ACES SYSTEMS Cobra II, Руководство пользователя

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Gen II
User Manual
10-6 – Fan/Turbine Balance Chapter 10 Revision 2.10, Apr 2020
10.1.1.10. 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.
10.1.1.11. Move to the “ Num Baln Speeds ” field using the [

] key. Use the [

] key to
select the number of actual speeds (1 to 9) or Sel. In Job. The “Sel in Job”
selection in this field will allow you to choose the number of balance speeds as
well as the actual speeds themselves in the job. If you always use the same
number of speeds and the same speeds to balance this engine, you should select
that number of balance speeds here. If the number of speeds can vary with each
job using this setup, select the option of “Sel in Job”.
10.1.1.12. 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.
10.1.1.13. 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.
10.1.1.14. 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. If this value is off, the Analyzer speed indications may not
match the cockpit display.
10.1.1.15. 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 applicable
Maintenance Manual if you are not familiar with the vibe unit used for this
application.
10.1.1.16. Using the [

] key, move to the “ Modifier ” field. Using the [

] key, select the
modifier used for this balance setup. Refer to the applicable Maintenance Manual
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