Mtester

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Danny75
    New Member
    • Feb 2022
    • 6
    • Netherlands

    #1

    Mtester

    Hi all, new here and wanted to ask you guys if you can help me understand the device I got.
    A few years back I got this Mtester at a local shop but noticed that it sometimes seems to have some errors?
    Secondly, I would like to understand how this thing works when for example testing caps, if it needs some kind of calibration of some sort.

    The error it seems to give is that when I measure a (used) electrolytic cap and place the leads in socket 1 and 3 it sometimes displays that the cap has zero ESR (ESR reads 0.00) But when I place the same cap into lets say socket 1 and 2 it does display a certain ESR value. Have noticed this happening several times.

    I was at that shop and saw the man sell this device to someone and heard of its capabilities and got interested too. So I bought one, not knowing what it was exactly, I mean I did not know that i could be a copy of an original Mtester, still not sure though.

    The reason I ask is that I have been given some boxes filled with used and old stock caps and have already gone through some of it to see whats good and what not. Well, that is the thing, some were obvious as they gotten a capactiy of over three times or more of their original size. Others had such a immense large ESR that that was an indicator too as some similar ones (of the same value, type and brand) were still in spec.
    But is there a guideline to see when a cap of a certain value is probably out of spec and gone bad?
  • Danny75
    New Member
    • Feb 2022
    • 6
    • Netherlands

    #2
    Re: Mtester

    This is my little tester and some of the caps I got.
    Strangely enough some of the top tier brands were completely out of spec and some brands that I haven't heard of before like Tosin were perfect. But then again, it is not known where those caps were used and if they had a hard life or not.
    Some of you may not agree reusing used or salvaged caps but I think when they are in spec and still seem ok, why not
    Attached Files

    Comment

    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30950
      • Albion

      #3
      Re: Mtester

      it's a T4 component tester
      short the 3 pins and turn it on - it will go into cal mode
      have a 220nF polyester cap handy.
      Attached Files
      Last edited by stj; 02-24-2022, 01:08 PM.

      Comment

      • Danny75
        New Member
        • Feb 2022
        • 6
        • Netherlands

        #4
        Re: Mtester

        Thanks! I will have a look at that pdf

        Comment

        • Danny75
          New Member
          • Feb 2022
          • 6
          • Netherlands

          #5
          Re: Mtester

          Haven't gone through the calibration section yet but saw the T4 as you described it to be in the pdf. So if I understand it correctly, I have been sold a chinese clone instead of a legit version that I was told it was.

          Comment

          • digby1951
            Member
            • Jan 2017
            • 36
            • uk

            #6
            Re: Mtester

            yes........i have got the same one..but in kit form

            Comment

            • Danny75
              New Member
              • Feb 2022
              • 6
              • Netherlands

              #7
              Re: Mtester

              Think I overpaid and was fooled by this guy. Sold me some caps back then that were way out of spec too but said they were one of the best available.
              The tester was a kit too, had to assemble it and cost me shy of 30 euro's.

              Comment

              • volkswagenvan
                Volks
                • Mar 2009
                • 35
                • USA

                #8
                Re: Mtester

                These are all some variant of the original creators project.
                It has been improved or modified several times by everyone who wished to play with it!

                Comment

                • stj
                  Great Sage 齊天大聖
                  • Dec 2009
                  • 30950
                  • Albion

                  #9
                  Re: Mtester

                  damn, a T4 is worth about €7

                  Comment

                  • goodpsusearch
                    Badcaps Legend
                    • Oct 2009
                    • 2850
                    • Greece

                    #10
                    Re: Mtester

                    Originally posted by stj
                    damn, a T4 is worth about €7
                    Link please?

                    Comment

                    • stj
                      Great Sage 齊天大聖
                      • Dec 2009
                      • 30950
                      • Albion

                      #11
                      Re: Mtester

                      ebay or aliexpress.

                      it's the bottom of the range, the good ones have colour display and some are cased with a lithium battery and zener tester

                      Comment

                      Related Topics

                      Collapse

                      • BlueMonsoon
                        How to find the spec of this TEI-16760-01-08C transformer.
                        by BlueMonsoon
                        Hi, I want to replace a transformer in a motor cycle battery and float charger, but I can't find any info or the spec of the transformer, in order to start looking.
                        The number on the transformer is, TEI-16760-01-08C. The info on the charger is input, 220-240V 50hz 0.085A output 12V 0.8A.
                        Does anyone know where I could find a replacement for this? Thanks.
                        01-10-2022, 08:30 AM
                      • itachi
                        GPU Caps Out of Spec?
                        by itachi
                        My friend has this EVGA GTX770 GPU that, after 7 long years of use, is now starting to act up with artifacting and causing random black screens requiring a hard power down.

                        I decide to check the caps, since I've revived other GPUs by replacing bad ones. Physically they all look fine. These are all very low ESR caps, like aluminmum polymer <=10 mhom and tantalum polymer in the range of 20-30 mohm. They all test fine ESR wise.

                        They're grouped as follows:
                        4x 270u 16V Al-polymer
                        3x 100u 16V? tant-polymer
                        9x 330u 2.5V tant-polymer
                        4x 470u...
                        11-03-2021, 11:21 PM
                      • mikey5791
                        Tiny Tech ATX480W output power ticking
                        by mikey5791
                        Hi to all forum members,

                        ​​​​​​This psu (Tiny Tech model ATX 480W) had been installed in a very old Windows XP PC but recently i pulled it out as the pc cannot start. To test it, i jumped the green wire and black wire on the 24 pin connector. The psu fan jerk a bit but not spinning. I used my dmm to check dc voltage on output connector wire, the 5v red wire keeps ticking a bit at around dc1v....then drops and ticking again around 1v. It is the same situation with the 12v yellow wire.

                        Fyi, i desoldered the secondary side electrolytic cap those over 1000uf...
                        02-20-2025, 01:11 AM
                      • ziplock
                        Abit BE6-II motherboard
                        by ziplock
                        Greetings,

                        I have an Abit BE6-II motherboard that posts sporadically with the bare minimum components installed - CPU, RAM, PSU, and a Keyboard. I know it posts when the speaker beeps. Re-seating the components has no effect.

                        I thought the sporadic posting might be capacitor related. Upon inspection, non of the caps are bulged or leaking and they are all original. So, I pulled them ALL. While the ESR is OK, over half of them are leaking current between 1 and 2 mA. The biggest offenders are way out of spec, like a 1500uf / 6.3V measuring 2600uF and many of the 820uF caps...
                        04-20-2025, 02:09 PM
                      • JMD64
                        Trying to Install a dGPU into a HP zbook fury 15 g7 - Featurebyte lock shenanigans or Drop-In and go?
                        by JMD64
                        Greetings,

                        So I have acquired this Zbook fury 15 G7 (model 298B3AV with i5-10400H ) off Ebay, seller claimed it have a T2000 but suprise, the GPU port is wide empty so I am trying to upgrade it with one.

                        I got a second-hand T1000 daughter board which is claimed to be working, and I made sure everything were in order including other part I were supposed to install along with it, but the laptop can't detect the GPU and it's not even showing up in BIOS/Device manager.

                        I am not sure for this model if I can just slot in a GPU and it would straight up works, while...
                        03-23-2025, 10:18 PM
                      • Loading...
                      • No more items.
                      Working...