Keysight Technologies P Series Programming Manual page 238

4 CALibration Subsystem
Query
CALibration[1]|2:ZERO:AUTO?
The query always returns a value of 0.
Error Messages
– If this command is set to ON and an 8480 Series or E-Series power sensor is
– If zeroing was not carried out successfully the error –231, "Data Questionable;
– If there is no sensor connected, the error –241, "Hardware Missing" occurs.
238
connected the error –241, "Hardware missing" occurs.
ZERO ERROR" occurs. The error message will specify which channel failed
zeroing.
Keysight N8262A Programming Guide