Period-Averaging Measurement Specifications; Current-Loop Measurement Specifications - Campbell CR300 Series Product Manual

Accuracy:
Assumes input reversal for differential measurements RevDiff. Does not include bridge resistor
errors or sensor and measurement noise.
Ratiometric accuracy, rather than absolute accuracy, determines overall measurement accuracy.
Offset is the same as specified for analog voltage measurements.
0 to 40 °C: ±(0.05% of voltage measurement + offset)
l
–40 to 70 °C: ±(0.06% of voltage measurement + offset)
l

19.5.3 Period-averaging measurement specifications

PeriodAvg()
Use
on a single-ended channel.
Terminals: SE1-SE4
Accuracy: ±(0.01% of measurement + resolution), where resolution is 0.13 µs divided by the
number of cycles to be measured
Voltage Range: 0 to 3.3 V
Minimum Pulse Width: 2.5 µs
Voltage Threshold: Counts cycles on transition from <0.9 VDC to >2.1 VDC
See also Period-averaging measurements

19.5.4 Current-loop measurement specifications

Two analog inputs terminals may be configured as independent, non-isolated 0-20 mA or 4-to-
20 mA current-loop inputs referenced to ground. One channel at a time is measured. Current is
measured using a 24-bit ADC.
Terminals: SE1-SE2
Range: 0 to 25 mA
Accuracy:
0 to 40 °C: ±0.14% of reading
l
–40 to 70 °C: ±0.26% of reading
l
See also Current-loop measurements
to measure the period (in microseconds) or the frequency (in Hz) of a signal
(p. 70).
(p. 78).
19. CR300 series Specifications 190