MULTIFUNCTION WATT METER
POWER
LOAD
POWER
SOURCE
(MAX.DC60V)
Balance
Temp.
Thank you for purchasing Libra-METER. Please read this entire operating manual completely and attentively as it contains important information and safety
notes, therefore you need to keep this manual in a safe place, and be sure to pass it on to the new owner if you ever dispose of Libra-METER.
Special features
Libra-METER is a very sophisticated electronic device that controlled by high performance microprocessor and precise resistors. It has three functions of
‘watt-meter’, ‘battery checker’ and ‘self-balancer’. Those functions are essential for electric flyers to ensure safe battery condition and to measure the
electric consumptions of the power system. And also, the built-in self-balancer can equalize the individual voltages instantly.
Libra-METER can handle all types of Lithium batteries (LiPo, LiIo, LiFe) consisting of series-wired cells, but the battery pack has to have a balancing plug
for checking voltage.
-Watt-meter program
The Watt-meter circuit can measure the electric current up to 100A. You can verify the electric consumptions on your power system.
-Battery checker
Libra-METER can show you the voltage and residual capacity of your Lithium battery pack with its individual voltage of each cells.
-Integrated self-balancer
Libra-METER has an integrated self-balancing circuit which is self-operative without linking to charger. When you connect the battery pack to the individual
port of the device the balancing job will be started instantly. In this case the individual cell voltage will be equalized to the lowest cell voltage of the battery
pack.
Specifications
Input power: Max. 60.0V (both on watt-meter and battery checker)
Max. current: 100A (watt-meter)
Min. operating voltage: 6.6V
Current consumption: 20mA at battery checker program
Dimension: 105×57×20mm
Weight: 80g
Basic operation
Libra-METER is activated when the battery is connected to the unit. For the battery checker function, connect the battery pack to the individual port via a
suitable adaptor board, or connect the battery to the cable of ‘Power source’ for watt-meter.
Battery checker program
This feature can be used to check the residual battery capacity and the voltage of individual cells.
-. Select the program by pressing ‘SELECT’ button to suit the type of battery which is being measured.
-. And press ‘ENTER’ to go to the next screen.
-. There are two programs which are voltage-checking and self-balancing. Select ‘LiPo Check’ program using ‘SELECT’ button and press ‘ENTER’.
It shows the type of battery and number of cell-count at upper right, and output voltage. At lower line, it displays
the residual capacity at percentage and visual graph.
The individual voltages are shown from the first cell at upper right.
If the voltages are out of balance, it warns and shows the voltage difference from the highest to lowest one.
You need to let them balance, or check the cells and cables carefully.
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You may use TP/FP, EH, HP/PQ ,JST-XH adapters, so as to detect the relevant battery.
Self-balancing progr am
This program can equalize the individual voltages to their lowest one.
-. Select the matched type of Lithium battery using ‘SELECT’ button.
-. And press ’ENTER’ to start balancing.
As the balancing job goes on, you can see the individual voltage by pressing ‘ENTER’ button. When the balancing job is
completed, the beep sounds 20 times.
(You can set the beep sound ‘OFF’ by pressing ‘SELECT’ button for more than three seconds. Or you can set it ‘ON’ by
doing the job again. The default is ‘ON’.)
Watt meter program
The measurement screen continuously displays Amps,Volts and Watts. All other
measured values are presented sequentially, every two seconds, in the “Data-Queue”
position of the display. Data values are identified by their units (Ah, Wh, Ap, Vm, Wp).
All measurement screen values are updated every 0.4 seconds.
-. Select the ‘Watt’ program by pressing ‘SELECT’ button.
-. And press ‘ENTER’ to start to measure.
ESC
SELECT ENTER
To protect the battery from the over-discharge, there are
minimum voltage to be balanced for each type of Lithium
batteries. If any individual voltage is lower than the limit, there
shows an error message. LiPo/LiIo: 3.0V, LiFe: 2.0V.
Beware of rotating propeller, when you check the motor with
propeller. For maximum safety, hold the motor on a test bench
tightly, and wear a safety eye protection and hand gloves.
