As per manufacturer's data sheets, a 12V rechargeable lead acid battery should be operated within 10.1V and 13.8V. When the battery charges higher than 13.8V it is said to be overcharged. When it discharges below 10.1V it can be deeply discharged. This can bring down the charge holding capacity of a battery by 15 to 20%.
It is therefore necessary for all concerned to monitor the charge level of their batteries continuously.
The lower reference voltage of 10.1V is ranked "0" and the upper voltage of 13.8V is ranked as "10". If the display shows 4, it means that the battery is charged to 40% of its maximum value of 13.8V.
A buzzer is wired in the circuit such that it sounds whenever there is a overcharge or deep discharged.
Test & Adjustment
To conduct a calibration, adjustable power supply and multimeter are required.
For Calibrating the lower reference voltage, follow steps given below:
1. Set the output of Power Supply source to 10.1V
2. Connect the power supply source to the circuit board
3. Now the display will show some reading. At this point vary preset VR2 until the reading on the display just changes from 1 to 0.
For Calibrating the lower reference voltage, follow steps given below:
1. Set the output of Power Supply source to 13.8V
2. Connect the power supply source to the circuit board
3. Varying preset VR1 until reading on the display just changes from 8 to 9
Calibation is completed.
Note
- You need to have a soldering skill and basic knowledge of testing
- For any inquiry or other technical problem, please contact us through Nikkoleofockxing@hotmail.co.uk
