Agilent Technologies G4782A, Руководство пользователя

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1260 SFC Binary Pump 97
Maintenance
8
Maintenance Procedures
Maintenance Procedures
The procedures described in this section can be done with the binary pump in
place in the system stack.
Table 9 Maintenance procedures
Procedure Typical Frequency Notes
“Exchange the Purge Valve Frit or the Purge
Valve”
on page 100
Yearly, or if the frit
shows indication of
contamination or
blockage
If internally leaking A pressure drop of > 10 bar in low delay
volume configuration and > 20 bar in standard
configuration across the frit (5 mL/min H
2
O
with purge valve open) indicates blockage
Solvent dripping out of waste outlet when valve
is closed
“Remove the Pump Head Assembly” on
page 105
During yearly
maintenance Necessary to get access to pump seals and
pistons
“Maintenance of a Pump Head without Seal
Wash”
on page 107
Yearly, or if pump
performance indicates
seal wear Leaks at lower pump head side, unstable
retention times, pressure ripple unstable — run
Valve Test for verification
Seal life time shorter than normally expected
— check pistons while changing the seals
“Maintenance of a Pump Head with Seal
Wash”
on page 110
Yearly, or if pump
performance indicates
seal wear Only necessary when Seal Wash Option is
installed. Leaks at lower pump head side, loss
of wash solvent
“Exchange the Outlet Valve” on page 120 If internally leaking Pressure ripple unstable, run Valve Test for
verification
“Exchange the Solvent Selection Valve” on
page 122
If internally leaking
If solenoid is defective Cross port flow
Error message “Valve Failed”