Deviations from this scheme may occur. To find out if this has been the case, consult the e-log book. Every day at noon, a cron job analyzes the calib runs taken in the last 24 hours and produces postscript files. See this graphic for an idea of what is going on. From these 3 runs, the gain per chip can be calculated.
Bins covered by red or green bars are chips which are known to be faulty.
For a description of the details of the calib algorithm, see this link. If so, inform the commissioners immidiately. A substantially increased noise level is a problem that should be communicated to the commissioners. This is a calib run taken while PEP-II was playing with their magnets. The plots give you a good idea about the variation of the beam related background conditions with time.