This Information Applies To: Agilent HES source, Agilent 5977 Series GC/MSD
During normal operation of the GC/MSD, the ion source will need to be disassembled to proceed with abrasive ion source cleaning and / or replacement of consumable parts (dual filament assembly and ceramic insulators). The ion source will then need to be assembled prior to re-installing. Proper abrasive cleaning, assembly, and installation are essential to robust and reliable operation.
Figure 1. Pars of the HES Source
|Item Number||Item Description||Part Number|
|1||Source finger grip||G7002-20008|
|3||Extractor lens (5)*, with 3 mm opening||G7004-20061|
|4||Ceramic insulator for extractor||G7002-20064|
|5||Entrance lens assembly, Extended, HES (1)*||G7004-20065|
|6||Ion focus lens (2)*||G7004-20068|
|8||M2 x 0.4 screw x 12 mm long gold plated screw||G7002-20083|
|10||Post extractor lens 2 (3)*||G7004-20090|
|11||Post extractor lens 1 (4)*||G7004-20004|
|12||M2 x 6 mm gold plated screw||G7002-20109|
|13||Locking ring lens insulator||G7002-20126|
|14||High efficiency dual filament||G7002-60001|
|15||Ring heater/sensor assembly||G7002-60058|
|16||Source mount 1.5 mm||G7002-60053|
* The number in parenthesis is the number engraved on the lens
To Disassemble the HES source:
Caution: Use care when removing the filament from the filament block. Putting excessive stress on the filament can break or crack it. If this happens, do not attempt to operate with a defective filament, it must be replaced.
Caution: Use care when removing and handling the ring heater/sensor assembly. Putting excessive stress or pressure on this assembly can break or crack it. If this happens, do not attempt to operate with a damaged ring heater/sensor assembly, it must be replaced.
Caution: Use care when removing the lenses from the lens insulator casing. Putting excessive stress on this casing can break or crack it. If this happens, do not attempt to operate with a defective lens insulator, it must be replaced.
To Assemble the HES Source:
Caution: Use care when inserting the lenses into the lens insulator casing. Putting excessive stress on this casing can break or crack it. If this happens, do not attempt to operate with a defective lens insulator, it must be replaced.
Figure 4. Assembly of lens into the lens insulator. The lens chamber's open end always faces the entrance lens 1. Rotate each lens until you feel the ball seat into the circular recess. It's easier to insert lens 5 on an angle because the lens stack at this point makes the insulator less flexible.
Caution: Do not overtighten the screws in the source body. Damage may occur to the repeller.
Learn how to effectively operate your 5977 or 7000 or 7010:
Agilent 5977 GC/MSD with MassHunter Workstation
Agilent 7000 or 7010 Triple Quadrupole GC/MS with MassHunter Workstation e-learning paths available from Agilent education