9 Monitoring the GC
9.4
9.
100
GC-2010 Plus
9.4Zero Point Adjustment
Execute zero point adjustment when the baseline is greatly off from zero. Press [Zero Adj] (PF
menu) to perform zero point adjustment. Adjustment can also be made for any value.
9.4.1 Screen description
Press [Zero Adj] or [Zero Free] (PF menu) from the [Monit] key main screen, the chromatogram
displayed on the monitor screen changes as shown in Fig. 9.4.1 or Fig. 9.4.2.
Press [Up] or [Down] (PF menu) to adjust the baseline level manually.
Zero point adjustments are effective not only for the GC monitor screen, but also a con-
nected pc or Chromatopac. However, zero point adjustments made on the Chromatopac do
not adjust the monitor screen baseline level.
NOTE Zero point adjustments are only valid for the currently displayed detector. To adjusts the zero point for
another detector, first switch to its display by pressing [Chng Line] (PF menu), then execute the adjust-
ment.
Fig. 9.4.1 Zero point adjustment Fig. 9.4.2 Zero free adjustment
Since the [Down] has been held down too long,
the zero point has deviated into the negative zone.
[Down]
(Held down)
[Up]
(Held down) [Zero Adj]
[Zero Adj]
[Zero Free]
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