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From: Spehro Pefhany
Subject: Re: Determining type of passive component on LCR meter
X-Newsreader: Forte Agent 1.92/32.572
Date: Thu, 09 Jan 2003 15:17:05 GMT
NNTP-Posting-Date: Thu, 09 Jan 2003 10:17:05 EST
On 9 Jan 2003 06:34:48 -0800, the renowned firstname.lastname@example.org
>I am trying to determine if there is a way to distinguish between
>unknown passive components using an LCR meter or some other type of
>measuring equipment. Some passive componets don't always have part
>markings and if they get mixed up how can I determine what type of
>part it is and the value. An example would be removing a resistor and
>an inductor from a reel and getting them mixed up. Is there any type
>of measruing equipment available that I can just put one of the
>components in and determine if it is a resistor, capacitor or and
Usually they "look different". I have some 100uH axial-lead chokes
that sort of look like 100R resistors, but the body color is green
rather than beige. If you put a choke on an ohmmeter, it would
meaure very low resistance, probably a couple of ohms for that one.
Then you can check it with an L meter to be sure. If you put a small
cap on an ohmmeter (such as a 100pF axial-lead capacitor) it will
measure open, you can then measure it with a capacitance meter.
You can get LCR bridges that will tell you how much of a resistor
and how much of an inductor that inductor is, but it would not
be cost effective to use for that purpose. Cheap < $100 LCR meters
can give a rough check.
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