.. _regulation-states:

Regulation States
-----------------

The |product_full| has four regulation states: :ref:`constant-voltage`, :ref:`constant-current`, :ref:`constant-power`, and :ref:`constant-resistance`. The active regulation state is indicated by a illuminated circular LED next to the respective voltage, current, power, or resistance set-point button. The active regulation state can also be monitored programmatically.

.. _constant-voltage:

Constant Voltage (CV)
^^^^^^^^^^^^^^^^^^^^^

When the constant voltage regulation state is indicated, the |product_type| is maintaining fixed voltage set-point, while the current flucuates with the driving DC source, as illustrated by :numref:`fig-operating-mode-cv`.

.. _fig-operating-mode-cv:

.. figure:: /_common-all/_images/operating-mode-cv.*
	:width: 300pt
	:align: center

	Operating range in constant voltage mode

.. _constant-current:

Constant Current (CC)
^^^^^^^^^^^^^^^^^^^^^

When the constant current regulation state is indicated, the |product_type| is maintaining a fixed current set-point, while the voltage fluctuates with the driving DC source, as illustrated by :numref:`fig-operating-mode-cc`.

.. _fig-operating-mode-cc:

.. figure:: /_common-all/_images/operating-mode-cc.*
	:width: 300pt
	:align: center

	Operating range in constant currnet mode

.. _constant-power:

Constant Power (CP)
^^^^^^^^^^^^^^^^^^^

When the constant power regulation state is indicated, the |product_type| is maintaining a fixed power set-point by varying the current level inversely in response to a change in input voltage, as illustrated by :numref:`fig-operating-mode-cp`.

.. _fig-operating-mode-cp:

.. figure:: /_common-all/_images/operating-mode-cp.*
	:width: 300pt
	:align: center

	Operating range in constant power mode

.. _constant-resistance:

Constant Resistance (CR)
^^^^^^^^^^^^^^^^^^^^^^^^

When the constant resistance regulation state is indicated, the |product_type| is maintaining a fixed resistance set-point, by sinking input current linearly proportional the input voltage, as illustrated by :numref:`fig-operating-mode-cr`.

.. note:: The constant resistance regulation state will only be indicated when the |product_type| is configured for :ref:`mode-resistance`.

.. _fig-operating-mode-cr:

.. figure:: /_common-all/_images/operating-mode-cr.*
	:width: 300pt
	:align: center

	Operating range in constant resistance mode