Gen II User Manual
9-6 – Transient Balance Chapter 9 Revision 2.10, Apr 2020
9.1.1.11. Use the [] key to move to the “Baln Weight Unit:” field. Use the [] key to select
“g” for grams or “oz” for ounces. You will use this unit of measurement to define
your class weight set. If using Actual Weights, this defines the units of measure in
which the balance solution will be presented.
9.1.1.12. Move to the “Num Sens / Eng:” field using the [] key. Select the number of sensors
you will use on each engine by using the [] key to scroll between the selections.
This selection will define total number of sensors being used on each engine for the
balance job.
9.1.1.13. Move to the “Slow Roll RPM” field by using the [] key and use the numeric keys to
enter a Slow Roll RPM for this balance job. If no entry is required, leave this field at
0. A Slow Roll RPM may be required when using proximity probes. With these
probes you may encounter a phenomenon known as runout. Runout occurs as a result
of the physical properties of some shafts. The Slow Roll RPM is used to identify what
the actual signal is, and then these measured values are subtracted from all subsequent
vibration measurements.
9.1.1.14. Move to the “Min Baln RPM:” (minimum balancing speed) field by using the []
key. Enter the minimum speed, in RPM, that may be used for this balance setup. The
value entered here must be equal to or greater than 20% of the value entered in the
“Actual RPM @ 100%” field (Para 9.1.1.15 below). If the entered value is less than
20% and you press [OK], an error message will appear providing the minimum value
required.
9.1.1.15. Move to the “Actual RPM @ 100%” field by using the [] key. Use the numeric
keypad to enter the actual RPM of the fan or turbine being balanced at 100% of its
allowable speed.
9.1.1.16. Move to the “Vibe Unit:” field by using the [] key. Using the [] key, select the
engineering units used for this balance setup. Refer to the LMM if you are not
familiar with the vibe unit used for this application.
9.1.1.17. Move to the “Modifier:” field by using the [] key. Using the [] key, select the
modifier used for this balance setup. Refer to the LMM for verification of required
engineering units and modifier to be used for this application. The Vib (engineering)
Unit and Modifier are used in conjunction with one another to express a value as in
“mils Pk-Pk”, or “IPS Peak”. Refer to the LMM if you are not familiar with the
modifier used for this application.
9.1.1.18. When all fields are completed as required, press [OK] to proceed.
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