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Earth Leakage Clamp Meter - Great Tool!

Foffer
Maybe I'm behind the times and you've all known about these for years!


I've just started using a Megger DCM305E clamp meter which can measure current from 0.001mA to 100A, meaning that its prime application is measuring earth leakage.  Clamping around both meter tails together or around the cores of a specially made extension lead test rig quickly helps track down the offending item causing RCD/RCBO tripping.  This tool speeds up fault finding a great deal and causes minimum disruption in a working environment.


Just wanted to bring this tool to the attention of anyone who like me hadn't heard of it before!


Also, I don't know if there are similar tools made by other manufacturers.....
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    I recall the antenna isolation was 1000 pf or so of capacitance twice,



    That makes sense. I'm sure I found at least one with an actual transformer on the aerial socket - it was like a short co-ax extension lead with a very over-sized socket assembly that slotted into the compressed cardboard back cover. Thinking about it it possibly wasn't UHF - given these would have been old sets even in my youth perhaps more likely a 405-line VHF set (or there was at least one dual standard one). Luckily my parents didn't really understand the hazards of letting an 11-year old play with the EHT section of mains powered set with the back off....


       - Andy.
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  • 0

    I recall the antenna isolation was 1000 pf or so of capacitance twice,



    That makes sense. I'm sure I found at least one with an actual transformer on the aerial socket - it was like a short co-ax extension lead with a very over-sized socket assembly that slotted into the compressed cardboard back cover. Thinking about it it possibly wasn't UHF - given these would have been old sets even in my youth perhaps more likely a 405-line VHF set (or there was at least one dual standard one). Luckily my parents didn't really understand the hazards of letting an 11-year old play with the EHT section of mains powered set with the back off....


       - Andy.
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