Products > Test Equipment
Fluke 115 and Nanofarad Capacitance Readings
Barry A. Waters:
--- Quote from: BeBuLamar on April 16, 2023, 06:06:23 pm ---You know that Fluke doesn't repair the Fluke 11x series? If there is something wrong with it they simply destroy it.
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Yeah, I would imagine that the entire production, calibration and QC process is heavily automated for such a low end (for Fluke) series with little human intervention and not deemed worth repairing if any of them come back. Mass production = Mass disposal? Too bad....
Barry
Barry A. Waters:
--- Quote from: bdunham7 on April 16, 2023, 06:37:49 pm ---How close were the other meters? Can you try measuring the DC resistance of the capacitors with the meter in question? Can you check what the meter reads in the capacitance range with an open circuit (no leads)?
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The second 115 has been repackaged for return and is not accessible. The other meter (Radio Shack 22-181) was within the 20% tolerance for the ceramics 104s and the 5% tolerance for the blue cube 1J63s, which is what I would expect. If the third 115 shows up and has the same issue I will perform your tests. I assume testing the resistance would be the same as if I was testing a resistor. What would I be looking for result wise? For your 'open circuit' test are you asking for what the meter reads in the capacitance setting with no leads attached?
Barry
bdunham7:
--- Quote from: Barry A. Waters on April 16, 2023, 08:00:30 pm --- The other meter (Radio Shack 22-181) was within the 20% tolerance for the ceramics 104s and the 5% tolerance for the blue cube 1J63s, which is what I would expect. If the third 115 shows up and has the same issue I will perform your tests. I assume testing the resistance would be the same as if I was testing a resistor. What would I be looking for result wise? For your 'open circuit' test are you asking for what the meter reads in the capacitance setting with no leads attached?
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You mentioned having and testing a 117 and another 115 as well. What results did those give? I would expect your plastic capacitors to read virtually the same on all meters, but of course the Y5V ceramics will vary wildly with measurement method and voltage.
Testing a capacitor for DCR should eventually give an open circuit indication (>60M) although it can take a moment to get there. Yest, the open circuit test can be just the meter with no leads set for capacitance. It should read no more than 2 counts. This is actually a calibration and performance test point.
I should have asked--how exactly are you connecting the meter to the capacitors? Is it standard test leads with alligator clips and the tests are hands-off? Or something else?
Barry A. Waters:
--- Quote from: bdunham7 on April 16, 2023, 08:21:37 pm ---You mentioned having and testing a 117 and another 115 as well...
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Those were meters belonging to posters above that reported theirs working as I expect mine too.
Barry
Martin72:
--- Quote from: Barry A. Waters on April 15, 2023, 06:20:20 pm ---. I called Fluke support and they agreed that I should be seeing something closer to 100 nF and told me to take the meter back. I did and got a replacement and it does the same thing. I note that the meter appears to work in all other respects and is very accurate when testing electrolytic caps in the uF range (4.7, 10, 47, 100, 220, etc.).
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I guess the fluke use dc-signal for cap testing, therefore the lower the cap is, the worser it gets.
--- Quote ---Is there something I and the Fluke rep are not understanding here? Could anyone who has this meter check a 104 Ceramic Cap and let me know what they get? I'm baffled.
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We got several 117 here and 1 or 2 115, can check this tomorrow - Could be interesting because we never used them for cap testing.
--- Quote --- If it's a calibration issue it may have been a batch because the serial numbers of the two units are only 42 apart.
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There is a calibration "manual" avaible, the cap function won´t be calibrated.
https://dam-assets.fluke.com/s3fs-public/114_____cieng0200.pdf?c6lU5ClGysQYEd1McgX5RgPYq8k60kdP
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