I have been using a serial tc-08 that I borrowed from a friend to sample a 0-50mV signal. I now need to return the converter, and would like some advice as to a replacement.
If possible, I would like a low cost sampler, capable of measuring multiple channels (at least 3) for a range of 0-50mV. I do not need thermocouples etc, I just used a tc-08 as one was handy. I need at least 13-14bit accuracy, but if possible would like to sample faster than the serial tc-08 could manage (around 1 sample every 10ms ideally, but 20-25ms would be satisfactory).
Would the new usb tc-08 be the best converter for the job? I am looking to keep costs down if possible.
Also - does the usb tc-08 have a ground point on it? I will use it with a laptop without an earth lead, and so used to ground the serial tc-08 with a wire from the serial cable hood screws to a mains earth. As a usb connector does not have screws, is there an alternative method available for grounding the device?