Campbell CR300 Series Operator's Manual page 53

Input Limits:
Maximum Input Voltage
SE 1-2:
SE 3-6:
DC Common-Mode Rejection:
Normal-Mode Rejection:
Input Current:
1 Accuracy specification does not include sensor error or measurement noise.
2 Assumes input reversal for differential measurements.
3 See TABLE 7-2, Analog Voltage Measurement Accuracy Offsets
TABLE 7-1. Analog Voltage Measurement Range and Resolution
f 1 Range 2
N1
(Hz) (mV)
–100 to +2500
4000
–34 to +34
–100 to +2500
400
–34 to +34
–100 to +2500
50/60
–34 to +34
First notch frequency
1
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.
CR300-Series Datalogger
–100 to 2500 mV
–6 V, +9 V
±17 V
>120 dB with input reversal
≥90 dB without input reversal
>71 dB at 60 Hz
>74 dB at 60 Hz
See TABLE 7-4, Analog Voltage
Measurement Input Resistance and
Current
(p. 44)
Typical Effective Resolution
Differential Differential
Measurements Measurements
with Input without Input
Reversal Reversal
RMS (µV) bits RMS (µV)
23 16.8 33
3.0 14.5 4.2
3.8 19.4 5.4
0.58 16.8 0.82
1.6 20.6 2.3
0.23 18.2 0.33
3
bits
16.3
14.0
18.9
16.3
20.1
17.7
43