Viscometer and Graphing
Now that I’ve got the new board working, I’ve been programming all of the pertinant functions back into the chip. This time I’ve redesigned them to be a little more modular and useful in the long term. As was mentioned in the post a while back, I made a new board and I’ve come to realise that the RS-485 Port is wrong. It has 2 connectors when it requires 3. A-B-Ground. Sigh!
Anyways, I’ve been running tests with the viscometer and everything is working great so far. I’ve got the temperature sensors working and the conditioning of them with OP-amps has worked like a charm. Though I find that the read value from the ADC is pretty jumpy.
Anyways, as reference, here some photos.
The Whole Deal
Temp Conditioner
Also, the linearity test went well. Better than I initially expected.
Motor Linearity
One can notice that there are some burps along the graph but for the most part, it’s fairly linear as far as I’m concerned.
The Amp Hour Radio Show