X20 system modules • Other functions • X20CM4810
2104
X20 system User's Manual 3.10
ISO10816
The RMS value from the raw signal of the oscillation velocity in a frequency range from 10 Hz to 1 kHz according
to ISO 10816.
This broad characteristic value is often used in the assessment of the machine condition since assessment limits are
specified for this characteristic value in the standard. These depend on the type of machine and type of installation
(rigid or non-rigid). The characteristic value limits for a pre-warning or a warning are given according to their defined
classification.
Danger of damage to machine
Not fully operational
Continuous operation with no restrictions
Newly installed machine
Hard
Soft
Hard
Soft
Medium-sized machine
15 kW < P < 300 kW
Large machine
300 kW < P < 50 MW
Motors
160 mm < H < 315 mm
Motors
315 mm < H
Group 2
Group 1
mm/s rms
1100
710
450
350
280
230
140
070
10
- 1
00
00
H
z r
>
60
0 m
in
-1
(2
- 1
00
0 H
z r
>
12
00
m
in
-1
)
Vib
ra
tio
n a
cce
ler
atio
n
Machine base
Machine type?
Group
Figure 675: DIN assessment scheme
If the machine condition is in order, this characteristic value is low. If damage occurs, then this value increases
severely. If the RMS is assessed in the range of the oscillation velocity, lower frequency portions such as drive
speed (and associated imbalance and/or misalignment) that are emphasized more and reflected more heavily in
the characteristic value.
Example:
Wave imbalance
RmsAccEnvelope
The RMS value formed from the envelope signal of the oscillation acceleration from the configured minimum fre-
quency ("MinFrequencyEnvelope01") to the maximum frequency ("MaxFrequencyEnvelope01") of the channel.
Example:
Impact of components on fans
RmsAccRaw
The RMS value formed from the raw signal of the oscillation acceleration from the configured minimum frequency
("MinFrequencyRaw01") to the maximum frequency ("MaxFrequencyRaw01") of the respective channel.
Example:
Loose components in pumps
RmsHighFrequency
The RMS value formed from the high-frequency portions of the input signal of the oscillation acceleration in the
frequency range between "HighFrequencyConfig01" (500 Hz – 2 kHz) and 10 kHz.
Example:
Early-stage bearing damage to electric motors
RmsRaw
The RMS formed from the raw signal of the oscillation acceleration up until the configured maximum frequency
("MaxFrequencyRaw01") of the respective channel.
Example:
Loose components in pumps
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