Gen II User Manual
10-21 – Fan/Turbine Balance Chapter 10 Revision 2.10, Apr 2020
procedures and allow the engine to warm up to normal operating temperatures.
When warm up is complete, allow the engine to stabilize at speed, make any
minor adjustments as necessary, and then press [OK] to continue. Use the [F3]
“+/- Pol.” key to reverse the polarity of the Tach Signal. If the Current RPM is
erratic at a stable engine speed, press this key in an attempt to stabilize the
reading. This option may be necessary when either of the Tooth settings, “Mod
Tth” or “Adj Tth”, are selected on some engines.
10.1.11.2. The analyzer will display the “Set Engine Speed” screen. Use the on-screen
indications of engine RPM and Percent to set the current RPM to match the
desired RPM. When the desired RPM is reached press the [OK] key to progress
to the next screen. The Set Engine Speed screen will be repeated as many times
as the number of balance speeds selected in paragraph 10.1.1.11 above.
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