Technical data are subject to change without notice.
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SPM Instrument AB • Box 504 • S-645 25 Strängnäs • Sweden
Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.se
Record keeping and measuring intervals
In manual mode, you cannot save more than one measuring result (always the last reading taken)
for each measuring technique.
For systematic condition monitoring, you have to keep records. The development of measured
values over a period of time is a much better basis for the planning of repairs and maintenance than
the result from a single reading.
If you do not have Condmaster
®
Pro, you can use an SPM follow-up form for recording shock pulse
and vibration readings.
Bearing and vibration condition should be measured at regular intervals of 1 to 3 months while
machine condition is normal.
If you see that the results from a measuring point are getting higher, you check for the causes and
also shorten the measuring intervals. It is difficult to recommend exact times, because all depends
on how important the machine is and how fast its condition deteriorates. Bearings with high but
stable shock values can last for a long time.
A slow increase of vibration severity is often a sign of wear and no cause for immediate worry.
However, especially on fans you can expect a sudden dangerous unbalance (e. g. rotor blade
breaking or shedding a layer of dirt/soot). Machines with such problems need a permanent
surveillance and often an automatic shutdown device. Read more details in the descriptions of the
monitoring methods.
Follow-up form for
condition monitoring
in manual mode
10 Manual measuring mode
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