Tejera Microsystems Engineering Xtrema Quick Start

NOTE: The CD packed with your Xtrema has the full operator' s manual. The latest manual can be
downloaded by going to www.theXtrema.com. Please sign up to be notified of future updates.
PRECAUTIONS - WARNINGS - PLEASE READ ALL OF THESE!

DO NOT CHARGE Lithium Polymer / ION batteries unattended. Ever!

USE POLARIZED CONNECTORS on the motor and battery to prevent reversal of leads. Red to (+) and black
to (-) Although we have circuitry to protect the Xtrema, in certain situations serious damage to Motor, speed
controller, battery and the Xtrema may result. Make sure that your connectors can handle the maximum amps your
motor can draw. The Xtrema can safely measure 50 amps continuous and up to 100 amps for short durations when
used as a Wattmeter.

DO NOT CHARGE inside a vehicle

DO NOT CHARGE in direct sunlight

DO NOT CHARGE when ambient temperature is very HIGH or LOW.

DO NOT CHARGE when Li battery pack is hot or near flames

DO NOT USE an Automobile battery charger for the input power source. Use a regulated 12 to 13.8V DC supply
or a 12 Volt Lead Acid battery capable of providing up to 20 amps when charging at the maximum charge
capacity. Your supply must maintain a minimum of 10.5V to a max of 15V to operate.

DO NOT CONNECT EXTERNAL EQUIPMENT WITH COMMON GROUNDS. All three (-) Negative wires on the
Xtrema are at slightly different potentials.

Xtrema CASE may get HOT when charging at high current.

GENERAL OPERATION

 Up  or down  buttons on the joystick select menu or value options
Left  goes back to previous selection , right  button accepts option and goes to next step
You will need to carefully solder a matching connector to the bare wires labeled BATTERY and MOTOR on the Xtrema.

CHARGING a Lithium (Li) Battery

Connect the Xtrema to charge a battery
1
Connect the red (+) and black (-) Xtrema inputs directly to a 12Volt automobile battery or regulated power supply.
Be careful to observe polarity.
Connect the Li Po battery to the connector labeled " BATTERY" . CAUTION: Insure that there is nothing
2
connected to the " MOTOR" connector because the battery voltage will be present there.
3
You may now optionally connect up to two separate safety options. The Xtrema includes a temperature probe
that may be connected to your battery using the provided hook and loop strap. We recommend always using the
temperature probe for maximum safety during charge.
Beginning with version 1.3.0 and up we also have an optional cell balancing system consisting of up to two
Balance Interface Modules and up to four Xtrema Balancers that connect to the balancing plug(s) on your
battery. For your safety, please read the full manual available on the included CD with you Xtrema or download
it online at www.theXtrema.com for complete instructions on how to connect and use the balancer(s).
Set to Li Charge mode
" Li Charger" should be selected on the display. (If not push the up  or down  buttons on the joystick until it is
4
selected.) Press the joystick to the right  to enter Li Charger mode.
Select the cell count and milliamp
5
You will see four battery pack configurations that can be customized and remembered by the Xtrema. These can
represent four of your most common pack configuration. Use the up  or down  buttons on the joystick to pick
Xtrema
Instructions
QUICK START
(V1.0.0 – 1.3.x) (rev 2/8/2008)