WATERS CORPORATION 2424, Operator'S Manual, Page: 147 / 196

Chromatography troubleshooting 5-21
Chromatography troubleshooting
This section contains chromatography troubleshooting tables that include
symptoms, possible causes, and suggested corrective actions. These tables can
help you isolate the possible causes of problems related to these factors:
• Abnormal baseline (drift, noise, or cycling) (see the table titled
“Abnormal baseline troubleshooting” on page 5-22 ).
• Erratic or incorrect retention times (see the table titled “Troubleshooting
general chromatography problems” on page 5-27 ).
• Poor peak resolution (see the table titled “Peak resolution
troubleshooting” on page 5-30 ).
• Incorrect qualitative/quantitative results (see the table titled “Incorrect
results troubleshooting” on page 5-31 ).
If your system exhibits symptoms not addressed in one of the tables, refer to
“General troubleshooting” on page 5-13 . If you need further help, contact
Waters Technical Service.
Optics heater rose
above its set
temperature
Heater failure (short
circuit).
Cable or connector
short.
Problem with
personality board.
1. Power-off and then
power-on the detector.
2. If the problem persists, call
Waters Technical Service
(see page 4-2 ).
Optics heater
temperature probe
failure
The heater’s
temperature probe is
not connected or has
a loose connection.
Problem with
personality board.
1. Power-off and then
power-on the detector.
2. If the problem persists, call
Waters Technical Service
(see page 4-2 ).
Warning:
To avoid chemical hazards, always observe safe laboratory
practices when operating your system. Refer to the Material Safety Data
Sheets shipped with solvents for handling information.
Operational error messages (Continued)
Error message Probable cause Corrective action