LSU80A : Load Support Unit
Operators Manual
4 OPERATION
Before connecting to the load for the first time the LSU80A has to be set to the nominal voltage of
the load system it is going to supply. The following steps must be followed prior to connecting to
the load.
Apply power to the LSU80A with load unconnected. Power switch pressed to the down
position.
Press the RUN button and check the output state RUN LED is lit GREEN and the STOPPED LED
is not lit.
The VOLTAGE display will show the value of output voltage that is currently set.
Use the OUTPUT TRIM
push buttons to set the output voltage display to the load
voltage required. This setting will be remembered when power is removed. Note if you press
and hold either the
push buttons the adjustment will be continuous.
Press the stop button and check the RUN LED is not lit and the STOPPED LED is lit.
The voltage display will slowly reduce to zero, or will fall to zero very rapidly if the load is
connected.
At this point the load can be connected.
If any residual voltage is shown on the VOLTAGE display this will reduce very rapidly to zero.
If the load already has a voltage present, such as a battery maintained system then the
VOLTAGE display will show this value.
The following steps are followed upon equipment connection.
Press the START push button and verify the RUN LED is lit and the STOPPED LED is not lit.
The VOLTAGE display will show the output voltage.
The CURRENT display will show the output amps being drawn from the unit.
When the output voltage is no longer required press the STOP push button.
At very high currents the voltage drop in the leads may not provide enough voltage at the
equipment.
To overcome this high voltage drop the output voltage can be trimmed by pressing the
OUTPUT TRIM
push buttons to set the desired output. This setting will be remembered
when power is removed. Note if you press and hold either the
push buttons the
adjustment will be continuous.
On battery maintained systems caution must be observed when using the trim feature as not
to overcharge the battery as high voltages will cause some of the current to be passed to the
Doc: DWG1061-11-R2 LSU80A Operators manual.odt
Page 8 of 17
Copyright Material of Intelligent Charging Limited © 2018
Printed On : 17/07/19
