Double Graph Menu - Ametek 7280 Instruction Manual

Chapter 5, FRONT PANEL OPERATION

5.3.25 Double Graph Menu

5-48
moved fully to the left then the displayed data scrolls to the right in groups of ten
points, allowing earlier data to be shown.
If acquisition is in progress then the cursor is automatically positioned at the right-
hand side of the display area and cannot be moved.
Pressing the Previous Menu key on the front panel exits the Single Graph menu and
returns to Main Menu 2.
When Main Menu 2 is displayed, pressing a key adjacent to the Double Graph item
accesses the Double Graph menu, which is shown in figure 5-30.
The double graph display is similar to that of the single graph, but displays two
curves.
If there is no data in the curve buffer then the graph will show two horizontal straight
lines representing zero. If curve storage is already running, or if there is data in the
curve buffer, then two curves will be displayed with the most recent values at the
right-hand side of the screen.
Figure 5-28 shows the layout of the double graph display. The two curves are
displayed in the central section of the display, with the keys on either side being used
to adjust the axes and to select the data to be shown, as follows:-
SCALE keys
The keys to the left-hand side of the display are used to set the upper and lower limits
of the vertical axis in 1% increments, with the top and upper-middle
being used for the upper curve (Curve 1) and the lower-middle and bottom
keys for the lower curve (Curve 2). Pressing both sides of one of the key pairs
simultaneously automatically sets the relevant limit to match the range present in the
visible section of the displayed curve.
Figure 5-30, Double Graph Menu
keys