(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.
6.1.3.7 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 analogue voltage measurement. Accuracy is defined as follows:
accuracy = percent-of-reading + offset
where percents-of-reading and offsets are displayed in the Analogue measurements
specifications (p. 166).
NOTE:
Error discussed in this section and error-related specifications of the datalogger do not
include error introduced by the sensor, or by the transmission of the sensor signal to the
datalogger.
6. Measurements 56
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