ACES SYSTEMS Cobra II, Руководство пользователя

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Gen II
User Manual
15-17 – Overall Vibration Survey Chapter 15 Revision 4.10, Apr 20
15.1.8.4. – Function Key Options when viewing Spectra
15.1.8.4.1. Pressing the [F1] “Options” key will change the [F1], [F2], [F3], [F4] and [F5] boxes to
read “Cursor”, “X Scale”, and “Y Scale”, “View” and “Cancel” respectively as shown in
the figure below.

Pressing the [F1] “Cursor” key will change the [F1], [F2], [F3] and [F5] boxes to read
“Normal,” “Harmonic,” “None” and “Cancel” respectively. The functions of the “F” keys
will continue to change as the screens change.
 Pressing the [F1] “Normal” key will produce a normal cursor (green box in screenshot
below) on the screen accompanied by an X and Y scale value readout box in the upper
right corner of each displayed spectra (see the following figure). These X and Y values
are relative to the current position of the cursor only. The cursor can be moved along the
X- (horizontal) axis of the spectra by pressing the [

] or [

] keys. Hold down the key
for large and rapid incremental changes. The value of the X-axis (frequency) and Y-axis
(amplitude) will be displayed for the current position of the cursor. Incremental values
are determined by the number of lines of resolution specified in the setup screen.
 Pressing the [F2] “Harmonic” key will produce multiple harmonic cursors (yellow boxes
in screenshot below) according to the specified frequency range. When this key is
pressed, cursors will appear to the right of the fundamental frequency identified by the
leftmost cursor. For example, if the fundamental frequency is 300 Hz cursors will be
placed at 2x (600 Hz) 3x (900 Hz) 4x (1200 Hz) and so on until the upper frequency limit
of the screen is met. When the primary cursor (for the fundamental frequency) is moved,
the multiple harmonic cursors will automatically follow the movement and position
themselves at the new multiple of the fundamental frequency.
 Pressing the [F3] “None” key will remove any cursor currently displayed on screen. The
boxes above the [F1], [F2], [F4] and [F5] keys will return to “Maximum,” “Pause,”