Great Planes Triton2 EQ Charger - GPMM3156 - Manual (Page 15)

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To use this function, set a safety time in minutes which ranges from 1 to 990 minutes. See the “Safety Timer Calculations”
section here for how to calculate a safety time limit. If the battery repeatedly does not seem to reach full charge, it may be
necessary to lengthen the safety timer so the battery can reach full charge properly. Note: This function can be disabled
for slow charging of NiCd or NiMH batteries by selecting “No time limit”.
Safety Timer Calculations
For NiCd and NiMH batteries, divide the battery’s rated capacity (mAh) by the fast charge current setting (A). Take that result, and DIVIDE BY 11.1.
Set this number of minutes in the safety timer screen. If the charger stops charge at this time limit, approximately 150% of the battery’s rated capacity
will have been delivered to the battery. For example:
NiCd/MH battery Fast charge Safety timer
rated capacity current setting calculated setting
1500mAh 2.5A ((1500 ч 2.5) ч 11.1) = 54 minutes
3800mAh 2.3A ((3800 ч 2.3) ч 11.1) = 149 minutes
1000mAh 0.9A ((1000 ч 0.9) ч 11.1) = 100 minutes
For LiPo, Li-Ion, LiFe, and Pb batteries, divide the battery’s rated capacity (mAh) by the fast charge current setting (A). Take that result, and DIVIDE
BY 15.1. Set this number of minutes in the safety timer screen. If the charger stops charge at this time limit, approximately 110% of the battery’s
rated capacity will have been delivered to the battery. For example:
LiPo battery’s Fast charge Safety timer
rated capacity current setting calculated setting
2100mAh 1.8A (2100 ч1.8) ч 15.1) = 77 minutes
900mAh 0.6A (900 ч 0.6) ч 15.1) = 99 minutes
3200mAh 3.0A (3200 ч 3.0) ч 15.1) = 70 minutes
Temperature Scale: When using the optional Thermal Probe and Temperature Cut-off function (see below), battery
temperatures can be measured and displayed in degrees Fahrenheit (°F) or Celsius (°C). To change the setting, press
then turn the dial. Press the dial again to confi rm the setting.
Temperature Cut-off: This optional safety feature is highly recommended when using lithium based batteries! No
battery of any type should ever get hot when connected to the charger. A Triton Thermal Probe is required (optional, part
number GPMM3151). Do not connect a thermal probe to the charger if temperature monitoring will not be used.
Set the maximum temperature the battery should be allowed to reach during charge, discharge, or cycle. A maximum
setting of 100°F [37°C] is recommended for LiPo and Li-Ion batteries. Connect the probe to the charger (see page 4) and
the battery before starting a charge, discharge, or cycle. If the battery reaches the set temperature, charge, discharge,
or cycle will automatically stop and the “Batt.T too high” error will show.
The following features apply to NiCd and NiMH batteries only:
Peak Delay at Start: The voltage of NiCd and NiMH batteries can be unstable during the very early stages of charge.
This could cause the peak detection circuitry to accidentally stop charge too soon, and the battery will NOT likely
become fully charged. This function will temporarily turn off the peak detection circuit only during the fi rst few minutes of
charge to prevent this from happening. Select the number of minutes for this delay to last. A 3 to 5 minute delay is usually
enough. Setting a delay time of 0 minutes turns this function off.
Delay Between Charge / Discharge: This is a time delay designed to allow a battery to cool between the charge and
discharge portions of a cycle. Select from 1 to 60 minutes. Warmer batteries will require this delay time to be longer for
adequate cooling.
Peak Sensitivity: When peak charging NiCd/MH batteries, the charger should see the battery’s voltage increase to a peak
– and then actually decrease very slightly. Fast charge should stop at that time. This setting allows you to customize how
accurately the charger tries to detect peak, and is set in milli-volts per cell in the pack. A higher mV number can result in
less precise peak detections. A lower mV number can result in more precise peak detections (but settings under 5mV can
sometimes result in erratic operation depending on the quality of the input power source, input and output connections,
battery, etc.). Recommended settings are 8-10mV for NiCd batteries, and 5-8mV for NiMH batteries.
The following features apply only to NiMH batteries:
NiMH Max. Charge Input: This is another backup safety feature to protect NiMH packs. IF peak voltage is not detected
and the safety timer has not expired, this function will automatically stop charge when the amount of capacity delivered
to the battery matches the value set in this screen. Setting this screen to 110% of the battery’s rated capacity is
recommended. For a 650mAh battery, setting this screen to 715mAh would mean 110% full capacity can be delivered
(650 x 1.1). For an 1800mAh battery, a setting of 1980mAh will result in 110% full capacity (1800 x 1.1). Setting this
screen to 9900mAh will make this function ineffective for nearly most batteries.
Top-off Charge: After peak charge ends, delivering another short burst of charge can help to quickly fi ll a NiMH battery
before trickle charge starts. The amount of current shown on this screen will be delivered to the battery for only 20