Thank you Bob256,
I first thought of some way to actually measure power output and then realized it would take a lot more instrumentation than I could afford. I couldn’t justify either building or buying a torque cell to measure power output so I had to come up with another method. One way would be to measure the power generated by the absorbing motor and then back calculate the input power from the drive motor. The only problem is that you would have to know the generator efficiency of the absorbing motor, so you are back to having to use some means of directly measuring torque. As for a schematic of the tachometer I use, it is actually a handheld unit I bought from
www.web-tronics.com (Thanks again TypeZero). It works very well and can be used to measure many things. It is very useful and only $50. Anyway, Thank you again.