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Section 8. Operation
352
Measurement Accuracy
Read More For an in-depth treatment of accuracy estimates, see the
technical paper Measurement Error Analysis soon available at
www.campbellsci.com/app-notes.
Accuracy describes the difference between a measurement and the true value.
Many factors affect accuracy. This section discusses the affect percent-or-
reading, offset, and resolution have on the accuracy of the measurement of an
analog voltage sensor signal. Accuracy is defined as follows:
accuracy = percent
-of-r offset
where percents-of-reading are tabulated in the table Analog Voltage Measurement
Accuracy
(p. 352),
and offsets are tabulated in the table Analog Voltage
Measurement Offsets
(p. 352).
Note Error discussed in this section and error-related specifications of
the CR3000 do not include error introduced by the sensor or by the
transmission of the sensor signal to the CR3000.
Analog Voltage Measurement Accuracy
1
0 to 40 °C
–25 to 50 °C
–55 to 85 °C
2
±(0.04% of r
offset)
±(0.07% of r
offset)
±(0.09% of r
offset)
1
Assumes the CR3000 is within factory specifications
2
Available only with purchased extended temperature option (-XT)
Analog Voltage Measurement Offsets
Differential
Measurement
With Input Reversal
Differential
Measurement
Without Input
Reversal
Single-Ended
1.5 • Basic Reso
1.0
µ
V
3 • Basic Reso
2.0
µ
V
3 • Basic Reso
3.0
µ
V
Note — the value for Basic Resolution is found in the table Analog Voltage
Measurement Resolution
(p. 352).
Содержание CR3000 Micrologger
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Страница 200: ...Section 7 Installation 200 FIGURE 42 Running Average Frequency Response FIGURE 43 Running Average Signal Attenuation ...
Страница 485: ...Section 8 Operation 485 8 11 2 Data Display FIGURE 110 Keyboard and Display Displaying Data ...
Страница 487: ...Section 8 Operation 487 FIGURE 112 CR1000KD Real Time Custom ...
Страница 488: ...Section 8 Operation 488 8 11 2 3 Final Storage Data FIGURE 113 Keyboard and Display Final Storage Data ...
Страница 489: ...Section 8 Operation 489 8 11 3 Run Stop Program FIGURE 114 Keyboard and Display Run Stop Program ...
Страница 491: ...Section 8 Operation 491 FIGURE 116 Keyboard and Display File Edit ...
Страница 495: ...Section 8 Operation 495 Low power standby whenever possible Low power bus sets bus and modules to low power ...
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Страница 564: ...Section 11 Glossary 564 FIGURE 126 Relationships of Accuracy Precision and Resolution ...
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