DH Instruments FPG8601, Руководство по эксплуатации и обслуживанию

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6. FPG TOOLS
Page 51 © 2007 DH Instruments, a Fluke Company
Figure 20. <Custom Plot Properties>
Table 7. <Custom Plot Properties>
Tab Fields
FEATURES DESCRIPTION
Plot Selection
(button)
Press this button to plot the currently selected custom plot. Double clicking a
custom plot in the list has the same effect.
Plot
Description
(text entry)
Enter text that describes the data that will be plotted. The text entered will
appear in the list of custom plots and at the top of plots generated using this
plot selection.
X Axis Data
(list box)
Select the data that will display along the X axis. The text of the selection
followed by units (when appropriate) will appear along the bottom of the plot.
Press the button next to the drop down list to change the text to associated
with
<X Axis Data>
. The exact text as entered will appear on the X axis of
the plot
Y Axis Data
(list box)
Select the data that will display along the Y axis. The text of the selection
followed by units (when appropriate) will appear along the vertical axis of the
plot. Press the button next to the drop down list to change the text to
associated with
<Y Axis Data>
.
6.3.4.2 STRIP CHARTS
The FPG pressure and pressure rate can be updated on strip charts. Strip charts
can be created without taking data by using the menu choices below the
[Custom Plot]
choice. Alternatively, double click the
<FPG Pressure>
or
<Rate>
fields on the
<Run Display>
to begin a strip chart. Strip charts display
the most recent 200 updates of the FPG pressure values until 500 points have
been taken. At this point, the strip chart is reset and continues updating starting
with point number 1. Close the strip chart window to disable the strip chart function.
Strip charts are useful when trying to determine the stability of the FPG pressure.
In some calibration scenarios, a needle valve must be used to compensate for
the FPGs lubrication flow. In these situations, a user must isolate the DUT and
adjust the needle valve so that the FPG pressure rate is effectively 0 prior to
exposing the FPG to the instrument. A simple way to determine the effective rate
is to look at a strip chart of the FPG pressure rate. If the rate is oscillating about
0 for 200 samples, it is fare to say that the rate is effectively 0.