When the power button is pressed the LEDs and meter self-test sequence will operate, as illustrated in the following video.
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The Tester flashes red then green five times (1 second each cycle). Meanwhile the meter rotates smoothly up to 30+ kV, then returns to 0 kV. Then the LEDs are off (for 2 seconds), green (for 2 seconds), then off (for 2 seconds). The green LED then illuminates until the Tester times-out, is turned off or is used to measure a voltage.​
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