MODEL 1000
SEP 2005
MAINTENANCE
5-15
5.5.4.3
Baseline Drift
To ensure that the baseline is not drifting, compare the baseline upsets caused by valve actuations
with those of the chromatogram provided with the Operational Parameters Sheet. Ensure that no
evidence of component elutions is present when no sample is being injected.
If differences exist between the two chromatograms, the problem may be due to one or more of the
following:
1.
Programming of events
2.
Contamination of valve sealing diaphragms by foreign matter
3.
Improperly adjusted flows
4.
Leaks in the carrier system
5.
Column deterioration due to liquid contamination from a sample
6.
Misidentifying peaks
A noisy baseline can be caused by carrier leaks, an electronic failure in the Preamplifier, a faulty
power supply, or defective thermistors in the detector. If the baseline is still noisy after correcting
for leaks, perform the Detector Bridge Balance procedure before replacing the detector thermistors
or the preamplifier board.
Summary of Contents for Daniel Danalyzer 1000
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Page 18: ...SEP 2005 MODEL 1000 DESCRIPTION 1 6 Figure 1 1 GC System Functional Block Diagram ...
Page 38: ...SEP 2005 MODEL 1000 EQUIPMENT DESCRIPTION 2 6 Figure 2 1 Analyzer Components ...
Page 146: ...SEP 2005 MODEL 1000 INSTALLATION AND SETUP 3 92 Figure 3 37 Analyzer Components ...
Page 188: ...SEP 2005 MODEL 1000 MAINTENANCE 5 20 Figure 5 2 Analyzer Components ...
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Page 228: ...SEP 2005 MODEL 1000 LIST OF APPENDICES A ii This page intentionally left blank ...
Page 260: ...SEP 2005 MODEL 1000 SETTING SOLENOID PURGE FLOWS E 4 This page intentionally left blank ...
Page 282: ...SEP 2005 MODEL 1000 ANALYZER DRAWINGS Addendum 1 2 This page intentionally left blank ...
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