Constant Voltage Operation
In constant voltage operation, voltage values in limit mode and normal mode
are the same, but current values are not
To set the power supply in constant voltage operation, you must follow the
steps described bellow:
1. Select the limit values for voltage and current parameters (U
lim
and
I
lim
), depending on the application
2. Calculate resistor’s value R
load
.
Using Ohm’s law, calculate the resistor’s value that allows the power supply to
go in constant current mode of operation.
3. Turn on the power supply and set limit mode operation
Press Limit key to set limit mode.
Now the power supply displays limit values for voltage and current. lmt
indicator is displayed, too. (it will be displayed until you go to normal mode).
4. Set voltage and current limit values
Limit values must be chosen so the following conditions are respected:
U
lim
< I
lim
· R
load
,so
U
lim
< U
out
I
lim
< I
out
Voltage and current limit values are set using:
Volt / Amp key to select current value,
> < keys to select the digit to adjust (selected digit has cursor underneath it)
knob to set the digit to desired value
5. Set normal mode operation
You can set normal mode operation by pressing Limit key or let the display
time-out (after several seconds with no action, power supply returns to normal
mode operation).
6. Disable the output of the power supply
By pressing On / Off key, the output of the power supply can be disabled.
7. Connect R
load
resistor to the output terminals
R
load
resistor is connected between (-) and (+) terminals of the power supply.
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