ACES SYSTEMS Viper II, Руководство пользователя

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Gen II
User Manual
19-2 – Monitor Overall Chapter 19 Revision 2.10, Apr 2020
Viper II Cobra II
19.1.1.3. The cursor will begin in the “ RPM/Hz ” field. Determine if the required frequency units
are revolutions per minute (RPM) or cycles per second (Hz). Press the [

] key to toggle
between the frequency unit selections in the field. Use the [

] key to move down to the
next field.
19.1.1.4. Use the [

] key to move to the minimum frequency field, immediately to the right of the
frequency unit’s field. Use the analyzer keypad to enter the minimum frequency of
interest for this survey relative to the frequency units selected in paragraph 19.1.1.3
above. If you desire a high-pass frequency, such as 40 Hz, the minimum frequency field
should reflect this as the minimum frequency of interest. Use the keypad to enter the
minimum frequency into the first field.
19.1.1.5. Determine the maximum frequency requirements. For instance, if the frequency of
interest is 300 Hz, you might choose a minimum and maximum frequency that will place
the 300 Hz in the center of the range. The minimum might then be 250 Hz and the
maximum 350 Hz for instance. You might also consider other factors such as Harmonics.
If you want multiples of the fundamental frequency included in the frequency range,
determine to what extent that need is (1X, 2X, 3X and so on) then extend the frequency
range to include it. For example, 300Hz is the frequency of interest, the fundamental
frequency. If you want 3X harmonics included in the frequency range you must multiply
the fundamental frequency (300 Hz) X the harmonic range (3X) and arrive at an upper
range of 900 Hz. Use the keypad to enter the maximum frequency into the second field.
NOTE
Sensor Channels C & D are only available on the Viper II
19.1.1.6. Use the [

] key to move to the “ Units ” column of the Channel A row. The “Units” field
determines the engineering units in which the amplitude, or “Y” axis, of the spectra will
be displayed. Consult the appropriate equipment maintenance manual for specific
requirements of a vibration survey or for analysis guidelines. Use the [

] or [

] keys to
scroll through the selections in this field. The available selections are: G’s (equivalent
gravities), IPS (Inches Per Second), mm/sec (millimeters per second), cm/sec