BAC4812 Battery Charger User Manual
BAC4812 Battery Charger
Version 1.0
2016-06-24
Page 7 of 8
5. SETTING
5.1. VOLTAGE REGULATION
When regulating current on the scene, it needs to disconnect battery and charger and measure charger
output voltage while measuring voltage potentiometer until suitable value.
5.2. CURRENT REGULATION
Output connects to battery. Measure charging current when charging voltage isn’t higher than 12.5V and
set suitable value by regulating current potentiometer (AMP). It also can estimate current value
according to current potentiometer scale.
6. OPERATION
1)Connect terminals IN+ and IN- to direct voltage 48V using BVR 1mm
2
multi-strand copper line.
2)C12V and 0V to battery positive and negative using BVR 1.5mm
2
multi-strand copper line.
3)Terminal 0V and -12V output regularly -12V. Max. output current: 200mA.
4)POWER
：
power supply indicator, illuminated when the charger is operating normally.
5)CHARGING
：
charging indicator, illuminated when charging current exceeds 0.5A.
6)VOLTS
：
charging voltage regulator potentiometer
7)AMP
：
charging current regulator potentiometer
8)FUSE
：
output fuse; rated current:5A; fuse will blow out when output connection reversed(no output
voltage). It will work normally once correct connection and replace the fuse.
9)Replacing fuse operation sequence:
a) Press inward using straight screwdriver with less strength while screw one time anticlockwise
and then take it out.
b) Place new fuse and slip into fuse holder. Press strongly inward with straight screwdriver while
screw one time clockwise.
Note:
Unsuitable operation or overexertion may make the fuse holder damaged.
Note:
1) Because there is diode and current-limiting circuit inner the charger, it can be used together with
charging generator, and there is no need to disconnect the charger when cranking.
2) During genset is running, high current will cause voltage drop in charging line, so recommend
separately connecting to battery terminal to avoid disturbance on sampling precision.
