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its output. If an OCPT test fails, the interface of the load will pop-up a
message box such as “Below limit, Test fail”, “Over limit, Test fail”, etc. Then
the input channel of the load will automatically turn off.
4. View waveform
Press the Display key to enter the waveform display interface, as
shown in figure 2-31. The sink current should have a stepped increase
in the waveform when viewing current (I) data. . Press the Display key
again to exit the waveform display interface and return to the main
interface of OCPT test mode.
Figure 2-31 Waveform display interface of OCPT
OPPT Test Function
When the Over Power Protection Test (OPPT) test starts, if the input voltage is
less than the Von value, the load will start when the delay time specified by the
delay setting has expired. The power increases with incrementing steps set by
P_Step. At each step, the load input voltage is compared to the overpower
protection voltage (OPP_V). If higher, it indicates that OPPT will not occur. The
load proceeds to run and increases the sink power with regular steps until it
reaches the protection voltage setting (OPP_V) or the last power setting
(P_End).
If the sink power of the load has reached the stop value (P_End) , the
load output will shut off automatically, the OPPT test fails, and the test ends. If
lower, it indicates that OPPT will occur. If the measured power under test is
within the set maximum (P_MAX) and minimum power range (P_MIN), the load
passes the test. If not, the load fails the test.
