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SIGLENT
180 SDS2000X User Manual
Inrush
The inrush current analysis measures the peak inrush current when the power supply is
first turned on.
1. Press the Utility button on the front panel to enter the UTILITY function menu.
2. Press the Next Page softkey to enter the second page of the UTILITY function menu.
3. Press the Power Analyze softkey to enter the ANALYSIS function menu.
4. Press the Analysis softkey, and then turn the universal knob to select Inrush and
press down the knob to confirm.
Figure 108: ANALYSIS Function Menu
5. Connect probes to the device-under-test and to the oscilloscope as well.
6. Select the proper attenuation ratio for the probes.
a. Connect D+ of the voltage probe to the live wire of the AC input.
b. Connect D- of the voltage probe to the neutral wire of the AC input.
c. Connect the current probe to the live wire of the AC input with the direction of the
arrow pointing towards the current flow.
d. Connect the voltage and current probes to the desired oscilloscope channels.
7. Press the Signal softkey to enter the SIGNAL menu.
Figure 109: Inrush Analysis SIGNAL Menu
8. Press the Voltage and Current softkeys and then turn the universal knob to select the
channels.
9. Make sure the proper probe attenuation factors are set in the oscilloscope for the
voltage and current probes.
10. Press the Expected softkey, and then turn the universal knob to specify the expected
inrush current amplitude. This sets the vertical scale of the channel probing current.
11. Press the Max Vin softkey, and then turn the universal knob to specify the maximum
input voltage. This sets the vertical scale of the channel probing voltage.
12. Return to the ANALYSIS function menu.
13. Press the Apply softkey to perform the analysis. Follow the onscreen instructions
showing as below:
a. Turn off the power supply, then press Next.
b. Turn on the power supply, then press Next.
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