Agilent Technologies G6600-90006 manual Pressure Transducer, Vacuum Pump

Figure 6 255 NCD Right Side View

Pressure Transducer

Vacuum in the reaction cell is measured using a pressure transducer. The pressure of the reaction cell can be monitored from the front panel and will typically range from 5 to 10 torr depending on the type of vacuum pump used, condition of the chemical (ozone) trap, ceramic tube position and the condition of the combustion chamber. The range of response is from 0 to 760 torr.

Vacuum Pump

There are two choices of vacuum pumps for the 355 SCD and 255 NCD. A two-stage, oil-sealed rotary vacuum pump is used to produce an operating pressure between 3 and 10 torr in the reaction cell. The oil-free Dry Piston pump produces a vacuum between 5 and 12 torr. All vacuum pumps serve the same purpose:

32 Operation and Maintenance Manual