GE Osmonics E4H Series Operation And Maintenance Manual page 23

23. A Daily Log Sheet (Section 10.0) which includes general operating con-
ditions (pressures, flows, concentrations, pH, and pretreatment condi-
tions), and routine or special maintenance (flushing or cleaning as need-
ed) must be kept. This Daily Log Sheet will be required by GE Osmonics
if a warranty question arises.
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