HAUBER-Elektronik GmbH
17
13.4
Bearing status parameter for roller bearing diagnostic
The monitoring of the HE250 has a bearing status parameter identification for the roller bearing
diagnostic in accordance with DIN ISO 13373-3.
In accordance with DIN ISO 13373-3, the bearing status parameter observes the ratio of the
highest peak acceleration value in m/s
2
to the effective acceleration value in m/s
2
rms. An
averaging time of t=1s is established for the effective value of the bearing status parameter. The
highest peak value is determined over the duration of the averaging time, meaning t=1s here as
well.
The frequency range to be observed is between 10Hz
–10kHz. The signal ratio serves to
diagnose the bearing status for roller bearings, in line with the crest factor.
Norm DIN ISO 133373-3 categorises the roller bearing status into four ranges:
Fig. 7: Vibration intensity diagram [DIN ISO 13373-3]
X
Effective acceleration value (total value of 10 Hz to 10 kHz) in m/s²
Y
highest peak acceleration value in m/s²
1
range 1 = very low value
2
range 2 = normal (normal status)
3
range 3 = warning message
4
range 4 = alarm
This vibration intensity diagram is not recommended for machines powered by
a gear unit or machines for which there is usually heavy background noise.
The vibration monitoring continually determines the bearing status parameter. The bearing
status parameter is scaled based on the vibration intensity diagram at current output 4
–20 mA:
