I am not expecting NIST precision and accuracy, just something to keep me accurate enough from creating problems from a bad meter or thermocouple.
It would help us if you gave us a clue as to what property/properties you want to make, and to what accuracy/repeatability/resolution.
Thanks for asking that question and making me think specifically why I would want to purchase this.
Condensed answer:
1- Best shop practice.
2- Traceable standard for when a project becomes commercial.
My background is 24 years as an Avionics Tech in the Coast Guard and flying in those same planes in very bad weather. One of my side duties was running the station calibration program through a contractor. It was mostly all 1980s vintage test equipment and only rarely do I ever recall anything needing adjustment. The Fluke digitals had a cal period of 5 years. I wonder if I am just being paranoid or blowing money to repeat an embedded behavior pattern.
So right now, I expect my Fluke 16 and Rigol DS1054z to act as reliable standards, trusting that they will never drift from the low precision that I need.
Currently I do research to develop products I can build in my machine shop. I do not work on fixing things or fixing things that need to be set back to standards.
So what are my needs?
1- A set standard to check my instruments just as a matter of best working principles for any shop.
2- For products produced in my machine and welding shop that require a specified degree of precision that need to be traced back to a standard.
I have a notebook full of ideas such as optical measuring devices and inductive pickups. If one of those products ever rise above the level of cheap uncertified imports, then I will send "Mr. Signal" to the lab for certification on that parameter.
Since Mr. Signal does not advertise having any lab certification, I would be trusting it like I do my Fluke and Rigol instruments. When the time comes for commercialization and accountability then I would be able to justify the cost of sending it to a lab for certification. I am on a tight budget and am recovering from my Rigol Scope purchase.
I would say single that single digit milivolt range would be precise enough accurate to +- 1 mV. And if anything more than that is needed for a specific project, then that cost becomes part of the project budget and not my Lab budget. I think it is important to understand my project and what is being measured and why and then understanding its need and how it relates to standards. Even with an unlimited budget for an established Cal program, one needs to understand the limits of the program when a project comes up that may surpass the programs boundaries.
I know there are many different ways to set and derive standards. I do not have the space or money to set up another lab area using older equipment for Metrics.
Overall this looks very convenient especially for thermocouple calibration. It will keep my measurements standardized and when real precision accountability is required, I can send it into a lab.I will attach a photo of Data Logging a 6KW Arc Furnace I tried building with 5 rewound Microwave oven transformers. I hope you all get a few laughs from this. I purchased a bunch of Wal-Mart $20 DMMs. They were accurate enough for the job. I used a Sony Video camera to "log the data". The back 2 meters are of each mains phase voltage. The Termocouple meters are monitoring the transformer temperatures, the Fluke was connected to a DC amp clamp doing 64 Amps and the bottom right meter looks like the final Voltage was 31.9 VAC. I did get 6KW bursts out of it but it just ate up carbon rods too fast. I learned a lot from that experiment on a technical level. There are no books telling one how to make a steel melting arc furnace. I was starting almost from scratch. and also learned a lot about expectations and planning money and time vs. progress. Next time I need to do measurements like this I will use a Raspberry Pi.