How to Determine if Resistor is Good or Burnt: Checking Methods & Tips [Max 90 characters]

Question

The question is as in the subject, how can I check if resistor is it good or burnt?

mos18 · Answer

Hello, the resistor is checked with an ohmmeter. Apply an ohmmeter to the resistor and check that the resistance shown on the meter matches the resistance rating of the resistor.

SUCHAR125 · Answer

I have a meter, but I do not know what nominal resistance this resistor has

stan000 · Answer

Enter if it has a description with numbers or colored stripes, and if so, write what.

maryann · Answer

If the subtitles or code are illegible due to charring - such resistance can be considered burnt. Even when it is good, it may fall to the rest in a moment. If the ohmmeter measurement shows anything at all, it is rather a true value, which can be verified by the determinations; if verification is not possible - see above.
Sometimes it is possible to pluck off burnt paint and measure, for example, a resistance layer in the middle of the length; it is not exact, but it allows you to judge at least an order of value that it should have.

john_t · Answer

Then you have a problem... The resistor most often blows on the so-called a break but not always. Sometimes it also increases its resistance, in this case the measurement with the meter does not make sense. It may also look like burnt paint and the resistor is OK. And one more thing to measure, it should be desoldered (one foot is enough) from the system.

lebo24 · Answer

If you do not know the value of the resistor, you can desolder it and solder the resistors of the highest resistance and then half the resistance, etc.
But you have to see if the system fires and if the resistor does not heat up.
Because he burned under the load. So by trial and error you will get to a similar resistance where the system starts and the resistor does not work.

Czeslaw10 · Answer

Write what is this system, maybe we will find a diagram and the problem of resistor value will be solved.

SanceS · Answer

It is best to use a cascade resistor, or a regulated resistor with a large adjustment range, instead of soldering different resistors (you have to move very gently). greetings

john_t · Answer

I do not recommend this method! And what if this resistor will be in the circuit of a bridge or a control divider, e.g. quiescent current of some power system without overload protection ??? To do this, you need to have a diagram and know how this resistor affects the rest of the system. One more thing, the resistor usually doesn't burn by itself, there is almost always some reason.

How to Determine if Resistor is Good or Burnt: Checking Methods & Tips [Max 90 characters]

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