How to Test a Resistor | Galco
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- Опубликовано: 6 мар 2017
- Resistors are electrical components that limit the flow of electrical current in an electronic circuit. They can also be used to provide a specific voltage for an active device such as a transistor. If you ever suspect that a resistor may have become faulty, here is a way to test them.
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Thank you for useful info 👍
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Is this multimeter auto ranging? This could be important if you run into a resistor in which the printing or color bands are faded or difficult to read.
My bands are (in order from the closest edge) : RED (2) / BLACK (0) / BLACK (0) / RED (10 x 10 or 100) / BROWN (100 tolerance) if I read right ....
So 200k Ohms
When I touch the leads it gives me 19.85. to 20.11 ... is that accurate ?????
Is it good ? Or does that decimal point determine if it's weak or blown ?
if the continuty buzzer start while testing the resisitor what it means.... the resistor is faulty or not,,??
best company resistor name
Hello. Is there a way to find a workless resistor without disconecting and test all of them of the circuit? I mean, when you have no idea of which one has a problem. Thank you
What do you do if you can read the value because the numbers have faded?
These all resistance value colors below:
Value. Color. Multiplier (x10) Tolerance
0. Black 0
1. Brown 1 1 %
2. Red 2 2%
3. Orange 3
4. Yellow 4
5. Green 5 0.5%
6. Blue 6 0.25%
7. Purple/Violet 7 0.1%
8. Grey 8 0.05%
9. White 9
10. Gold -1 5%
11. Silver -2 10%
12. No color --- 20%
For example of 4 band or 5 band color of a resistor:
For 4 band color:
10 Ω with tolerance is 5%
(brown - black - black - gold)
47 Ω with tolerance is 5%
(yellow - purple/violet - black - gold)
560 Ω with tolerance 5%
(green - blue - brown - gold)
5.100 Ω (5,1k/5K1Ω) with tolerance is 5%
(green - brown - red - gold)
15.000 Ω (15kΩ) with tolerance is 5%
(brown - green - orange - gold)
270.000 Ω (270kΩ) with tolerance is 5%
(red - purple/violet - yellow - gold)
2.000.000 Ω (2MΩ) with tolerance is 5%
(red - black - green -gold)
12.000.000 Ω (12MΩ) with tolerance is 5%
(brown - red - blue - gold)
240.000.000 Ω (240MΩ) with tolerance is 5%
(red - yellow - purple/violet - gold)
1.000.000.000 Ω (1GΩ) with tolerance is 5%
(brown - black - grey - gold)
47.000.000.000 Ω (47GΩ) with tolerance is 5%
(yellow - purple/violet - white - gold)
For 5 band color:
47 Ω with tolerance is 1%
(yellow - purple/violet - black - silver - brown)
390 Ω with tolerance is 2%
(oramge - white - black - black - red)
2.200 Ω (2,2k/2K2Ω) with tolerance is 1%
(red - red - black - brown - brown)
51.000 Ω (51kΩ) with tolerance is 1%
(green - brown - black - red - brown)
470.000 Ω (470kΩ) with tolerance 2%
(yellow - purple/violet - black - orange - red)
1.500.000 Ω (1,5MΩ) with tolerance is 2%
(brown - green - black - yellow - red)
15.000.000 Ω (15MΩ) with tolerance is 1%
(brown - green - black - green - brown)
470.000.000 Ω (470MΩ) with tolerance is 1%
(yellow - purple/violet - black - blue - brown)
1.500.000.000 Ω (1,5GΩ) with tolerance is 2%
(brown - green - black - purple/violet - red)
56.000.000.000 Ω (56GΩ) with tolerance is 1%
(green - blue - black - grey - brown)
470.000.000.000 Ω (470GΩ) with tolerance is 2%
(yellow - purple/violet - black - white - red)
Just use a multimeter
How would I test a 399ohm resistor in circuit with esr meter. That is in my vehicle cluster with out taking resistor out to see if it's bad?
Just measured in circuit. If you get a much greater resistance. It is definitely faulty. But also if there are any in parallel with it. This can still throw you off.
How check fusible ragistor
My cordless drill charger stopped working no LED’s displayed, I checked the resistor and it reads 00.5, there’s power going to the charger, but no LEDs lights up or charge the battery, is my resistor bad?
I want to more about resistor
If the resistor not working, then what the multimeter shows.. Or how to find a workless resistor with multi meter.. Please reply sir..
First determine what the value is supposed to be, and the tolerance range, either it is printed on it or you have to decode the color bands. If the resistor is only out of tolerance then your meter will show a resistance value but not in the correct range. If it is completely open then the meter will show the same display as if it was not touching anything. Fluke brand multi-meters show OL for open loop, ok?
@@GalcoIndustrial What if you don't disconnect it from the circuit and you measure but you get OL even if the meter is set on beeper? Does this mean that the resistor is actually totally broken or not ?
1:27 the whole reason I came here. How do you to that? What is the math behind determining the appropriate setting based on a resistors known value?
Well you can leave meter on AUTO range if has that feature, or just measure the resistor and see what it shows you. Push the range button until you get a reading, a digital meter becomes very obvious.
So when you’re measuring ohms and get an OL reading…I didn’t find the answer to my question in this video. I’m assuming the resistor is dead and I need a new one.
How has it gone bad is this because it has been left out for too long. If I wrap it in aluminium foil will it keep fresh longer.
No
@@davidschnase4027 It was a joke.
One more doubt sir... Actual value of a resister is 1000 ohms... multimeter showing 977...this resister is open??..
No it is not open. It is only 2.3% out of tolerance depending on the accuracy of the meter, ok?
approximately value writeen ok no problem
There has to be a better way
I ordered two packs of resistors..
One pack 820 one pack 330
830 readys 0.814, and the 330 reads 324.0
What is going on I don’t understand lol
820
Be sure to check the scale of your meter when taking these 2 measurements. You most likely missed the "K" symbol next to the value. 0.814K ohms is 814 ohms with a difference of the marked value well inside 10%.
And check the tolerance ... if they're 5% then these are within that range.
Hi