Keysight Technologies N69100 Series, Руководство по эксплуатации и обслуживанию

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Current Priority
In current priority mode, the output is controlled by a bi-polar constant current feedback loop, which
maintains the output source at its programmed setting. The output current remains at its programmed
setting, provided the load voltage remains within the voltage limit setting. Current priority mode is
best suited for use with batteries, power supplies, large charged capacitors, and loads that are
sensitive to current overshoots. It minimizes current overshoots during programming, turn-on, and
turn-off transitions.
In current priority mode, the output current should be programmed to the desired positive value. A
positive voltage limit value should also be set. The voltage limit should always be set to a value that is
greater than the actual output voltage requirement of the external load. The following figure shows
the current priority operating locus of the output. The area in the white quadrants shows the output as
a source (sourcing power). The shaded quadrants show the output as a load (sinking power).
The heavy solid line illustrates the locus of possible operating points as a function of the output load.
As shown by the vertical portion of the line, the output current remains regulated at its programmed
setting as long as the output voltage remains within its limit setting. A CC (constant current) status
indicates that the output current is being regulated and the output voltage is within its limit settings.
Note that when the output voltage reaches the voltage limit, the unit no longer operates in constant
current mode and the output current is no longer held constant. Instead, the power supply will now
regulate the output voltage at its voltage limit setting. A LIM+ (positive voltage limit) status is set to
indicate that the voltage limit has been reached. This condition is annunciated by VL+ on the front
panel.
For additional information on priority mode operation during output turn-on/turn-
off, refer to
Turn-On Turn-Off Behavior .
4 Using the DC Power System
144 Keysight N69100 Series Operating and Service Guide