M@
Marv @ Home
Fri, Aug 2, 2013 9:27 PM
Does anyone know anything about this calibrator?
Access to schematics or users manual?
If you've no documentation on the 320, any 300 series calibrator from
Rotek would help. If you have no documentation but know or worked
with them, that would help; What were their quirks? Their basic
specs? Do you have an overview of what circuit methods they used to
provide stable output? Did they use any unobtanium?
Thanks a bunch.
P.S. I emailed and contacted Rotek without success. All attempts to
email them bounce back, so I'm not sure they are still around despite
having a website up, but frozen dated 2002.
Please reply privately to my email, as this may be considered off
topic for some listmembers.
Sincerely,
Marv
Philadelphia, PA
Does anyone know anything about this calibrator?
Access to schematics or users manual?
If you've no documentation on the 320, any 300 series calibrator from
Rotek would help. If you have no documentation but know or worked
with them, that would help; What were their quirks? Their basic
specs? Do you have an overview of what circuit methods they used to
provide stable output? Did they use any unobtanium?
Thanks a bunch.
P.S. I emailed and contacted Rotek without success. All attempts to
email them bounce back, so I'm not sure they are still around despite
having a website up, but frozen dated 2002.
Please reply privately to my email, as this may be considered off
topic for some listmembers.
Sincerely,
Marv
Philadelphia, PA
JF
J. Forster
Fri, Aug 2, 2013 9:49 PM
I'm not certain it's the same model, but the one I'm familiar with was in
a Wamco (formica) case, maybe 10" x 12" x 8" with some colored binding
posts. They has a little glass 'thermal convertor' about the size of a
pecan. The rest of the box was precision resistors and high quality
(Shallcross ?) switches.
There were a bunch of part-built ones surplused in the Boston area in the
late 1970s. Internally they had plexi panels with 0.1% and .01% resistors,
in decade values as I remember.
If that's the puppy, I know nothing more. I still have some of the parts
put away somewhere. I never had any paperwork AFAIK. They may have been
affiliated with Weston.
If this is not the puppy, never mind. :)
-John
=============
Does anyone know anything about this calibrator?
Access to schematics or users manual?
If you've no documentation on the 320, any 300 series calibrator from
Rotek would help. If you have no documentation but know or worked
with them, that would help; What were their quirks? Their basic
specs? Do you have an overview of what circuit methods they used to
provide stable output? Did they use any unobtanium?
Thanks a bunch.
P.S. I emailed and contacted Rotek without success. All attempts to
email them bounce back, so I'm not sure they are still around despite
having a website up, but frozen dated 2002.
Please reply privately to my email, as this may be considered off
topic for some listmembers.
Sincerely,
Marv
Philadelphia, PA
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.
I'm not certain it's the same model, but the one I'm familiar with was in
a Wamco (formica) case, maybe 10" x 12" x 8" with some colored binding
posts. They has a little glass 'thermal convertor' about the size of a
pecan. The rest of the box was precision resistors and high quality
(Shallcross ?) switches.
There were a bunch of part-built ones surplused in the Boston area in the
late 1970s. Internally they had plexi panels with 0.1% and .01% resistors,
in decade values as I remember.
If that's the puppy, I know nothing more. I still have some of the parts
put away somewhere. I never had any paperwork AFAIK. They may have been
affiliated with Weston.
If this is not the puppy, never mind. :)
-John
=============
> Does anyone know anything about this calibrator?
>
> Access to schematics or users manual?
>
> If you've no documentation on the 320, any 300 series calibrator from
> Rotek would help. If you have no documentation but know or worked
> with them, that would help; What were their quirks? Their basic
> specs? Do you have an overview of what circuit methods they used to
> provide stable output? Did they use any unobtanium?
>
> Thanks a bunch.
>
> P.S. I emailed and contacted Rotek without success. All attempts to
> email them bounce back, so I'm not sure they are still around despite
> having a website up, but frozen dated 2002.
>
> Please reply privately to my email, as this may be considered off
> topic for some listmembers.
>
>
>
>
>
>
>
>
>
> Sincerely,
>
>
>
> Marv
> Philadelphia, PA
>
> _______________________________________________
> 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.
>
>
M@
Marv @ Home
Tue, Aug 6, 2013 1:49 PM
Thanks John, appreciated, not sure if they are similar as the unit is
in transit and not in my possession, its a boat anchor. Will let
you'all know the status after a thorough evaluation. Still doing
'discovery' and getting as much info as possible.
From a volt nuts perspective, for other readers, calibrators may
have very stable references in single digit ppm, and maybe an option
instead of build your own reference, plus they may come with built in
KV dividers, precision AC oscillators etc., that alone maybe worth
the whole kaboodle. Some are dirt cheap, as low as free except
postage, others not so.
At 05:49 PM 8/2/2013, J. Forster wrote:
I'm not certain it's the same model, but the one I'm familiar with was in
a Wamco (formica) case, maybe 10" x 12" x 8" with some colored binding
posts. They has a little glass 'thermal convertor' about the size of a
pecan. The rest of the box was precision resistors and high quality
(Shallcross ?) switches.
There were a bunch of part-built ones surplused in the Boston area in the
late 1970s. Internally they had plexi panels with 0.1% and .01% resistors,
in decade values as I remember.
If that's the puppy, I know nothing more. I still have some of the parts
put away somewhere. I never had any paperwork AFAIK. They may have been
affiliated with Weston.
If this is not the puppy, never mind. :)
-John
=============
Sincerely,
Marv
Philadelphia, PA
Thanks John, appreciated, not sure if they are similar as the unit is
in transit and not in my possession, its a boat anchor. Will let
you'all know the status after a thorough evaluation. Still doing
'discovery' and getting as much info as possible.
From a volt nuts perspective, for other readers, calibrators may
have very stable references in single digit ppm, and maybe an option
instead of build your own reference, plus they may come with built in
KV dividers, precision AC oscillators etc., that alone maybe worth
the whole kaboodle. Some are dirt cheap, as low as free except
postage, others not so.
At 05:49 PM 8/2/2013, J. Forster wrote:
>I'm not certain it's the same model, but the one I'm familiar with was in
>a Wamco (formica) case, maybe 10" x 12" x 8" with some colored binding
>posts. They has a little glass 'thermal convertor' about the size of a
>pecan. The rest of the box was precision resistors and high quality
>(Shallcross ?) switches.
>
>There were a bunch of part-built ones surplused in the Boston area in the
>late 1970s. Internally they had plexi panels with 0.1% and .01% resistors,
>in decade values as I remember.
>
>If that's the puppy, I know nothing more. I still have some of the parts
>put away somewhere. I never had any paperwork AFAIK. They may have been
>affiliated with Weston.
>
>If this is not the puppy, never mind. :)
>
>-John
>
>=============
Sincerely,
Marv
Philadelphia, PA
JF
J. Forster
Tue, Aug 6, 2013 2:20 PM
If it's the thing I'm thinking of, there are no standards or references in
the box. It's sole function is to compare the heating effect of an AC and
a DC voltage.
-John
==============
Thanks John, appreciated, not sure if they are similar as the unit is
in transit and not in my possession, its a boat anchor. Will let
you'all know the status after a thorough evaluation. Still doing
'discovery' and getting as much info as possible.
From a volt nuts perspective, for other readers, calibrators may
have very stable references in single digit ppm, and maybe an option
instead of build your own reference, plus they may come with built in
KV dividers, precision AC oscillators etc., that alone maybe worth
the whole kaboodle. Some are dirt cheap, as low as free except
postage, others not so.
At 05:49 PM 8/2/2013, J. Forster wrote:
I'm not certain it's the same model, but the one I'm familiar with was in
a Wamco (formica) case, maybe 10" x 12" x 8" with some colored binding
posts. They has a little glass 'thermal convertor' about the size of a
pecan. The rest of the box was precision resistors and high quality
(Shallcross ?) switches.
There were a bunch of part-built ones surplused in the Boston area in the
late 1970s. Internally they had plexi panels with 0.1% and .01%
resistors,
in decade values as I remember.
If that's the puppy, I know nothing more. I still have some of the parts
put away somewhere. I never had any paperwork AFAIK. They may have been
affiliated with Weston.
If this is not the puppy, never mind. :)
-John
=============
Sincerely,
Marv
Philadelphia, PA
If it's the thing I'm thinking of, there are no standards or references in
the box. It's sole function is to compare the heating effect of an AC and
a DC voltage.
-John
==============
> Thanks John, appreciated, not sure if they are similar as the unit is
> in transit and not in my possession, its a boat anchor. Will let
> you'all know the status after a thorough evaluation. Still doing
> 'discovery' and getting as much info as possible.
>
> From a volt nuts perspective, for other readers, calibrators may
> have very stable references in single digit ppm, and maybe an option
> instead of build your own reference, plus they may come with built in
> KV dividers, precision AC oscillators etc., that alone maybe worth
> the whole kaboodle. Some are dirt cheap, as low as free except
> postage, others not so.
>
>
> At 05:49 PM 8/2/2013, J. Forster wrote:
>>I'm not certain it's the same model, but the one I'm familiar with was in
>>a Wamco (formica) case, maybe 10" x 12" x 8" with some colored binding
>>posts. They has a little glass 'thermal convertor' about the size of a
>>pecan. The rest of the box was precision resistors and high quality
>>(Shallcross ?) switches.
>>
>>There were a bunch of part-built ones surplused in the Boston area in the
>>late 1970s. Internally they had plexi panels with 0.1% and .01%
>> resistors,
>>in decade values as I remember.
>>
>>If that's the puppy, I know nothing more. I still have some of the parts
>>put away somewhere. I never had any paperwork AFAIK. They may have been
>>affiliated with Weston.
>>
>>If this is not the puppy, never mind. :)
>>
>>-John
>>
>>=============
>
>
>
> Sincerely,
>
>
>
> Marv
> Philadelphia, PA
>
>
R
R.Phillips
Tue, Aug 6, 2013 2:24 PM
-----Original Message-----
From: Marv @ Home
Sent: Tuesday, August 06, 2013 2:49 PM
To: jfor@quikus.com ; Discussion of precise voltage measurement ; Discussion
of precise voltage measurement
Subject: Re: [volt-nuts] Rotek 320 AC/DC Calibrator
Thanks John, appreciated, not sure if they are similar as the unit is
in transit and not in my possession, its a boat anchor. Will let
you'all know the status after a thorough evaluation. Still doing
'discovery' and getting as much info as possible.
From a volt nuts perspective, for other readers, calibrators may
have very stable references in single digit ppm, and maybe an option
instead of build your own reference, plus they may come with built in
KV dividers, precision AC oscillators etc., that alone maybe worth
the whole kaboodle. Some are dirt cheap, as low as free except
postage, others not so.
At 05:49 PM 8/2/2013, J. Forster wrote:
I'm not certain it's the same model, but the one I'm familiar with was in
a Wamco (formica) case, maybe 10" x 12" x 8" with some colored binding
posts. They has a little glass 'thermal convertor' about the size of a
pecan. The rest of the box was precision resistors and high quality
(Shallcross ?) switches.
There were a bunch of part-built ones surplused in the Boston area in the
late 1970s. Internally they had plexi panels with 0.1% and .01% resistors,
in decade values as I remember.
If that's the puppy, I know nothing more. I still have some of the parts
put away somewhere. I never had any paperwork AFAIK. They may have been
affiliated with Weston.
If this is not the puppy, never mind. :)
-John
=============
Sincerely,
Marv
Philadelphia, PA
Marv
Your recent discussion re. the ROTAX , (WESTON-ROTAX) Standard.
I have just "dug out" my Rotax 401A DC Absolute Voltage/Current Standard -
this provides 1.0000 V dc, 1.0185 V dc, 9.9950 V dc. Current (16v), 7.50
mA, 10.00 mA
It gave very good results when last checked, built like a
proverbial - - - - - . It came from a lab. which was shut some years ago,
and I have no data - I will be interested if you obtain more information on
these 'old timers'
Roy
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.
-----Original Message-----
From: Marv @ Home
Sent: Tuesday, August 06, 2013 2:49 PM
To: jfor@quikus.com ; Discussion of precise voltage measurement ; Discussion
of precise voltage measurement
Subject: Re: [volt-nuts] Rotek 320 AC/DC Calibrator
Thanks John, appreciated, not sure if they are similar as the unit is
in transit and not in my possession, its a boat anchor. Will let
you'all know the status after a thorough evaluation. Still doing
'discovery' and getting as much info as possible.
>From a volt nuts perspective, for other readers, calibrators may
have very stable references in single digit ppm, and maybe an option
instead of build your own reference, plus they may come with built in
KV dividers, precision AC oscillators etc., that alone maybe worth
the whole kaboodle. Some are dirt cheap, as low as free except
postage, others not so.
At 05:49 PM 8/2/2013, J. Forster wrote:
>I'm not certain it's the same model, but the one I'm familiar with was in
>a Wamco (formica) case, maybe 10" x 12" x 8" with some colored binding
>posts. They has a little glass 'thermal convertor' about the size of a
>pecan. The rest of the box was precision resistors and high quality
>(Shallcross ?) switches.
>
>There were a bunch of part-built ones surplused in the Boston area in the
>late 1970s. Internally they had plexi panels with 0.1% and .01% resistors,
>in decade values as I remember.
>
>If that's the puppy, I know nothing more. I still have some of the parts
>put away somewhere. I never had any paperwork AFAIK. They may have been
>affiliated with Weston.
>
>If this is not the puppy, never mind. :)
>
>-John
>
>=============
Sincerely,
Marv
Philadelphia, PA
Marv
Your recent discussion re. the ROTAX , (WESTON-ROTAX) Standard.
I have just "dug out" my Rotax 401A DC Absolute Voltage/Current Standard -
this provides 1.0000 V dc, 1.0185 V dc, 9.9950 V dc. Current (16v), 7.50
mA, 10.00 mA
It gave very good results when last checked, built like a
proverbial - - - - - . It came from a lab. which was shut some years ago,
and I have no data - I will be interested if you obtain more information on
these 'old timers'
Roy
_______________________________________________
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.
R
R.Phillips
Tue, Aug 6, 2013 5:48 PM
Sorry for misspelt name - it is of course Rotek (Weston - Rotek)
Roy
-----Original Message-----
From: R.Phillips
Sent: Tuesday, August 06, 2013 3:24 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Rotek 320 AC/DC Calibrator
-----Original Message-----
From: Marv @ Home
Sent: Tuesday, August 06, 2013 2:49 PM
To: jfor@quikus.com ; Discussion of precise voltage measurement ; Discussion
of precise voltage measurement
Subject: Re: [volt-nuts] Rotek 320 AC/DC Calibrator
Thanks John, appreciated, not sure if they are similar as the unit is
in transit and not in my possession, its a boat anchor. Will let
you'all know the status after a thorough evaluation. Still doing
'discovery' and getting as much info as possible.
From a volt nuts perspective, for other readers, calibrators may
have very stable references in single digit ppm, and maybe an option
instead of build your own reference, plus they may come with built in
KV dividers, precision AC oscillators etc., that alone maybe worth
the whole kaboodle. Some are dirt cheap, as low as free except
postage, others not so.
At 05:49 PM 8/2/2013, J. Forster wrote:
I'm not certain it's the same model, but the one I'm familiar with was in
a Wamco (formica) case, maybe 10" x 12" x 8" with some colored binding
posts. They has a little glass 'thermal convertor' about the size of a
pecan. The rest of the box was precision resistors and high quality
(Shallcross ?) switches.
There were a bunch of part-built ones surplused in the Boston area in the
late 1970s. Internally they had plexi panels with 0.1% and .01% resistors,
in decade values as I remember.
If that's the puppy, I know nothing more. I still have some of the parts
put away somewhere. I never had any paperwork AFAIK. They may have been
affiliated with Weston.
If this is not the puppy, never mind. :)
-John
=============
Sincerely,
Marv
Philadelphia, PA
Marv
Your recent discussion re. the ROTAX , (WESTON-ROTAX) Standard.
I have just "dug out" my Rotax 401A DC Absolute Voltage/Current Standard -
this provides 1.0000 V dc, 1.0185 V dc, 9.9950 V dc. Current (16v), 7.50
mA, 10.00 mA
It gave very good results when last checked, built like a
proverbial - - - - - . It came from a lab. which was shut some years ago,
and I have no data - I will be interested if you obtain more information on
these 'old timers'
Roy
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.
Sorry for misspelt name - it is of course Rotek (Weston - Rotek)
Roy
-----Original Message-----
From: R.Phillips
Sent: Tuesday, August 06, 2013 3:24 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Rotek 320 AC/DC Calibrator
-----Original Message-----
From: Marv @ Home
Sent: Tuesday, August 06, 2013 2:49 PM
To: jfor@quikus.com ; Discussion of precise voltage measurement ; Discussion
of precise voltage measurement
Subject: Re: [volt-nuts] Rotek 320 AC/DC Calibrator
Thanks John, appreciated, not sure if they are similar as the unit is
in transit and not in my possession, its a boat anchor. Will let
you'all know the status after a thorough evaluation. Still doing
'discovery' and getting as much info as possible.
>From a volt nuts perspective, for other readers, calibrators may
have very stable references in single digit ppm, and maybe an option
instead of build your own reference, plus they may come with built in
KV dividers, precision AC oscillators etc., that alone maybe worth
the whole kaboodle. Some are dirt cheap, as low as free except
postage, others not so.
At 05:49 PM 8/2/2013, J. Forster wrote:
>I'm not certain it's the same model, but the one I'm familiar with was in
>a Wamco (formica) case, maybe 10" x 12" x 8" with some colored binding
>posts. They has a little glass 'thermal convertor' about the size of a
>pecan. The rest of the box was precision resistors and high quality
>(Shallcross ?) switches.
>
>There were a bunch of part-built ones surplused in the Boston area in the
>late 1970s. Internally they had plexi panels with 0.1% and .01% resistors,
>in decade values as I remember.
>
>If that's the puppy, I know nothing more. I still have some of the parts
>put away somewhere. I never had any paperwork AFAIK. They may have been
>affiliated with Weston.
>
>If this is not the puppy, never mind. :)
>
>-John
>
>=============
Sincerely,
Marv
Philadelphia, PA
Marv
Your recent discussion re. the ROTAX , (WESTON-ROTAX) Standard.
I have just "dug out" my Rotax 401A DC Absolute Voltage/Current Standard -
this provides 1.0000 V dc, 1.0185 V dc, 9.9950 V dc. Current (16v), 7.50
mA, 10.00 mA
It gave very good results when last checked, built like a
proverbial - - - - - . It came from a lab. which was shut some years ago,
and I have no data - I will be interested if you obtain more information on
these 'old timers'
Roy
_______________________________________________
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.
