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shaun 1.For diode testing the forward dc current is about 1mA, open circuit voltage is about 3V. This will check the diode and LED current but is unlikely to light an LED. 2. Frequency ranges are 10Hz to 10MHz (upto 550V AC or DC). 3. If by backlight you mean the LED on the rear, then yes you can (it isn't very bright though). If you meant the display backlight, then no you can't (as you wouldn't see the display). 4. AC Voltage frequency range is not specified. But they usually cover 50 and 60 Hz pretty well. 5. The crest factor depends on the shape of your waveform.

2020-06-27 01:45:12 Utile (2)
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