Can I use batch and lot numbers on a µR series with the header printout option (/BT1)? Can I reset the lot number?

User's Manual: See “Setting the Lot Number” in section 6.14, “Setting Up Start Printout and End Printout (/BT1 Option)” to set it to zero (or some other value).
μR10000 Recorder User's Manual
μR20000 Recorder User's Manual