Scans by ArtekMedia © 2007
Drawing the Standard Grid
Pressing
(SHIFT) STANDARD GRID
causes the HP
7090
to draw a standard
centimetre grid
(1
cm between grid hnes) on the plotting medium with the
currently selected pen. The standard grid is not affected by grid division
settings or recording area size. For A- and A4·size paper the standard grid
is always 25 X 18 cm; for
B·
and A3-size paper it is 38 X 25 cm. If desired,
plots can be drawn on the standard grid by positioning the zero and full
scale points on intersecting grid lines so that the proper recording area is
obtained.
Rotating the Recording Area
Rotated
Hardcopy
Plots
(AIA4-Size Paper)
Recording areas
are
normally oriented so the X-axis is plotted along the
long length of the paper. However, an HP
7090
function enables you to
rotate recording
areas
90°
so the X-axis is plotted along the short length of
the paper. This function may be desirable for applications that require
rotated orientation of plotted measurements - preparing graphs for verti
cal display in a three-ring binder, for example. The illustration below shows
recordings that were made using the rotate function on AlA4-size paper.
I
',,!.
To invoke the rotate function, press
SHIFT
while holding down the
FAST
push button on the left front panel. This positions the zero and full-scale
points so that the X-axis runs along the short length of the paper. To verify
this has occurred, press
ZERO,
then
FULL SCALE.
The pen holder will move to
the i�itial rotated positions
as
shown by the following diagram.
The zero and full-scale points may be repositioned to obtain the desired
recording area. (Remember that, when viewing the recording area with the
positive X-axis extending to your right, the full-scale point should always
be positioned above and to the right of the zero point.)
3-20
Measurement Setup Operations