LSU220A : Load Support Unit
Operators Manual
4 OPERATION
Before connecting to the load for the first time the LSU220A 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 LSU220A with load unconnected. Power switch rotated
clockwise to position 2.
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
pq
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
pq
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
pq
push buttons to set the desired output. This setting will be
remembered when power is removed. Note if you press and hold either the
pq
push buttons the adjustment will be continuous.
Doc: DWG1063-08-R2 LSU220A Operators Manual.odt
Page 8 of 16
Copyright Material of Intelligent Charging Limited © 2018
Printed On : 17/07/19
