1)Instrumental Errors
These errors may be Occurs due to wrong construction,
calibration of the measuring instruments. These types of error may be arises
due to friction or may be due to hysteresis
Reason:
poor maintenance,faults in construction,friction
wear,assembly error.
2)Environmental
Errors:
This type of error arises due to external natural condition
effect on the instrument.
reason:
temperature
pressure
humidity
magnetic field
Remedial action:
Maintain the natural quantity constant .all measurement
should be taken in the well laboratory.
3)Observational
Errors
these types of error caused due to observers observation
reasons:
Parallax error
wrong conversion of unit
wrong scale reading
personal bias to take higher or lower reading.
4)Theoretical.
Due to simplification of the model system or approximations
in the equations describing it.
5)Operational error
these are the errors occurs due to poor techniques of the operational process
these are due to wrong places of the parts in odd line.eg.thermometer
situated without dipping in liquid.
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