Campbell CR3000 Micrologger, Руководство оператора

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Section 8. Operation
403
FIGURE 94: Example voltage measurement accuracy band, including
the effects of percent of reading and offset, for a differential
measurement with input reversal at a temperature between 0 to 40
°C.
Measurement Accuracy Example
The following example illustrates the effect percent-of-reading and offset have on
measurement accuracy. The effect of offset is usually negligible on large signals:
Example:
•
Sensor-
signal voltage: ≈5000 mV
•
CRBasic measurement instruction: VoltDiff()
•
Programmed input-voltage range (Range): mV5000 (±5000 mV)
•
Input measurement reversal: True
•
CR3000 circuitry temperature: 10°C
Accuracy of the measurement is calculated as follows:
accuracy = percent
-of-r offset