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What role do the operators of height gages play in the accuracy of the final measurement?

Human error is unavoidable in any profession. Similarly, in precision measurement, the height gage operator is a crucial factor in its accuracy and success. This is particularly salient when an operator is working with a manual height gage. The speed and pressure with which a part is touched onto a height gage can significantly alter the outcome of the measurement and introduce variability. Due to this potential for error, operators must go through very regimented and precise training in order to properly learn how to operate a manual height gage. The icons on a height gage have been specifically developed to be intuitive and instructive for use in order to aid the operation of the height gage. Finally, the more electronic the height gage, the less pressure that falls onto the operator, resulting in the minimization of error in accuracy due to operator involvement.
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