1
Esprit Tech
(1) 321.729.4287
P.O. Box 360815
Firmware Version: 1.03
Support
@
EspritTech.com
Melbourne, FL
https://
www
.espritTech.com
32936, USA
U
SER
M
ANUAL
The Altitude Motor Switch (AMS) is a versatile device suitable for several competition categories where the
altitude or motor run time shall be limited. It can be used also as a standalone telemetric variometer. The
sensor is usually connected between the receiver throttle channel and the appropriate signal input of the
electronic speed controller.
The AMS contains a sensitive barometric altimeter/variometer which uses the latest MEMS technology to
achieve a high level of accuracy, while preserving miniature dimensions. The sensor is able to detect tiny
changes in atmospheric pressure to indicate the change of altitude with resolution 0.1m. Using the integrated
high power cables you can directly power the receiver and servos through the AMS from a BEC circuit of the
speed controller.
F
EATURES
-
Small dimensions. Possibility to power the receiver and servos through the AMS.
-
Accurate measurement of absolute/relative altitude and climb/sink rate.
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Automatic telemetry detection: Duplex EX, Graupner Hott, Multiplex MSB, Futaba S.Bus2.
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Configurable alarms on altitude and climb rate.
-
Configurable shutdown altitude.
-
Configuration through the transmitter.
-
Firmware updates.
-
Supported competition categories: FAI F5J, ALES (altitude limited electric soaring), LMR (limited motor
runtime) and all possible derivatives.
AMS
Dimensions
27x11x5mm
Weight
7g
Connection
Male/female JR 3×0,5mm
2
(3x 20AWG)
Pressure range
300÷1200hPa
Altitude resolution
0.1m
Typical variometer noise ratio
± 0.02m/s
Operating current
15mA
Operating temperature
-20 – 85°C
Supply Voltage
3.5 – 12V
Telemetry
Duplex EX, Multiplex MSB, Graupner Hott, Futaba S.Bus2
Status LED
YES
I
NSTALLATION
Connect the AMS between the receiver and the electronic speed controller. To control the motor, select the
appropriate channel on the receiver. Note that the sensor is very sensitive to changes in atmospheric pressure
and also to mechanical stress. Try to avoid any mechanical stress on the sensor. To achieve the most accurate
altitude measurement, pay attention to the placement of the sensor. The device should not be exposed to direct
airflow and any close contact with heat-emitting objects (e.g. motors or speed controllers) should be avoided.
As an additional function, the telemetry output can be used for setting or wireless data reading. Connect an
extension cable with JR connectors between the telemetry port of the receiver and the "Data" port on the
sensor.
