Re: [volt-nuts] Keithley 2182A

[Russ Ramirez]

Thanks. I did not realize that the CPLD was for ADC control until I re-read
Illya's article again, and I then realized with the parts complement
present that the "ADC" must be an integrating type. Next time I crack it
open, I'll have more to check.

Russ

On Sun, Jun 26, 2016 at 3:44 PM, Todd Micallef  wrote:

> The repair was performed last November and my memory is bad, too many
> projects since then. The two defective parts were the TF-245 and U626.
>
> My symptoms were noisy readings across all ranges. I could not get them to
> settle down even with the input shorted. I measured the TF-245 in-circuit
> to see if anything was too far out to be in spec. I was certain that the
> 30K resistor between 5-11 was open, so I removed it and measured. There was
> also another open 90K resistor between 7-8.
>
> I also had to trace an input signal through the meter and it led to the
> resistor array. I will try and find the actual in-circuit measurements
> before the part was replaced.
>
> I
>
>
> Todd
>
> On Sun, Jun 26, 2016 at 4:23 PM, Russ Ramirez 
> wrote:
>
> > Looking forward to your notes Todd. A bit more info on the repair.
> >
> > DCV1 is OK except for the 10 V range. A test voltage input of 100 mV
> > appears on the input side of Q665 fine, but not on the output side in the
> > 10 V range, however a DMM measurement is solid in the other applicable
> > ranges. So this issue does seem to be completely isolated to the 10 V
> > range.
> >
> > DCV2 input is fine through the path to the ADC (TP652) in all ranges, but
> > the unit is not making a stable measurement. For example, a 9 V input
> reads
> > between 8.8 V and 9.2 V on the 10 V scale. The same 9 V input to DCV1
> also
> > looks good up to TP652, on the 100 V range since 10 v is out it, and it
> > reads a stable 9.002 V at that TP. Without a schematic, it will take some
> > time to determine what is different after the TP652 point - maybe there
> are
> > in fact 2 ADCs, but it's not obvious either way.
> >
> > Russ
> >
> > On Sun, Jun 26, 2016 at 11:16 AM, Todd Micallef 
> > wrote:
> >
> > > I have to review my notes, but I know of the two bad parts that were
> > > found, one was the TF-245. I happened to have a spare on hand. I will
> > look
> > > through any notes to get the other part number.
> > >
> > > Todd
> > >
> > > Sent from my iPad
> > >
> > > > On Jun 26, 2016, at 10:09, Russ Ramirez 
> > wrote:
> > > >
> > > > Thanks Illya - very nice piece of work!
> > > >
> > > > Russ
> > > >
> > > >> On Sun, Jun 26, 2016 at 5:27 AM, Illya Tsemenko 
> > > wrote:
> > > >>
> > > >> If you looking into repair or internals detail of 2182, this draft
> > > article
> > > >> may help: https://xdevs.com/fix/kei2182/
> > > >> Keithley stopped releasing schematics and detailed information since
> > > >> -series instruments due to IP issues.
> > > >>
> > > >> 26/06/16 18:08, Brian Smith пишет:
> > > >>
> > > >> Hello Russ
> > > >>>
> > > >>> It appears that there are neither a service manual nor a schematic
> > > >>> available anywhere.
> > > >>>
> > > >>> My educated guess is that this is because the 2182A is a current
> > model
> > > >>> instrument. The newest production model keithley gear does not have
> > > >>> associated service manuals nor schematics published. These appear
> to
> > be
> > > >>> treated as trade secrets.
> > > >>>
> > > >>> You can have your 2182A serviced by Keithley if it is in need of
> > > repair.
> > > >>>
> > > >>> I had my model 2000 DMM that I bought from eBay serviced by
> Keihtley
> > > for
> > > >>> $560. They replaced the motherboard bringing the DMM up to brand
> new
> > > >>> condition. I asked for and received the calibration data with the
> > > returned
> > > >>> instrument.
> > > >>>
> > > >>> best regards,
> > > >>>
> > > >>> Brian
> > > >>>
> > > >>>
> > > >>>
> > > >>> On Fri, Jun 24, 2016 at 10:38 PM, Russ Ramirez <
> > russ.rami...@gmail.com
> > > >
> > > >>> wrote:
> > > >>>
> > > >>> The service manual, or a schematic. I asked just in case someone
> had
> > > one
> > >  from an original purchase. I also asked a friend who worked for
> > > Keithley,
> > >  but apparently no one he knew had one either. Hard to find.
> > > 
> > >  Russ
> > >  On Jun 24, 2016 6:26 PM, "Brian Smith"  >
> > >  wrote:
> > > 
> > >  What document do you need? Keithley publishes most needed docs.
> > > > On Jun 24, 2016 12:59 PM, "Russ Ramirez"  >
> > > > wrote:
> > > >
> > > > Just wondering if any of you might have a PDF of the subject
> > > >>
> > > > Nanovoltmeter?
> > > >
> > > >> TIA
> > > >>
> > > >> Russ
> > > >> ___
> > > >> volt-nuts mailing list -- volt-nuts@febo.com
> > > >> To unsubscribe, go to
> > > >> 

Re: [volt-nuts] Keithley 2182A

[Todd Micallef]

The repair was performed last November and my memory is bad, too many
projects since then. The two defective parts were the TF-245 and U626.

My symptoms were noisy readings across all ranges. I could not get them to
settle down even with the input shorted. I measured the TF-245 in-circuit
to see if anything was too far out to be in spec. I was certain that the
30K resistor between 5-11 was open, so I removed it and measured. There was
also another open 90K resistor between 7-8.

I also had to trace an input signal through the meter and it led to the
resistor array. I will try and find the actual in-circuit measurements
before the part was replaced.

I


Todd

On Sun, Jun 26, 2016 at 4:23 PM, Russ Ramirez 
wrote:

> Looking forward to your notes Todd. A bit more info on the repair.
>
> DCV1 is OK except for the 10 V range. A test voltage input of 100 mV
> appears on the input side of Q665 fine, but not on the output side in the
> 10 V range, however a DMM measurement is solid in the other applicable
> ranges. So this issue does seem to be completely isolated to the 10 V
> range.
>
> DCV2 input is fine through the path to the ADC (TP652) in all ranges, but
> the unit is not making a stable measurement. For example, a 9 V input reads
> between 8.8 V and 9.2 V on the 10 V scale. The same 9 V input to DCV1 also
> looks good up to TP652, on the 100 V range since 10 v is out it, and it
> reads a stable 9.002 V at that TP. Without a schematic, it will take some
> time to determine what is different after the TP652 point - maybe there are
> in fact 2 ADCs, but it's not obvious either way.
>
> Russ
>
> On Sun, Jun 26, 2016 at 11:16 AM, Todd Micallef 
> wrote:
>
> > I have to review my notes, but I know of the two bad parts that were
> > found, one was the TF-245. I happened to have a spare on hand. I will
> look
> > through any notes to get the other part number.
> >
> > Todd
> >
> > Sent from my iPad
> >
> > > On Jun 26, 2016, at 10:09, Russ Ramirez 
> wrote:
> > >
> > > Thanks Illya - very nice piece of work!
> > >
> > > Russ
> > >
> > >> On Sun, Jun 26, 2016 at 5:27 AM, Illya Tsemenko 
> > wrote:
> > >>
> > >> If you looking into repair or internals detail of 2182, this draft
> > article
> > >> may help: https://xdevs.com/fix/kei2182/
> > >> Keithley stopped releasing schematics and detailed information since
> > >> -series instruments due to IP issues.
> > >>
> > >> 26/06/16 18:08, Brian Smith пишет:
> > >>
> > >> Hello Russ
> > >>>
> > >>> It appears that there are neither a service manual nor a schematic
> > >>> available anywhere.
> > >>>
> > >>> My educated guess is that this is because the 2182A is a current
> model
> > >>> instrument. The newest production model keithley gear does not have
> > >>> associated service manuals nor schematics published. These appear to
> be
> > >>> treated as trade secrets.
> > >>>
> > >>> You can have your 2182A serviced by Keithley if it is in need of
> > repair.
> > >>>
> > >>> I had my model 2000 DMM that I bought from eBay serviced by Keihtley
> > for
> > >>> $560. They replaced the motherboard bringing the DMM up to brand new
> > >>> condition. I asked for and received the calibration data with the
> > returned
> > >>> instrument.
> > >>>
> > >>> best regards,
> > >>>
> > >>> Brian
> > >>>
> > >>>
> > >>>
> > >>> On Fri, Jun 24, 2016 at 10:38 PM, Russ Ramirez <
> russ.rami...@gmail.com
> > >
> > >>> wrote:
> > >>>
> > >>> The service manual, or a schematic. I asked just in case someone had
> > one
> >  from an original purchase. I also asked a friend who worked for
> > Keithley,
> >  but apparently no one he knew had one either. Hard to find.
> > 
> >  Russ
> >  On Jun 24, 2016 6:26 PM, "Brian Smith" 
> >  wrote:
> > 
> >  What document do you need? Keithley publishes most needed docs.
> > > On Jun 24, 2016 12:59 PM, "Russ Ramirez" 
> > > wrote:
> > >
> > > Just wondering if any of you might have a PDF of the subject
> > >>
> > > Nanovoltmeter?
> > >
> > >> TIA
> > >>
> > >> Russ
> > >> ___
> > >> volt-nuts mailing list -- volt-nuts@febo.com
> > >> To unsubscribe, go to
> > >> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> > >> and follow the instructions there.
> > >>
> > >> ___
> > > volt-nuts mailing list -- volt-nuts@febo.com
> > > To unsubscribe, go to
> > > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> > > and follow the instructions there.
> > >
> > > ___
> >  volt-nuts mailing list -- volt-nuts@febo.com
> >  To unsubscribe, go to
> >  https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> >  and follow the instructions there.
> > 

Re: [volt-nuts] Keithley 2182A

[Russ Ramirez]

Looking forward to your notes Todd. A bit more info on the repair.

DCV1 is OK except for the 10 V range. A test voltage input of 100 mV
appears on the input side of Q665 fine, but not on the output side in the
10 V range, however a DMM measurement is solid in the other applicable
ranges. So this issue does seem to be completely isolated to the 10 V range.

DCV2 input is fine through the path to the ADC (TP652) in all ranges, but
the unit is not making a stable measurement. For example, a 9 V input reads
between 8.8 V and 9.2 V on the 10 V scale. The same 9 V input to DCV1 also
looks good up to TP652, on the 100 V range since 10 v is out it, and it
reads a stable 9.002 V at that TP. Without a schematic, it will take some
time to determine what is different after the TP652 point - maybe there are
in fact 2 ADCs, but it's not obvious either way.

Russ

On Sun, Jun 26, 2016 at 11:16 AM, Todd Micallef  wrote:

> I have to review my notes, but I know of the two bad parts that were
> found, one was the TF-245. I happened to have a spare on hand. I will look
> through any notes to get the other part number.
>
> Todd
>
> Sent from my iPad
>
> > On Jun 26, 2016, at 10:09, Russ Ramirez  wrote:
> >
> > Thanks Illya - very nice piece of work!
> >
> > Russ
> >
> >> On Sun, Jun 26, 2016 at 5:27 AM, Illya Tsemenko 
> wrote:
> >>
> >> If you looking into repair or internals detail of 2182, this draft
> article
> >> may help: https://xdevs.com/fix/kei2182/
> >> Keithley stopped releasing schematics and detailed information since
> >> -series instruments due to IP issues.
> >>
> >> 26/06/16 18:08, Brian Smith пишет:
> >>
> >> Hello Russ
> >>>
> >>> It appears that there are neither a service manual nor a schematic
> >>> available anywhere.
> >>>
> >>> My educated guess is that this is because the 2182A is a current model
> >>> instrument. The newest production model keithley gear does not have
> >>> associated service manuals nor schematics published. These appear to be
> >>> treated as trade secrets.
> >>>
> >>> You can have your 2182A serviced by Keithley if it is in need of
> repair.
> >>>
> >>> I had my model 2000 DMM that I bought from eBay serviced by Keihtley
> for
> >>> $560. They replaced the motherboard bringing the DMM up to brand new
> >>> condition. I asked for and received the calibration data with the
> returned
> >>> instrument.
> >>>
> >>> best regards,
> >>>
> >>> Brian
> >>>
> >>>
> >>>
> >>> On Fri, Jun 24, 2016 at 10:38 PM, Russ Ramirez  >
> >>> wrote:
> >>>
> >>> The service manual, or a schematic. I asked just in case someone had
> one
>  from an original purchase. I also asked a friend who worked for
> Keithley,
>  but apparently no one he knew had one either. Hard to find.
> 
>  Russ
>  On Jun 24, 2016 6:26 PM, "Brian Smith" 
>  wrote:
> 
>  What document do you need? Keithley publishes most needed docs.
> > On Jun 24, 2016 12:59 PM, "Russ Ramirez" 
> > wrote:
> >
> > Just wondering if any of you might have a PDF of the subject
> >>
> > Nanovoltmeter?
> >
> >> TIA
> >>
> >> Russ
> >> ___
> >> volt-nuts mailing list -- volt-nuts@febo.com
> >> To unsubscribe, go to
> >> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> >> and follow the instructions there.
> >>
> >> ___
> > volt-nuts mailing list -- volt-nuts@febo.com
> > To unsubscribe, go to
> > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> > and follow the instructions there.
> >
> > ___
>  volt-nuts mailing list -- volt-nuts@febo.com
>  To unsubscribe, go to
>  https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
>  and follow the instructions there.
> 
>  ___
> >>> volt-nuts mailing list -- volt-nuts@febo.com
> >>> To unsubscribe, go to
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> >>> and follow the instructions there.
> >>>
> >>
> >>
> >>
> >> ___
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> >> To unsubscribe, go to
> >> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> >> and follow the instructions there.
> >>
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> > To unsubscribe, go to
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> > and follow the instructions there.
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> and follow the instructions there.
>

Re: [volt-nuts] Keithley 2182A

[Todd Micallef]

I have to review my notes, but I know of the two bad parts that were found, one 
was the TF-245. I happened to have a spare on hand. I will look through any 
notes to get the other part number.

Todd

Sent from my iPad

> On Jun 26, 2016, at 10:09, Russ Ramirez  wrote:
> 
> Thanks Illya - very nice piece of work!
> 
> Russ
> 
>> On Sun, Jun 26, 2016 at 5:27 AM, Illya Tsemenko  wrote:
>> 
>> If you looking into repair or internals detail of 2182, this draft article
>> may help: https://xdevs.com/fix/kei2182/
>> Keithley stopped releasing schematics and detailed information since
>> -series instruments due to IP issues.
>> 
>> 26/06/16 18:08, Brian Smith пишет:
>> 
>> Hello Russ
>>> 
>>> It appears that there are neither a service manual nor a schematic
>>> available anywhere.
>>> 
>>> My educated guess is that this is because the 2182A is a current model
>>> instrument. The newest production model keithley gear does not have
>>> associated service manuals nor schematics published. These appear to be
>>> treated as trade secrets.
>>> 
>>> You can have your 2182A serviced by Keithley if it is in need of repair.
>>> 
>>> I had my model 2000 DMM that I bought from eBay serviced by Keihtley for
>>> $560. They replaced the motherboard bringing the DMM up to brand new
>>> condition. I asked for and received the calibration data with the returned
>>> instrument.
>>> 
>>> best regards,
>>> 
>>> Brian
>>> 
>>> 
>>> 
>>> On Fri, Jun 24, 2016 at 10:38 PM, Russ Ramirez 
>>> wrote:
>>> 
>>> The service manual, or a schematic. I asked just in case someone had one
 from an original purchase. I also asked a friend who worked for Keithley,
 but apparently no one he knew had one either. Hard to find.
 
 Russ
 On Jun 24, 2016 6:26 PM, "Brian Smith" 
 wrote:
 
 What document do you need? Keithley publishes most needed docs.
> On Jun 24, 2016 12:59 PM, "Russ Ramirez" 
> wrote:
> 
> Just wondering if any of you might have a PDF of the subject
>> 
> Nanovoltmeter?
> 
>> TIA
>> 
>> Russ
>> ___
>> volt-nuts mailing list -- volt-nuts@febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
>> and follow the instructions there.
>> 
>> ___
> volt-nuts mailing list -- volt-nuts@febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.
> 
> ___
 volt-nuts mailing list -- volt-nuts@febo.com
 To unsubscribe, go to
 https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
 and follow the instructions there.
 
 ___
>>> volt-nuts mailing list -- volt-nuts@febo.com
>>> To unsubscribe, go to
>>> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
>>> and follow the instructions there.
>>> 
>> 
>> 
>> 
>> ___
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>> To unsubscribe, go to
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>> and follow the instructions there.
>> 
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Re: [volt-nuts] Keithley 2182A

[Russ Ramirez]

Thanks Illya - very nice piece of work!

Russ

On Sun, Jun 26, 2016 at 5:27 AM, Illya Tsemenko  wrote:

> If you looking into repair or internals detail of 2182, this draft article
> may help: https://xdevs.com/fix/kei2182/
> Keithley stopped releasing schematics and detailed information since
> -series instruments due to IP issues.
>
> 26/06/16 18:08, Brian Smith пишет:
>
> Hello Russ
>>
>> It appears that there are neither a service manual nor a schematic
>> available anywhere.
>>
>> My educated guess is that this is because the 2182A is a current model
>> instrument. The newest production model keithley gear does not have
>> associated service manuals nor schematics published. These appear to be
>> treated as trade secrets.
>>
>> You can have your 2182A serviced by Keithley if it is in need of repair.
>>
>> I had my model 2000 DMM that I bought from eBay serviced by Keihtley for
>> $560. They replaced the motherboard bringing the DMM up to brand new
>> condition. I asked for and received the calibration data with the returned
>> instrument.
>>
>> best regards,
>>
>> Brian
>>
>>
>>
>> On Fri, Jun 24, 2016 at 10:38 PM, Russ Ramirez 
>> wrote:
>>
>> The service manual, or a schematic. I asked just in case someone had one
>>> from an original purchase. I also asked a friend who worked for Keithley,
>>> but apparently no one he knew had one either. Hard to find.
>>>
>>> Russ
>>> On Jun 24, 2016 6:26 PM, "Brian Smith" 
>>> wrote:
>>>
>>> What document do you need? Keithley publishes most needed docs.
 On Jun 24, 2016 12:59 PM, "Russ Ramirez" 
 wrote:

 Just wondering if any of you might have a PDF of the subject
>
 Nanovoltmeter?

> TIA
>
> Russ
> ___
> volt-nuts mailing list -- volt-nuts@febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.
>
> ___
 volt-nuts mailing list -- volt-nuts@febo.com
 To unsubscribe, go to
 https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
 and follow the instructions there.

 ___
>>> volt-nuts mailing list -- volt-nuts@febo.com
>>> To unsubscribe, go to
>>> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
>>> and follow the instructions there.
>>>
>>> ___
>> volt-nuts mailing list -- volt-nuts@febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
>> and follow the instructions there.
>>
>
>
>
> ___
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Re: [volt-nuts] Keithley 2182A

[Brian Smith]

Hello Russ

It appears that there are neither a service manual nor a schematic
available anywhere.

My educated guess is that this is because the 2182A is a current model
instrument. The newest production model keithley gear does not have
associated service manuals nor schematics published. These appear to be
treated as trade secrets.

You can have your 2182A serviced by Keithley if it is in need of repair.

I had my model 2000 DMM that I bought from eBay serviced by Keihtley for
$560. They replaced the motherboard bringing the DMM up to brand new
condition. I asked for and received the calibration data with the returned
instrument.

best regards,

Brian



On Fri, Jun 24, 2016 at 10:38 PM, Russ Ramirez 
wrote:

> The service manual, or a schematic. I asked just in case someone had one
> from an original purchase. I also asked a friend who worked for Keithley,
> but apparently no one he knew had one either. Hard to find.
>
> Russ
> On Jun 24, 2016 6:26 PM, "Brian Smith"  wrote:
>
> > What document do you need? Keithley publishes most needed docs.
> > On Jun 24, 2016 12:59 PM, "Russ Ramirez"  wrote:
> >
> > > Just wondering if any of you might have a PDF of the subject
> > Nanovoltmeter?
> > > TIA
> > >
> > > Russ
> > > ___
> > > volt-nuts mailing list -- volt-nuts@febo.com
> > > To unsubscribe, go to
> > > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> > > and follow the instructions there.
> > >
> > ___
> > volt-nuts mailing list -- volt-nuts@febo.com
> > To unsubscribe, go to
> > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> > and follow the instructions there.
> >
> ___
> volt-nuts mailing list -- volt-nuts@febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.
>
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Re: [volt-nuts] Keithley 2182A

[Illya Tsemenko]

If you looking into repair or internals detail of 2182, this draft 
article may help: https://xdevs.com/fix/kei2182/
Keithley stopped releasing schematics and detailed information since 
-series instruments due to IP issues.


26/06/16 18:08, Brian Smith пишет:

Hello Russ

It appears that there are neither a service manual nor a schematic
available anywhere.

My educated guess is that this is because the 2182A is a current model
instrument. The newest production model keithley gear does not have
associated service manuals nor schematics published. These appear to be
treated as trade secrets.

You can have your 2182A serviced by Keithley if it is in need of repair.

I had my model 2000 DMM that I bought from eBay serviced by Keihtley for
$560. They replaced the motherboard bringing the DMM up to brand new
condition. I asked for and received the calibration data with the returned
instrument.

best regards,

Brian



On Fri, Jun 24, 2016 at 10:38 PM, Russ Ramirez 
wrote:


The service manual, or a schematic. I asked just in case someone had one
from an original purchase. I also asked a friend who worked for Keithley,
but apparently no one he knew had one either. Hard to find.

Russ
On Jun 24, 2016 6:26 PM, "Brian Smith"  wrote:


What document do you need? Keithley publishes most needed docs.
On Jun 24, 2016 12:59 PM, "Russ Ramirez"  wrote:


Just wondering if any of you might have a PDF of the subject

Nanovoltmeter?

TIA

Russ
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Re: [volt-nuts] Keithley 2182A

[Brian Smith]

Hello Russ

It appears that there are neither a service manual nor a schematic
available anywhere.

My educated guess is that this is because the 2182A is a current model
instrument. The newest production model keithley gear does not have
associated service manuals nor schematics published. These appear to be
treated as trade secrets.

You can have your 2182A serviced by Keithley if it is in need of repair.

I had my model 2000 DMM that I bought from eBay serviced by Keihtley for
$560. They replaced the motherboard bringing the DMM up to brand new
condition. I asked for and received the calibration data with the returned
instrument.

best regards,

Brian



On Fri, Jun 24, 2016 at 10:38 PM, Russ Ramirez 
wrote:

> The service manual, or a schematic. I asked just in case someone had one
> from an original purchase. I also asked a friend who worked for Keithley,
> but apparently no one he knew had one either. Hard to find.
>
> Russ
> On Jun 24, 2016 6:26 PM, "Brian Smith"  wrote:
>
> > What document do you need? Keithley publishes most needed docs.
> > On Jun 24, 2016 12:59 PM, "Russ Ramirez"  wrote:
> >
> > > Just wondering if any of you might have a PDF of the subject
> > Nanovoltmeter?
> > > TIA
> > >
> > > Russ
> > > ___
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Re: [volt-nuts] Keithley 2182A

[Brian Smith]

What document do you need? Keithley publishes most needed docs.
On Jun 24, 2016 12:59 PM, "Russ Ramirez"  wrote:

> Just wondering if any of you might have a PDF of the subject Nanovoltmeter?
> TIA
>
> Russ
> ___
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>
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