Page 5 - 810 Trianing Book Extract

How to incorporate a tester into your maintenance program

Here’s what happens if we take the machines in a typical plant and put them into a pyramid as shown in Figure 4:

• The few complex machines at the top level of the machine pyramid have many variables and require a vibration
expert to compare, trend, analyze and diagnose, the machine. The expert relies on years of training and expe-

rience to learn how to evaluate variables. On the upper right of igure 4, see how complex the waterfall trends
and manual data analysis looks.

• Most of the remaining machines in the plant (more than 90 %) are mainstream machines—motors, pumps, fans,
compressors and blowers that can effectively be diagnosed using automated diagnostic programs. The vibration

tester (on the middle level) uses a database of real-world patterns developed over 30 years of analyzing real
machines. On the center right side of igure 4, see that an automated diagnostic tester provides machine faults
and severity, along with a repair recommendation.

• At the bottom level of the pyramid, the small and expendable machines that would typically be ignored can

now be screened by trending overall vibration levels and using built-in machine health severity scales to indi-
cate when it’s time to call in more advanced tools. On the bottom right side of igure 4 see the trend of the data
from the vibration meter.

Rotating Recommended
equipment in vibration Data
a typical plant
Equipment types
testing device
generated

Manual data al
Vibration analyzer
analysis
ic
• Complex system • Turbine generators % crit
• Reliability team • Diesel generators 10n
• Data collector
• Paper machines
p