Smart Avionics PB-4, User Interface Manual

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2.3.3. Show Waveform button
Clicking this will open a dialog that shows the current acceleration waveform.
2.3.4. Polar Options button
Clicking this will toggle the display of the polar options box, the options in the
box are:
• The Propeller/Rotor Mode button pops up a menu that let's you choose the
polar mode for the current job.
• Drop down menu, Axis 1 lets you choose the axis to be displayed in the
points list and polar chart.
• The Point Smoothing text input box is used to specify the number of
readings that are averaged together to produce a single polar point. A low
value will allow more variation in the polar points and the display will react
more quickly to input changes (i.e. changes of RPM). A large value will tend
to smooth out variations in the polar points but will make the display slower
to react to input changes so you will need to wait longer for the point to
settle in the averaged position. The value should be between 1 and 50, the
default is 15.
• The Weight Sites text input box is used to specify the number of locations
that balance weights may be attached to. For a typical propeller balancing
job, this would be the number of fasteners that hold the spinner to its
backplate. It cannot be less than 3.
• The PSRU Ratio text input box is used to enter the ratio of the engine to
propeller step down gearbox. If your engine has a PSRU and you know the
ratio, enter it here as a single number (i.e 2.43 rather than 2.43:1). If you
don't know the ratio or the engine doesn't have a PSRU, enter 1. When
applicable, using a value other than 1 allows the software to calculate the
engine RPM from the propeller RPM and this information can be used to
help identify the source of peaks that may occur in the spectral display.
2.4. Point details dialog
This dialog displays the detailed information for the selected point along with
some text input boxes and buttons as shown in Fig 2.5 . To open this dialog
simply click the selected point's row in the point list a second time. The buttons
are:
• The Hide This Point button will make the current point “invisible”, i.e. it will
not be displayed in the points list or shown on the polar chart unless the
point visibility menu is set to All. When a point has been hidden, this button
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Show Waveform button