Waters 1500-Series, Руководство оператора

Страница: 117 / 188

Replacing and cleaning plunger seals and plungers 5-9
8. Press the tool firmly into the pump head, and then remove it.
9. For the 1525µ pump only, refit the plunger bearing on top of the seal.
Make sure the grooves in the bearing are facing outward and are visible
as you look at the pump head.
10. Remoisten the seal and plunger with methanol.
11. Carefully slide the pump head assembly into position over the plunger.
12. Holding the pump head securely against the pump, reinstall the two
pump head mounting screws, alternately tightening the screws using
half turns to evenly align the assembly.
13. Use the data control software to set the flow rate to 0.3 mL/min and
initiate pump flow.
14. Verify that the indicator rod moves freely, and then use the software to
stop the flow, turning off the pump.
15. Use the adjustable wrench to hold the check valve housings in place
while reconnecting the inlet and outlet tubing to the pump head.
16. Tighten the tubing using the 5/16-inch open-end wrench.
17. Prime the pump as described in Chapter 4 . If you notice leaks, verify
pump head and plunger seal installation.
Cleaning and replacing the plungers
The plungers are sapphire rods that require careful handling. Although
cleaning the plungers is not difficult, it is important to follow these
instructions carefully to avoid damaging the plungers. Assemble all materials
and read the procedure thoroughly before you begin.
Caution:
To avoid breaking the plunger, hold the pump head
securely against the pump.
Warning:
To avoid eye injury or lacerations, handle the plunger
with care. Wear safety glasses and use the plunger insertion tool.
Pieces of a broken plunger are very sharp.