Testing a leaky diode

[Mr Bill]

What methods are there? I can test it with my multimeter in the diode function but is that good enough? I came across this link that suggests using a 9v battery.
http://www.ehow.com/how_7549053_test-leaky-diodes.html
Is this a sufficient method, or is there a better way of doing it? And can this be done in circuit?

Thanks

[rievax_60]

Re: Testing a leaky diode

What methods are there? I can test it with my multimeter in the diode function but is that good enough? I came across this link that suggests using a 9v battery.
http://www.ehow.com/how_7549053_test-leaky-diodes.html
Is this a sufficient method, or is there a better way of doing it? And can this be done in circuit?

Thanks

Not while the diode is in circuit because the 9 volts might find other current paths.
I don't think the article mentioned schottky diodes. These will have some reverse leakage. I just measured one at 10uA.
I use the ohm range on my Fluke DMM for power supply diodes. I find that diodes used in power circuits either test good or obviously bad. The exception again are schottky diodes with a normal reverse leakage resistance. I just measured one at 15KΩ.
Also schottky diodes will show a forward resistance reading on a DMM where silicon diodes tend to read open.
I think this is why there is a diode test range to test the forward bias voltage drop of silicon diodes.