[Al Skierkiewicz]

Doug,
The answer depends on how you implement the introduction of this device on your robot. You are more likely to get accurate readings if you monitor the input current to the speed controller. While it does exhibit some of the PWM current spikes, it has less of the spikes, overshoots and noise that appear at the output of a controller or motor wiring. Without getting into the detail of how to use this device, it would be more appropriate to insert it in the common lead of the speed controller input wiring, if possible. The controller input wiring does not change polarity (although it appears that this device may be designed to look at varying polarity signals). That puts the board at a lower potential and if insulation should fail, less likely to cause control issues in other circuitry. The circuit itself will be inspected as a custom circuit under the rules quoted above for each event you attend. It will also be required to be correctly insulated and isolated from the frame while meeting all other robot rules.