|
I have a uni-t multimeter advertised as 600v cat iii with a 600v 600ma fuse is this bad 
|
#
?
May 22, 2016 09:54
|
|
|
|
| # ? May 15, 2024 06:04 |
|
|
Lurking Haro posted:China Export is just a snappy backcronym. The CE mark only means the manufacturer promises that the product follows European health and safety directives, which is required for sales. It's not protected. Only of you start faking certification numbers you get in trouble. Nope. 
|
|
#
?
May 22, 2016 10:16
|
|
|
Carbon dioxide posted:Nope. Straight from the horse's mouth: http://www.europarl.europa.eu/sides/getAllAnswers.do?reference=P-2007-5938&language=EN You think they care about the exact definition of the symbol if they can slap it on there anyway? Probably no two of those allegedly "China Export" are the same.
|
|
#
?
May 22, 2016 10:25
|
|
|
In other words, the CE mark is as shoddily-copied as the items it's affixed to.
|
|
#
?
May 22, 2016 10:55
|
|
|
GotLag posted:In other words, the CE mark is as shoddily-copied as the items it's affixed to. Somehow it all makes sense this way
|
|
#
?
May 22, 2016 11:45
|
|
|
LUBE UP YOUR BUTT posted:I have a uni-t multimeter advertised as 600v cat iii with a 600v 600ma fuse is this bad Depends. It's listed as CAT-III. Are you working on something like a large 480V commercial/industrial power panel or at a utility source panel? If not, you're probably fine. Can you look up the interruption rating of the fuse? That's usually measured in kiloamps and that number is really important. It's not just the fuse - how the meter is designed internally counts as well. Like if there's a 600V fuse but due to the distances in the circuit traces, the electricity could arc to another path around the fuse. Generally with a multimeter the danger is when you try and measure voltage when the probes are plugged into the current ports. That creates a short circuit the fuse has to handle. Or you overvolt the input. There was a guy at a plant who went to the wrong starter and though he was measuring 480, it was actually 2400, and his meter exploded and he died at the hospital from severe burns. There was another example at a shopping mall where an electricians meter exploded working on a 480V panel with two other people. I think the article is on Electrical Contractors Magazine. That may have been an arc triggered inside the meter due to a transient from lightning. On the Flukes I've used, the unit's display flashes and speaker beeps furiously at you like a missile lock warning if it detects probes connected between common and the current inputs but the selector is switched to volts, resistance, or any similar setting. I think the Gosen-Metrawatt have moveable windows on the selector switch so you physically cannot have probes plugged into the current ports when the unit is switched into voltage or resistance modes. That's a very foolproof design. Three-Phase fucked around with this message at 12:25 on May 22, 2016 |
|
#
?
May 22, 2016 12:13
|
|
|
Here's the forensic investigation on the fatal arc flash/blast at the shopping center involving the multimeter: http://m.ecmweb.com/arc-flash/case-deadly-arc-flash article posted:For reasons we will never know, after checking all three phases, he made a comment to the effect that something was not right — and returned to the center lug a second time. As he made this measurement, a fireball erupted from the panel, severely burning all three individuals and causing significant damage to the electrical equipment and surrounding area. Although witnesses and medical professionals provided rapid response and assistance, the injuries proved fatal for the electrician and the fire official.
|
|
#
?
May 22, 2016 12:23
|
|
|
Three-Phase posted:Generally with a multimeter the danger is when you try and measure voltage when the probes are plugged into the current ports. That creates a short circuit the fuse has to handle. I think that's what I did. A few weeks ago the milliamp fuse on my Snap-on multimeter was blown (only discovered it when I went to measure a circuit and got a reading of zero), and I couldn't figure out why it would have. But now that you mention this I do remember trying to measure voltage, getting a weird reading, and then having to switch the probes to the correct holes. This probably happened on like a 12V circuit so there wasn't much danger of fire/explosion anyway, but I do occasionally measure up to 480V, so throw another example in the "Why you shouldn't cheap out on a multimeter" pile.
|
|
#
?
May 22, 2016 18:15
|
|
|
OSHA.csv A big text file of deaths. Some are predictably senseless: FY 2010,04/03/10,03/27/10,"Digital Domain, Venice, CA 90291",Worker was checking on office of a coworker. The worker opened the window and stepped out on the ledge where he slipped and fell to the parking lot below - approximately 20 - 25 feet.
|
|
#
?
May 22, 2016 18:27
|
|
|
Fumaofthelake posted:OSHA.csv Was his coworker Spider-Man?
|
|
#
?
May 22, 2016 18:35
|
|
|
C.M. Kruger posted:Here's a pretty horrible steel foundry disaster from China. Here's a picture of the accident from inside the foundry   
|
|
#
?
May 22, 2016 18:58
|
|
|
Svartvit posted:Imho F1 pit crew should always be fat and on fire. This is a pretty good example of OSHA as it goes - Benneton had deliberately removed part of the safety mechanism on the fueling rig to increase flow by about 10%, which of course cut their pit stop times right down. The safety mechanism they removed was the one that prevented exactly that sort of accident. (Also the worst injury that occured despite about 10 litres of fuel being sprayed around and ignited was some mild scorching to Jos Verstappen's nose and extensive underwear damage to all concerned, so yet another live advert for Nomex)
|
|
#
?
May 22, 2016 19:13
|
|
|
http://i.imgur.com/0CT8i0i.gifv
|
|
#
?
May 22, 2016 20:07
|
|
|
Doc is coming back from 1885.
|
|
#
?
May 22, 2016 20:27
|
|
|
I buy a lot of used electronics and it's always a hoot and a holler when the previous owner has left old batteries to die inside the battery compartment and leak poo poo everywhere. I know this isn't really OSHA but can someone tell me why it seems that one battery seems to be the one to leak and get totally hosed up while the rest seem to make it out OK and still have an almost full charge? 
|
|
#
?
May 22, 2016 20:52
|
|
|
 How many volts are those pantograph wires?
|
|
#
?
May 22, 2016 21:29
|
|
|
The truck hits the electrical wires, and then the neutral rails start sparking? What is going on here?
|
|
#
?
May 22, 2016 22:53
|
|
|
Carbon dioxide posted:The truck hits the electrical wires, and then the neutral rails start sparking? What is going on here? The truck actually pulls down a wire and it sparks as it flails across the ground. And I hear "pew, pew, pew" with each spark.
|
|
#
?
May 22, 2016 22:56
|
|
|
Frinkahedron posted:Harbor Freight gives those meters away with any purchase sometimes. You know, I got the email yesterday with a shitton of free coupon codes, including that janky multimeter (would only use it for sub-12V hobby stuff,) and none of them are working for me.  I have the min. amount required in my cart, buy every single one of the free item coupons tells me it's not valid. I mean...The only reason I'm ordering a set of cheap screwdrivers to toss in a junk drawer/bedroom closet for those times I need a quick screwdriver is BECAUSE they seent me coupons for like 6 free things. None of them work, and it's not worth calling their customer service line about. (One coupon was for a free power strip..that would probably be one I skipped using.)
|
|
#
?
May 23, 2016 00:13
|
|
|
My boss has the multimeter they showed in that video, I'll tell him to throw it away. Can't believe such a faulty/dangerous product is allowed to be sold
|
|
#
?
May 23, 2016 00:46
|
|
|
I'm waiting for someone to buy a really janky electrical device off of Ebay or Amazon, they get really seriously hurt or killed, and they end up taking Ebay or Amazon to court. I'm willing to be there's probably some legalese deep in their agreements with the consumers that indemnifies them in just that kind of situation. "Hey, we're really sorry that the Lucky Dragon Superior Qualty iPhone charger electrocuted your son. Take it up with their "legal department" in China. Now piss off unless you want to upgrade to Prime." *CLICK* There have been times when I've found stuff like LED lighting on Amazon, and then I see it (and a dozen variants) are all made by some random Chinese companies that may or may not be some random person's apartment. No thanks. Three-Phase fucked around with this message at 01:45 on May 23, 2016 |
|
#
?
May 23, 2016 01:43
|
|
|
DrBouvenstein posted:You know, I got the email yesterday with a shitton of free coupon codes, including that janky multimeter (would only use it for sub-12V hobby stuff,) and none of them are working for me. Read the text with the coupon, you're only allowed to use them one at a time, accompanied by legitimately purchased product. I buy a ton of stuff at HF store and redeem those, along with 20% OFF coupons nearly every time. The free multi-meters are working great when trying to fix cars and appliances. If someone is using them in some sort of industrial setting, they you deserve everything that happens.
|
|
#
?
May 23, 2016 05:11
|
|
|
Crazy Ted posted:It's high time to repost a classic: One of her uncles died in a logging accident in the 80s (he got crushed or something)
|
|
#
?
May 23, 2016 05:58
|
|
|
|
|
#
?
May 23, 2016 06:21
|
|
|
Three-Phase posted:I'm waiting for someone to buy a really janky electrical device off of Ebay or Amazon, they get really seriously hurt or killed, and they end up taking Ebay or Amazon to court. I'm willing to be there's probably some legalese deep in their agreements with the consumers that indemnifies them in just that kind of situation. I am currently trying to figure out how to recoup damages to my equipment due to a faulty bench powersupply. Now it is a cheap no-name, but I have had the exact same model working away daily for about 2 years now so I trusted it a little. So I buy new one, first thing I plug into it shorts and dies. I got my money back from the power supply though. I'm at a point where I have lost a piece of equipment 5 times the value of the supply. As of now the seller doesn't give a poo poo. eBay says to talk to seller. I ask seller for his chain of supply so I can at least report it to SOMEONE within the manufacturers company. The supply is currently sitting on a workbench at my work waiting for one of our EE's to test and at least provide some form of professional testing report. Not sure where to go from here.
|
|
#
?
May 23, 2016 09:06
|
|
|
Humphreys posted:I am currently trying to figure out how to recoup damages to my equipment due to a faulty bench powersupply. Now it is a cheap no-name, but I have had the exact same model working away daily for about 2 years now so I trusted it a little. So I buy new one, first thing I plug into it shorts and dies. I got my money back from the power supply though. See now, the damages were caused by your ignorance. An adult person should know (and I bet I've posted the very same thing like a thousand times but here it is again for your pleasure:) since everything is made by child slaves in China, the only difference between a cheap no-name power supply and a non-cheap brand-name power supply is quality control*. That's why one good unit should not have made you think another unit would be any good. *) And packaging/casing but that's not relevant here. tl;dr: If your Poundland dialysis machine works, you just got lucky this time.
|
|
#
?
May 23, 2016 09:15
|
|
|
Of course in a first-world country you'd still get compensated.
|
|
#
?
May 23, 2016 09:17
|
|
|
Jerry Cotton posted:Of course in a first-world country you'd still get compensated. Australia - so a swing and a miss!
|
|
#
?
May 23, 2016 10:02
|
|
|
How much money are you talking about?
|
|
#
?
May 23, 2016 11:49
|
|
|
I think everything in Australia costs at least 1000000$
|
|
#
?
May 23, 2016 11:55
|
|
|
Or maybe that's just video games and internets.
|
|
#
?
May 23, 2016 11:56
|
|
|
Buck Turgidson posted:How much money are you talking about? Second hand market on replacements I'm looking at just under $2000. I could spend a lot of sweat equity and do board level repairs if I was desperate. I'm not, and kind of lazy looking into consumer laws/guarantee rights.
|
|
#
?
May 23, 2016 12:00
|
|
|
If someone running a business on eBay (ie not some guy making a once-off trade) sells me a faulty power supply which damages a bunch of my stuff, I definitely have a leg to stand on with regards to compensation for the broken stuff under the ACL. But the ACL isn't a magic wand I can wave at someone to make money fly out of their pockets. If they don't want to pay, I have to go to court. If the seller is overseas it's going to be a gigantic pain in the bum or impossible and I'd be better off doing repairs or paying for a replacement. If the seller is in Australia, it's still going to be a pain in the bum, and probably not worth doing over the relatively low sum of $2000. The moral of the story is don't buy a crap power supply.
|
|
#
?
May 23, 2016 13:25
|
|
|
But if you think the product is unsafe, be a sweetie and report it to your state's Consumer Affairs/Fair Trading body or to the ACCC.
|
|
#
?
May 23, 2016 13:29
|
|
|
I was just reminded of a story about a guy my dad worked with. He worked for Washington Gas for a while checking lines and working at pump stations/checkpoints. One day there was a report of a natural gas leak at a station and 2 guys were sent to investigate. Apparently, one of the guys was lazy and instead of walking across the room to flip a breaker off, he shorted the circuit with a wrench to kick the breaker. Can anyone guess what happened when that short caused a spark?
|
|
#
?
May 23, 2016 13:45
|
|
|
Well i'm sure the breaker flipped. Possibly in concert with the entire wall it was on.
|
|
#
?
May 23, 2016 13:53
|
|
|
Mithaldu posted:Well i'm sure the breaker flipped. Possibly in concert with the entire wall it was on. They didn't even have a chance to. The entire station, the truck, both men, and a pretty large radius beyond them completely vaporized.
|
|
#
?
May 23, 2016 13:55
|
|
|
GnarlyCharlie4u posted:They didn't even have a chance to. The entire station, the truck, both men, and a pretty large radius beyond them completely vaporized. How did they know what happened?
|
|
#
?
May 23, 2016 13:57
|
|
|
TTerrible posted:How did they know what happened? They saw if from hell.
|
|
#
?
May 23, 2016 13:58
|
|
|
|
| # ? May 15, 2024 06:04 |
|
|
Oh you mean how did other people know?
|
|
#
?
May 23, 2016 13:58
|
|