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Chromatography troubleshooting: (Continued)
Symptom
Baseline noise,
random
Possible cause
Air in detector
Solvents not properly
degassed
Bubble detected
Solvents contaminated
Column contaminated
Dirty flow cell
Analog output cable not
properly connected
between the separations
module and data
system, recorder, or
integrator
System improperly
grounded
Recorder voltage
incorrect
Unit not cooling
properly
Radio frequency noise
Defective detector
Corrective action
Purge detector to remove air.
Degas solvents.
Reprime the solvent
management system. Remove
and vacuum filter solvents.
Use fresh solvent.
Clean/replace column.
Clean flow cell.
Properly connect cable.
Plug into outlet on different
electrical circuit.
Use power conditioner.
Set recorder to correct voltage.
Operate unit with covers in
place. Confirm prescribed
clearance at the rear of device.
Perform the Defrost Sample
Procedure (see
sample heater/cooler function"
on page
240).
Eliminate interference.
Troubleshoot detector.
July 29, 2013, 715003794 Rev. B
Troubleshoot
"Defrost
249
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Table of Contents
Troubleshooting
