Axis BTA 2100D Manual del operador descargar pdf (Pagina 490)

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You can scale vertically using the Attenuation Control to the right of the Main

Window. This adjusts the amplitude range on a logarithmic scale. When using

the attenuation control, the lowest point of the active trace is fixed, and the

amplitude range is adjusted to a smaller range as you slide the position indicator

up and to a larger range as you slide it down.

You can zoom in the amplitude and time axes in the same way as you do in the

Main Window. You can select a rectangular section of the axis, PowerZoom, and

double click in the axis. These actions zoom just like they would in the Main

Window, except that only the amplitude scaling is affected when zooming in the

amplitude axis and only the time scaling is affected when zooming in the time

axis.

Autoscaling

Interactive Graphics automatically determines the maximum and minimum

values in the chromatogram. In determining these values, it ignores any

chromatogram sections during which an Inhibit Integrate (II) or a Solvent Reject

(SR) time event is in effect. It uses these values when displaying a

chromatogram at full scale. So when you double click in the Locator Window to

expand the Main Window to display the entire active chromatogram, the

chromatogram is displayed so that the minimum and maximum amplitudes are at

the bottom and top of the window.

Moving Baselines

You can modify baselines and droplines by clicking on a peak start/end event for

the active chromatogram and dragging it to a new location. Notice that as you

drag a peak event, the Main Window Information Panel will display the type of

event being moved, and will constantly update the time and amplitude of the new

peak event location. You must reintegrate to view the effects of the moved peak

events on the results. Peak information for affected peaks will not be available

once a peak event is moved.

NOTE: You can only modify baselines when the peak event shape is a triangle.

Moving baseline points is disabled when the peak event shape is a line, or when

peak events are not shown.

All events can be moved other than peak apices or events generated by the use

of a Forced Peak (FP) and Split Peak (SP) time events. An easy visual way to

determine if a peak event can be moved is to slowly move the mouse over a

peak event. If the peak event can be moved, the mouse cursor will change from

the cross cursor to the arrow cursor, otherwise, the cursor looks like:

either case, a tool tip window is displayed showing the time, amplitude, and type

of peak event.

A peak event can be moved to within one tenth of one data point in time of an

adjacent peak event. By default, a peak event can only be moved so that it

touches the chromatogram trace. Hold the control key down while dragging the

peak event to move it away from the chromatogram trace. Peak events are

drawn as solid triangles or thick lines when moved as opposed to hollow

triangles or thin lines when in the original position determined by data handling.

To reset a peak event to the original position determined by data handling, click

on the event with the right mouse button and select the Reset to Original Position

menu item displayed. To reset all moved peak events to their original position,

select Reintegrate Now/Clear Moved Events from the Results menu.

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