Thermo Scientific Dionex, Руководство оператора

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9 • Troubleshooting
Doc. 065250-06 03/2020
119
If it is not possible to replace the tubing, damaged SS liquid lines can be
patched. To do so, cut out the bad section and insert a new piece of tubing
with a coupler (P/N 040240) on each end.
NOTE Routinely patching tubing increases the possibility of
leaks.
•
Blocked or improperly installed waste line
Make sure waste lines are not crimped or otherwise blocked, and are not
elevated at any point after they exit the AE or other enclosure. Waste lines
should be clear and open to the atmosphere.
•
Dilution vessel leaking
1. Make sure all fittings are tightened securely.
2. If the dilution vessel contains excess liquid (partially diluted sample or
standard from a previous analysis), purge the vessel as follows:
a. Verify that the DV (SV6) valve is off.
b. Turn on the GAS (SV8) valve for 1 to 3 minutes.
3. The pressure applied to the dilution vessel may be insufficient to empty it.
Make sure the high-purity gas supply is regulated to 170 to 240 kPa (25 to
35 psi).
4. If the larger (unheated) dilution vessel is installed, make sure that no more
than 250 mL of liquid is pumped into the vessel. If the smaller (heated)
dilution vessel is installed, make sure no more than 50 mL is pumped into
the vessel.
5. In the normally open (default) position, the DV (SV6) valve purges the
dilution vessel to waste. Check the Chromeleon 7 instrument method used
for system control to verify that the valve remains open while the dilution
pump is running.
•
Leaking pump check valve fittings
1. Tighten the inlet and outlet check valve fittings just until the leak stops.
2. If a check valve fitting is securely tightened but allows leaks despite this,
the valve is defective. Replace the check valve (see Section 10.3 ).