Indexing error in `highVoltage.status()`

[Thomas Langford]

There appears to be an indexing error in highVoltage.status() that leads to the script missing the first channel and then throwing an out of limits error for the last channel.

This is related to the two different ways that Wiener indexes their channels, U1-100 vs u0-99. I don't understand why they have both, but this needs some debugging to fix.