Local Operation
3-26 M370430-01 Rev B
Setting Foldback Mode
Foldback mode is used to disable the output when a transition is made
between the operating modes. The power supply will turn off/disable the
output and lock in foldback mode after a specified delay if the power
supply transitions into CV mode or into CC mode, depending on the
foldback mode settings. This feature is particularly useful for protecting
current or voltage sensitive loads. Foldback can be set to trigger a switch
when transitioning from CV to CC mode or from CC to CV mode.
To set the foldback protection and foldback delay time:
1. Turn the 9-position mode control to the FLD position or press
the rotary Adjust/Enter control if the 9-position mode control
is already at the FLD position.
2. Select the type of crossover that will cause foldback to trigger
by using the rotary Adjust/Enter control.
If the mode selected is CC or CV mode, the foldback delay timer
will start on a transition into the selected mode. If the mode
selected is none, foldback is not enabled.
3. Press the rotary Adjust/Enter control when the desired mode
has been selected.
The FLD LED will illuminate and will be displayed in the
output voltage display.
4. Adjust the desired delay time using the rotary Adjust/Enter
control.
The range can be set from 0.50 seconds to a maximum of 50
seconds. The step size is in increments of 0.05 seconds when
setting from 0.50 to 5 seconds and then in 1 second increments
from 5 seconds to 50 seconds.
5. Once the desired foldback delay time has been selected, press
the rotary Adjust/Enter control to commit the foldback delay
setting.
To disable foldback protection:
1. Turn the 9-position mode control to the FLD position or press
the rotary Adjust/Enter control if the control knob is already
at the FLD position.
2. is displayed on the output voltage display and the output
current display shows the current foldback trigger mode.
3. Turn the rotary Adjust/Enter control until is displayed
in the output current display.
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