Thanks, Jeff.
After your post, I went back and did find this in the manual, but the voltmeter feature is not called out. It is somewhat buried in there with the Pilot commands, and that is the only reference I could find.
Interesting; I look forward to trying this and comparing the reading to the "Mellow voltmeter" I recently installed, since they'll be on 2 different circuits.
Regards,
-Geo