2
Troubleshooting
Investigating Vacuum Issues
134
ISQ 7000 Hardware Manual
Thermo Scientific
An air leak has been detected.
Foreline pump will not power-on.
Foreline pump powers on, but the system will not pump down.
Turbomolecular pump will not power-on.
Possible Remedies
Spray gas around the vacuum manifold and look for characteristic ions in full-scan EI mode. Correct any problems. Some of the most
common ways to address leaks are:
•
Tighten the transfer line nut or union.
•
Tighten the vent valve knob.
•
Make sure there is clean helium flow from the GC.
•
Evacuate the region between the vacuum interlock knob and sealing ball by pressing the
Evacuate
button.
•
Check the transfer line or inlet ferrules. Replace them if they are broken. See
for details.
•
Clean dust or debris from the top cover O-ring.
If you do not find a leak, turn on the ISQ 7000 system in full-scan mode, open Manual Tune, select the real-time viewer and scan the mass
range that covers the characteristic ions for the compressed gas you are using. Most compressed gases have ions between m/z 35 and
100. While you are reviewing the ions, spray the gas around the components in the bulleted list above. When you see the characteristic
ions in the real-time viewer, the component you just sprayed has a leak and needs to be addressed.
Possible Remedies
If the Vacuum light on the front of the instrument is flashing amber quickly, the system took too long to reach vacuum and shut off. You
must cycle the power on the ISQ 7000 instrument to enable the foreline pump to power-on.
Make sure the foreline pump switch is in the On position.
Make sure the cable from the foreline pump to the ISQ 7000 instrument is properly attached to the MECH PUMP connector on the back of
the ISQ instrument.
Configure the foreline pump for the proper line voltage.
Make sure the ISQ system is properly connected to an electrical outlet and is powered on.
Possible Remedies
Tighten the vent valve knob.
Check the vacuum connection of the last component you performed maintenance on and make sure it is sealed properly.
Tighten the clamps and connectors on the foreline hose. Replace the foreline hose if it is damaged.
Check the level of the foreline pump oil and, if necessary, add more oil. See
Adding Oil to the Foreline Pump
Possible Remedy
Check the foreline pump and plumbing for leaks to ensure the fore pressure is low enough for use. You can check the convectron gauge
readback to confirm the foreline pressure falls to less than 1 Torr.
Содержание ISQ 7000
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Страница 174: ...2 Troubleshooting Contacting Technical Support 146 ISQ 7000 Hardware Manual Thermo Scientific ...
Страница 400: ...3 Advanced Maintenance Replacing Fans and Filters 372 ISQ 7000 Hardware Manual Thermo Scientific ...