EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: Andy-In_over_my_head on December 15, 2016, 06:23:15 am
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I pulled out the first multimeter I had before I started buying more and noticed it had a transistor tester...
I did try the search box here first... fat goose egg...
I don't get the hFE meaning... nor the numbers it's displaying.. especially with it starting at -0.12 with no transistor inserted... |O
If you could please point me in the right direction of a similar multimeter review or something that explains this a bit...
Thank you in advance!
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I pulled out the first multimeter I had before I started buying more and noticed it had a transistor tester...
I don't get the hFE meaning... nor the numbers it's displaying.. especially with it starting at -0.12 with no transistor inserted... |O
If you look at any transistor datasheet there's a value called 'hFE'. That's what it measures.
(https://www.eevblog.com/forum/testgear/digitek-ds830b-multi-meter-(can-i-be-pointed-to-a-review)/?action=dlattach;attach=278135;image)
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I pulled out the first multimeter I had before I started buying more and noticed it had a transistor tester...
I don't get the hFE meaning... nor the numbers it's displaying.. especially with it starting at -0.12 with no transistor inserted... |O
If you look at any transistor datasheet there's a value called 'hFE'. That's what it measures.
(https://www.eevblog.com/forum/testgear/digitek-ds830b-multi-meter-(can-i-be-pointed-to-a-review)/?action=dlattach;attach=278135;image)
Bummer, I didn't want to end my night with my foot in my mouth... but here I am.. foot in mouth..
So this multimeter has these only to measure the current gain?
I'm sure it will be useful somewhere along the line...
Thanks...
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So this multimeter has these only to measure the voltage gain?
Yep. It's a good indicator of whether the transistor is working or not.
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Etymology of hFE:
h refers to its being an h-parameter, a set of parameters named for their origin in a hybrid equivalent circuit model.
F is from forward current amplification also called the current gain.
E refers to the transistor operating in a common emitter (CE) configuration.
Capital letters used in the subscript indicate that hFE refers to a direct current circuit.
(extract from Wikipedia)
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Notes about hybrid equivalent circuits:
https://parthoduet.files.wordpress.com/2013/02/ch-59.pdf
59.14 explains h-parameters
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Bummer, I didn't want to end my night with my foot in my mouth... but here I am.. foot in mouth..
Don't worry, we've all been there. :-DD
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Hello, i just Beging use avometer , And buy Digitek DS830B , , I need to know BUZZ botton in this model , Thank you