Products > Test Equipment

Old Fluke Multimeters

<< < (88/192) > >>

Mr. Scram:

--- Quote from: frozenfrogz on August 27, 2017, 04:46:05 pm ---
--- Quote from: Mr. Scram on August 27, 2017, 04:01:37 pm ---Why did the post crack exactly? I don't quite get the gist of the spot welding remark.

--- End quote ---

I guess Electro Detective was saying, that the screw bonded e.g. "spot welded" with the screw post, thus needing excessive (in regard to pure stick/slip friction between metal and plastic) force to loosen the connection.

--- End quote ---
Ah. I wonder what could be done to mitigate the issue. Cracking your hundreds of dollars costing device is never a lot of fun. Maybe some light penetrating oil might help, or vibrating the screw while trying to unscrew it?

So much innuendo.

switcher:
I had the perfect job for my 8060 today; to which no other meter is better suited; in conjunction with my HP signal generator (from 1970) checking the crossovers and drive units in my B&W speakers.  :-+

jh15:
Haven't heard a reply from the seller of my 8060a.  He said to contact within 3 days to work stuff out in his ad. I did, so will wait. Also 30 day return with me paying shipping.

Still willing to open and t-shoot.

Fully qualified for this with esd station, and pedigree of Lead Tech with technicians repairing Flukes in aerospace and avionics instrument repair labs. 

rsjsouza:

--- Quote from: frozenfrogz on August 25, 2017, 07:13:26 pm ---
--- Quote from: Neomys Sapiens on August 25, 2017, 06:48:12 pm ---I have encountered those problem occasionally, but never on a meter that was owned by me from first hand.

--- End quote ---

Being careful is always a considerable option. On the other hand I can not deny that self-tapping screws are usually a sign for cheaply made products. Even the Voltcraft 6010 made in Korea by Hung Chang (rebranded HC601) has brass inserts.

--- End quote ---


--- Quote from: drtaylor on August 25, 2017, 10:26:52 pm ---Remember that Fluke pioneered the handheld LCD DMM with the release of the 8020. The 8060s case was derived from that and the means of screwing the halves together was developed for the 8020 and its derivatives. This type of plastic does get more brittle over time, but for the most part, the self-tapping (designed for plastic) screw sheathes have held up fine. Brass inserts are no panacea as I have seen them pulled out or actually break the plastic they are swedged into. I never over tighten the mounting screws and never use an electric screwdriver to put them in. BTW, I would not lube the screws, just be careful.

--- End quote ---

In my experience I confirm what David is saying: despite self tapping screws fare a bit worse, brass inserts have their problems as well. I lost count of so many times a screw on a brass insert was simply "stuck" due to corrosion that caused the plastic post to give up. Self tapping screws are not inert to this (one of my 8020As has mildly corroded screws which cause additional friction), but my experience tells me how brittle the plastic gets over time is the most defining factor on this.

frozenfrogz:
Can anyone tell me what thermoplastic the newer Fluke multimeters are made out of? I was looking for recycling info markings on a lot of teardown photos, but could not find anything useful :/ I have seen a whole lot of different Fluke tools in ABS injection molded housings though. I expect quality tools to feature quality materials such as glass fiber reinforced PA6, PC or something comparable instead of cheap-arse ABS.
Back in the day, there were not that many options to choose from, but that is so much different now.
Regarding brass inserts: If done right, they do a tremendous job. However molding them in ABS is still just a half-baked solution.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod