"Out of range" error on the 2465, 3465 ECD - WKB12734

SYMPTOMS

• "Out of range" error on the front screen when trying to clean in pulse mode
• Reboot doesn't resolve

ENVIRONMENT

• 2465 ECD (electrochemical detector)
• 3465 ECD (electrochemical detector)

CAUSE

Dirty working electrode

FIX or WORKAROUND

Clean the working electrode according to the instructions in the appicable user manual

•  Waters 2465 Electrochemical Detector manual.
•  Waters 3465 Electrochemical Detector Overview and Maintenance Guide

ADDITIONAL INFORMATION

Mobile phase must be clean because it is in direct contact with the working electrode in EC detection. High-purity chemicals, including water, are prerequisites.