Source pressure test failure due to leak - WKB3892

SYMPTOMS

• Source pressure fails to reach 100 mbar
• Dashboard trace shows correct gas supply but indicates small leak
• Error "Source pressure test leak warning" in console
• Error "Source pressure test failed" in console
• Vacuum levels are within expected ranges
• Waste bottle and exhaust connections are secure
• Hinge fixing points are secure
• Catch dowel of source is undamaged

ENVIRONMENT

• Xevo TQ MS
• Xevo G2-XS

CAUSE

Damaged O-ring causes a minor front end vacuum leak, which prevents the source from pressurizing to 100 mbar.

FIX or WORKAROUND

Replace the BS039 O-ring (5711130) between the ion block support and the pumping block subassembly.

ADDITIONAL INFORMATION

Also see source pressure test advice note.