110 Chadwick-Helmuth Company, Inc.
Chapter 5 - General Operation
3. Select the per-revolution (frequency) input by pressing the
AZIMUTH
context key. The default is one per revolution.
NOTE: The use of a one-per-revolution azimuth signal is not
required to obtain a spectrum, but its value in separating
harmonically related peaks from other unrelated peaks is useful.
4. Select the range of interest (active orders) by pressing the
0-<24,000>RPM
(Vibrex 2000) or
0-<600,000>RPM
(Vibrex 2000 Plus) context key. See Section 5.6.1.1 “Ranging
Feature” on page 111 for details.
Frequency Ranges -
The available Spectrum Analysis feature
frequency ranges (in RPM) for the Vibrex 2000 are
• 0 to 1500
• 0 to 3000
• 0 to 12,000
• 0 to 24,000
The available Spectrum Analysis feature frequency ranges (in RPM) for
the Vibrex 2000 Plus are
• 0 to 1200
• 0 to 3000
• 0 to 6000
• 0 to 12,000
• 0 to 30,000
• 0 to 60,000
• 0 to 120,000
• 0 to 300,000
• 0 to 600,000
NOTE: When the maximum range is selected, the orders list will
show no IPS at the low ranges (first four bins of the FFT) of the
balancer will not show any IPS.
NOTE: To select the optimum frequency range, multiply the
primary frequency by 12 and choose the nearest frequency range
that corresponds to that value.
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