Resistance Measurement Specifications - Campbell CR300 Series Product Manual

Accuracy (does not include sensor or measurement noise):
0 to 40 °C: ±(0.04% of measurement + offset)
l
–40 to 70 °C: ±(0.1% of measurement+ offset)
l
Voltage Measurement Accuracy Offsets:
Differential
Range (mV)
with Input Reversal
–100 to +2500
–34 to +34
Measurement Settling Time: 20 µs to 600 ms; 500 µs default
Multiplexed Measurement Time:
These are not maximum speeds. Multiplexed denotes circuitry inside the data logger that
switches signals into the ADC.
Measurement time = (multiplexed measurement time + settling time) • reps +0.8 ms
with Input Reversal
1
Example fN1 (Hz)
4000
400
50/60
1
Notch frequency (1/integration time).
2
Default settling time of 500 µs used.
See also Voltage measurements

19.5.2 Resistance measurement specifications

The data logger makes ratiometric-resistance measurements for four- and six-wire full-bridge
circuits and two-, three-, and four-wire half-bridge circuits using voltage excitation. Typically, at
least one terminal is configured for excitation output. Multiple sensors may be able to use a
common excitation terminal.
Typical Offset (µV RMS)
Differential
without Input Reversal
±20
±6
Differential Single-Ended or Differential
without Input Reversal
2
Time (ms)
2.9
14.6
103
(p. 68).
Single-Ended
±40 ±60
±14 ±20
2
Time (ms)
1.4
7.3
51.5
19. CR300 series Specifications 189