Sequoia / Tahoe Series User Manual California Instruments
160 M447352-01 REV-A
Figure 5-96. Mode Settings
REGULATION Selects options for regulation of the output voltage: whether ALC
is enabled, and what control action will be performed when the
load current reaches the current setpoint. The defaults are
CV/CL, with a Delay of 0.2 seconds, and ALC on.
Constant-Voltage/Constant-Current (CV/CC): CV/CC mode
will regulate the output voltage to the set value until the load
current reaches the current setpoint; after the Delay interval, if
the current exceeds the setpoint, the output current will be
controlled to equal the setpoint. Regulation of the load current is
accomplished by reducing the output voltage as needed to satisfy
the load. As such, the voltage could be reduced from the set
value down to zero, depending on the load requirement. This
mode is useful for starting up motor or capacitor loads that may
require a high inrush current.
In the constant-voltage mode of operation, the waveform and
instantaneous amplitude of the output voltage is regulated to
equal the programmed values; if Volt ALC is enabled, the RMS
value is also precisely regulated. In the constant-current mode of
operation, the RMS value of the output current is regulated to
equal the programmed value. However, this is accomplished by
controlling the voltage amplitude and waveform, and not directly
the current; therefore, the current instantaneous amplitude and
waveform and dependent on load characteristics.
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