Teardown Tuesday: Fluke 87-5 (versus a cheap turd)
So, as I alluded to getting a new meter. I did. I got myself a Fluke 87-5.I already had a meter; it's (as Dave Jones from EEV Blog says) one-hung-low Chinese cheap turd.Of course this isn't a fair comparison, but it's a fun comparison. :-PSo the Fluke is a 4 1/2 digit and the Greenlee is a 3 1/2. The Fluke can measure up to 20A (for a short time) and the turd can measure a 200ma DC.Let's take a peak inside. :-DTake a look at the blast shielding near the fuse and the awesome custom input jacks. Quality all the way.Here's another good view of the routed out slot gaps where the blast shield would go.Oooohhh, and look at the input protection:Mmmm... thick-film resistor network (blue flat thing) and MOVs and a PTC.I picked this up from Amazon from one of the 3rd-party sellers so I didn't really know what I was going to get. It was new, but would it be a really new one?Woot! The REV 011 version is the new one that fixes the GSM interference problem.Let's take a look at the turd.It does have a fuse that I had to take out to get the board out. Thankfully it is an HRC fuse so they got something right. But there's absolutely no input protection at all and the current is measured through a poorly soldered 1-ohm resistor:Compare that to the Fluke:A proper current shunt with four-wire measurement of voltage across it!Mmmm.... quality. :-P[smugmug url="http://photos.vec.com/hack/feed.mg?Type=gallery&Data=26513447_7PWtkt&format=rss200" imagecount="100" start="1" num="100" thumbsize="Th" link="smugmug-lightbox" captions="false" sort="false" window="true" smugmug="true" size="L"]