Factors Affecting Accuracy - Campbell CR300 Series Product Manual

Each trace in the following image contains all twenty PT() mV/V values (left axis) for a given
record number and an average value showing the measurements as percent of final reading
(right axis). The reading has settled to 99.5% of the final value by the fourteenth measurement,
which is contained in variable PT(14). This is suitable accuracy for the application, so a settling
time of 1400 µs is determined to be adequate.

22.11.6 Factors affecting accuracy

Accuracy describes the difference between a measurement and the true value. Many factors
affect accuracy. This topic discusses the effect percent-of-reading, offset, and resolution have on
the accuracy of an analog voltage measurement. Accuracy is defined as follows:
accuracy = percent-of-reading + offset
where percents-of-reading and offsets are displayed in the
(p. 243).
NOTE:
Error discussed in this section and error-related specifications of the data logger do not
include error introduced by the sensor, or by the transmission of the sensor signal to the data
logger.
Analog measurement
22. Tips and troubleshooting 198
specifications