Campbell CDM-A100 Series, Инструкция по эксплуатации

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CDM-A100 Series
12
6.1 Voltage Measurements – Specifications
Voltage measurements use a 24-bit Analog-to-Digital (A-to-D) converter. One
channel at a time is measured in numeric succession. Differential and single-
ended channels can be mixed.
Terminals
Differential Configuration
CDM-A108: DIFF 1H/1L – 8H/8L
CDM-A116: DIFF 1H/1L – 16H/16L
Single-Ended Configuration
CDM-A108: SE 1 – 16
CDM-A116: SE 1 – 32
Range: See TABLE D-1 , Analog Voltage
Measurement Range and Resolution
(p. D-1)
Accuracy
1
0 to 40 °C: ±(0.04% of R Offset
2
)
–40 to 70 °C: ±(0.06% of R Offset
2
)
–55 to 85 °C: ±(0.08% of R Offset
2
)
Resolution: See TABLE D-1 , Analog Voltage
Measurement Range and Resolution
(p. D-1)
Speed: See TABLE 6-2 , Analog Voltage
Measurement Speed
(p. 13)
See also Section 8.2 , Fast Measurements
(p. 25)
Input Resistance: >20 G
Ω
Input Limits: ±5 Vdc
Maximum Input Voltage: ±20 Vdc
DC Common-Mode Rejection: >120 dB with input reversal
≥
86 dB without input reversal
Normal-Mode Rejection: >70 dB at 60 Hz
Input Current: ±3 nA typical at 25 °C
±12 nA maximum at 50 °C
±100 nA maximum at 85 °C
1
Accuracy specification does not include sensor error or measurement noise.
2
See TABLE 6-1 , Analog Voltage Measurement Accuracy Offsets
(p. 13)