For example from run 4056 (Owl, 6/5/07) AVERAGE CURRENT BCM x1 : 55.5032uA BCM x3 : 27.1222uA BCM x10: -17.6586uA
The discrepency between BCM x1 and BCM x3 appears to have begun with run 4050 on swing shift on 6/4/07: AVERAGE CURRENT BCM x1 : 59.3471uA BCM x3 : 42.4617uA BCM x10: -19.5857uA
The BCM x10 value appears to have disagreed withe the other two for quite some time, often returning negative values as shown above. It also returns postive values that are not anywhere near the x1 and x3 values, as shown in this example from run 3769 on May 27th: AVERAGE CURRENT BCM x1 : 40.8233uA BCM x3 : 40.8096uA BCM x10: 11.1801uA
A little snooping around reveals that all three values seem to agree well for low current runs, in the 5-10uA range, with the discrepency increasing with the value of the average current.
A copy of this log entry has been emailed to: saha@jlab.org, camsonne@jlab.org,gomez@jlab.org