Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual page 219

Locating a Leak Between the Flow Sensors and Valve S
Figure 155. EASY-nLC 1200 workflow for locating leaks between the flow sensors and valve S
Check solvent lines between flow sensor A and valve S, including the mixing Tee and flow sensor B, for leaks.
Install a new solvent line
between port 4 of valve S and
the mixing Tee outlet
(step 2d on page
Then, reconnect the plumbing
and rerun the system leak test
(page 178).
Disconnect the Viper fitting from the mixing Tee outlet, and reconnect the solvent line to the mixing Tee outlet. Disconnect
the solvent line from the mixing Tee inlet for the solvent B channel, and block the inlet with a Viper fitting
page 200).
Go to "Locating a Leak Between Flow Sensor B
and the Mixing Tee"
Thermo Scientific
To determine whether the leak is coming from the connection to port 4 of valve S, the
connection to the mixing Tee outlet, or the connections between the flow sensor outlets and
the mixing Tee inlets, follow the workflow in
System leak test fails and returns the following message:
Redo the nanoViper fitting connection to port 4 of valve S
Start the Analytical Column Equilibration script
No
Done
Disconnect the nanoViper fitting from the mixing Tee outlet.
Then, block the mixing Tee outlet with a Viper blind plug
No
200).
No
on page 204.
Figure 155
(step 1a
(step 1b
Readback
for flow sensor A
> 100 nL/min
Yes
(step 2
Readback
for flow sensor A
> 100 nL/min
Yes
Readback
for flow sensor A
> 100 nL/min
Go to "Locating a Leak Between Flow Sensor B
and the Mixing Tee"
EASY-nLC 1200 Troubleshooting & Maintenance Guide
Troubleshooting the Results of the System Leak Test
or the procedure on pages 198–201.
on page 198).
on page 198).
on page 198).
(step 3
Yes
on page 204.
7
Troubleshooting
on
197