I'm looking for some kind of multi-channel multimeter, controllable via USB, with voltage (and ideally current) measurement.
For voltages, they can all have a common reference. For currents, it would need to have a floating connection. But if such a beast is hard to find or doesn't exist, I can do with just voltage measurement - I'll add some current-to-voltage circuitry.
- 4 channels min. for voltage measurement, ~0.1% max error, range from a few tens of µV to about 5V.
- 1 channel min. for current measurement, ~0.5% max error, range from a few tens of nA to about 1mA. As said, this part can be done without if hard to find in a single device - then at least 5 channels of voltage measurement would be required.
Ideally, the USB interface would come with a simple API to program the device on potentially Linux, macOS and Windows.
Some could say that "USB oscllioscopes" might do here (if just for the voltage measurements), but I don't know of any (at least reasonably priced) that would have max. 0.1% error in amplitude, and support low input ranges down to a few tens of µV. Hence why I called that more "multi-channel multimeter".
Some others could say, just buy several multimeters with an USB interface. I would prefer a single device.
Regarding price, $1000 to $1500 would be good.
Note: I know and have used the LabJack T7 in the past:
https://labjack.com/products/labjack-t7it was good for production testing of a simple product, but I'm looking for something a bit more polished and more accurate.