APPENDIX C
pg. 45
1212 & 1212P Manual - Sep 2019
APPENDIX C
BATTERY DISCHARGE INDICATOR (BDI) SETUP
The Battery Discharge Indicator used with the 1212/1212P is quite flexible and, once set up, will
provide the user with reliable information on the status of the battery system.
The BDI parameters (Program » BDI menu) must be set up specifically for the type and size of the
charger, the battery size, and the vehicle’s expected drive cycle.
When setting up the BDI parameters, use the same vehicle and set of batteries for the entire
procedure. Do not drive the vehicle or charge the batteries except when requested to do so in the
procedure.
Follow the steps in the order they are presented.
Before beginning the procedure, set the following initial values:
Full Voltage
= 24.4
Empty Voltage
= 20.8
Full Charge Voltage
= 28.2
Start Charge Voltage
= 25.2
Reset Voltage
= 25.0
Discharge Factor =
2.0
Charge Factor
=
2.0
Low BDI Level = 0
Low BDI Max Speed
=
50.
Step 1 — Setting the Reset Voltage
a. Plug in the charger, and fully charge the batteries. With the charger still attached and running,
measure the final battery voltage with a Digital Volt Meter (DVM).
b. Set the Full Charge Voltage 0.2 V lower than the measured value.
c. Turn off or disconnect the charger and let the batteries sit for 1 hour. Measure the battery voltage
again.
d. Set the Reset Voltage 0.2 V lower than the new measured value.
Step 2 — Setting the Full Voltage
a. Select a medium speed mode and drive the vehicle for 10–15 minutes.
b. After this time and while driving straight on a level surface, record the battery voltage displayed
in the 1311’s Monitor menu.
c. Set the Full Voltage parameter to this value.