Matsusada HARS Series, Инструкция по эксплуатации

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4 Basic Operation and Screens
18
HARS series
4 Basic Operation and Screens
4-1 Operating Modes
The product has two operating modes (constant voltage mode and constant current mode) with two control
modes (local mode and remote mode).
As of the constant voltage mode and constant current mode with local mode, the operating mode is
determined according to these values.

Output voltage setting value ( V
SET
)

Output current setting value ( I
SET
)

Load resistance ( R
L
)
4-1-1 Constant Voltage Mode (CV Mode)
The device operates in constant voltage mode when the load current I
L
is smaller than the set output
current I
SET
( I
L
< I
SET
, I
L
= V
SET
/ R
L
). In constant voltage mode, the output voltage is constant at the
set value ( V
SET
), while the load current I
L
changes according to the load.
By setting output current or power to a value that is greater than what is actually required when using
CV mode, it is possible to output power while keeping the required output voltage.
4-1-2 Constant Current Mode (CC Mode)
The device operates in CC mode when a load current I
L
is greater than the set output current I
SET
( I
L
> I
SET
). In constant current mode, current is constant at the set value ( I
SET
), whereas load
voltage changes depending on the load.
V
SET
= Constant voltage set value
I
SET
＝
Constant current set value
R
L
= Load resistance
[Image of the operating mode]
4-1-3 Crossover Operation
The series are equipped with an automatic crossover system that switches operating mode
automatically with changes in load response. For example, in CV mode, when fluctuating load causes
load current to exceed the set current, CC mode automatically takes over. In CC mode, when
fluctuating load causes load voltage to exceed the set voltage, CV mode automatically takes over.
V
SET
R
L
<
Constant current range
Output
voltage
Current
Constant voltage range R
L
>
< R
L
<
I
SET
Output current
Crossover point
V
SET
I
SET
0
V
SET
I
SET
V
SET
2
I
SET