Running A System Leak Test - Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual

7
Troubleshooting

Running a System Leak Test

Running a System Leak Test
178 EASY-nLC 1200 Troubleshooting & Maintenance Guide
4. To determine whether the leak is between the pressure sensor and the valve or the pressure
sensor and the pump, do the following:
a. Remove the fitting from the top of the relevant pressure sensor, and replace it with a
viper blind plug 6040.2303. Tighten the fitting as described in
fitting" on page
b. Repeat the Test – Leaks script.
c. Depending on the result of the Test – Leaks script, do one of the following:
• If the Test – Leaks script passes, go to
the leak is between the pressure sensor and the valve.
• If the Test – Leaks script fails, go to
sensor and the pump.
5. To locate a leak between the pressure sensor and the valve, do the following:
a. Remove the blanking nut and replace the original fitting.
b. Manually check the fittings between the pressure sensor and the valve, and confirm
that they are leak tight.
If the fittings are leak tight, the valve might be the source of the leak.
c. If the valve is leaking, please contact product support.
d. Run the Test – Leaks script for the relevant pump and confirm that you have fixed
the leak.
6. To locate a leak between the pressure sensor and the pump, do the following:
a. Remove the viper blind plug and replace the original fitting.
b. Confirm that the fittings between pump and the pressure sensor are leak tight.
c. Repeat the Test – Leaks script.
d. If the script fails again, the cause might be a worn piston seal.
e. If you suspect that the leak is caused by a worn piston seal, go to
Syringe Pumps"
To identify and locate a leak downstream from valves A and B, run the system leak test (Test –
Leaks script with System selected), and then take appropriate action as described in
on page 183.
Table 25 lists the materials required to identify and locate leaks. Because this troubleshooting
procedure requires you to handle the solvent lines, you must wear gloves and safety glasses.
84.
step
on page 70.
"To use a nanoViper
step 5, as the piston seal is leak tight and
6, as the leak is between the pressure
"Maintaining the
Table 26
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