Rigol DL3021A [75/163] Ocp test function

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; if no,

the load fails the test.

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

Operation Procedures:

1. Connect the DUT and the channel input terminals of the load

Turn off the instrument, as shown in Figure 2-2, connect the DUT and the

channel input terminals on the front panel of the load.

Output Voltage of DUT

Load Current

Starting Current

Step Current

Step Delay

End Current