No beam on TQD - WKB89463

SYMPTOMS

• No beam present in positive or negative ion

ENVIRONMENT

• TQ Detector
• Xevo TQ MS

CAUSE

The engineer settings have reverted to default values, resulting in the beam being over-resolved and thus undetectable.

FIX or WORKAROUND

1. Load the engineer settings by either uploading the registry settings or reentering the engineer values manually.
2. The experimental record from a good data file contains the required engineer setting values.

ADDITIONAL INFORMATION