Setup
©
2017 Sensata Technologies
Page 35
Figure 3-12, CV Charge Done Time/Amps Charge Stages
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)
CU
RRE
N
T
&
V
O
L
T
AG
E
TIME
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.
*
Set CV Charge Done Amps
– This setting determines how long the charger holds
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 speci
fi
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
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