Riiai SG004A 4-20ma 0-24V Signal Generator, Programmable Current Voltage Generator, Resistance Millivolt Thermocouple Tester, Real-time Curve, 3000mAh USB Rechargeable, for PLC Simulator

Works easy enough and at a great price. Good portability and good battery life. Good quality.

This signal generator has been very helpful for my work. It’s a practical tool for testing and simulating signals, and once you understand the basics, it works very well. It’s not extremely simple to use at first, but it’s also not complicated. After a short learning curve, it becomes easy to operate and delivers reliable results. The device feels solid and performs as expected. Overall, it’s a great tool for professional or technical use. I’m very satisfied with it and would definitely recommend it to others who need a reliable signal generator.

Very compact and powerful. Hard to learn to operate. Have not found a good video.

This little thing is absolutely incredible. If I can find a use for it will be buying the higher end one too that can emulate thermocouples. The manual is helpful if you are REALLY good at reading manuals. Otherwise, there are loads of YouTube videos online. I really realized how good this thing is when I was using a $4k fluke process meter to calibrate it. I could only get the calibration to 0.005, but I’m fine with that. The big thing is this can put out an actual 24vdc (even up to 25vdc!) and the $4k process meter can only do ~20vdc. I had to set up a 24v power supply (measured to 24v exact) to calibrate that input. The 0-20mA is just as good!

Great product to have in your pocket.

Worked exactly as advertised! Not bad for $160, may not be getting the accuracy of that other major name brand ($$$$) but that's just fine!

Returned. It was not worth the effort to figure it out, and I make my living figuring things like this out. I have used many simulators over my career, and when I had given up on this one, I borrowed one that was another brand, which I had never used before, and it worked intuitively. Might just be a poor translation of the buttons labels and manuals from whatever language was used to develop it. I really wanted it to work.

Comes in a well organized package with all the components needed, including an operating manual. Unit firm and sturdy. Beautifully colored to identify varous lead etc. Reasonable size (palm size). Big enough for your hands but small enough to fit in your pocket, making transporting easy. Display big enough for easy read. Good Backlight. Seems to be fairly accurate when tested. Instructions are a bit hard to follow. Currently familiarizing myself with the various parameters and so far it is delivering what it says it can. I will provide more updates as I get more acquainted with this meter