Eagle Tree eLogger V2 - Manual (Page 2)

Copyright © 2003-2005 Eagle Tree Systems, LLC
Page 2
5. Have fun!
Installation of the MicroPower
IMPORTANT: Never let the sensor/USB prongs of the MicroPower touch bare battery pack leads, exposed parts of your ESC/BEC, or the
motor casing!! Doing so could destroy the MicroPower since these items may have high voltage present from your battery pack, and void
the warranty.
The below instructions and diagram guide you through the installation of the MicroPower.
Connecting the MicroPower to Your Model’s Power System
WARNING: High Voltages can cause electric shock. Be extremely careful when working with high
voltage packs! Work with high voltages at your own risk.
The MicroPower is normally connected so that the connectors or leads marked “Source” are connected to your battery pack, and the connectors or
leads marked “Load” are connected to your ESC’s power input. The red wires of the “wire lead” version of the MicroPower must be connected to
the positive side of the load and source (normally the red wires). For measuring current/voltage battery charging, it is ok to reverse the Source and
Load connections, so that current is flowing “backwards” through the MicroPower. The MicroPower will still measure current correctly in this
mode!
IMPORTANT: Do not leave your model’s power system connected to the MicroPower when the unit is not in use in the field. Always
disconnect the battery from your model when it is in storage.
IMPORTANT: With the Integrated Connector version of the MicroPower, always ensure that the wiper prongs of all plugs are not bent or
damaged before connecting! A bent or damaged wiper prong could potentially collapse or fold over during connection, and contact the
other terminal of the connection, causing a short, or could
result in an unreliable connection.
Measuring Temperature with the
MicroPower
Up to two optional temperature sensors can be connected to
the MicroPower. Note that the second temperature sensor
plugs into the RPM port, so only one temperature can be
measured when RPM is being measured.
The temperature sensors are typically installed by placing the
wire loop around the your battery pack, ESC, BEC, or other
location, and cinching it in place by pulling the two rubber
stays snugly against the surface to be measured. Or, if you
have the Micro temp sensor, it can be slid under heat shrink,
taped on, or otherwise affixed.
NOTE: the secondary temperature channel has lower
resolution than the primary channel, at lower temperatures.
But, as temperature increases, the resolutions of the secondary
channel and the primary channel become very close (about 1
degree Fahrenheit).
Plug the Futaba style connector from the temperature sensor into the MicroPower as shown in Figure 1. If a
second temperature sensor is used, this sensor plugs into the RPM slot, with the same polarity as the first
temperature sensor.
Note: the Temperature Sensor lead can be easily extended with a standard servo extension cable.
Measuring RPM with the MicroPower, Using the Hall RPM Sensor with
Magnets
NOTE: see the Optical or Brushless RPM Sensor instruction manuals if you are using the those sensors.
Installing the optional Hall RPM sensor and magnets is the most challenging part of installation, but is
relatively easy once a good mounting location is determined. Refer to our website’s Flight support page at
http://www.eagletreesystems.com for pictures of example installations.