Rigol DL3000 Series, User Manual

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Chapter 2 Front Panel Operations RIGOL
DL3000 User’s Guide 2-45
Application Function
The load supports the following three application functions. Press APP to switch
among the three functions.

OCP test function

OPP test function

Battery test function
OCP Test Function
OCP test principle (as shown in Figure 2-28)
When the OCP test starts, after the input voltage reaches Von, the load will delay for
a period, then starts to sink the current, increasing with incrementing steps at a
certain interval. Meanwhile, the load will compare the detected voltage value with
the OCP protection voltage value. If higher than the protection voltage value, the
load proceeds to run and increases with incrementing steps until reaching the
protection voltage.
If OCP occurs to the DUT, judge whether the current under test is within the
maximum and minimum current range. If yes, the load passes the OCP test. Digital
output of I/O interface on the rear panel is 0. If no, the load fails the test. Digital
output of I/O interface on the rear panel is 1.
If no OCP occurs to the DUT and the set protection time times out, the load
automatically stops sinking. The OCP test fails, and the test ends.
Figure 2-28 OCP Test Function
Tip
In the system setting menu, set the digital output to be "Disable", then the OCP
test status is associated with the digital output of I/O interface on the rear panel.
t
V
Output Voltage of DUT
Load Current
I
t
V
I
Starting Current
Step Current
Step Delay
End Current
t
V
I