P.O. Box 1306
Newport Beach
California 92663
Phone: 714-751-0488
Fax: 714-957-1621
E-Mail: [email protected]
To adjust the settings, appropriate test equipment is necessary (depending on the adjustment). A variable
load, a variable DC power supply, and an accurate voltage and current meter are required. The SPS should be
unscrewed from its mounting. The SPS must be disconnected from the battery and load. The adjustment trimpots
are accessible on the rear side of the rectifier, with the AC input oriented to the left, the trimpots read as follows.
4.1 Standard Settings
Item
SPS 12-20
SPS 24-10
SPS 48-6
Boost Voltage
14.2V
28.8V
57V
Float Voltage
13.7V
27.4V
54V
Boost to Float Current
2A
1A
0.5A
Over Voltage Shutdown
16V
32V
60V
Temp Comp 25° C
13.7V
27.4V
54V
Temp Comp 5°
14.06V
28.32V
55.9V
LVD On Voltage
12V
24V
48V
LVD Off Voltage
10V
20V
40V
Current Limit
20A
10A
6A
Trimpot View Orientation: From back of unit with AC input socket on left.
4.2
Adjust Float Voltage
Connect a variable load (set to minimum load) to the battery connections of the rectifier. Disconnect the
Temperature Compensation Probe. Connect an accurate voltmeter across the load. Turn on AC to the unit. Wait
approximately 10 seconds for it to switch back to Float Charge mode. Check that the LEDs indicate Float Charge
mode.
Adjust the Float Voltage trimpot to set the required float voltage.
4.3
Adjust Boost Voltage
Connect a variable load (set to minimum load) to the battery connections. Disconnect the Temperature
Compensation Probe. Connect an accurate voltmeter across the load. Turn on AC to the unit and adjust the load
until the unit goes into Boost Charge mode (as indicated on the LEDs).
Note that there is a 10 second delay when switching from Boost Charge mode to Float Charge mode, but no delay
when switching from Float to Boost.
Adjust the Boost Voltage trimpot to set the required boost voltage.
LVD
Hystersis
LVD
Voltage
Current
Limit
Float
Voltage
Boost
Voltage
Temp Comp
Slope
Boost to Float
Current
Over-Voltage
Shutdown
11