Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual page 214

7
Troubleshooting
Troubleshooting the Results of the System Leak Test
192 EASY-nLC 1200 Troubleshooting & Maintenance Guide
b. With the Analytical Column Equilibration script running, monitor flow sensor A.
Then, depending on the flow rate, do one of the following:
• If the flow is <100 nL/min, you have remedied the leak and completed this
troubleshooting procedure. Return the instrument to normal operation.
• If the flow is >100 nL/min, go to the next step.
4. Check if valve W is leaking as follows:
a. On the Home > Overview page, press the valve W icon and set the valve to the
Center position.
Placing valve W in the Center position blocks the solvent flow into valve W and
eliminates valve W as the possible source of the leak.
b. With the Analytical Column Equilibration script running, monitor flow sensor A.
Depending on the flow rate, do one of the following:
• If the flow is <100 nL/min with valve W removed from the solvent path, valve W
is the source of the system leak. Please contact product support.
• If the flow is >100 nL/min, go to the next step.
5. Check for a leak-tight connection to port 2 of valve W as follows:
i. On the Home > Overview page, change the position of the following valves to
return the system to atmospheric pressure:
- Valve S: Center
- Valve W: 1-6
ii. Disconnect and reconnect the nanoViper fitting of the Waste-In capillary and
the grounding adapter from port 2 of valve W. Take care to avoid overtightening
of the fingertight fitting.
iii. On the Home > Overview page, reset valves A and S as follows:
- Valve S: 1-2
- Valve W: 1-2
iv. With the Analytical Column Equilibration script running, monitor flow sensor
A. Then, depending on the flow rate, do one of the following:
- If the flow is <100 nL/min, you have remedied the leak and completed this
troubleshooting procedure. Return the instrument to normal operation.
If the flow is >100 nL/min, go to the next step.
6. Check the grounding adapter at port 2 of valve W as follows:
i. On the Home > Overview page, change the position of the following valves to
return the system to atmospheric pressure:
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