This week was composed of finishing up the composition of the electrical testing rig, capturing some electrical charactersitics of our prototype (similar data was found in comparision to Arthrex Documentation).

As expected, (one example, measurements were done for all modes under ablate 5), the measured Vrms closley match the AR9800s Limit/Test level documention! In the image shown above, MATH mode was used to subtract the two probe voltages across the resistor (as this is not a floating circuit, some extra percautions were taken as to not short anything or create any physical loops). We captured ~78Vrms, while Arthrex documentation, with a little math, expected 79.7Vrms, very close (1% difference)!

From this data we’ll record more charactersitics of the signal across 2 varying loads, with tissue loads following, replacing formulas for Irms with current probes (as tissue loads are varying loads, we can’t rely on constant equations).

Non-inductive load resistors were screwed to a wood base, with the same length of twisted wires connecting to a central perfboard with screw terminals, and solder ports for the probe to connect to.

We also order a few components essential to our prototyping process like heat shrink for the shaft, a new UV epoxy with UV light for faster prototyping, as well as copper foil to create a link between the pcb and electrode connections (stainless steel doesn’t solder well!).

Closing the week with a QRB (Qualification Review Board) presentation, we recieved vital feedback and comments on our progress for the project. The board belived our project was on track and overall presentation was great with some comments on formatting and font size.