23 Trends
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The cursors are represented by a vertical line from the x-axis and a dotted horizontal line from the y-
axis. When two cursors are used, they can be locked using
Lock/ Unlock, so that the distance between
them is fixed. Moving a cursor will then move both together. Select
Lock/ Unlock again to separate
the cursors and move them independently again.
A summary column on the y-axis shows the lower, middle and upper ranges as determined by the
cursor positions. When only one cursor is used there will be a lower and an upper range. Color shading
is used to differentiate the ranges in the cumulative column and to highlight the columns between the
cursors.
Setting Up Trends
Trends are set up in Configuration Mode. You can make temporary changes to trends settings such as
trend groups, priorities, or scales in Monitoring Mode. The general settings for all Trends are under
Main Setup, Trends.
Settings for a single segment in graphical trends or for the corresponding trend group can be made
more easily in that segment menu.
Making Segment Settings
The Graphical Trends window is divided into measurement segments, each of which has its own
settings.
To enter the segment menu,
• select the left hand column of the segment, where the measurement label is displayed.
Expanded View
To expand the segment to fill the Graphical Trends window,
•in the
Segment menu, select Expand to have that segment enlarged to fill the window.
In the expanded view, you can also highlight a measurement to make it more easily visible (for example
when multiple ST trends are in one segment). To highlight a measurement,
•in the
Segment menu, select Highlight repeatedly until the highlight is on the required
measurement.
To return the segment to its original size,
•in the
Segment menu, select Expand again.
Trend Scales for Segment Measurements
To change the trend scales for a measurement in the current segment:
1 In the Segment menu, select the measurement label.
2 Select Upper to change the upper limit of the scale or Lower to change the lower limit of the scale.
Optimum Scale
To have the monitor automatically select an optimum scale for viewing, based on current values,
•in the
Segment menu, select Optimum Scale.
This scale change is temporary. When the graphical trend window is closed the scale reverts back to
the setting in
Parameter Scales.
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