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4. Press the CHECK button to confirm the full width at half maximum (FWHM) for each
peak and how AC is applied (peak separation and signal strength). At the start of this
check, "CHECKING…" flashes green in the status display. The display reverts to
"WAIT…" when the check is complete.
4.1 Checking the high mass-number range (414, 502, 614)
The high mass-number range is adjusted using MZ AC0 and AC Gain parameters.
With insufficient AC, peak separation deteriorates and the Valley value increases,
as shown in Fig. 4-1. Increase AC Gain to increase the amount of AC applied.
With excess AC, as shown in Fig. 4-2, the peak separation is good but the signal
strength (sensitivity) deteriorates. In this case, decrease AC Gain as much as
possible without decreasing the peak separation.
Fig. 4-1 Insufficient AC
Poor peak
se
aration
Fig. 4-2 Excess AC
Low signal strength
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