4 Remote Interface Reference
190 Keysight 34420A User’s Guide
CALibration:STRing <quoted string>
This command records calibration information about your meter. For example, you 
can store such information as the last calibration date or the next calibration due 
date. The calibration message may contain up to 40 characters. [non-volatile 
memory]
CALibration:STRing?
This command queries the calibration message and return a quoted string.
CALibration:VALue <value>
This command specifies the value of the known calibration signal used by the 
calibration procedure.
CALibration:VALue?
This command queries the present calibration value.