©
2014 Magnum Energy, Inc.
Page 101
Using a PT Controller: Setup
Info:
The ME-BMK battery monitor is required if the
CV Chg Done Amps
setting is used.
The
CV Chg Done Amps
setting relies on the
METER: 05D DC Amps-BMK
value to de-
termine when to transfer out of the Constant Voltage charge mode.
Info:
Setting the
CV Chg Done Amps
value to zero keeps the charger in the Constant
Voltage charge mode until the
Max CC/CV Time
setting (under
SETUP: 06A Battery
Type: CC/CV
) is reached.
□
Set Max CC/CV Time
– This setting is a safety feature that ensures abnormal condi-
tions do not cause the charger to hold batteries at a high voltage for a prolonged period
of time. This menu sets a maximum time the charger is allowed to operate in either the
Constant Current (Bulk charging) or Constant Voltage (Absorb charging) charge modes.
If the charger reaches the
Max CC/CV Time
setting, it will transition to the Silent charge
stage (status is
Float Charging
). The
OFF
selection can be used if there is an application
where 25.5 hrs is not long enough.
Default:
12.0 Hrs
Range:
OFF,
0.1-25.5 Hrs
CAUTION:
If using “
OFF
”, the batteries can be held at a high voltage for an extended
time. Monitor the batteries to ensure they are not overcharged.
Info:
The internal timer for the Set Max CC/CV Time feature increments when the
battery voltage is above the
Float Volts
setting (from the
SETUP: 06A Battery Type
menu) and resets when the controller goes into Float charging.
□
Set Recharge Volts
– This setting determines the DC voltage set-point to which
the batteries are allowed to fall—while the charger is in the Silent charge stage (status
is
Float Charging
)—before the charger restarts and recharges to the
CV Charge Volts
setting. This setting should be slightly above the lowest DC volts level to which you want
the batteries to fall. Typically, the lowest DC volts to which the batteries are allowed to
fall is 12.0 to 12.2 VDC (12-volt systems), 24.0 to 24.4 VDC (24-volt systems), and 48.0
to 48.8 VDC (48-volt systems), respectively.
Default:
12.0 VDC (12v), 24.0 VDC (24v), 48.0 VDC (48v)
Range:
9.0-16.0 VDC (12v), 18.0-32.0 VDC (24v), 36.0-64.0 VDC (48v)
Figure 10-1, CV Charge Done Time/Amps (PT Controller)
Bulk Charging
Absorb Charging
Float
Charging Bulk
Voltage
Current
Max Charge
Amps
Recharge Volts
(restarts CC
stage)
CURRENT & VOLTAGE
TIME
CV Charge
Volts
CV Charge Done
(= Time or Amps)
CC Stage
CV Stage
CC = Constant Current
CV = Constant Voltage
CC
Silent
Charge Stage
PT Status
CV
Absorb
