In measurement, an instrumentation is needed as a physical way to determine a quantity / variable. Without the help of this instrument, a person cannot know or determine the value of a quantity. So thus the instrument is defined as a tool used to determine the value or magnitude of a quantity. An electronic instrument can be a device whose construction is simple and relatively uncomplicated as well as a basic measuring instrument for direct current.
In measurement, several terms are used which are defined as follows:
- Instrument: A tool for determining the value or magnitude of a quantity
- Accuracy: the closest price to which an instrument reading is closer to the true value of the measured variable
- Accuracy (Precision): A measure of the ability to obtain similar measurement results
- Sensitivity: Comparison of the output signal or instrument response to the change or variable being measured
- Resolution: The smallest change in the measured value to which the instrument will respond (Response)
Error (error): The deviation of the measured variable from the actual price.
The types of errors that occur.
No measurement results in perfect accuracy. The first step needed to reduce mistakes is to study them. Mistakes can occur for various reasons and are generally divided into three main types, namely:
General errors (gross-errors): are generally caused by human error, including misread of measuring instruments, incorrect adjustments and use of inappropriate instruments and misinterpretation
Systematic errors: caused by deficiencies in the instrument such as damage or wear parts and environmental influences on equipment or usage.
Random errors: Caused by causes that cannot be immediately known because changes in parameters or measurement systems occur randomly.
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