Neff Instrument Corporation
NEFF Instruments has been a leading manufacturer of high performance data acquisition equipment.
- 626-357-2281
- sales@neff.com
- 245 W. Garvey Ave.
#513
Monterey Park, CA 91754
United States
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product
Amplifier-per-channel Multiplexed System
System 472
The NEFF System 472 (S472) DAS is a complete moderate-speed DAS for use in computer-based applications. The S472 is designed primarily for computer automated data acquisition in test facilities, laboratories and industrial plants or wherever a moderate-speed DAS is required.
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Differential Amplifier-per-Channel DAS
System 495
NEFF's System 495 uses a proven widerange, guarded differential amplifier -per-channel technique with a dedicated high-speed analog-to-digital converter for each channel. In addition to storing data locally in memory, a subset of each channel's data can selectively be transmitted to the host for monitoring or recording at an aggregate rate of 1MHz.
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Non-Multiplexed High Speed Transient Function Card
Identified by its ADC per channel and on-board memory, it typically operates at per channel sampling rates which in aggregate would overwhelm any communication system. Data is stored on board during a test and transmitted to a host computer following completion.
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Multiplexed- Low-Level Function Card
Low-level multiplexed systems have a single programmable gain, wide-band amplifier following the input multiplexer. To accommodate low-level signal signals such as those from strain gauges or thermocouples and at the same time high level signals from other sources, the throughput rate must be limited to enable the high bandwidth amplifier to settle to the correct value after switching to a new channel. This results in a relatively low aggregate throughput rate when compared to an amplifier-per-channel system. A major benefit of a well designed low-level multiplexed system is the extremely high performance/cost relationship.
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Neff Selector
A step-by-step tutorial designed to help you find the Neff product that fits your data acquisition needs.
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Multiplexed Amplifier-per-Channel Function Card
Multiplexed amplifier-per-channel systems have a dedicated pre-amplifier for every channel and a single Analog to Digital Converter, ADC, for the system. Amplified and filtered analog signals are multiplexed to a post-amplifier and then presented to the ADC to be digitized. Significant benefits of the multiplexed amplifier-per-channel system are: Higher Throughput Rates, Improved Filtering, Higher Per Channel Sampling Rate, Sensor Isolation, Improved Channel-To-Channel Isolation
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DAS
System 470
The NEFF System 470 (S470) DAS is a complete, low cost moderate-speed DAS for use in computer-based applications. The S470 is designed primarily for computer automated data acquisition in test facilities, laboratories and industrial plants or wherever a moderate-speed DAS is required.
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Data Acquisition System
System 620/600
The Series 600 is NEFF's top-of-the-line data acquisition system providing the utmost in performance, accuracy and convenience. Featuring leading-edge technology and innovative design, Series 600 brings extensive automation and complete programmability to the testing laboratory.
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Data Acquisition System
System 730
System 730 eliminates the errors caused by phase shift and skew between channels while maintaining state-of-the-art accuracies of +/- (0.02% FS + 2uV). Quality data acquisition systems include multi-pole filters to attenuate noise and prevent aliasing but skew and phase shift differences between channels can cause errors that eclipse the magnitude of all others.
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Computer Automated Data Acquisition
System 471
The NEFF System 471 (S471) DAS is a complete moderate-speed DAS for use in computer-based applications. The S471 is designed primarily for computer automated data acquisition in test facilities, laboratories and industrial plants or wherever a moderate-speed, high accuracy DAS operating in high common-mode voltage environments is required.
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Non-Multiplexed High Speed Continuous Function Card Overview
This type of system can be designed with benefits of both the multiplexed amplifier-per-channel and transient recorder systems. Benefits of the non-multiplexed amplifer-per-channel system include: High Sampling Rates: With an ADC per channel, the sampling rate is not encumbered with considerations such as multiplexing and post-amplifier settling time.Superior Filtering: With an ADC per channel, digital filtering can be used to augment analog filtering to achieve better anti-aliasing performance with much lower effective sampling rates.Superior Phase Matching: Digital filtering provides much steeper, more predictable rolloff rates and phase characteristics than analog filtering with greater stability with time and temperature changes at lower cost.
