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selected charge current.
After a charge cycle is complete, the total charged capacity will be displayed in the mAh
display mode even if it in the discharging stage of the cycle.
4.
Test mode:
The test mode checks the present capacity of the rechargeable battery. The
maximum capacity is determined by discharging the rechargeable battery after fully charged.
If the maximum capacity is much lower than the rated capacity then it may be near its end of
life. After the test mode is complete, the battery is returned to full capacity.
5.
Quick Test mode:
The charger will analyze the dynamic internal battery resistance by
applying a load current, and measuring the current.
This current reading is referred to the “voltage drop” detected on the battery. In about 10
seconds, the tested battery resistance will be displayed in milliohms.
A good quality battery, internal resistance is low: in the range of 20 to 80 milliohms. If the
battery internal resistance is over 500 milliohms, then it may be near its end of life. Always
use batteries with similar load resistance when used in serial to achieve maximum battery life.
Alkaline and any other 1.5v batteries can be tested on this charger. If a completely empty or
“dead” battery is tested, it is impossible to measure the load resistance.
Please note that since the internal battery resistance can be very small, and contact resistance
can be a major factor, the same battery tested in different slots or even at the same slot with
different contact conditions can result in a reading variation as much as 10% to 20%. This is
normal.
If a completely drained battery is tested, it is not possible to obtain a correct reading.
Test multiple times to assure a correct measurement result.
Due to the manufacturing tolerances, there is an approximate 30 milliohm contact resistance
from the charger itself, and this resistance is calculated together with battery internal
resistance, This 30 milliohm should be deducted from the reading to get a more accurate
battery resistance reading.
5.7
Backlight Operation
The backlight temporarily turns on if any button is pressed. After 30 seconds, the backlight will
automatically turn off.
To permanently turn on the backlight, press and hold the
DISPLAY
button for 5 seconds. To turn off
this feature, press and hold the
DISPLAY
button again for 5 seconds.
6
Overheating Protection
The BC-3000 includes comprehensive overheating protection. There are four independent
over-temperature battery sensors and two independent over-temperature control board sensors.
1.
If any battery temperature exceeds 140 degF (60 degC), the charging or discharging function
will be halted. The charging or discharging functions will resume when the battery
temperature drops below 104 degF (40 degC).