Gen II
User Manual
16-4 – Monitor Spectrum
Chapter 16
Revision 2.10, Apr 2020
paragraph 16.1.1.13 below. If an accelerometer is being used, you must also use an external
converter to convert the actual input to the analyzer to velocity (IPS) input. Cobra II is limited to
None, G’s, IPS, mm/sec, cm/sec, Volts, m/s/s, and cm/s/s.
16.1.1.10.
Use the [
] key to move to the “Mod” (Modifier) field. This is Modifiers relevant to the
engineering units specified in paragraph 16.1.1.9 above. Use the [
] or [
] keys to
toggle through the available selections in the field which are: Peak, Pk-Pk (Peak to Peak,
sometimes referred to as Double Amplification or DA), Avg. (Average), and RMS (Root
Mean Square). Consult the appropriate equipment maintenance manual for specific
requirements of a vibration survey or for analysis guidelines.
16.1.1.11.
Use the [
] key to move to the “MaxValue” field. The “MaxValue” field is a toggle
selection field. Use the [
] or [
] keys to toggle through the available selections for the
field. This scale refers to the number of engineering units of vibration amplitude specified
in the previous field. The full scale indicates the maximum vibration amplitude you
expect to acquire or the maximum amplitude of interest. Choose the amplitude that will
adequately display the full amplitude of any specified limits as a minimum. If you do not
expect amplitudes in excess of what would normally be experienced for the equipment
application, set this field as low as possible while still allowing sufficient space to display
the maximum limitations as stated above.
16.1.1.12.
Repeat paragraphs 16.1.1.9 through 16.1.1.11 for all channels you intend to use for this
job.
16.1.1.13.
Use the [
] key to move to the “Sensor” column for “Channel A” row. Scroll through the
choices in this field using the [
] or [
] keys. The available choices are dependent on
the number of sensors you have programmed into your analyzer. (See Chapter 22
Analyzer Management, for sensor setups.)
16.1.1.14.
Use the [
] key to move to the Channel “Desc” column for “Channel A” row. You define
this optional field. The field will accept any alphanumeric characters entered from the
keypad. This field is used as a description for the individual channel such as “Lat” and
“Vert” or “GBox” and “Core.”
16.1.1.15.
Repeat paragraphs 16.1.1.13 through 16.1.1.14 for each of the channels you intend to use
for this job.
16.1.2.
– Speeds (Viper II only)
16.1.1.16.
Press the [F2] “Speeds” key from the Spectra Setup screen shown above in paragraph
16.1.1.1. The Speeds option allows you to measure several types of speed inputs for
synchronizing with the vibration input or to provide an entry field for reference where no
actual speed input is available. This allows you to view amplitude, in the selected
engineering units, relative to the speed of the machine or component being monitored.
