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3Ć95
Maintaining the System
4. Disconnect the tubing from the gas regulator and discard the tubing.
5. Connect one end of the new tubing to the fitting on the regulator.
6. Connect the other end of the tubing to the fitting on the reagent manifold.
NOTE: The average main tank pressure is 2200 psi. The average secondary valve
pressure is 3 to 5 psi.
7. Slowly open the gas tank by turning the valve stem counterclockwise with the
wrench.
Turn the valve stem approximately 3/4 turn until the regulator pressure gauge
indicator stops rising.
8. Open the valve stem one more turn.
9. Listen carefully for any gas leaks.
10. Check for leaks using soapy water and watching for bubbles.
11. Verify that the regulator outlet gauge indicates 3 to 5 psi.
12. Press
Continue.
A wash sequence starts. When the wash sequence finishes, a message box
appears prompting you to perform a two-point calibration.
13. Press
No.
14. Check the gas flow rate from the Menu screen:
a. Select
3 Troubleshooting and press Enter.
b. Select 1 Fluidics System and press Enter.
c. Select
4 Valves and press Enter.
d. Select the gas type that you replaced and press Enter.
e. Insert an aspiration adapter into the sample port and immerse the open end
of the adapter into a small container of reagent water.
f. Press
Start Test.
g. Verify that a steady stream of bubbles flows into the water.
h. Press Stop Test.
i. Verify that the bubbles stop flowing into the water.
j. Remove the adapter.
k. Press
Exit Test.
15. Perform a two-point calibration from the Menu screen:
a. Select
1 Calibration and press Enter.
b. Select 4 Gas Two-point and press Enter.
41
Menu Code
3
(from the Main Menu)
1
Menu Code
4
(from the Main Menu)