Incorrect leak rate profile during dynamic leak test - WKB12203

SYMPTOMS

• Incorrect leak rate profile during dynamic leak test
• Shows an increase of leak rate on accumulator when leak rate on primary is monitored

ENVIRONMENT

• ACQUITY UPLC BSM
• ACQUITY I-Class BSM
• ACQUITY H-Class BSM

CAUSE

Faulty check valve on accumulator pump

FIX or WORKAROUND

Replace the check valve for the accumulator pump.

Accumulator check valve part number for classic ACQUITY: 700002968

Accumulator check valve part number for I-Class ACQUITY: 700003755

Accumulator check valve part number for H-Class ACQUITY: 700005164

ADDITIONAL INFORMATION