April 2011
Intermediate to advanced
312 pages
9h 32m
English
Content preview from Interfacing PIC Microcontrollers
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Many factors may contribute to sensor error: limitations in linearity, accuracy,
resolution, stability and so on. Accuracy is evaluated by comparison with a stan-
dard. A temperature of 25°C is only meaningful if Celsius is an agreed scale, in
this case based on the freezing and boiling points of water. Resolution is the de-
gree of precision in the measurement: 25.00°C (⫹/⫺0.005) is a more accurate
measurement that 25°C (⫹/⫺0.5). However, this precision must be justified by
the overall precision of the measurement system. Poor stability may appear as
drift, a change in the sensor output over time. This may be caused by short-term
heating effects ...