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Curtis 1620 Manual
page 12
Programming mode Description Programming
Limits
Default Value Increment Accuracy* Definition
BASIC MODE
2
Battery Type 1 or 21 1 1-FLA: Float voltage is set to 26.8V, Constant voltage set to 29V.
2-SLA:
Float voltage set to 27.6V, Constant voltage to 29.4V
End of Charge 1, 2, or 31 1 1-OFF: Charger goes into standby. Charger will cycle to recharge the battery as
determined by Vrst and enter standby at the end of the charge cycle.
2-EQUALIZE: Charger adjusts its output current to Ito, and drives the battery to Vequ.
It has the time allotted by Tto to do this or a fault will occur.
3-FLOAT: Charger goes into standby upon entering EoC Mode, and remains in standby
until the battery reaches Vfloat. At this point the charger turns on and maintains Vfloat
until power is recycled.
ADVANCED MODE Constant Current(Icc) 10-20A 20A 0.5A +/- 3% Current used to charge the batteries during normal (bulk charge) operation. This current
is used when the battery voltage is greater than, or equal to Vlv, and less than Vcv
.
Constant Voltage Level
(Vcv)
26-30V 29V 0.1VDC+/- 1% Battery voltage maintained by charger during bulk charge. This voltage is maintained by
continuously dropping the output current, until Veoc
is reached.
Low Voltage Current
(Ilv)
2-10A 6A 0.5A +/- 5% Current used to recover deeply discharged batteries; this current is used when the battery
voltage is greater than or equal to Vuvlo, and less than Vlv
.
Top-off current (Ito) 2-10A 6A 0.5A +/- 5%
Current used to Equalize the batteries.
End of charge ("soft" overvoltage)
(Veoc)
29-35V 31VDC 0.1V +/- 1% Charger goes into "soft" overvoltage mode, from which it recovers when battery voltage
drops below
Vrst.
EoC Threshold (Icv) 2-20A 4A 0.5A +/- 3% Current at which the charger transitions to
EoC mode.
Restart Voltage (Vrst) 22-28v 26VDC 0.1V +/- 1% Used when EoC Mode is EQUALIZE or OFF; the battery voltage at which charger
automatically turns on and recharges the battery. Charger must be in stand by mode when
this voltage is detected; the charger will charge the battery until it reaches Vcv and then
enter stand by mode.
Bulk Charge Threshold (Vlv) 0-26VDC 24VDC 0.1VDC +/- 1% Battery voltage at which the charger switches from Ilv to Icc
.
Low Voltage Lockout
(Vuvlo)
4-21VDC 5VDC 0.1VDC+/- 1%
Battery voltage below which the charger will not turn on.
Equalize Voltage (Vequ) 29-33V 31VDC 0.1VDC+/- 1% Used when EoC Mode is EQUALIZE. The voltage at which the EQUALIZE mode is
ended, unless the mode ends by reaching Tto
.
Float Voltage (Vfloat) 25-30V 26.8V 0.1VDC+/- 1% Used when EoC Mode is FLOAT. Once the battery voltage drops to this set point, the
charger will turn on and stay on, maintaining this battery voltage.
Low Voltage Timeout (Tlv) 1-10hrs1 hour 1 hour +/- 5min If battery does not reach Vlv within this timeout period, an error is indic
ated.
Equalize Timeout ( Tto) 0-5hrs2 hours 1 hour +/- 5min Used when EoC Mode is EQUALIZE. Number of hours charger is kept at equalization
current, unless the mode is ended by reaching Vequ
.
Maximum Charge Time
(Tcmax)
2-36hrs 16 hours1 hour +/- 1hr The maximum amount of time the charger has to complete a charge cycle and enter
standby mode. Failure to complete charge in the allotted time will result in a fault mode.
1 Accuracy is calculated as percentage of the maximum setting.
2 Items in bold are as they appear in the display of the 1311 handheld programmer.
Table 1. Programming Parameters