3.2 Recommended maintenance schedule
Perform the following routine maintenance on the module to ensure reliable operation and
accurate results. When using the system throughout the day (and on nights and weekends), or
when using aggressive solvents such as buffers, perform these maintenance tasks more
frequently.
3.2.1 Recommended CH-A routine maintenance schedule
Maintenance procedure
Frequency
Replace the column
During scheduled routine maintenance or as
needed
Replace the ferrule on the column fitting
During scheduled routine maintenance or as
needed
Replace the APH assembly
As necessary
Replace the column-stabilizer assembly
As necessary
Replace the leak sensor
As necessary
Replace the column in-line filter unit frit
During scheduled routine maintenance or as
needed
Clean the instrument with a soft, lint-free cloth,
or paper dampened with water
As necessary
3.3 Spare parts
To ensure that your system operates as designed, use only Waters Quality Parts. Visit
for information about Waters Quality Parts, including how to order them.
3.4 Safety and handling
Observe these warning and caution advisories when you perform maintenance operations on
your system.
Warning:
Observe Good Laboratory Practice (GLP) at all times, particularly when
working with hazardous materials. Consult the Safety Data Sheets regarding the
solvents you use. Additionally, consult the safety representative for your organization
regarding its protocols for handling such materials.
December 4, 2019, 715005052 Version 02 (previously released as Rev.B)
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