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4.4.1
Start Test
Instrument test timing diagram
When the instrument is in test mode, check the test conditions and the connected parts are connected
correctly. Press the START button to start the test.
4.4.2
Test Delay
After the test is started, the delay before the first step is delayed according to the set delay time of the
system interface.The delay between multiple steps is delayed according to the items in the system
interface.
4.4.3
Voltage Rise
Some of the characteristics of the DUT are sensitive to sudden changes in voltage and require this
function.When the instrument starts to output, the output voltage is zero. When the voltage output
starts, the instrument will control the output voltage to step up in 0.1S. The step boost value is
determined according to the test voltage and voltage rise time (ΔV = V / (10 *). S)).If the voltage rise
time (RISE OFF) is turned off, the default voltage rise time is 0.1 second, and the test time is
automatically added, so that the test time minimum is 0.2S.If this value is too small, it may cause an
error in the ARC or DC boosting determination. Please note.
4.4.4
DC boost decision
Whether the current upper limit determination function switch is activated during voltage rise is
mainly used to avoid test misjudgment.
When the distribution capacitance is small, if the charging current of the capacitor is relatively small
and does not cause a significant change in the current, the opening of the boosting determination can
detect the poor performance of the DUT and reduce the probability of over current damage of the
component.
When the step capacitance is large, the capacitor will have a charging process during the voltage rise.
The current at this time may be much larger than the set upper limit of the measured current. If the
boost determination is turned on, the upper limit misjudgment will be caused.If necessary, turn on the
short-circuit threshold to reduce the short-circuit sensitivity and increase the charging current.
4.4.5
High Voltage Test
Perform high voltage test of the DUT. At this point, it should be possible to ensure that the test circuit
is correct, and the test results are not affected by some special accompanying parameters. The display
content is the actual withstand voltage and current required for the test.
4.4.6
Test Voltage Fall
As with the rise of the test voltage, it is determined by the characteristics of the DUT.When the high
voltage test ends, the voltage falls, the instrument will control the output voltage fall in 0.1S units (the
DC voltage will not decrease with the control voltage). The step-down value is determined according
to the test voltage and voltage rise time (ΔV = - V / (10). *S)).If the voltage drop time (FAIL OFF) is
turned off, the default voltage fall time is 0.1 second.At this time, the instrument does not make a test
comparison judgment, the data is for reference only.When the voltage fall is over, the instrument will
connect the test circuit to the AC withstand voltage mode. At this time, if the DC voltage falls, the
device will discharge through the AC circuit of the instrument.
4.4.7
Ground Current Detection Function
Ground current detection is to detect the current flowing through the instrument chassis to prevent
electric shock.When the high voltage is output, there is a current flowing from the voltage output
terminal through the human body to the instrument chassis, which may cause very serious