Operating Modes; Voltage Regulation - Agilent Technologies N8900 series Operating Manual

Autoranging system dc power supply

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Operating Modes

Current Regulation

Power Regulation

Voltage Regulation

Voltage regulation is also known as constant voltage mode (CV).

In CV mode, the DC output voltage of the power supply is held constant at its voltage setting, unless the output current

or the output power reaches the current limit setting or the power limit. In both cases the device will automatically

change to constant current (CC) or constant power (CP) operation. The output voltage is no longer held constant, and

will sink to a value according to Ohm's law.

When the power supply is operating in constant voltage mode, the front panel CV status indicator is displayed. The CV

status condition can also be read by the remote interface as well as the analog interface.

The figure below shows an operating locus that is defined by voltage setting, current setting, and power limit of the

unit.The load resistance determines the point on that locus at which the power supply actually operates. The line rep-

resenting Load resistance A, the highest load resistance shown on the figure, crosses the operating locus at point 1.

Point 1 is on the part of the operating locus defined by the voltage setting, so the power supply operates in CV mode.

Agilent N8900 Series Operating and Service Guide

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