Additional Detector Operating Problems - Thermo Scientific Vanquish VF-D20 Operating Manual

8.3.4

Additional Detector Operating Problems

Symptom
Baseline noise
and/or poor
precision
High gas flow ratio
Low gas flow ratio
Vanquish Charged Aerosol Detectors Operating Manual
This section provides additional issues that may arise during operation of
the Vanquish charged aerosol detector. Locate the table for the type of
symptom you have, find the possible cause, and use the description of
the solution to help you solve your problem quickly.
Also check the Chromeleon Audit Trail for a related message if an
operating problem occurs. The message may provide additional
information.
Note that this section provides information on symptoms and causes
directly related to the Vanquish charged aerosol detector. For
information about troubleshooting for the Vanquish system, refer to the
Vanquish System Operating Manual.
TIP If you are unable to resolve a problem following the instructions
given here or if you experience problems that are not covered in this
section, contact Thermo Fisher Scientific Technical Support for
assistance.
Possible Cause
Change in background
current
Unstable gas regulator
pressure
Unstable evaporation
temperature
Clogging in the detector
Gas leak
Remedial Action
If the Background_Current signal channel is changing, this can
indicate a contamination in the flow path of the system. Make
sure that all components in the liquid flow path are free from
contamination.
If the GasReg_Pressure signal channel shows an instability in the
nebulizer gas pressure, this can lead to baseline noise and/or poor
precision. Check that the gas supply pressure is stable. If the
instability remains, contact Technical Support.
If the Evap_Tube_Temp signal channel is unstable, this can lead to
higher baseline noise and/or poor precision.
Contact Technical Support.
Check the Audit Trail for the respective message. See
Messages, page 155.
8 • Troubleshooting
section 8.2
Page 161