Spektrum DX3R User Manual page 20

EN
• Using the 2mm screws, attach the sensor to the mount
as shown.
• 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.
20
Hint: We recommend applying a small
amount of CA glue around the edges of the decal
to ensure strong adhesion. Only glue the edges
and do not cover the top of the decal.
• Plug the sensor into the RPM port in your receiver.
rPm/sPeed sensor (eleCTrIC) (sPm1503)
In electric cars and trucks, the rpm sensor is mounted
near the spur gear and gets rpm readings directly from
that gear. You can program a conversion in the transmitter
to give speed in mph or rpm. See the Telemetry Speed
Unit section on rpm and speed for more details. A mount
is available that allows the rpm sensor to be mounted
in many applications. Because of the diverse types of
electric vehicles, you may need 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. You can tape a mount in place using
servo tape then bend it to allow installation in most
applications.
• Mount the rpm sensor so 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 your receiver.
TemPeraTure sensor (nITro) (sPm1450)
A temperature sensor loop is available 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.
Temperature Sensor Installation (Nitro)
• Install the loop as shown around the cylinder of the
engine. It is best to place the sensor near the point
SPEKTRUM DX3R PRO USER GUIDE