| Products > Test Equipment |
| Fluke 115 and Nanofarad Capacitance Readings |
| << < (5/9) > >> |
| Martin72:
I find it remarkable that you already had such problems with two 115. Not that it is a general error in the batch. :P |
| BeBuLamar:
I don't have problem with Fluke DMM but I do have problem with the Fluke IR3000FC unit. It uses the IR port on Fluke 189, 289, 187, 287 DMM to provide the Fluke Connect to connect to cell phone. I bought 2 units and one works but the other one doesn't. I keep exhanging about 3 of them and still not finding one that worked. So Fluke sent a rep to see me and the first thing he did was to upgrade the firmware and after that none of the units work. He gave up. And to this day I don't know how to buy a Fluke IR3000FC and make sure it would work. The serial number on the units that didn't work are all over the place. Not the same batch I don't think. Also the one that worked before he updated the the firmware has the lowest serial number. So I mean it could happen to have a bunch of them not working right. |
| Barry A. Waters:
*** NOTE: The assertion below that the Test Leads were the issue is INCORRECT. The REAL issue was ME holding the capacitor leads in contact with the Test Leads with thumb and forefinger! See later posts for details *** And I have discovered the problem. It's not the meter itself but the meter's test leads. It's like they are acting as additional storage capacity and making the the smaller caps look larger than they really are. If I dispense with the leads entirely and insert the cap leads directly into the meter's test lead sockets then everything reads as it should. The Radio Shack 22-181 I have has a dedicated Cap/Resistor test port so that's why it was reading OK - no lengthy test leads involved with it. The test leads that came with the 115 are 55 Inches long so I guess that's a lot of insulated copper when you think about it. I cobbled together a 4 Inch long set and Voila, the meter reads nF caps as spec'ed. I am a happy camper once again! :) For those of you who were kind enough to test read some caps and reported success with your meters in the nF range, how long were the test leads you used? I'm thinking the shorter the better. I think I'm going to put something together with two banana plugs and a spare header connector so I can have a 'plugin test port' for these things with NO test lead length to worry about. Thanks to everyone who assisted on this as it was driving me nuts! I just couldn't believe such a meter would have a problem like that. I feel bad about turning one in but at least I had my epiphany before I returned the second one. Now what to tell the wife about the third one that arrives tomorrow... :-// Barry |
| Martin72:
Ah ! :D :-+ |
| gamalot:
55 inches of test leads should not cause any problem here, most of the test leads for multimeters in the world are similar to this length. |
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