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3-22
Options
*'Fixed range', e.g. for a runup / coast-
down curve or impact test.
Tip: Carry out a test measurement
in order to determine the maximum
Measurement setup for
- Runup/coastdown analysis (right)
- Overall vibration value (left)
Order (with Phase, Orbit, Coastdown measurement)
Order filter for the harmonic vibration components of the signal.
For example, only the signal components of the 1st harmonic are
filtered out and displayed by the first order filter. A half order is
used for detecting oil whirls in machines with journal bearings.
Pulse per rev. (with RPM measurement): Number of measurement
amplitude.
marks on the shaft or coupling.
Measurement range (all vibration measurements): The measurement
range for the analog channel (A/B) can be automatically matched
to the input signal ('Auto') or set to fixed*. When set to '[Value]
/ Auto-Up', the measurement range is automatically increased
when the upper limit is exceeded.
Low pass filter (Phase, Amplitude Coast-down - Phase): To suppress
high frequency noise signals, a low pass filter (1 kHz) can be
activated (Yes). In a coastdown measurement the low pass filters
(1 kHz / 10 kHz) are set automatically as a function of the start
and stop speeds. With 'No', the signal is processed without a low
pass filter.
Window / Number of lines (Impact test): The standard window
function for the impact test with an impulse hammer is the
rectangular window; all other parameters are described in
section A2.
Negative Averaging (Impact Test): Enables an impact test while the
machine is running (1 channel and 2 channels with impulse
hammer). The signals from the running machine are filtered out.
FRF calculation (2-ch impact test): Calculation procedure for the
transfer function - (Frequency Response Function = FRF).
Trigger type / level / start
(Shock Pulse, Vibration overall Value, User AC, Impact Test)
Level: The measurement starts as soon as the signal has
exceeded the selected trigger level (in % of the max. meas.
range). Signal recording can be started before or after the trigger
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