Multiplexed Measurement Time:
These are not maximum speeds. Multiplexed denotes circuitry inside the data logger that
switches signals into the ADC.
Measurement time = INT(multiplexed measurement time • (reps+1) + 2ms
Differential
with Input Reversal
Single-Ended or Differential
without Input Reversal
Example fN1
1
(Hz) Time
2
(ms) Time
2
(ms)
15000 2.8 1.4
60 36 18.1
50 42.07 21.3
5 402.7 201.4
1
Notch frequency (1/integration time).
2
Default settling time of 500 µs used.
See also Voltage measurements (p. 64).
11.5.2 Resistance measurements 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 or for direct
resistance measurements using current excitation. Excitation polarity reversal is available to
minimize dc error. Typically, at least one terminal is configured for excitation output. Multiple
sensors may be able to use a common excitation terminal.
Accuracy:
Assumes input reversal for differential measurements RevDiff and excitation reversal RevEx
for excitation voltage <1000 mV and excitation current < 1 mA. 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.
l 0 to 40 °C: ±(0.02% of voltage measurement + offset)
l –40 to 70 °C: ±(0.025% of voltage measurement + offset)
l –55 to 85 °C (XT): ±(0.03% of voltage measurement + offset)
11. CR6 Specifications 218
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