Investigating Stability Issues; Mass Assignment Is Unstable; Signal Response Is Unstable Or Shows Unexpected Drop-Out - Thermo Scientific ISQ 7000 Hardware Manual

Investigating Stability Issues

Mass assignment is unstable.

Possible Remedies
Wait at least 30 minutes after the system has reached vacuum before running a mass calibration. If the system was recently pumped
down, the internal components may not be at temperature yet. Wait two to four hours to assure stability.

Signal response is unstable or shows unexpected drop-out.

Possible Remedies
There is a problem with the filament or lens control. See
Check the system for leaks and address them. See
There is a contamination problem. See
The lenses are not making good electrical contact. Remove and replace the ion source cartridge after the ion source has had time to reach
a stable temperature.
Thermo Scientific
Stability issues occur when the instrument is not consistently precise and when accurate
results are not reproducible. In addition, sample preparation, spiking errors, sample injection
errors, and lack of routine maintenance on the instrument may cause false stability symptoms.
Before troubleshooting for stability issues, try simple solutions first, such as cleaning the ion
volume and lenses or running a leak check diagnostic.
WARNING ELECTRICAL SHOCK HAZARD: When troubleshooting any issue that requires
removing a cover on the ISQ 7000 mass spectrometer, you should power-off and vent the
instrument to avoid harming yourself.
AVERTISSEMENT RISQUE D'ÉLECTROCUTION : lorsque vous cherchez à résoudre un
problème nécessitant d'enlever le couvercle du spectromètre de masse ISQ 7000, mettez
hors tension et ventilez l'instrument pour éviter de vous blesser.
Investigating Filament and Lens Control Issues
Investigating Vacuum Issues
Investigating Contamination Issues
for details.
for details.
2
Troubleshooting
Investigating Stability Issues
for details.
ISQ 7000 Hardware Manual 141