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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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    (a truly dual-purpose appliance, you can't watch the match on a fan heater).




    Not the only dual purpose device from the era, I do recall that when the Lab heating was not quite up to the winter temperatures (sawtooth corrugated roofing and single glazing have their limits) the fix was to come in and switch on the large Tek scopes and a few of the valved Marconi signal generators, just showing Lissajoule figures - made the lab look busier than it was and took the chill off quite quickly, with a distinctive  smell of warm varnish and wax.  You could always say you were letting it warm up and stabilise for later in the day if anyone asked. The modern semiconductor stuff is much less effective.


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    (a truly dual-purpose appliance, you can't watch the match on a fan heater).




    Not the only dual purpose device from the era, I do recall that when the Lab heating was not quite up to the winter temperatures (sawtooth corrugated roofing and single glazing have their limits) the fix was to come in and switch on the large Tek scopes and a few of the valved Marconi signal generators, just showing Lissajoule figures - made the lab look busier than it was and took the chill off quite quickly, with a distinctive  smell of warm varnish and wax.  You could always say you were letting it warm up and stabilise for later in the day if anyone asked. The modern semiconductor stuff is much less effective.


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