VC-6000
TM
Compact monitor Part C Peak measurement
- 36 - C100583.002 Components Vers. 07 © VC-6000
TM
Compact monitor Sept. 2011
10 Peak measurement
10.1 Function
♦ The peak value describes the largest dynamic excursion of a vibration
signal (AC signal) from its position of rest or centre point. Thus it is a
measurement variable which, in contrast to an RMS value, is not directly
linked in any way to the signal energy.
♦ The peak measurement is an optional signal path component. As a
configuration interface, it also contains a group of parameters necessary
for the setting.
♦ The physical unit of peak measurement is determined through the
preliminary components in the signal path, especially by the sensor /
Sensor (A/B) block.
♦ The results of the peak value are updated without any time delay in the
case of continuous measurement.
♦ The time conduct of the peak measurement is determined by the
adjustable rise time and decay time parameters.
♦ The current measured value can be displayed using the User-terminal.
♦ The current measured value is also available as an analogue DC output
signal for connection to peripheral electronic equipment.
♦ The current measured value can be read through the COM-interface of
a downstream OPC-server.
♦ The peak measurement can be monitored for setpoint violations through
one or more Monitor Blocks.
10.2 Parameters and their setting ranges
♦ <Rise time>
The rise time parameter corresponds to the charge time constant of the
peak value measurement. The rise time can be changed within its
setting range.
Setting range of the time constant for the rise time:
Minimum: 0 ms Maximum: 99 ms Step size 1 ms
Works pre-setting 3 ms
Advice for setting the rise time:
A longer rise time smooths out a fast signal response. The resultant peak
value will finally be lower than it would be with a short rise time.
With a rise time of 0 ms the actual maximum value in the signal curve will be
acquired as the peak value.
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