If you need a voltage supply with 0.1V accuracy, look no further. Good, safe packaging, so no worries about damage. Amazon Prime-elegible, so I actually got it next-day. I actually feel kinda bad that I didn't go to the city's electronics part store but I ended up with a unit that is better than just about anything I could get there and saved the time and gas of driving.
Anyway, as-advertised, this is a solid 3-rail power supply. The third rail is a fixed 5V/3A, which is a pretty common voltage for a number of devices due to the USB VBUS being 5 volts. It's big, it's massive, and it supplies all the current you need--what can I say? I actually tested the current-limiting capability of this guy on it's first day when I plugged a 12V rail into my project the wrong way. Whoops. Luckily, because of the quick limiting, there was no damage to my board. I'll definitely be running some tests to see if there are any startup current surges and how quickly fault current are quenched, but I'm pretty happy with this baby. I don't know too much about this manufacturer, but the design is a carbon copy of older single-rail power supplies floating around our department and a number of similar supplies available online. Perhaps this is the OEM version?
I chose this supply over a number of others because it has two sets of digital outputs: for projects that require two different voltage rails (common in my field), it's imperative that both be monitored at the same time. A lot of the cheaper Agilent supplies only have one readout and require that you toggle between them. Not cool.
If I had to nitpick, I'd say that the biggest con is that the analog dials are very touchy. It's quite easy to overshoot and can be hard to zero in on a particular supply voltage. However, if you're worth your salt, you ALWAYS ALWAYS disconnect the power supply when changing the voltage so that doesn't matter at all. The only reason this could be bad is if you bump the dials accidentally while plugged in, then God help you. Always locate your power supplies back on the bench where you're unlikely to knock them and disconnect power before doing any bench reconfiguration.
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Do not purchase unless you want a Dr. Meter instead of a Mastech.
I'm a computer engineer and I was hoping to purchase a low budget power supply for work at home. I guess I got what I paid for. There seem to be a lot of good reviews for the real Mastech power supply. However, I received one branded Dr. Meter. As one of the other reviewers mentioned, he compared it with a real Mastech power supply and these are not the same rebranded units but instead a completely different power supply. I wish I had not wasted my time and avoided this item.Amazon, please update the item description and title.I have uploaded a picture of the item I received. I also placed my order through E-Bundle after reading one of the comments which mentioned to avoid Electronix Express.
