Specifications

General Maintenance 4
5975 Series MSD Troubleshooting and Maintenance Manual 113
To Reinstall the EI Calibration and Vent Valve Assembly
Materials needed
• Calibration valve (G3170-60204)
• O-ring for calibration valve (0905-1217)
• PFTBA (05971-60571) or other tuning compound
• Screwdriver, Torx T-15 (8710-1622)
Procedure
1 Remove the old valve assembly. See page 112 and Figure 13.
2 Be sure the valve O-ring is in place. If it is worn or damaged, replace it.
3 Install the calibration and vent valve assembly and tighten the screws that
hold it in place.
4 Reconnect the calibration valve cable to the connector next to the fan.
5 Remove the vial from the new calibration valve. See page 109. The valve is
supplied with a vial already installed.
6 Fill and reinstall the calibration vial. See page 109.
7 Pump down the MSD.
8 Select Purge Calibrant Valve from the Vacuum menu in the Tune and Vacuum
Control view.

CAUTION
Failure to purge the calibration valve will damage the filaments and detector.