P.O. Box 1306
Newport Beach
California 92663
Phone: 714-751-0488
Fax: 714-957-1621
E-Mail: [email protected]
4.4
Adjust Boost to Float Current Threshold
Connect a variable load (set to minimum load) to the battery connections of the SPS. Disconnect the Temperature
Compensation Probe. Connect an accurate current meter in series with the load. Turn on AC to the unit, wait 10
seconds and then adjust the load up slowly until the unit goes into Boost Charge mode (as indicated on the LEDs).
Slowly decrease the load until the rectifier switches to Float Charge mode.
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 to Float Current trimpot to set the required current value (0.1A to 40% of full load).
4.5
Adjust Current Limit
Connect a variable load (set to minimum load) to the load connections of the SPS. Disconnect the Temperature
Compensation Probe. Connect an accurate current meter in series with the load. Turn on AC to the rectifier and
adjust the load until the rectifier goes into current limit (as indicated on the LEDs).
Adjust the Current Limit trimpot slowly to set the required current limit. Do not exceed 100% of the rated current.
Note that the current output requires time to settle when you adjust the trimpot.
4.6
Adjust Over-Voltage Shutdown
This adjustment requires a variable voltage power supply (that has a maximum voltage exceeding the over-
voltage value to be set).
Connect the variable voltage power supply across the load connections of the SPS (ensure that +v output of the
variable supply is connected to the +v load connection). Disconnect the Temperature Compensation Probe.
Connect an accurate voltmeter across the output. Turn the mains on to the rectifier and adjust the variable
voltage power supply up until the unit goes into over-voltage shutdown (as indicated on the LEDs).
Adjust the Over-Voltage Shutdown trimpot to set the required voltage limit. Note that the SPS will cycle on and off
– this is normal.
4.7
Adjust Low Voltage Disconnect and Hysterisis
This adjustment requires a variable voltage power supply (that has a maximum voltage exceeding the voltage
value to be set).
Connect the variable voltage power supply across the battery connections of the rectifier (ensure that +v output
of the variable supply is connected to the +v battery connection). Connect an accurate voltmeter across the load
connections of the rectifiers.
Leave the rectifier disconnected from the AC. Switch on the variable power supply and adjust the voltage up until
there is voltage on the load connections. Adjust the variable voltage down slowly until the load voltage drops
suddenly, indicating the load has been disconnected.
First - Adjust the LVD Voltage trimpot to set the required ‘on’ voltage limit.
Second - Adjust the LVD Hysterisis trimpot to set the required ‘off’ voltage limit.
4.8
Adjust Temperature Compensation Slope
The rectifier assumes that the battery temperature is 25°C when the Temperature Compensation Probe is not
connected. Disconnect the Temperature Compensation Probe, and adjust the boost and float charge voltages to
that required for 25°C. Reconnect the Temperature Compensation Probe and cool the metal lug to 0°C (using a
container containing ice and water -
do not
immerse the probe in the water as it is not waterproof).
Adjust the Temperature Compensation Slope to set the required charging voltage at this temperature as
determined by the manufacturer’s specification.
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