DMM Database - Mains 110/220 over Ohms range

[Zero999]

Correct, the actual test for CAT III & CATIV is 8000V transients with a 2 ohm source and the test is repeated 20 times. But most meters are designed to meet the standard, rather than being tested to comply with the standard. There is a very big difference.

Regarding the CE joke, it's not actually a joke it's a fact. Some products have a CE symbol which the chinese say stands for China Export but it very similar to the E.U.'s CE mark, and is very deliberate. Also another issue is that the CE mark and standard now uses a  "Self Declaration", so while it's expected that it would have been tested by a indepentant lab, it may not have. If you see UL, TUV or CSA marking's on a product they carry more weight because they are indepentant lab's.

Yes, manufacturers should perform type testing which is normally destructive: your DVM doesn't need to actually survive an 8kV spike, it just needs to not blow up or electrocute the user when subjected to such abuse.

I'm not sure that using an independent lab is necessary better, in the US I believe that UL overcharge and take advantage of their near monopoly position which just makes it harder for companies to get their produces into the market place. In my view, I see no problem if a European company can prove they've designed their product in accordance the appropriate safety stands and have tested it thoroughly.

Of course no Chinese company ever bothers with all of that hassle and will just sell anything.

Have you ever evaluate the true cost of the electronic parts used on one £5 retail DMM ?

Its less than  half £ , stop the nagging and start build some ..   

How are you going to mount an IC's die directly on the board so you can cover it in resin?

If you build a DVM to a similar specification yourself, it will cost much more because you'll probably have no choice but to order decent components in small quantities. You could try your luck with ebay but your more expensive meter might end up being as bad or worse than the Chinese one.

[Kiriakos-GR]

How are you going to mount an IC's die directly on the board so you can cover it in resin?

I will use the same robot  that those people use ...  in their assembly line..

Now lets go back on topic.. 

[Simon]

then it will costs you more than £0.5 to make, back to topic: I'm not risking any of my meters, what about yours ? what have you got and have they passed ?

[Kiriakos-GR]

back to topic: I'm not risking any of my meters, what about yours ? what have you got and have they passed ?

Yes I have full success :

UNI-T 30D  Passed ... no incidents at all ( incidents = flashing display or messages )

Pro's kit  03-9303C  Passed ... no incidents at all ( Got an minus indication as response of the connection)

The analog Metrawatt MA 4S ( 1980 ) got tested  too ,  it has inner relay as protection,
it made an click sound and interrupted the connection of leads with the meter ..    

Both Fluke 8010 & 8012  passed

Fluke 8050 Passed  

The Fluke 87-5 passed ( with some difficulty )  it was asking for more than 220 to be tested,
and I had  nothing to give ....  

Anything that called as multimeter in my repairs shop , it did pass the test .. and it feels good.  


 

[Neilm]

Yes, manufacturers should perform type testing which is normally destructive: your DVM doesn't need to actually survive an 8kV spike, it just needs to not blow up or electrocute the user when subjected to such abuse.

Is that true of the Ed3 standard?

Also - it is expected that the importer of any product made outside the EU will have the device tested. In the event that it fails in the field they will be the ones held responsible.

Neil

[Kiriakos-GR]

In all my life ( and I am 41+ ) I have not see any declaration .. as tested by the importer at any product.

Everything looks to sold on " good will " ...   and the only safety net its the product warranty.

But what good has the warranty to offer in something that its made to die !!  

And what if , in the printed instructions there is an " Warning " ...Beware do not use the meter at Oms range at Mains ...

And so what ? ... does that makes any sense ?

[Kiriakos-GR]

Additional info for the Pro's kit  03-9303C  , That I safe keep the box since 1994 .

( I actually scanned the meter on my EPSON  flatbed    and did an amazing work )  

Pictures ..  

(My only nag are that the 20M & 200MOhms range are out of calibration,
and I have no info about repairing it )