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| UNI-T UT61E Multimeter teardown photos. |
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| DiddlyJackSquat:
One of my mates blew up his UT61E that i sold him :palm: idk how he blew it exactly as details are scarce but he told me he blew it in current mode measuring a lipo in current, with the 10A ports and I told big fat bad idea... Now all readings are off. I'm getting it later from him so i might be able assess the damage |
| escape:
Speaking of blow ups, I had a major brain fart yesterday... I had my UT61E in "A" position, test leads connected to COM and 10A sockets. One test lead was connected to negative terminal of a fully charged 12V car battery, and then I attempted to touch the positive battery terminal with the other test lead. I only touched the positive terminal for a split second since I saw a spark at the positive terminal and heard the DMM beep. The DMM still measures voltage, but not current on the 10A socket. Hopefully I only blew the fuse and nothing else. Is BS1362 the correct replacement fuse? I have the Chinese version, not the German version. Thanks! |
| DiddlyJackSquat:
--- Quote from: escape on April 26, 2018, 12:56:29 pm ---Speaking of blow ups, I had a major brain fart yesterday... I had my UT61E in "A" position, test leads connected to COM and 10A sockets. One test lead was connected to negative terminal of a fully charged 12V car battery, and then I attempted to touch the positive battery terminal with the other test lead. I only touched the positive terminal for a split second since I saw a spark at the positive terminal and heard the DMM beep. The DMM still measures voltage, but not current on the 10A socket. Hopefully I only blew the fuse and nothing else. Is BS1362 the correct replacement fuse? I have the Chinese version, not the German version. Thanks! --- End quote --- Yes, BS1362 is the correct replacement fuse. |
| wasyoungonce:
To member "Sonny"....you PM'd me but I cannt reply as your post box is full.... So I'll post here and hope you notice as it was wrt to this thread..... Sorry for the late response...I've been in hospital for last 6 weeks...yet another spinal fusion (I've had quite a few lumber and cervical). This one worked very well but I've been spending some times on drugs and on the net...a dangerous combination..... :wtf: Anyway as for the PCB ver...I think I posted pics but am looking for them...or I'll tear it apart when I can. Pot I used was 2K , 785-9828 RS mrn. 785-9828 Its a 3296Z Bourns pot, 2K 10% +/-100PPM/C, so yeah could have done better here! I think it was what I could get at the time!. Another Problem is its centre legs is offset so I had a bit of bending to do prior to fitting... :palm: I'll do pics soon ummm it didn't have pads to vref IC! Oh yeah its kept cal ever since changing the pot! Brendan edit: Jeez Sonny your postbox is still full....I cannot PM back to you till ya empty ! And correct pot should have been Bourns 3296x pot as these pins are inline pins and its side adjust or 3296W for a top adj pot. I'm sure top adj will fit ok. The RS 3296X pot is RS number: 521-9912, mfgr mrn: 3296X-1-202LF, RS cost $4.30 ea. |
| sonny:
--- Quote from: wasyoungonce on June 01, 2018, 12:25:07 pm ---Jeez Sonny your postbox is still full....I cannot PM back to you till ya empty ! --- End quote --- Hello, Thanks for your post. My postbox is 340% full, I suppose Dave did another shrink to the accounts some time ago. I removed 15 messages and my inbox is still full. Do you know where are the requirements for the accounts, because I can't find them. I hope you are doing well now after your spinal fusion? I also noticed that it's not Bourns 3296Z, because of the pins alignment. Bourns 3296X seems to be the best choice. I measured the pot in my UT61E and it shows around 500 ohms. I think 3296X with 1k will be the perfect fit and it will provide better resolution for the calibration. Regards, |
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