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EEVblog 121GW Multimeter Issues

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DylanW:
Hi all,

I went to replace the batteries in my 131GW and discovered that two had leaked, badly corroding the terminals. I was wondering if there was a source I could purchase some replacement terminals from?

The serial number is 171202952 if that helps.

Cheers!

oliv3r:
Hey all,

I have an early 1.21GW with software version v2.05 (haven't checked if there's an update yet :p)

I also have a 2 year old fluke 115. I tried to measure some CT Coils with built in burden resistor, to check its resistance. This is where things got funny (due to my lack of understanding). I would have expected to get the value of the copper windings, in parallel to the resistor. Not sure _what_ I'm getting though; as I see a about 8 or 9 ohms, that are constantly changing on the display (walking up, walking down) over 1 or 2 ohms or so on the 1.121 whereas the fluke (with much less digits mind you) was showing something like 20 ohms. Pretty big difference I would think. Could this be caused by _how_ things are measured? Is the coil of influence? I can imagine that the fact that we are measuring ferrite wound coils, an inductor in fact, could throw things off as the inductor 'buffers' energy, and releases it again?

toomuchesr:
Hi Dave!

Mine has the "cracked plug" problem as well. Serial starts with 1808071__

I would be happy to know which replacement part I could source and where (I'm in the EU).

Thank you!

BR, Hendrik

J-R:
My 121GW does generate a few changing voltages during resistance auto-ranging.  I think it was 0.2V, 1V and 2V at least.  But otherwise it's pretty stable once in a specific range as best I could tell on my scope without spending too much time to block out noise.

I wonder if the coil is picking up some EMI?  Can you shield it to see if the behavior changes?

toomuchesr:

--- Quote from: toomuchesr on December 02, 2022, 11:08:11 am ---Hi Dave!

Mine has the "cracked plug" problem as well. Serial starts with 1808071__

I would be happy to know which replacement part I could source and where (I'm in the EU).

Thank you!

BR, Hendrik

--- End quote ---

🥺 Dave? Or anyone else who knows which part to source?

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