Instrumentation and Control Systems, 3rd Edition

Appendix A

Errors

Abstract

This covers the techniques used for determining errors in measurements.

Keywords

Errors

A.1 Measurement Errors

In Section 1.3 the idea of accuracy and errors associated with instrumentation were discussed. Here we discuss other sources of error and how all such errors affect the accuracy of measurements.

When a physical quantity is measured, the value obtained should not be expected to be exactly what the quantity actually is. With every measured quantity there is associated some error. These errors can arise from:

1. 1. Instrumentation errorsSuch errors are an inherent feature of an instrument and can arise in the manufacture of the instrument from such causes as tolerances on the dimensions of mechanical components and ...