Ei Calibration Valve - Agilent Technologies 7250 Troubleshooting And Maintenance Manual

6 Vacuum System

EI Calibration Valve

The EI calibration valve is an electromechanical valve with a vial to hold the
tuning compound. (See
compound in the vial diffuses into the ion source. The valve is controlled by the
MassHunter Workstation software.
The EI calibration valve is held onto the top of the analyzer chamber by two
screws. A small O-ring provides a face seal.
Perfluorotributylamine (PFTBA) is the most commonly used tuning compound
for EI operation. PFTBA is required for automatic tuning of the MS.
Figure 21.
7250 Accurate-Mass Q-TOF Troubleshooting and Maintenance Manual
Figure 21.) When a calibration valve is opened, tuning
EI calibration vial

EI calibration valve

EI calibration valve
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