Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual page 222

7
Troubleshooting
Troubleshooting the Results of the System Leak Test
200 EASY-nLC 1200 Troubleshooting & Maintenance Guide
d. On the Home > Overview page, check the readback for flow sensor A. Then,
depending on the flow rate, do one of the following:
• If the flow rate is <100 nL/min, do the following:
i. Stop the Analytical Column Equilibration script and return the system to
atmospheric pressure.
ii. Disconnect the damaged solvent line from port 4 of valve S.
iii. Install a new solvent line to connect the mixing Tee outlet to port 4 of
valve S.
For ordering information, see
iv. Rerun the system leak test (see
page 178).
• If the flow rate is >100 nL/min, go to the next step.
3. To eliminate the solvent B channel as the leak source, do the following:
a. Set valve A to the Center position to return the system to atmospheric pressure while
maintaining pressure on the front end of the system.
b. Disconnect the Viper blind plug from the mixing Tee outlet, and reconnect the
solvent line to the mixing Tee outlet.
c. Disconnect the solvent line from the mixing Tee inlet for the solvent B channel, and
block the inlet with a Viper blind plug.
Figure 157 shows the solvent line disconnected from the mixing Tee and a Viper
blind plug in the inlet port of the mixing Tee for the solvent B channel.
d. Reset valve A to position 1–6.
Table 32 on page 268.
"Running a System Leak Test" on
Thermo Scientific