Measurement Computing PCI-DAS6034 User Manual page 38

PCI-DAS6034 & PCI-DAS6035 User's Guide
Accuracy
200 kS/s sampling rate, single channel operation and a 15-minute warm-up. Accuracies listed
are for measurements made following an internal calibration. They are valid for operational
temperatures within ±1°C of internal calibration temperature and ±10°C of factory calibration
temperature. Calibrator test source high side tied to Channel 0 High and low side tied to
Channel 0 Low. Low-level ground is tied to Channel 0 Low at the user connector.
Table 1 – Absolute Accuracy
Range
±10V
±5V
±500mV
±50mV
Table 2 – Absolute Accuracy Components - All values are (±)
Range % of
Reading
±10V 0.0239
±5V 0.0262
±500mV 0.0467
±50mV 0.0685
1. Averaged measurements assume averaging of 100 single-channel readings
Each PCI-DAS6035/6034 is tested at the factory to assure the board's overall error does not
exceed accuracy limits described in Table 1 above.
Table 3 – Differential non-linearity
All Ranges
System Throughput
Condition
1) Single channel, single input range
2) Multiple channel, single input range
3) Single channel, multiple input
ranges
Note: For conditions 1 and 2 above, specified accuracy is maintained at rated throughput.
Condition 3 applies a calibration coefficient that corresponds to the range value selected in
cbAInScan (). This coefficient remains unchanged throughout the scan. Increased settling
times may occur during gain-switching operations.
Absolute Accuracy
±10.2 LSB
±10.9 LSB
±19.7 LSB
±40.6 LSB
Offset Averaged Noise +
(µV) Quantization (µV)
531 180
274 85
54 12.3
21.2 6.54
±0.5 LSB typ
Calibration Coefficients
Per specified range
Per specified range
Default to value for cbAInScan()
range parameter
6–2
Temp Drift Absolute
1
(%/ ºC) Accuracy at FS
0.001
0.001
0.001
0.001
±1.0 LSB max
ADC Rate (max)
200 kS/s
200 kS/s
200 kS/s
Specifications
(mV)
3.10
1.67
0.30
0.062