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RSS FeedsData Acquisition > Voltage > DI-155 The Short Take If all goes as planned we’ll ship the DI-155 data acquisition system during the week of March 12th, with assembly of the first production run scheduled to begin on Monday, March 5th. As of this moment, our online store is accepting advance orders, and shipments will Read More
Category Archives: Data Acquisition
Eliminating Noise When Using a DI-145/149 Starter Kit to Acquire Data
Data Acquisition > Starter Kits A common complaint among DI-145/149 users; “noisy” signals in WinDaq are sometimes attributed to grounding, or lack thereof. Because the DI-145/149 draws its power from the USB port, it shares a ground with the PC. Under these unique conditions, where noise is present, the DI-145/149 should be grounded: You’re connected Read More
Data Acquisition Products Test Hydraulic Actuators
Data Acquisition > Mixed Measurements Note: The DI-740 mentioned below is now obsolete, replaced by the DI-808 or DI-2008. Both the DI-808 and DI-2008 include a 15VDC excitation supply and feature eight differential and isolated analog input channels, with programmable measurement ranges up to ±50V full scale. It’s a critical constraint that demands a critical measurement: Your control signal says Read More
How To Eliminate Noise in Data Logger and Data Acquisition Measurements
Data Acquisition > Products or Data Logger > Products (Note: This is a consolidated version of a six-part series on signal noise reduction in data logger and data acquisition systems.) This happens almost daily: A customer contacts our support group to complain of noise on his measurement. Almost invariably a comparison is made between the Read More
How To Eliminate Noise in Data Logger and Data Acquisition Measurements (Part 6 of 6)
Data Acquisition > Products or Data Logger > Products (Note: A consolidated version of this topic that contains all six part can be found here) Common Mode Voltages and Non-isolated Instruments You’ve arrived at part six of this series because you have noise on one or more acquired analog channels. Using procedures described in Part Read More
How To Eliminate Noise in Data Logging and Data Acquisition Measurements (Part 5 of 6)
Data Acquisition > Products or Data Logger > Products (Note: A consolidated version of this topic that contains all six part can be found here) Proper Shielding Techniques We’ve established that isolation amplifiers do not perform well in the presence of large, high frequency common-mode voltages. Now we’ll focus on eliminating high level, high frequency Read More
How To Eliminate Noise in Data Logging and Data Acquisition Measurements (Part 4 of 6)
Data Acquisition > Products or Data Logger > Products (Note: A consolidated version of this topic that contains all six part can be found here) Common Mode Rejection Ration (CMRR) We’ve touched on common mode voltage and how its magnitude and frequency can degrade the performance of an isolation amplifier. Now we’ll discuss the differential Read More
How To Eliminate Noise in Data Logger and Data Acquisition Measurements (Part 3 of 6)
Data Acquisition > Products or Data Logger > Products (Note: A consolidated version of this topic that contains all six part can be found here) Effects of Common Mode Voltage Frequency We’ve covered evaluating noise magnitude to see if noise elimination is worth the time and effort, and a procedure to test the instrument for Read More
How To Eliminate Noise in Data Logger and Data Acquisition Measurements (Part 2 of 6)
Data Acquisition > Products or Data Logger > Products (Note: A consolidated version of this topic that contains all six part can be found here) Common Mode Voltages and Isolated Instruments In the premier edition of this series I talked about how you should initially approach noise elimination. The first step is to ensure that Read More
How To Eliminate Noise in Data Logger and Data Acquisition Measurements (Part 1 of 6)
Data Acquisition > Products or Data Logger > Products (Note: A consolidated version of this topic that contains all six part can be found here) This happens almost daily: A customer contacts our support group to complain of noise on his measurement. Almost invariably a comparison is made between the output of his PC-based product Read More