Dev Kit Weekly: NI mioDAQ | usagoldmines.com

October 04, 2024

NI, now part of Emerson, has lengthy been generally known as a high-quality provider of automated check tools and measurement methods. For those who’re in an engineering area there’s a excellent likelihood you’ve come throughout their units both at work or throughout educational coaching. MioDAQ, their latest knowledge acquisition line, gives a variety of logging and even output capabilities, and is available in 4 functionality types to satisfy your wants.

NI despatched me a USB-6451 mannequin to check out, which is nominally the second-most succesful machine on this line. This machine’s stats are proven beneath, and documentation on every mioDAQ is found at NI.

What actually jumps to me is the unit’s 20-bit decision, which, in idea, permits it to resolve inputs to over 1 million steps, or 1,048,576 to be actual. It could possibly take 1 million samples per second per channel, which may generate a quite unmanageable quantity of knowledge if you happen to’re not cautious. It’s spectacular on paper, however what are my ideas on the unit after testing?

Preliminary Impressions: Construct High quality, Software program, Compatibility

Out of the field, the USB-6451 mioDAQ exudes a heft and construct high quality befitting a well-equipped lab. It consists of two push-in wiring connector items–that are a pleasure to make use of–together with corresponding screw-in pressure reduction packing containers for semi-permanent wiring setups. There may be additionally a USB-C cable with a thumbscrew that secures it to the mioDAQ, and also you get an NI screwdriver, which is… a screwdriver.

The machine is appropriate with NI LabVIEW, in addition to NI FlexLogger. FlexLogger features a free model, which has its limits however could also be adequate in your wants, which I used this in my experimentation. Right here I had to make use of a secondary Home windows growth PC, as there’s no macOS model (LabVIEW works on Home windows, Mac, and Linux). That specific PC doesn’t have native USB-C ports, so I needed to get an acceptable adapter (or USB A-to-C cable) that’s USB 3.0 appropriate, a little bit of an inconvenience.

Information Logging: Spectacular Capabilities, Simply Scratching the Floor

After a little bit of finagling with adapters, registration, and checking to verify my laptop did certainly characteristic USB 3.xx ports, I bought FlexLogger Lite working. General the software program works properly, however there are two issues that you simply’ll have to know to get began.

First, once you go into the channel setup display through the gear icon, the default measurement setting is differential. This may be modified, however implies that the highest analog enter, e.g. AI0, is referenced to the connection immediately beneath. Secondly, within the upper-right-hand portion of the window, there’s a knowledge price setting, which might (and will) be modified to fit your setup.

For my first experiment, I logged the output of a photo voltaic panel arrange at my desk. Since I alter my desk lighting round ceaselessly for varied puprposes, the graph confirmed some attention-grabbing outcomes. I set it to take measurements each 10 seconds, which is greater than sufficient for the sort of slowly altering state of affairs.

After that, I not directly measured the present consumption of an Arduino Uno working an onboard LED blink sketch by means of a 33 ohm shunt resistor. The graph exhibits a definite distinction between the 2 states. The ensuing consumption values (I = V/R, at 5V with a .89 and .78V drop) are 27mA and 24mA, not an enormous distinction.

Recorded stats could be output in a CSV format for evaluation or seen on FlexLogger immediately if you happen to so choose. Whereas I carried out each my exams in items of voltage, the channel Bodily Measurement setting has a wide range of enter choices, together with temperature, strain, power, and extra.

Backside Line: is mioDAQ the Gadget for You?

For those who want a strong, full-featured DAQ machine to be used in knowledgeable setting, the mioDAQ is worthy of consideration. NI’s repute for measurement excellence precedes them, and my preliminary impressions and restricted testing would recommend that this machine isn’t any exception. The USB-6451 examined retails for $2499, with the (even) greater spec’d USB-6453 coming in at $3499. The USB-6421 and USB-6423 have lowered 16-bit, 250 kS/s specs, however at $1099 and $1999 respectively, they could signify an economical choice.

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