Great Planes Triton2 EQ Charger - GPMM3156 - Manual (Page 13)

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b. Press the dial again to make the discharge cutoff voltage value fl ash. This is the total pack voltage where
discharge should stop (not volts per cell). Turn the dial to fi nd the proper voltage. Re-press dial to confi rm the
selection. Settings for LiPo and Li-Ion batteries are based on 3.0V per cell, and LiFe packs are based on 2.5V
per cell, as follows:
WARNING!! Do not attempt to discharge a LiPo battery below its recommended cutoff voltage. Doing
so may cause a failure later when attempting to re-charge the battery, and result in a FIRE!
4. To START DISCHARGE, press the dial for 2 seconds. The “BATTERY CHECK…” message will show briefl y, and
discharge will start automatically if the battery is in suitable condition.
5. When discharge is fi nished, the screen will show “END” and tones will sound for 10 seconds. The battery can now be
re-charged or disconnected. To see details measurements press BATT TYPE and MENU simultaneously to see the
DATA VIEW screens (see page 16).
Notes about discharging LiPo, Li-Ion and LiFe batteries:
*
For more accurate discharge readings, it’s better to use a current which can discharge the pack in 1 or 2 hours.
* For batteries having more than 6 volts the actual discharge current might automatically be limited by the charger’s maximum power rating. See
the included MAXIMUM POWER CHART for details.
* Discharge can be stopped manually by pressing MENU, or disconnecting the pack.
CARE AND HANDLING FOR LEAD-ACID (Pb) BATTERIES
Never attempt to care for lead-acid (Pb) batteries in the same way as other battery types! Lead-acid batteries
commonly used in R/C hobby fi eld boxes require unique care and handling methods as they contain different characteristics
than other battery types.
• Do not attempt to use the NiCd, NiMH, or lithium functions on Pb batteries.
• Do not exceed 14.7V maximum charge voltage for batteries rated at 12V.
•
Pb batteries have a self-discharge rate of 5-10%, meaning they hold charge well. There is no need to trickle charge
Pb batteries. No cycling of Pb batteries is needed.
• Do not leave Pb batteries in the full discharge condition, which could cause the battery to lose its ability to regain full charge.
CHARGING LEAD-ACID (Pb) BATTERIES
1. Press BATT TYPE to fi nd the “Pb CHARGE” screen.
2. Two values can be adjusted on the Pb charge screen:
a. Press the dial to cause the charge current value to fl ash, and turn the dial to fi nd the desired setting. For 12V
7Ah (7000mAh) lead-acid fi eld batteries, a slow charge current value of (C÷10) is recommended, which would
be “0.7A” (7000 ÷ 10 = 700mA). A faster charge current value of (C÷3) can be used, which would be (7000 ÷ 3 =
2333mA) “2.3A”.
b. Press the dial again to make the battery voltage fl ash. This is the nominal rated voltage of the entire battery.
Set this voltage to the voltage printed on your battery. Most hobby fi eld batteries have a nominal rated voltage
of 12.0V. Turn the dial to fi nd the proper voltage. Re-press dial to confi rm the selection.
3. To START CHARGE, press the dial for 2 seconds. “BATTERY CHECK” will show briefl y, and charge will begin
automatically if the battery is in suitable condition.
LiPo and Li-Ion Packs
pack size
1S
2S
3S
4S
5S
6S
cutoff voltage
3.0V
6.0V
9.0V
12.0V
15.0V
18.0V
LiFe Packs
pack size
1S
2S
3S
4S
5S
6S
cutoff voltage
2.5V
5.0V
7.5V
10.0V
12.5V
15.0V