4
④
Setting the high-pass filter and low-pass filter
Set the “High-pass filter” and the “Low-pass filter” in the [Analog Input] submenu, according to the
measurement purpose.
The followings are examples of setup for typical vibration measurements.
◆
Setup for the unbalance or misalignment measurement
High-pass filter:10 Hz
、
Low-passfilter:1 kHz
◆
Setup for the bearing defect measurement
High-pass filter:1 kHz
、
Low-passfilter:20 kHz
⑤
Attaching the accelerometer
Attach the accelerometer to the measuring point of the object. Since an impulsive vibration occurs when
attaching the accelerometer, it is necessary to wait about 30 seconds until the influence of the impulsive
vibration disappears.
Moreover, it is necessary to care about the contact resonance frequency of the
accelerometer which depends on the mounting method.
The desirable measuring points are as follows.
・
A point near the measuring object.
・
A rigid point.
・
A flat and smooth point.
・
A point without thick paint.
⑥
Measurement by each analysis function
The explanations about common setups end here. Actual vibration measurement is performed by Vibration
meter mode, Time waveform mode, and FFT mode.
Refer to the subsequent pages of this manual for the details of the measurement procedure for each analysis
function.
Setting the Low pass filter
Setting the High pass filter