Types of Systematic Error
Systematic error is a type of measurement errors. Systematic error is controllable error and hence it is also known as controllable error. These errors have definite magnitude and these are repeated while taking readings. These errors cannot detect by taking multiple reading because they are repeated every time. These types of error are detected by attempting as a analyse purpose. After detecting errors these errors are resolve according to type of error, like if error detect in calibration of instrument then again calibrate this instrument by proper or accurate process. According to different causes of errors, systematic errors are classified in various types and these are as follow.
- Environmental Errors
Errors occur due to pressure, temperature, humidity, dust, vibrations act externally to measuring devices are known as environmental errors. Typical example of environmental error is that change in dimensions due to temperature.
- Instrument Errors
As per name instrument errors are the errors in instrument. There different causes of instrument errors like inherent fault in design of instrument and manufacturing of instrument, misuse of instrument, etc... These errors can be avoid by selecting proper instrument for a parameter to be measured, proper maintenance of instrument, use proper calibrated instruments against standard, etc…
- Observational Errors
Observational errors are occurring due to observer. Observational errors are occur due to various reasons like lack of skill of observer, careless operating, parallax error, mistake in scale reading, etc…
- Operational Errors
Operational errors occur due to misuse of instrument and wrong operational techniques. These errors can be avoided by correct operational techniques and proper use of instruments.