Magnum Energy ME-RTR Router - Manual (Page 42)

©
2014 Magnum Energy, Inc. Page 34
Setup
Figure 3-12, CV Charge Done Time/Amps Charge Stages
* Set CV Charge Done Amps – This setting determines how long the charger will
hold the battery voltage at the CV Chg Volts setting—based on a minimum current setting
(i.e. done amps). During the Constant Voltage charge mode, as the battery charges, the
current from the charger slowly decreases. When this current decreases below the Set CV
Charge Done Amps setting, the charger transitions to the Silent charge stage. Most battery
manufacturers use a specifi c formula to determine the done amps that indicate a full charge
for their particular type of battery. The formula used by most manufacturers to absorb the
batteries is C/20, where C=Battery Bank’s Total Amp Hours. Basically, they take approximately
5% of the total battery bank size, and consider the battery totally charged when the charger’s
done amps drops to this level. Continuing to charge past this level may possibly overcharge
the batteries. Check with your battery manufacturer to fi nd out what the correct return amp
settings are for your batteries. Note: After choosing the Set CV Charge Done Amps selection,
the Set Max CC/CV Charge Time and Set DC Volts to Recharge settings must be determined.
Default: Amps = 20 ADC
Range: 0-250 ADC
Info: It is highly suggested that you install a battery monitor if the CV Charge Done
Amps setting is used. If a battery monitor is not installed, the CV Charge Done Amps
setting relies on the METER menu’s 01B Inv/Chg DC Amps value to determine when
to transfer out of the Constant Voltage charge mode. When a battery monitor kit (ME-
BMK/ME-BMK-NS) is installed, the CV Charge Done Amps setting relies on the METER
menu’s 05C DC Amps-BMK value to determine when to transfer out of the Constant
Voltage charge mode. This is the most accurate DC amperage measurement. The DC
amps reading from the battery monitor is accurate to +/ – .1 ADC.
Info: Setting the CV Charge Done Amps value to 0 (zero) will keep the charger in the
Constant Voltage charge mode until the Set Max CC/CV Time setting (under SETUP:
03C Battery Type/CC/CV) is reached.
Info: When using the CV Charge Done Amps setting, the charger will stay in the
Constant Voltage charge mode for a minimum of two minutes—even if the Done Amps
current is below the CV Charge Done Amps setting.
Info: If DC loads are connected directly to the batteries, it is not recommended that
you use the CV Charge Done Amps setting. DC loads cause the charger to increase the
amperage delivered to the battery bank in order to charge the batteries and to run the
DC loads. This scenario could result in overcharging the batteries since the done amps
reading will be skewed by the DC loads.
Constant
Current
Constant
Voltage
Silent
Constant
Current
Voltage
Current
Max Charge
Amps
CV Charge
Volts
Recharge
Volts
(restarts
Constant
Current
charge)
CV Charge Done
(= Time or Amps)
CURRENT & VOLTAGE
TIME