5-8 – Main Rotor Track & Balance 5 Revision 3, Oct 2012
keypad. (Refer to Chapter 3, “Using the Model 4040 Viper” if you are unfamiliar with using
the keypad.) Follow the directions below to complete the “Main Rotor Setup” screen.
1. In the “Name” field, enter a name for the setup using the keypad. The field will accept up
to 20 alphanumeric characters.
CAUTION
Sensors connected to Channel A, Channel B, Channel C and Channel D must be of the
same type. Using different sensors during the same job will cause erroneous readings
and problems achieving good balance results.
2. Use the [⇓] key to move to the “Vertical Chan” (Channel) field. Use the [⇒] key to
“toggle” between the selections in this field, either “A”, “B”, ”C”, ”D”, “A+B”, or
“None”. The value selected for this field determines which analyzer channel will be used
to measure and display the vertical vibration.
3. Use the [⇓] key to move to the “Lateral Chan” field. Use the [⇒] key to “toggle”
between the selections in this field, either “A”, “B”, “C”, “D”, “A-B”, or “None.” The
value selected for this field determines which analyzer channel will be used to measure
and display the lateral vibration.
4. Move to the “Sensor” field using the [⇓] key. Use the [⇒] key to toggle between the
options and select a sensor. If the sensor you are using does not appear as an optional
selection, you must input a new sensor setup into the analyzer’s memory. (See Chapter 18
of the Model 4040 Analyzer User Manual, Section titled “Setup Sensors” for instructions
on how to perform this function.)
5. Move to the “Tach Type” field by pressing the [⇓] key. The selection in the “Tach Type”
field identifies which tachometer sensor you are using as a once-per-revolution source.
For main rotors, this will most often be “Mag (Hi).” Use the [⇒] key to make the
selection. The choices are “Mag (Hi)”, “Monopole”, “Tach Gen”, “Dbl Intr”, “Optical”,
and “Mag (Lo)”.
6. Press the [⇓] key to move to the “Tach Chan” field. Use the [⇒] key to select and
identify which analyzer tachometer input port you are using to acquire tachometer data.
Available channels are 1, 2, 3, or 4.
7. Press the [⇓] key to move to the “Number of Weight Positions” field. Using the [⇒] key,
select the total number of lateral balance weight positions as determined from the lateral
balance chart. The maximum number of positions equals 6.
8. Move to the “Blades” field pressing the [⇓] key. Using the [⇒] key, select the number of
blades of the main rotor system you are balancing. The maximum number of blades
equals 6.
9. Use the [⇓] key to move to the “Relative to” field. This selection will determine the
reference blade for tracking displays. Selecting “AVG” will present rotor blade positions
relative to the average of all blades. Selecting a specific blade number will present all
other blade positions relative to the blade number selected. (For more information on
tracking, refer to Chapter 16 of the Model 4040 Analyzer User Manual.)
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