Common Commands 
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*ESR? 
This command is used to read the value of standard event registers. And 
values will be cleared to zero after executing this command. The bit definition of 
standard event register and standard event enable register are the same. 
Query Syntax 
*ESR? 
Parameter 
None 
Returned value 
<NR1> 
Relevant Command 
*CLS  *ESE  *ESE?  *OPC 
*IDN? 
This command is used to query related information of AC load. 
Query Syntax 
*IDN? 
Parameter 
None 
Returned value 
<AARD> 
Example 
ITECH,IT8615,KN34243232,01.00 
 
*OPC 
After all other commands executed before *OPC command, the OPC bit in 
standard event register will be set to 1.Sending query standard event register 
command will return value 1 into the output buffer. 
Command syntax 
*OPC