Operating instructions
SECTION 9 - INSTALLATION AND MAINTENANCE LOG 
30 Oct 09  9-1 
  DE-7200VFDCentrifuge 
PURPOSE 
This section should be used by operating and maintenance personnel to record historical 
information gathered during the installation and operation of the Derrick equipment. If properly 
kept, the log will be useful for altering maintenance intervals and intercepting trends that may 
indicate the need for changing operating procedures. Each entry in the log should be dated for 
future reference and tracking. If required, additional pages may be added to the log by copying a 
blank page or simply inserting ruled paper at the rear of the section. 
Installation and Maintenance Notes: 










