High vacuum error for ion guide region - WKB1543

SYMPTOMS

• System status error: High vacuum error for Ion guide region
• Error came after source maintenance
• Ion guide Pirani readback = 3.5 e-3 (normally = 5 e-5)
• With isolation valve closed, pressure drops to under 9e-5
• With isolation valve open, pressure rises back to 4 e-3

ENVIRONMENT

• Xevo TQ-S

CAUSE

Damaged sample cone O-ring

FIX or WORKAROUND

1. Replace the sample cone O-ring (700004321).

ADDITIONAL INFORMATION