Agilent Technologies N1911A Programming Manual page 767

*CLS
The *CLS (CLear Status) command clears the status data structures. The
SCPI registers (Questionable Status, Operation Status and all the other
SCPI registers), the Standard Event Status Register, the Status Byte, and
the Error/Event Queue are all cleared.
Syntax
N1911A/1912A P-Series Power Meters Programming Guide
*CLS
IEEE 488.2 Command Reference 17
739