Gen II
User Manual
9-7 – Transient Balance
Chapter 9
Revision 2.10, Apr 2020
9.1.2.
– Sensor Information Screen
9.1.2.1.
In the “
Eng ID:
” (engine identification) field use the numeric keypad to enter the
number of the engine. Press the [
] key to move to the next field.
9.1.2.2.
Use the [
] to select the “
Tach Chan
” (tachometer channel) you will use for this
job. Be sure the channel you select here is the channel you actually connect the
tachometer-input signal to when setting up the equipment. Press the [
] key to move
to the next field.
9.1.2.3.
Use the [
] key to select the “
Tach Type:
” The analyzer will process the signal of
several tooth types, magnetic pickups, tachometer generators and optical sensors.
Optical sensors include the Phototach and Lasetach. The available selections are
“Optical”, “Mag P/U”, “Mod Tth”, and “Adj Tth”. If “AdjTth” is selected the
additional “Delta(%):” field will appear after Tach Pos (FLA). See paragraph 9.1.2.5
below for more on this setting. Press the [
] key to move to the next field.
9.1.2.4.
Use the [
] to select “
Tach Pos (FLA):
” (Tachometer position, from Forward
Looking Aft). This is the clock position where the tachometer triggers during the fan
rotation as viewed from forward of the engine looking aft into the intake. The
selections are in whole hours from 1 to 12. If you are unsure of the location of the
tach trigger event, use the [
] key to select “UNK”. Press the [
] key to move to the
next field.
9.1.2.5.
(Optional as described above in Para 9.1.2.3 above) Use the keypad to enter a value in
the “
Delta(%):
” field. This value will be the amount that the shifted tooth detection
is shifted. Valid entries are from 1.0% through 16% in signal shift.
