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Still trying to test my alternator for ac noise, but it seems my fluke meter isn't good enough. 100mv is the least amount it will measure and ac noise for an alternator isn't suppose to be more than 50mv.
I did that and they closed the question and said consult an electrician. lmao One guy did say a fluke multi meter 117 would measure less than .05That's a tough one, if a fluke doesn't do it not much else will. I'd hop on an enthusiast electronics forum for that one.
You could do that, but you'd want to know the frequency and amplitude of the voltage signal, then you could size the capacitor value and ESR. Although knowing what the alternator output impedance would come into play at some point... I guess you could count on the distance from alternator to capacitor, it's what, 4nH per inch? times 2 for return path?Throw a capacitor/condensor on it and forget the measly millivolt readings you are looking for.
Do you take the alternator off to do the test?If you take the car to any auto parts store they can test the system for ripple.
It was an electricians forum and my username was The hobbyist. I guess that's what I get. lolI did that and they closed the question and said consult an electrician. lmao One guy did say a fluke multi meter 117 would measure less than .05
NoDo you take the alternator off to do the test?
What noise are you trying to measure. To test the alternator, you would be looking for AC ripple. Use the multimeter on ac volts, black lead to battery negative and red lead to battery positive on back of alternator. The reading should be less than 0.5 volts (500 mV). The Fluke meter is up to the requirement.Still trying to test my alternator for ac noise, but it seems my fluke meter isn't good enough. 100mv is the least amount it will measure and ac noise for an alternator isn't suppose to be more than 50mv.
Come again? .05 is 50mv you want less than 50 and I thought the red positive lead goes to the big wire on on the back of the alternator and you ground the black one to the negative terminal or I guess the alternator housing too if you want. My fluke 323 only reads 100mv or .1What noise are you trying to measure. To test the alternator, you would be looking for AC ripple. Use the multimeter on ac volts, black lead to battery negative and red lead to battery positive on back of alternator. The reading should be less than 0.5 volts (500 mV). The Fluke meter is up to the requirement.
I have this oneStill trying to test my alternator for ac noise, but it seems my fluke meter isn't good enough. 100mv is the least amount it will measure and ac noise for an alternator isn't suppose to be more than 50mv.
0.5 volts is 500mV. The Red lead off your multimeter goes to the postive wire on the back of the alternator.Please read the attached Fluke information. If you are not familar with multimeters this info will help. You could use autorange on the fluke multimeter on AC volts, what model Fluke do you have.Come again? .05 is 50mv you want less than 50 and I thought the red positive lead goes to the big wire on on the back of the alternator and you ground the black one to the negative terminal or I guess the alternator housing too if you want. My fluke 323 only reads 100mv or .1
0.5 Volts is 500mV. The red postive lead from you Fluke goes to the postive wire on the back of the alternator.Use the autorange function on ac volts. Please find attached Fluke pdf that may help you understand testing of alternators. What Fluke meter do you have.Come again? .05 is 50mv you want less than 50 and I thought the red positive lead goes to the big wire on on the back of the alternator and you ground the black one to the negative terminal or I guess the alternator housing too if you want. My fluke 323 only reads 100mv or .1
Figure 4. Checking ripple voltageRipple voltage or (ac voltage) can be measured by switching your DMM to ac and connecting the black lead to a good ground and the red lead to the “BAT” terminal on the back of the alternator, (not at the battery).A good alternator should measure less than .5 V ac with the engine running. A higher reading indicates damaged alternator diodes.Come again? .05 is 50mv you want less than 50 and I thought the red positive lead goes to the big wire on on the back of the alternator and you ground the black one to the negative terminal or I guess the alternator housing too if you want. My fluke 323 only reads 100mv or .1
Okay. Well he said the opposite0.5 volts is 500mV. The Red lead off your multimeter goes to the postive wire on the back of the alternator.Please read the attached Fluke information. If you are not familar with multimeters this info will help. You could use autorange on the fluke multimeter on AC volts, what model Fluke do you have.
0.5 Volts is 500mV. The red postive lead from you Fluke goes to the postive wire on the back of the alternator.Use the autorange function on ac volts. Please find attached Fluke pdf that may help you understand testing of alternators. What Fluke meter do you have.
Figure 4. Checking ripple voltageRipple voltage or (ac voltage) can be measured by switching your DMM to ac and connecting the black lead to a good ground and the red lead to the “BAT” terminal on the back of the alternator, (not at the battery).A good alternator should measure less than .5 V ac with the engine running. A higher reading indicates damaged alternator diodes.
The above is taken from the Fluke Beat Book. 0.5V is 500mV, try Google. What model Fluke do you have, the manual will give you the specs on the meter and how to use it. Autorange is very usefull if measuring unkown voltages.
Opposite to what,the red lead fom your multimeter goes to the positive on the alternator, I expected you to understand that I was referring to the black and the red leads from your multimeter,did the info help you, what model fluke are you using.Okay. Well he said the opposite