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ISO 10816 consists of several parts, each stating measurement conditions and a table of limit values
for a defined machine type. Like ISO 2372, the evaluation of machine condition is based on the RMS
values obtained by broadband measurement over a frequency range up to 1000 Hz. Machine condi-
tion evaluation according to the ISO 10816 standard requires a correct classification of the monitored
machine. VibChecker covers ISO 10816 Parts 2, 3, and 4 > 600 RPM.
ISO 10816
ISO 10816 Part 2
In case the machine you want to monitor is a ‘large land-based steam turbine generator set in excess
of 50 MW’, part 2 is your obvious choice.
This machine class has no sub group. Instead, the choice of limit value table depends on machine speed,
either ‘1500/1800 r/min’ or ‘3000/3600 r/min’.
Selecting the appropriate speed range results in a measurement setup with the ISO recommended fre-
quency range (10 to 500 Hz), the recommended measurement quantity (vibration velocity = VEL) and
the limit values or ‘zone boundaries’.
A measurement result below the zone boundary of 5.3 mm/s RMS is acceptable and will be marked green.
Results from 5.3 mm/s to below 8,5 mm/s will be marked yellow, and 8.5 mm/s or higher will be red.
Shaft rotational speed
Condition
1500 / 1800 RPM
3000 / 3600 RPM
Zone boundary
Vibration velocity VEL
mm/s in/s
mm/s in/s
Green / Yellow
5.3
0.20
7.5
0.30
Yellow / Red
8.5
0.33
11.8
0.46
Evaluation zone boundaries based on bearing housing/pedestal vibration velocity.
Summary of Contents for VibChecker
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