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Test Equipment Help
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Author:  Suncalc [ 09 Oct 2014, 11:52 ]
Post subject:  Test Equipment Help

Ok folks, I need some help. I have recently acquired an AC millivolt meter; a Leader LMV-87A. It looks like this one here.
Attachment:
eqp-lmv-87a_lg.jpg

I need to know the specs of the meter so I need a manual or at least a schematic. You'll also notice that there is both an input (obviously) and an output. As such, I would like to know what are the transfer characteristics of the piece of equipment.

I need at least a schematic; but a schematic and a manual would be even better. Does anyone happen to have one stashed away? It would be a great help.

Thanks

Author:  RossD [ 22 Jan 2015, 12:46 ]
Post subject:  Re: Test Equipment Help

Does this help at all?:
http://www.radiomuseum.org/r/leader2_ac ... m_181.html

http://www.technicalaudio.com/pdf/Marti ... atalog.pdf

Author:  Suncalc [ 22 Jan 2015, 21:36 ]
Post subject:  Re: Test Equipment Help

Yes, somewhat. The 181 has a 1V output for "full scale" with a 600Ω output. I guess I can make some assumptions about the 87V and do some experimenting. I was just hoping that someone, somewhere had a schematic.

Thanks Ross.

Author:  gofar99 [ 22 Jan 2015, 22:48 ]
Post subject:  Re: Test Equipment Help

Hi, I don't have the info you need.....but a caution on use of them. It appears the one you have is set up (with the input and output terminals) like ones I have. I have both a B&K and Heath kit ones. When you measure across a component in circuit the ground terminals are not at ground level. They are floating. If something else is attached to it ..... you can almost always smoke something.

Good listening
Bruce

Author:  Geek [ 22 Jan 2015, 23:58 ]
Post subject:  Re: Test Equipment Help

gofar99 wrote:
When you measure across a component in circuit the ground terminals are not at ground level. They are floating. If something else is attached to it ..... you can almost always smoke something.


Ah! So that's what I did to my Heathkit one :blush:

Author:  gofar99 [ 23 Jan 2015, 08:27 ]
Post subject:  Re: Test Equipment Help

:eek:

Good listening
Bruce

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