Agilent Technologies G6600-90006 manual Reaction Cell Cleaning, Equipment

Reaction Cell Cleaning

Over time, the reaction cell and UV pass filter (SCD) or IR pass filter (NCD) will develop a build-up of material which should be removed for optimum sensitivity. The cleaning schedule depends upon Detector use and the nature of the analyses; however, it is recommended the cell should be cleaned annually. The cleaning procedure requires removal of the photomultiplier tube (PMT) from the Detector, and special precautions are required to prevent damage to the PMT.

Exposure of a photomultiplier tube to bright light can result in damage to the PMT, even when the high voltage is off. To avoid potential damage, minimize light exposure. The black PMT cover included in the Detector accessories package is recommended for this procedure. Carefully read all the instructions below before attempting to remove the PMT. If you have any questions regarding this procedure please contact Agilent.

To clean the cell and pass filter:

1Disconnect the main power cord (if the vacuum pump is operated from an independent power outlet, unplug the power to the pump as well).

WA R N I N G	Any operation requiring access to the inside of the equipment, could result in injury. To
	avoid potentially dangerous shock, disconnect from power supply before opening the
	equipment.

2Remove the right side panel from the Detector and disconnect the high voltage and coaxial signal cables from the rear of the PMT housing (See Figure 3 and Figure 15).

3Turn off all room lights and minimize outside light sources.

4Unscrew the PMT socket connector assembly. Carefully pull the socket assembly and the PMT out toward the rear of the instrument at a slight angle to remove the PMT/socket assembly from the housing.

5Immediately place the black PMT cap over the PMT, being careful to avoid placing fingerprints on the PMT window. Do not remove the PMT from the socket assembly. After the PMT cap is in place, carefully place the PMT and socket assembly on a soft surface inside a drawer or other dark location to minimize exposure of the PMT to light. The room lights may be turned on at this point.

Operation and Maintenance Manual 85