TB 9-6680-287-35
(4) Holding TI in horizontal position, insert tip into hole drive of tachometer
calibrator, utilizing any adapters as required by TI.
(5) Set tachometer calibrator display select switch as necessary (1X or 2X) to
achieve desired RPM speed.
(6) Press tachometer calibrator START control and adjust SPEED control for a TI
indication of the first speed selected in (2) above.
(7) The tachometer calibrator display indication will be within the applicable
(8) Repeat (5) through (7) above for each remaining speed selected in (2) above.
If
TI does not indicate within limits specified, perform b below.
(9) Set RANGE switch on TI to HI and repeat (2) through (7) above.
b. Adjustments
(1) Adjust tachometer calibrator display for a 2500 RPM indication.
(2) Adjust low range adjustment (fig. 1) for 2500 RPM on TI (R).
(3) Set RANGE switch of TI to HI.
(4) Adjust tachometer calibrator display for a 5000 RPM indication.
(5) Adjust high range adjustment (fig. 1) for 5000 RPM on TI (R).
(6) Repeat 8 a above.
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.