A39 UNIVERSAL SCR CHARGER INSTRUCTION MANUAL
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MODEL A39 "UNIVERSAL CHARGER"
The La Marche Model A39 "Universal Charger" is a microprocessor controlled SCR charger which has
adjustable output voltage, adjustable output current limit, and an adjustable charge timer.
The output voltage, output current, time left to charge, and error codes are displayed on a 1/2" high red
LED digital display.
The voltage range adjusts from 10% to 100% of the rated value, the current limit range from 5% to
100% of rated output current, and the charge timer range adjusts between 30 minutes to 99 hours in 30
minute increments.
The A39 may be used as a constant current charger where the open circuit voltage can be adjusted, or
as a constant voltage charger with a current limit mode. The voltage characteristics in the constant
voltage mode are programmable by "dip
”
switches for a "flat
”
1% regulation curve or a tapered charge
curve.
A "select
”
push-button changes the display function from amps, to volts, or to time. These are displays
of actual unit conditions.
The "set
”
mode is actuated by depressing the "select
”
push-button and holding it in. The toggle switch
then allows adjustment of voltage current limit, or timer hours up or down from the initial setting.
The initial voltage setting is derived from the actual battery voltage when the battery is connected. The
current limit automatically defaults to 20% of the rated output and the charge timer defaults to 8 hours
on start up.
The Model A39 will "Auto" start upon connection to a battery and "Auto" stop when the charge cycle is
terminated by disconnection or a normal charge complete.
STANDARD FEATURES
* Microprocessor Control
* Auto Start/Stop Circuitry
* Digital Display 1/2" Red LED (Amps, volts, amp
hours, elapsed time, error codes, voltage setting,
current setting, timer setting)
* AC Breaker
* LED Lights for "ON" charge, Charge complete,
Unit failure, Current limit
* Automatic Surge Protection
* Digitally adjustable current limit, output voltage,
and charge time
* Output cables with lugs
* Constant current mode
* Single & Three Phase inputs
* "Flat" 1% Regulation mode
* Fault mode diagnostics
* Tapered charge curve mode
* DC fuse (Standard)
* Wide Current, voltage, & timer ranges
* DC Breaker (Optional)
* Reverse Polarity Protection
