Recent content by Dazz

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    Megger BM222 Please help with Fault diagnostics

    OK so for my fault, I am working on the hypothesis that 1kV is being generated, but not switched to the outputs. I have not probed the meter with an oscilloscope because 1kV will fry it. I have ordered an HV probe so I can poke around and see what is happening to the 1kV. The probe won't be...
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    Megger BM222 Please help with Fault diagnostics

    It looks exactly the same as mine. It also looks like a part has been cut out. OK does/did your 1000V test work? When I push the button, no relay click and the volt pointer on the LCD display is not shown. I wonder if the 1000V test was factory disabled for all BM222. I don't have a manual...
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    Megger BM222 Please help with Fault diagnostics

    I think my BM222 has been crippled. The attached image marks where I think a diode should be. The diode has been cut out. It is wired as an OR gate with the adjacent diode. I think it should be a 1N914 small signal diode. Can anyone confirm the missing component is a diode? Part number...
  4. 20250413_085725.jpg

    20250413_085725.jpg

    • Dazz
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  5. D

    Megger BM222 Please help with Fault diagnostics

    I can see there is a switch mode power supply in that area and around the relay. 1000Vdc is a lot for an electronic component to handle, so it makes sense a mosfet or similar is toast.
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    Megger BM222 Please help with Fault diagnostics

    OK I will give that a try. It's an oldy but a goody. It is old enough that I can probably still get components for it.
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    Megger BM222 Please help with Fault diagnostics

    Hi I own a Megger BM222 meter with a fault. It works on the 500V range, but there is no output on the 1000V range. I am trying to figure out what the fault is so I can fix it. On the 500V range, I can hear the internal relay clicking when the button is pushed. When I push the button on the...
  8. IMG_3817.JPG

    IMG_3817.JPG

    • Dazz
    • Media item
    • Comments: 0
    • Category: Electrical Videos
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    Exhibitor Power supply adaptor at NEC

    OK so I found this document called the eguide that details what you can and can't do with power at exhibition venues. It has some weird stuff in it, like you can't use a 4 way power strip drawing more than 500W but it makes no mention of 2,3 or 10 way power strips. I came up with a circuit...
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    Exhibitor Power supply adaptor at NEC

    Thanks for the link. I have asked NEC and been told that I can use a UK to NZ power strip, but with no more than 4 sockets, and they won't let me daisy chain them. No point in fighting them on this. I will just make up a junction box with the required number of power cables hard wired to a...
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    Exhibitor Power supply adaptor at NEC

    Volts/freq in NZ are the same as UK. From a technical point of view, putting a UK plug onto a NZ strip is fine but putting an NZ plug on a UK strip is unsafe. NEC standard supply options are up to 1kW from a single plug so a 13A plug fuse is overkill. And for that feeble amount of power they...
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    Exhibitor Power supply adaptor at NEC

    I am aiming to display 10-15 LED displays. I have looked at the option fitting UK plugs and using UK power strips. I'd like to avoid that path.
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    Exhibitor Power supply adaptor at NEC

    Hello I will be an exhibitor at an exhibition to be held at the NEC early next year. I am going to display multiple specialist outdoor LED displays. All of my displays are wired with NZ plugs. I know that I can buy and use a UK to NZ travel adapter at any airport in the UK so there must be...
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