Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual page 213

Thermo Scientific
The instrument places the valves in the following positions, and pump A begins
pumping solvent through flow sensor A.
• Valve A: 1–6
• Valve B: Center
Figure 152 shows the solvent system schematic on the Home > Overview page. Use
this page to monitor the readback for flow sensor A and to access the valve controls.
For information about changing the valve positions, see
on page 165.
Figure 152. Home > Overview page showing the readback for flow sensor A
b. 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, you have remedied the leak and completed this
troubleshooting procedure. Return the instrument to normal operation.
• If the flow rate is >100 nL/min, go to the next step.
3. Make sure that the connection between the Viper blind plug and port 1 of valve W is leak
tight as follows:
a. Finger-tighten the Viper blind plug connected to port 1 of valve W.
Troubleshooting the Results of the System Leak Test
• Valve S: 1–2
• Valve W: 1–2
Readback
for flow sensor A with
a flow < 100 nL/min
EASY-nLC 1200 Troubleshooting & Maintenance Guide
7
Troubleshooting
"Using the Valve Controls"
Press this icon to
open the controls
for valve W.
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