'Refresh' rewrites the EEPROM with the calibration constants that were read from it into volatile memory on startup. Normally, after a calibration, this is done automatically. There are ways of poking around in memory if you use the serial interface and drop into the monitor, including manually changing the cal constants. A refresh will then write these back to EEPROM. I don't know of any normal use for this command. As for the batteries, one is for the real-time clock, and one is for the measurement memory. The meter will function just fine without either, unless, of course, you want to make timed measurements or store those measurements for a while. On 09/06/2011 08:00 AM, volt-nuts-request@febo.com wrote: > Solartron 7061 software calibration -- Bill Ezell ---------- They said 'Windows or better' so I used Linux.