CR300-Series Datalogger
43
Input Limits:
–100 to 2500 mV
Maximum Input Voltage
SE 1-2:
–6 V, +9 V
SE 3-6:
±17 V
DC Common-Mode Rejection:
>120 dB with input reversal
≥90 dB without input reversal
Normal-Mode Rejection:
>71 dB at 60 Hz
>74 dB at 60 Hz
Input Current:
See TABLE
Measurement Input Resistance and
(p. 44)
1
Accuracy specification does not include sensor error or measurement noise.
2
Assumes input reversal for differential measurements.
3
Analog Voltage Measurement Accuracy Offsets
TABLE 7-1. Analog Voltage Measurement Range and Resolution
f
N11
(Hz)
Range
2
(mV)
Typical Effective Resolution
3
Differential
Measurements
with Input
Reversal
Differential
Measurements
without Input
Reversal
RMS (µV) bits RMS (µV) bits
4000
–100 to +2500
23
16.8
33
16.3
–34 to +34
3.0
14.5
4.2
14.0
400
–100 to +2500
3.8
19.4
5.4
18.9
–34 to +34
0.58
16.8
0.82
16.3
50/60
–100 to +2500
1.6
20.6
2.3
20.1
–34 to +34
0.23
18.2
0.33
17.7
1
First notch frequency
2
Range overhead of ≈10% on all ranges guarantees that full
-scale values will not
cause overrange.
3
Effective resolution (ER) in bits is computed from the ratio of full-scale range to
RMS noise, where RMS noise is the standard deviation of many measurements of
grounded inputs.
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