Eagle Altimeter V3 User Manual

Instruction Manual for the Altimeter MicroSensor V3

Document Version 1.6

Thank you for your purchase! This instruction manual will guide you through the installation and operation of your Altimeter MicroSensor
V3 (the Altimeter). Please read the entire manual carefully before proceeding. If, after you read the manual, you have further questions
or problems, see the Support page on http://www.eagletreesystems.com for additional information, or email us at

[e-mail]. Please visit our support web page for the full color, electronic version of this manual which may be

updated if changes were made after printing, or if you want to view the manual on your computer.

What the Altimeter Does

The Altimeter is a precision instrument that uses barometric pressure to measure altitude, just as full sized planes do. Advanced
temperature compensation and calibration ensure the best possible accuracy. When used standalone, the Altimeter displays your maximum
altitude on the built-in 7 segment LED display. The maximum altitude continues to be updated and displayed on the LED, until you turn
power off and on the MicroSensor. When power is turned off and on, the maximum altitude from the last flight is displayed, and now the
MicroSensor is ready to record your next maximum altitude (even if it is lower than the previous maximum altitude).

Additionally, the Altimeter can be connected to your eLogger (any version) to provide altitude data for your entire flight, and can even be
used in your own microcontroller/firmware project. When connected to the eLogger, altitude can be displayed and graphed using the
eLogger’s Windows software.

IMPORTANT: The Altimeter Microsensor is intended for use exclusively in model planes, boats and cars. Other uses are not supported. It
is extremely unlikely that the installation of the Altimeter will affect your model’s radio range or control. But, as always after making an
electronics change to your model, it is very important that you range and function test your model once the Altimeter is installed to ensure
that there is no impact on your system.

Packing List

Your package should include the following: The Altimeter, the Standalone Cable, and a printed version of this manual.

Installing the Altimeter in your Model

The Altimeter can be mounted anywhere in the model. If you wish to read the LED without removing the wing, a small rectangular hole
can be cut at the mounting location of the circuit board, and the board mounted with tape or Velcro, so that the LED is visible at all times.
If your model does not have lots of turbulence or pressure variation inside the fuselage, no additional mounting steps are needed.

If the model has a “ram” air intake for cooling, or travels at high speeds, a small hole (approximately 2 mm diameter) can be created in the
side of the model’s airframe (fuselage), to create a static port. The hole should be placed in an area of the airframe that is perpendicular to
the direction of travel (approximately where the cockpit door would be on a full sized plane). The altimeter’s sensor port can then be
connected to that hole, using a small piece of silicon tubing, so that the edge of the tubing is flush with the outside skin of the fuselage.

Alternatively, if you are using our Airspeed MicroSensor V3, the static line of the Airspeed MicroSensor can be shared with the altimeter,
using a small plastic “T” fitting.

Using the Altimeter in Standalone Mode

Powering the Altimeter in Standalone Mode

For standalone mode (not connected to an eLogger), connect the
Standalone Cable to the gold pins of the Altimeter, as shown in Figure 1.
The polarity of the connection is as follows:
RED = Positive (Vdd)
BLACK = Negative (ground)

Note that the RED wire of the standalone cable corresponds with the red
dot on the label.

Copyright © 2008 Eagle Tree Systems, LLC
http://www.eagletreesystems.com

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2

The JR/Universal servo end of the Standalone Cable connects to a spare Receiver channel or small battery. Note that the voltage must be
between 3V and 16V. Do not exceed 16V!

IMPORTANT: Ensure that you connect the Standalone Cable with the correct polarity, or the Altimeter could be damaged,
voiding the warranty!

Note that in Standalone Mode, the 4 wire cable built into the Altimeter must NOT be connected to anything!

Configuring Metric vs English Units in Standalone Mode

When powered on, the LED readout will briefly display “0” if the unit is configured for English (Feet), or will display a “1” if configured for
metric (Meters). The factory default configuration is Feet.

To switch between English and metric units, connect the Standalone Cable
as described above, but don’t power the Altimeter. Then, connect a small
piece of wire between the unconnected pins of the Standalone Cable’s 4 pin
connector, corresponding to the brown and yellow dots on the label, as
shown in Figure 3. This creates a jumper between the brown and yellow
labeled pins.

Then, power the Altimeter via the Standalone Cable. A “0” will then flash
a few times to indicate that English units are configured, or a “1” will flash
if Metric units are configured. If the wrong units are configured, just
disconnect the power from the Altimeter and reconnect it.

Once the desired units are configured, disconnect from power and remove the wire jumper. Then, when reconnected to power, the desired
units should be displayed briefly (“0” or “1”).

Reading Altitude in Standalone Mode

When the Altimeter is powered on, after the Units setting is displayed (“0” or “1”), the highest altitude attained during your last flight is
repeatedly displayed, one digit at a time, on the LED. For example, if the highest altitude attained was 320 Feet, “3 – 2 – 0” will flash
repeatedly on the LED, with a pause (blank LED) after the altitude is completely displayed, but before it is displayed again.

To reset the max trigger, just turn power off and on to the MicroSensor. Then, after landing from your next flight, the highest altitude
attained during that flight is displayed automatically, overwriting the highest altitude from your prior flight (even if the new highest altitude
is less than the prior flight’s highes altitude). Note that an altitude of at least 60 Feet (18 Meters) must be attained, before a new

highest altitude is displayed.

The highest altitude of your last flight is automatically saved, so that when you turn the unit back on, that altitude is displayed.

For example, if you fly and reach a max altitude of 100 Feet, when you land “1 – 0 – 0” will be displayed. Then, when you turn power off
and on, “1 – 0 – 0” will again be displayed. If you then fly again and reach an altitude of 500 Feet, “5 – 0 - 0” will be displayed when you
land.

Using the Altimeter with your eLogger

Windows Application and Firmware Update

To use the Altimeter, you must update to Eagle Tree Windows Application version 6.77 or higher. To update, download the latest
application from the support page of our website, located at http://eagletreesystems.com/Support/apps.htm . After downloading and
installing the Application, the firmware of your MicroPower eLogger will need to be updated. To upgrade your firmware, just choose
“Tools, Firmware Control” and click the Update button.

Copyright © 2008 Eagle Tree Systems, LLC
http://www.eagletreesystems.com