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82 Operation and Maintenance Manual
Pump Maintenance
To maintain optimum performance of the Agilent 355 SCD and 255 NCD,
routine replacement of the chemical trap (for ozone destruction), oil
coalescing filter and oil (Edwards oil-sealed pump only) is necessary. Refer to
Table 3 for the expected life span of each replacement part or material.
It is beneficial to keep a maintenance log that tracks when maintenance is
performed and any instrument or operational changes that might impact
performance. Also keep track of detector flow rates (oxidizer and hydrogen),
pressures (burner controller and reaction cell in detector), and background
signal (the difference between ozone “on” and ozone “off”).
Table 3 Operating Life of Components for Edwards RV5 Vacuum Pump
Component/Material Operating life
*
* The operating life is based on the total time logged during operation of the Detector with the Burner and the
ozone generator ON.
Chemical Trap (RV5) ~ 3 month
Oil Coalescing Filter (RV5) ~ 3 months
Pump oil
†
† Pump oil can be purchased from a supplier or directly from Agilent: SAE 10W-30, Multiviscosity Synthetic
Motor Oil such as, MOBIL 1 or AMSOIL.
~ 3 months