Baseline correction
The baseline can drift if the detector is contaminated or
if the supply gases are not pure. A baseline correction
can be triggered to ensure that the recorder does not run
to the limit. The chromatograph stores the actual value
of the signal at this moment. From now on, it subtracts
this value from the detector signal. In other words: if a
baseline correction is triggered, the recorder output
jumps at this moment to zero or to the value you have
entered as the baseline offset.
Executing a baseline correction
Select the function Signals in the selection display,
move the cursor to the desired channel and press the
key .
NOTE:
Only carry out a baseline correction at positions in the chro-
matogram where no peaks are present.
Cancelling the baseline correction
Select the function Signals in the selection display,
move the cursor to the desired channel and press the
key .
F9: Baseline correction
F10: w/o basel.corr.
0
100
baseline correction
baseline offset
% recorder deflection
time
Chromatogram on the recorder
5SCHREIB.CHP, Stand Dezember 22, 1999
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