Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual page 224

7
Troubleshooting
Troubleshooting the Results of the System Leak Test
Figure 158. EASY-nLC 1200 workflow for locating a leak between flow sensor A and the mixing Tee (Part 1)
Install a new solvent line
between the flow sensor A
outlet and the mixing Tee inlet
(step 3d on page 203).
Then, reconnect all of the
solvent lines and rerun the
system leak test
(page 178).
Reconnect all of the solvent
lines and rerun the system
leak test
(page 178).
202 EASY-nLC 1200 Troubleshooting & Maintenance Guide
Locating a Leak Between Flow Sensor A and the Mixing Tee
By following the workflow in
you determined that the leaking connection is between flow sensor A and the mixing Tee. The
system plumbing is set up as shown in
disconnected from the mixing Tee.
Follow the workflow in Figure 158
the leak.
You determined that the leak is in the solvent path between the
outlet of flow sensor A and the mixing Tee inlet.
Disconnect the solvent line from the outlet of flow sensor A.
Then, block the outlet with a Viper fitting
No
No
❖ To locate and remedy a leak between flow sensor A and the mixing Tee
To check if you must replace the solvent line that connects the outlet of flow sensor A to the
mixing Tee, do the following:
a. Set valve A to the Center position.
b. Disconnect the solvent line from the outlet of flow sensor A. Then, block the outlet
of flow sensor A with a Viper fitting.
Figure 159 shows the solvent path blocked at the outlet of flow sensor A.
c. Reset valve A to position 1–6.
Figure 155 on page 197
Figure 157 on
or the procedure on pages 202–
(step 3b on
Readback
for flow sensor A
> 100 nL/min
Yes
Readback
for flow sensor A
> 100 nL/min
or the procedure on pages 198–201,
page 201, with the solvent channel B
203 to locate and remedy
page 202).
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