13
14.0 OPTIMUM MEASUREMENT CONDITIONS
Perform measurements with the machine operating under normal
conditions. For example, when the rotor, housing, and main bearings
have reached their normal steady operating temperatures and with the
machine running under its normal rated condition (for example, at rated
voltage, flow, pressure and load). On machines with varying speeds or
loads, perform measurements at all extreme rating conditions in addition
to selected conditions within these limits. The maximum measured value
represents the vibration severity.
Stinger‑Mounted
Vibration Sensor
Magnetically‑Mounted
Vibration Sensor
Load Zone
15.0 EVALUATING THE OVERALL VIBRATION MEASUREMENTS
Three general principles are commonly used to evaluate your vibration
measurement values:
ISO 10816 Standard Comparison:
compare values to the limits established
in the ISO 10816 Standard.
.
Trend Comparison:
compare current values with values of Baseline for the
same Points over a period of time.
Comparison with Other Machinery:
measure several machines of a
similar type under the same conditions and judge the results by mutual
comparison.
If possible, you should use all three comparisons to evaluate your
machinery’s condition. ISO 10816 and trend comparisons should always
be used.
