Thermo Scientific Surveyor MS Pump, Руководство по оборудованию, Страница: 63 / 100

4
Maintenance
Servicing the LDA
Thermo Scientific Surveyor MS Pump and Surveyor MS Pump Plus Hardware Manual 47
Cleaning the LDA Components
You can clean most LDA components without disassembling the LDA simply by running the
pump for one hour with an appropriate solvent on all four channels (see
“Cleaning the LDA
Components without Disassembling the LDA” on page 38 ).
After you disassemble the LDA, concentrate on cleaning the following components:
• Check valves (see “Cleaning the Check Valves,” below)
• Pistons (see “Cleaning the Pistons” on page 48 )
• Piston chambers and inlet module (see “Cleaning the Piston Chambers and the Inlet
Module” on page 48 )
These are the most likely components to have problems with contamination. The primary
piston seals cannot be cleaned. If the primary piston seals contain particulate matter, replace
them.
Cleaning the Check Valves
To clean the check valves, Thermo Fisher Scientific recommends using a 10 mL syringe with a
very short piece of silicon tubing at the Luer exit. See
Figure 41 . With this syringe, gently
flush the check valves with the following solvents: 5 mL acetone, followed by 5 mL of distilled
water with a few drops of detergent, and then 5 mL methanol. If you cannot achieve free flow
through the check valve, replace it.
Figure 41. Cleaning the check valve
CAUTION Thermo Fisher Scientific does not recommend cleaning check valves with an
ultrasonic bath, because this procedure does not always extract fibrous particles from the
check valves. You might even damage the small ruby balls inside by using an ultrasonic
bath.