System Throughput; Accuracy - Measurement Computing PCI-DAS64/M1/16 User Manual

PCI-DAS64/M1/16 User's Guide

System throughput

Condition
1. Single channel, single input range.
2. Multiple-channel, single-input range: ±5 V,
±2.5 V, ±1.25 V, 0 to 5 V, 0 to 2.5 V
3. Multiple channel, single input range: ±0.625 V, 0
to 1.25 V
4. Single channel, multiple input ranges.
5. Multiple channels, multiple ranges. All samples in
unipolar or bipolar bode.
6. Multiple channels, multiple ranges. All samples in
unipolar and/or bipolar bode.
7. Multiple-channel, switching unipolar/bipolar
mode, single-input range.
For conditions 1-3, specified accuracy is maintained at rated throughput. Conditions 4-7 apply
Note 1:
calibration coefficients which correspond to the range value selected in
coefficients remain unchanged throughout the scan. Errors of up to 25 counts may be incurred
when switching gains while in bipolar or unipolar mode only (conditions 4 and 5). Errors of up to
500 counts may be incurred when mixing unipolar/bipolar modes (conditions 6 and 7).

Accuracy

A 100 kS/s sampling rate, single-channel operation and a 60-minute warm-up. Accuracies are listed for
operational temperatures within ±2ºC of internal calibration temperature. Calibrator test source high side tied to
channel 0 and low side tied to low-level ground at the user connector
Range
±5.000 V
±2.500 V
±1.250 V
±0.625 V
0 V to +5.000 V
0 V to +2.500 V
0 V to +1.250 V
Range
±5.000 V
±2.500 V
±1.250 V
±0.625 V
0 V to +5.000 V
0 V to +2.500 V
0 V to +1.250 V
Each PCI-DAS64/M1/16 is tested at the factory to assure the board's overall error does not exceed accuracy
limits shown in Table 3
Table 2. System throughput specifications
Table 3. Analog input — absolute accuracy specifications
Table 4. Analog input — typical accuracy specifications
.
Calibration coefficients
Per specified range
Per specified range
Per specified range
Default to value for cbAInScan() range
Default to value for cbAInScan() range
Default to value for cbAInScan() range
Default to value for cbAInScan() range
Absolute accuracy
±6.0 LSB
±8.0 LSB
±8.0 LSB
±10.0 LSB
±8.0 LSB
±11.0 LSB
±13.0 LSB
Typical accuracy
±5.5 LSB
±7.5 LSB
±7.5 LSB
±9.5 LSB
±7.5 LSB
±10.5 LSB
±12.5 LSB
6-5
Specifications
Max ADC
rate
1.0 MS/s
1.0 MS/s
750 kS/s
500 kS/s
500 kS/s
500 kS/s
750 kS/s
. These
cbAInScan()