TEXIO LSG SERIES, Instruction Manual

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7-5-2. CR Mode
CR Mode When the unit is set to CR mode it will operate
as a constant resistance load when connected to
a constant voltage source. This means the unit
will maintain a set resistance, up to the rated
power, regardless of the input voltage. When
input voltage changes, the unit responds by
changing the current load to maintain the set
resistance according to ohm’s law. This is
illustrated below.
CR Mode
Load Input
Voltage
Load Current
CR Value
CR+CV Mode When CR+CV mode is enabled, the unit will act
as constant resistive load after the input voltage
is greater than the user-defined CV level. At the
CV level, the unit works as a constant voltage
load. This mode effectively creates a voltage
ceiling before the unit operates in CR mode.
The diagram below illustrates this.
CR + CV Mode
Load Input
Voltage
Load Current
CV level
CR Value
Note that when the source voltage is less than
the CV level, no current will flow due to a very
high impedance.