Spektrum DX3S User Manual page 24

• Install the mount under the engine screw and adjust
the sensor so it is 1/8" from the flywheel. Depending
on your flywheel size, the sensor might have to be
mounted in different orientations.
• If the flywheel is reflective (bare metal), place a flat
black decal on the flywheel so it passes between the
sensor and the flywheel when rotated. If the flywheel
is non-reflective, place a reflective decal on the
flywheel so that it passes between the sensor and the
flywheel when rotated.
Hint: We recommend applying a small
amount of CA glue around the edges of the
decal to ensure strong adhesion. Be sure to
only glue the edges and do not cover the top
of the decal.
• Plug the sensor into the RPM port in SR3300T
receiver.
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rpM/speed sensor (eleCTrIC)
In electric cars and trucks, the rpm sensor is mounted
near the spur gear and gets rpm readings directly
from that gear. A conversion in the transmitter can be
programmed to give speed in mph or rpm. See the
Telemetry Speed Unit section on rpm and speed for
more details. A mount is provided that allows the rpm
sensor to be conveniently mounted in many applications.
Because of the diverse types of electric vehicles, it may
be necessary to fabricate a mount from polycarbonate
material for some types of vehicles.
RPM/Speed Sensor Installation (Electric)
• Determine the best method to mount the sensor near
the spur gear. The face of the sensor must face the
side of the gear. A mount is provided that can be
taped in place using servo tape then bent to allow
installation in most applications.
• Mount the rpm sensor such that the sensor is 1/8"
from the side of the gear.
• If the gear is non-reflective, place a reflective decal
on the gear so it passes between the sensor and the
flywheel when rotated. If the gear is reflective, place
a flat black decal on the gear so it passes between
the sensor and the gear when rotated.
• Plug the sensor into the RPM port in the SR3300T
receiver.
TeMperaTure sensor (nITro)
A temperature sensor loop is provided in the nitro system
that wraps around the head of the engine to monitor
head temperature. This is useful in tuning engines and in
preventing damaging over-lean runs.
SPEKTRUM DX3S USER GUIDE