrate your reticle with a stage micrometer, align the zero line (beginning) of the stage micrometer with the zero line (beginning) of the reticle. Now, carefully scan over until you see the lines line up again. You can then use a simple ratio to determine the value that each line represents in your reticle.
What is calibration of microscope?
Microscope Calibration: Definition. Using a microscope that’s calibrated means that the same results will be produced on the exact same sample under the same conditions if you were to use an entirely different microscope that was also calibrated.