https://hallaweb.jlab.org/wiki/index.php/Compton_monitoring
Step 1: Take a run (say an hour or two) Step 2: At the end of the run, check asymmetry graph in the Compton logbook to make sure it is reasonable
More details in the Wiki.
A copy of this log entry has been emailed to: nanda@jlab.org, jpchen@jlab.org