Nakup multimetra 2022

starfotr je 30. avg 2022 ob 11:51 izjavil:

Jap, samo moraš vedet, da so to inštrumnti s ceno x3 ali več v primerjavi s temi poceni igračami.

Top znamke so Fluke, Keysight ipd.

matobeli je 24. feb 2024 ob 19:03 izjavil:

Sicer pa, odvisno kaj delaš z njim.

A. Smith je 25. feb 2024 ob 15:51 izjavil:

Jaz s Kitajskimi multimetri ne bi želel meriti ničesar na energetiki, AC omrežju in napetorstih nad 100V. Ti multimetri so dovolj dobri za prčkanje po nizkonapetostni elektroniki, kdor pa misli, da je z njimi varno početi karkoli na AC omrežju (tudi doma), naj si prebere spodnje linke.
https://www.ecmweb.com/safety/arc-flash...
https://iaeimagazine.org/2008/july2008/...
https://hackaday.com/2015/06/02/fail-of...

What actually started the arc at the bus bars? Either it resulted from the meter explosion itself or arcing at the probe tip as the electrician instinctively pulled it away in response to the noise and flash. Once the bus bars began to arc, the victims' fates were sealed, as there was no turning back at that point.

Kjerkoli je zadaj bolj konkretna zaloga moči, je potrebno, da je multimeter dobro varovan. Ustrezna mora biti kategorija električne izolacije, zmogljivost vgrajenih varovalk, zmogljivost vezja v multimetru za absorbiranje napetostnih konic, itd.

In fact, I cannot think of another single piece of electrical equipment that has as high a rate of injury to the worker. Something must be done, and ESA is taking the initiative. A recent survey ESA conducted with 5,000 electricians from across the province of Ontario revealed that 11 per cent of respondents had experienced a “violent failure of a multimeter.” This number is staggering and certainly unacceptable.

Presenetljivo pri nas ne slišim za dosti nesreč z merilnimi instrumenti. Morda tudi zato, ker privatniki praktično ne kupijo drugega, kot Fluke in ostalih high-end naprav. Očitno cenijo lastna življenja. Pametno!

Our cause and determination analysis of these accidents pointed to user error, in the majority of cases, as the source problem followed closely by internal component failure.
User errors would include:
Wrong settings (i.e., ohms scale selected when testing voltage)
Wrong "CAT" area application
Wrong probe socket used (i.e., amps instead of volts)
Wrong use of the product, such as switching settings under power
Wrong voltage applied, exceeding limits of meter.
Adding to the user error problem is wear, tear and contamination within the meter that creates internal component failures or compromises the components' dielectric properties. Still other causes concluded that because of complicated markings on the meter, many users have no idea what a "CAT" rating is, let alone the fact that using a CAT II meter in a CAT III area can lead to their catastrophic failure. At the risk of being over simplistic, CAT ratings on a meter indicate the maximum voltage a meter can be used in a "geographic" area of the electrical system, regardless of the proper selector setting--a very difficult undertaking to ascertain by the end user.

Frgazor je 22. feb 2024 ob 09:19 izjavil:

aneng

Jaz imam tole reč za 5EUR v kevdru za kako baterijo pa upor pomerit. Kar sem primerjal rezultate meritev z zaresnim multimetrom je spot on. Nor pa nisem, da bi s tem rinil v zaresne napetosti.

mirator je 25. feb 2024 ob 22:06 izjavil:

Ne tiščim glave v pesek in tudi verjamem, da lahko pride do nesreče z multimetrom, vendar so v večini primerov krivi merilci sami, kar potrjuje tudi citat iz tvojega linka: