Measurement-computing USB-7202 Bedienungsanleitung PDF herunterladen (Seite 19)

Chapter 4

Specifications

All specifications are subject to change without notice.

Typical for 25 °C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Analog input

Table 1. Analog input specifications

Parameter Conditions Specification

A/D converter type 16-bit successive approximation type

Number of channels 8 single-ended

Input configuration Individual A/D per channel

Sampling method Simultaneous

Absolute maximum input voltage CHx IN to GND ±15 V max

Input impedance 100 MΩ min

Input ranges Software-selectable ±10 V, ±5 V, ±2 V, ±1 V

Sampling rate Scan to system memory 0.6 S/s to 50 kS/s, software-selectable

BURSTIO scan to 32 k sample FIFO 20 S/s to 50 kS/s, software-selectable

Throughput Software paced 500 S/s all channels, system-dependent

Scan to system memory (Note 1) (100 kS/s) / (# of channels); maximum of

50 kS/s for any channel

BURSTIO scan to 32 k Sample FIFO (200 kS/s) / (# of channels), maximum of

50 kS/s for any channel

Resolution 16 bits

No missing codes 15 bits

Crosstalk Signal DC–25 kHz –80 dB

Trigger source Software-selectable External digital: TRIG_IN

Calibration Cal factors stored in firmware. Cal factors

must be applied to data via application

software.

Note 1: Maximum throughput scanning to system memory is machine dependent.

Table 2. Calibrated absolute accuracy

Range Accuracy (mV)

±10 V 5.66

±5 V 2.98

±2 V 1.31

±1 V 0.68

Table 3. Accuracy components - All values are (±)

Range % of Reading Gain error at FS (mV) Offset (mV)

±10 V 0.04 4.00 1.66

±5 V 0.04 2.00 0.98

±2 V 0.04 0.80 0.51

±1 V 0.04 0.40 0.28

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Measurement-computing USB-7202 Bedienungsanleitung Seite 19