Waters ACQUITY UPLC M-Class System Manual page 46

4 Maintaining the system
Solvent manager maintenance procedures:
Maintenance
procedure
Replace the pump
interconnect tubing
Replace the i
cartridge
Autozero the flow
transducers
46 March 10, 2014, 715003588 Rev. A
Frequency
As part of the annual scheduled routine
maintenance and thereafter, as needed. The typical
failure modes are as follows:
• You see a visible leak
• The system exhibits a high pressure shutdown
and the pressure decays when the connection
after the tubing is broken.
As part of the annual scheduled routine
2
Valve
maintenance and thereafter, as needed. The typical
failure modes are as follows:
• Late eluting peaks are exhibited after a dynamic
leak test was performed where the leak rate is
above the acceptable limit.
• The μBSM exhibits a low or erratic flow rate or
pressure pulsations.
• An intake valve error message occurs.
As needed. If you observe a measured flow value
exceeding +/- 10nL/min at a stop-flow condition,
auto zero the flow transducers. In the instrument
console software, the measured flow rates appear in
the plot-data channels Measured Flow Rate A and
Measured Flow Rate B of the μBSM.
The ASM has only one flow transducer, on
Note:
the B pump.
See also:
explaining how to perform the auto zero procedure.
The online Help for instructions