HP 53181A Programming Manual page 268

Commands Reference
*OPC
(Operation Complete Command)
*OPC
(Operation Complete Command)
This event command enables the OPC bit (bit 0) in the Standard Event Status
Register to be set upon the transition of the measurement cycle from measuring to
idle. See the section titled "Standard Event Status Register Group," page 3-25, in
Chapter 3 of this guide for a detailed description of the Standard Event Status
Register's Operation Complete bit.
This event command is "disabled" by *CLS, *RST, Device Clear
(page 4-31), power-on, or upon the transition of the measurement cycle from
measuring to idle.
This event command has no query form.
See the section titled "Using the *OPC Command to Assert SRQ,"
page 3-50, in Chapter 3 for an example using this command.
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