SERVO
PRO NANOCHROME Gas Analyser
68
04416001A / Revision 7
The
maximum (peak) start
reduction factor
and
maximum (peak) end
reduction factor
are expressed as a percentage of the peak full-scale width.
For example, if a peak has a full-scale width of 150 seconds, a reduction of
10% means 15 seconds maximum reduction. These parameters are
determined by injecting a low concentration which is near the limit of
quantification, typically 5% of the range or 3 times above the limit of
detection (LOD).
The peak start and peak end of the low concentration peak in Figure 27 are
determined and used to configure the
max start reduction factor
and
max
end reduction factor
. If the
max start reduction factor
has been set to 15%
and the
max end reduction factor
has been set to 30%., then at the
maximum, the total window is reduced by 45%.
Yellow integrated peak:
If a peak is detected, the filtered peak it
appears as in yellow peak in the real-time menu. The raw signal is
shown as a red peak.
Report software:
Only the raw chromatogram is sent to the
Report Software.
Filter Collapse:
The
filter collapse
threshold is used to reset the filter and improve response
time. The parameter is a percentage of the analyser range. For example, if the
parameter is set to 1% for a range of 1000 ppb, the filter will reset if two
consecutive unfiltered peaks have a difference of more than 10 ppb.
Blank Set Parameters:
The
Blank Set Parameter
is used to correct for baseline integration on blank
(zero gas) in order to provide a more accurate measurement at low
concentration.
