The DAQ720 is a complete 32-channel bridge signal conditioning system with a 16-bit resolution ADC and 10 BaseT Ethernet connectivity to a PC or laptop for setup, data display and processing. It is packaged in a compact 3U (5.25") high, 449mm (17.68") wide, 326 mm (12.83") deep chassis that can be configured for table top or rack mount applications. Local data storage is available via an optional CompactFlashT module.* Auto configuration on power-up provides stand-alone capability and along with the simple user interface makes data collection and storage a two mouse click process.

The signal conditioning accommodates transducers that represent 1, 2 or 4 active arms of a bridge circuit. Strain gages, RTDs and other bridge-type sensors can be accommodated. Each DAQ720 channel includes programmable gain from 1 to 1000 with prefilter gains of 1, 10, 100 and 1000 as well as post filter gains of 1, 2, 5 and 10. Each channel also includes a programmable Butterworth filter with cutoff frequencies of 10, 50 and 500 Hz. Each filter can also be bypassed. End-to-end channel calibration is accomplished by software configuring the input multiplexer on each channel to receive a reference voltage provided by an internal calibrator.

Options are available with high-precision 120 ?, 350 ? and 1000 ? resistors for on-board bridge completion. Shunt calibration is activated under program control. Shunt calibration resistors are also optionally available to accommodate various bridge requirements. Bridge excitation is programmable, with 0, 2.5, 5 and 10 V selection.

For applications that exhibit high electrical noise, options are available that include a tri? lar-wound input transformer. This transformer provides excellent high-frequency common-mode rejection. Connections are available to provide a full 10-wire bridge hookup. Each of the bridge channels is connected via a 15-contact "D" connector.

*The CompactFlash™ module option will reduce the signal conditioning channel count to 30 channels.