EEVblog #755 - Fluke PM2812 PSU Ebay Score

Comments · 182

• EB

  @ebenjamin8109 · 11 years ago

  Front binding posts were an option for these power supplies (I have 2 single channel units and one dual channel unit with this feature). It is a metal section that attaches to the underside of the main unit using 7/8&quot; stand offs with screws that pass through the feet. The lower section consists of 5 posts (Chassis GND, V-, S-, S+, V+) and a sense switch (local or remote). It is electrically connected to the main unit via 4 wires that run inside the lower section and attaches to the terminal block on the rear of the main unit using common spade terminals. In order for the binding post section to function without throwing a FAIL error, there is a jumper on the power output board that needs to be in the OFF position to disable the onboard capacitor between the V+ and V- output terminals; this is necessary because there is a capacitor already incorporated in the binding post section. Below is a link for the user manual.<br><br><br>http://assets.fluke.com/manuals/pm2800xxumeng0300.pdf

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• BI

  @BigManko · 11 years ago

  We need an &quot;MORE COUCH FEET!&quot; T-Shirt.

  38

• AI

  @aisotton · 11 years ago

  You could make an acrylic case so you can see inside while it&apos;s running. Acrylic sheets are pretty easy to glue and drill. If you still have your intern he should have access to a laser cutter at university :-)

  5

• DR

  @Dreamagine1 · 11 years ago

  I&apos;m sure Dave has nightmares of couch feet chasing him

  5

• US

  @userPrehistoricman · 11 years ago

  Whatever you do to the case, I think it needs some new feet. Couch feet.

  2

• WE

  @WestCoastMole · 11 years ago

  Dave regarding the wooden case I would recommend you first pull out your Spectrum Analyzer and check what is radiating from the innards first.Switching Power Supplies were of variable quality in that era and known for being noisy. And wooden case will give you nothing in the way of shielding. Do you really want a Hash Generator in your lab ?

  5

• IA

  @iamthejohn7064 · 11 years ago

  Dear Dave. Thanks for inspiring me. My recent ebay score (down to you) a &quot;faulty&quot; kenwood 5.1 receiver was just easily fixed by replacing the batteries in the remote. Happy days. Thanks again, John

  1

• KL

  @klightspeed · 11 years ago

  The 110V/220V jumper may be like the 110V/220V switch on older AT/ATX power supplies, which simply connects the centre-tap of the input capacitors to neutral when on the 110V setting. &nbsp;Edit: I see MTTT3000 beat me to it.

  4

• MR

  @MrHighvolt · 11 years ago

  laughed my ass off @ finding the spacers and screws :)

  1

• JA

  @jameslmorehead · 11 years ago

  Darn. &nbsp;I was hoping for more of a repair video. &nbsp;Even after taking 2 years of technical school, I learn more from you videos than I did there. &nbsp;You rock Dave!

• EL

  @ElectronSpark · 11 years ago

  The last time I won a &quot;untested&quot; bargain on ebay it was so fried on the inside I could smell it when I opened the box.

  2

• DA

  @darkguardian1314 · 11 years ago

  I enjoy these types of videos. <br>It&apos;s like CSI forensics trying to figure out what the prior owner did.