Pressure transducer, Vacuum pump, Figure 6. 255 ncd right side view – Agilent Technologies G6600-90006 User Manual
Page 32
32
Operation and Maintenance Manual
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:
Figure 6
255 NCD Right Side View