VC-6000
TM
Compact monitor Part C Cyclic peak-peak measurement
- 52 - C100583.002 Components Vers. 07 © VC-6000
TM
Compact monitor Sept. 2011
♦ <Max. meas. time>
The parameter „Max. Measurement time“ defines an upper time limit for
the actual measurement. Normally the actual measurement time is
clearly determined from the selected bandwidth.
Minimum: 0.1 s Maximum: 99.99 s Step size: 0.01
Works pre-setting 2.0 s
♦ <Bandwidth>
The parameter „Bandwidth“ determines the frequency resolution of the
measured vector and thereby also the required measurement time for
achievement of this bandwidth (selectivity). The bandwidth is always a
constant relative bandwidth because the vector measurement should
always have a selectivity which is largely independent of the rotational
speed.
Bandwidth:
• 44 %
• 22 % (Works pre-setting)
• 11 %
• 6 %
• 3 %
Corrresponding meas. time:
• 1 Trigger period
• 2 Trigger periods
• 4 Trigger periods
• 8 Trigger periods
• 16 Trigger periods
Note:
Note that the actual measurement time is determined decisively by the given
trigger frequency (machine rotational speed). At very low rotational speeds
and a selected bandwidth that is too narrow the set „Max. Meas. time“ can
force a measured value with an increased bandwidth.
Example:
Trigger frequency = 0.5 Hz
Set bandwidth = 22%
Set maximum measurement time = 1 s
Set factor = 2
Required bandwidth for 22% resolution at 1 Hz = 2 s
Actual measurement time = max. meas. time = 1 s
Achieved resolution for the vector measurement value = 22%
See also chapter 17.2.3
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