B&K Precision 9171-9174 - Manual - Manual (Page 75)

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The 9184 supply output is initially OFF (disabled). The LED light bar
is rated for 170 V. A 10 Ω resistor is placed in series with the LED
light bar. The power supply current setting (ISET) is 20 mA.
Using an oscilloscope to probe between the resistor to measure
current, the power supply’s output is then turned ON. The measured
results are shown in Figure 21, which compares the measured
results with and without LED mode ON (enabled):
Inrush current
LED Mode OFF (disabled) LED Mode ON (enabled)
Output ON Output ON
Figure 20- LED Testing Example
Figure 21 - Inrush Current With and Without LED Mode Enabled