Get your four vibrations
-- Test & Measurement World, 7/10/2008 11:50:00 AM
United Electronic Industries has expanded its line of Ethernet-based data-acquisition systems with the introduction of the DNA-AI-211, an analog-input module that provides four isolated vibration sensor channels. Each channel has its own 24-bit analog-to-digital converter (ADC), so the board can sample all channels simultaneously. Each channel accepts signals from standard two-wire vibration sensors, and each can provide up to 8 mA of bias current for a sensor. An ADC, separate from the four 24-bit ADCs, monitors bias current for short or open circuits.
The 24-bit ADCs sample at rates up to 125 ksamples/s with a 109-dB signal-to-noise ratio. Analog and digital anti-aliasing filters have a 3-dB cutoff frequency of 49% of the sample rate, keeping the sampled signal under the Nyquist rate. The filters attenuate out-of-band frequencies by 100 dB.
Price: $2000. United Electronic Industries, www.ueidaq.com.
