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Test Equipment Anonymous (TEA) group therapy thread

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bd139:
Yes it’s london. It stabbed the other robin.

Something I ordered in September from RS just turned up. Was a capacitor. Can’t remember what it was for now though. 

Berni:

--- Quote from: tggzzz on May 21, 2018, 11:28:17 am ---One of the best satirical sites around at the moment is News Thump. Most of the articles are overtly political and so are (rightly) off-limits in this forum.

However, there is one that is just too close to the knuckle for the denizens of this thread: http://newsthump.com/2018/05/21/man-decides-to-keep-box-of-cables-hes-has-since-2002-for-another-year/

--- End quote ---

He knows how its done, you never know when you might need a strange cable to connect something.

Who knows maybe there are two lug triax BNCs in there.I had trouble finding those even on ebay... and payed way too much money for them once i did.

Specmaster:

--- Quote from: Cerebus on May 18, 2018, 07:13:23 pm ---
--- Quote from: Specmaster on May 18, 2018, 07:01:57 pm ---
--- Quote from: Cerebus on May 18, 2018, 06:59:14 pm ---
--- Quote from: Specmaster on May 18, 2018, 06:19:35 pm ---...and they weren't that far advanced when the 3478A's were made?

--- End quote ---

Yes they were. The remote calibration procedure is in the service manual.

The way most commercial cal labs process multimeters with a GPIB interface is just to hook them up to the calibrator with a set of leads, plug GPIB into a computer that drives both the calibrator and DMM, and press 'GO'. The computer identifies the DMM automatically over GPIB and then runs the whole process by 'magic'. You buy the software from your calibrator vendor. Fluke have MET/CAL, Wavetek/Datron used to have something similar and so on.

--- End quote ---
So which software should RS be using for the 3478 then, thats the question or could they be trying to wing it?

--- End quote ---

Generally things like MET/CAL have built in libraries of cal procedures for a selection of (generally more popular) instruments and a scripting language that you can use to add your own procedures for other instruments. You can see the list of built in procedures for MET/CAL at https://assets.fluke.com/metcalproc/html/procedure_list.html and, spoiler alert, the HP 3478A cal procedures are included for the Fluke 5520, 5700, and 5725 calibrators.

--- End quote ---
Just had a chat with the engineer who is doing the calibration on my meter and it seems that they were not aware of this MET/CAL software despite having and using a Fluke 5725 calibrator. Also seemed unaware of the fact that the meter was reading OK prior to the accident while replacing the Lithium battery to retain the Cal-Data, despite me filling that info in on the booking in form and was also unaware that I had emailed them 4 photos of the meter connected to my AD584-M reference module just before replacing the battery which shows it was working perfectly OK prior to then.

He is now going to look on the Fluke website about getting the required data to calibrate the 3478A. The thing that I find a bit to swallow though is the fact that they seem to be struggling to calibrate and or have the required means to calibrate what must have been one of the main stays in bench meters for a few years, surely someone in RS (its not a small operation covering some 48,320 sq metres of building space and much of that is on multiple floors), has come across a 3478A before??

If I had known before that RS would be struggling like this, I would have popped into Calmet Laboratorys personally and let them do it, even if they are more expensive, they were aware of the meter when bd139 spoke to them, unlike the person in RS I spoke to the first time who had to go ask someone else about it.  :palm:

I'll keep my fingers crossed that I actually get a working and calibrated meter back at the end of all this but at the moment RS have slipped of the pedestal that I have always thought they perched on.

Whats happens next if they can't do it and return it to me uncalibrated, I know that they have made many attempts to do it but in the end I paid for a proper calibration so I would hope that they refund me.


2.5V 5V 7.5V 10V

Specmaster:

--- Quote from: bd139 on May 21, 2018, 11:56:09 am ---Yes it’s london. It stabbed the other robin.

Something I ordered in September from RS just turned up. Was a capacitor. Can’t remember what it was for now though.

--- End quote ---
Yes it’s london. It stabbed the other robin.  :-DD :-DD :-DD Good one.

bd139:
With respect to RS, they've got calibration sources and Google. If they can't stick the two halves together they should attempt to calibrate themselves on the 300V AC setting.

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