Series 9300 are fully programmable, modular signal conditioning amplifiers for use with transducers and other low-level signal sources. An on-board microprocessor automates operation, reducing setup time and assuring high-quality measurement data. Programming and control are by IEEE-488 interface using a high-level programming language or Windows software. The optional control panel enables setting and display of operating parameters locally with display of excitation voltage and current and amplifier output.
The 9355 is a transducer amplifier with a guarded 2 to 10 wire input. It has bridge completion, programmable constant voltage and constant current excitation with remote sensing and excitation interrupt, automatic balance, shunt calibration, programmable gain instrumentation amplifier and programmable filter. DAC controlled shunt calibration with 4096 steps is standard and 4-step, bipolar double resistive shunt is optional.
Within the 9355, bridge completion and calibration components mount on a plug-in, front panel installed completion card that has a holder for channel identification data. Switches on the completion card set transducer specific operating parameters and identification. Completion cards are available for special requirements such as dynamic strain, 28 Volt excitation, voltage-mode charge, input attenuation and many other standard and customer-specific applications.
Gain is programmable from 1 to 10,000 with 0.05% resolution and 32 preset steps. Ten gain steps are factory calibrated providing ±0.1% accuracy. The remaining gain steps may be user calibrated or employed as variable gains for engineering units calibration. The amplifier operates from grounded or floating sources providing 120-dB rejection for common mode voltages to ±300 Volts.
Buffered Data and Tape outputs supply ±10 Volts full scale. Each output may be selected for wideband or filtered response. The standard filter is a four-pole, Bessel low-pass with eight programmable bandwidths and wideband. Output and excitation can be read over the computer interface and on the optional control panel. The control panel sets and displays excitation, gain and filter; controls balance, zero, calibration and input modes and displays the output and excitation voltage or current level.
Channels may be programmed individually or as a group using IEEE-488 or RS232. Adapters are available for Ethernet. Programmed operating parameters are kept in non-volatile memory and are automatically restored when the system is powered up or reset. PACWin93 control and display software is optionally available for operation under Windows 2000/XP. User programming is supported by a high-level instruction set and National Instruments LabView driver. PI660 software includes a feature for programming the 9355s when used as the front end for Pacific’s Series 6000 data acquisition system.
Ten channels, each with integral isolated power supply, mount in a 7-inch high rack enclosure. Multiple enclosures can accommodate up to 160 channels on each bus address. Interface adapters are available for Ethernet and USB 2.0.