Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual page 227

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sensor B to the mixing Tee inlet, do the following:
a. Set valve A to the Center position.
b. Set up the system plumbing as follows:
i. Remove the Viper blind plug from the mixing Tee's inlet for the solvent B
channel.
ii. Reconnect the solvent line to the solvent B channel inlet of the mixing Tee.
iii. Redo the nanoViper connection to the mixing Tee's inlet for the solvent B
channel.
The system plumbing now matches that for a system leak test.
c. Reset valve A to position 1–6.
d. 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, you have completed this troubleshooting
procedure. Return the instrument to normal operation.
• If the flow rate is >100 nL/min, go to the next step.
2. To determine whether the solvent line is the leak source, do the following:
a. Set valve A to the Center position.
b. Disconnect the solvent line from the outlet of flow sensor B. Then, plug the free end
of the solvent line with a leak test union and a Viper fitting (see
Figure 161. Solvent line disconnected from the outlet of flow sensor B
Inlets of the flow sensors
Troubleshooting the Results of the System Leak Test
Solvent line disconnected
from the outlet of flow sensor B
and plugged with a union and a
Viper blind plug
EASY-nLC 1200 Troubleshooting & Maintenance Guide
7
Troubleshooting
Figure 161).
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