Page 17 - 810 Trianing Book Extract

Loose sensor

If the sensor is not securely mounted during the Very high noise loor
machine test, the movement of the sensor will cause
a lot of noise (see igure 84). This high noise will be

above the baseline. This will lead to a bad diagnosis
and a false call. The diagnostic engine will see a high
noise loor and diagnose roller bearing fault. The only

solution is to retake the data and make sure the sensor
is securely mounted.

Figure 84

Overloaded sensor—hot bearing

If the sensor is mounted on a very hot bearing during Ski slope (noise loor)

the machine test, the temperature will conduct into
the sensor and create a false signature, which will
overload the electronics in the sensor. This will result

in a “ski slope” and will be above the baseline.
This will lead to bad diagnosis and a false call (see
igure 85). The diagnostic engine will see a high noise

loor and diagnose roller bearing fault. The only solu-
tion is to retake the data and let the sensor warm up

before testing the machine.

See page 151 for more advanced in-depth
information

Figure 85

3
Conirm the fault

Use the Viewer software on your PC to check that the data is valid and review the diagnostic results to make sure
that they are valid. You don’t have to be a vibration expert with the Fluke 810, simply compare the results found

in the report, with the collected data to quickly conirm the four common faults.

Here is an overview of the steps.

Step 1: review the results.

Select the View Diagnosis button, select the machine test from the menu, then review the report (see igure 86).

Does it make sense?

Extreme: 83/100 = Red

Location: Fan = Bearing 2

Fault: Imbalance = High 1X

Recommendation: Mandatory, Priority 4/4, Balance Unit

Chapter 5: Step-by-step: diagnose and review the results 115