Thrush Aircraft S2R–T660 Maintenance Manual page 213

G. With floating ball against the top stop of the sending unit; adjust the potentiometer until pointer is
aligned with 360 mark on gauge.
F. Once steps 3 and 5 are completed, the unit is in calibration.
G. Also provided are two hopper-level warning lights -- one amber and one red. They both have a push-
to-test feature and a dimming capability. The lights are adjusted to come on at any position (hopper
level) that you may desire by potentiometers located under pop-off caps on the face of the analog
control unit Type FA-A. The amber light is adjusted to come on by adjusting Pot 1 labeled set point 1,
and the red light is adjusted to come on by adjusting Pot 2 labeled set point 2.
H. The amber and red lights can be set at any position you may desire. Thrush Aircraft Inc recommends
setting the amber light to come on at 25 gallons, or 8 3/8" from top of lower stop collar to bottom of
floating ball, and the red light to come on at 6 1/2 gallons, or 2 1/2" from top of lower stop collar to
bottom of floating ball.
8 – 9
THRUSH AIRCRAFT INC - T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL
Unit must be on to adjust 360 side of gauge.
* NOTE *
The small % scale on analog control unit Type FA-A will
move in direct relationship with the remote gauge.
* NOTE *
Hopper loads above 360 gallons are un-gaugeable.
* NOTE *
Effective: 12/17/03