ACES SYSTEMS Cobra II, Руководство пользователя

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Gen II
User Manual
19-4 – Monitor Overall Chapter 19 Revision 2.10, Apr 2020
19.1.2. – Speeds (Viper II only)
19.1.2.1. Press the [F2] “ Speeds ” key from the Overall Vibration Setup screen shown above in
paragraph 19.1.1.2. 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.
19.1.2.2. The column of numbers to the left side of the fields represents the four speed input
channels, TACH 1, 2, 3, and 4. In the “
Measure ” column, use the [

] or [

] key to
select from “Pulse S”, “Pulse D” or “None” indicating the tachometer input type for the
tachometer input channel indicated. NONE is selected when the corresponding tach
channel is not being used. Only pulsed inputs such as a Phototach, Lasetach or magnetic
pickup may be used with the Viper II Analyzer. This pulse input may be, but is not
necessarily a once-per-rev pulse. The preference is actually a multi-pulse per revolution
input. The D or S in the selection depicts either single ended (S), which supplies power to
the output for use with a Phototach or Lasetach, or differential (D), which does not
supply power at the tach device for use with a magnetic pickup or monopole.
19.1.2.3. The “ DESC ” column is the descriptive name for the tachometer input such as “N1”,
“N2”, or “Fan”. Enter up to five alphanumeric characters in this field. The description
should be one that all users of this setup are familiar with and easily understand.
19.1.2.4. The “ 100% Spd ” column is used to enter the rpm at 100% of component speed. Use the
keypad to enter the value in the “100% Spd” field. The example above shows “4800” and
“10000” for “N1” and “N2” respectively. This will cause the analyzer to also display the
component speed in percent during data acquisition. Therefore, when used on an engine
spool, N1 or N2 for example, the analyzer’s indication will match the cockpit indicator.