[volt-nuts] HP 3458A

Sun Aug 7 04:50:19 UTC 2011

Calibration, is only testing and noting the deviation from the standard used. To adjust the meter to this standard is an extra service. And indeed shipping, other air humidity, other temperature ect and time will change this. I have a guildline cabinet. The papers it was calibrated every year in the 79's and 80's. I have the reports ( and some copy of the bills) because it came with all documentation . I got it as a gift from an internal calibration lab of a very big company. I was lookimg on the net to search info and I wrote some firms like guildline to find out more about these wonderfull cabinets. Then I heard that calibrating such a cabinet ( that was, if I lived in the USA, but over here it must be allso posdible I guess) was still possible and  transportation alone was 750 dollar)

Fred PA4TIM

Op 7 aug. 2011 om 02:13 heeft WB6BNQ <wb6bnq at cox.net> het volgende geschreven:

> This response illustrates the absurdity in the whole process.  The so-called
> "Golden Calibration" is only of value in shifting from a fixed standard to an
> instrument that can measure "in-between" values to a high degree if done within
> minutes of the set up.  It is called the transfer ratio and is the 24 hour
> specification.
> 
> The absurdity to think your going spend additional money for the "Golden" part
> and get something is total BS.  Even the STE/9000 is the value at the time of
> calibration.  Bouncing around in shipping could certainly invalidate that value.
> 
> Such antics could best be described as the cat chasing his tail.
> 
> Bill....WB6BNQ
> 
> 
> gbusg wrote:
> 
>> Hi Brooke,
>> 
>> MU at 10Vdc for the "Golden Calibration" is in the range +/- 0.2 ppm, IIRC.
>> 
>> MU at 10Vdc for the "STE/9000 Calibration" is in the range +/- 3.6 ppm,
>> IIRC.
>> 
>> The "Golden Calibration" verifies the 3458A to its 24 hour specs.
>> 
>> The "STE/9000 Calibration" verifies the 3458A to its 1 year specs.
>> 
>> Cheers,
>> Greg
>> 
>> ----- Original Message -----
>> From: "Brooke Clarke" <brooke at pacific.net>
>> To: "Discussion of precise voltage measurement" <volt-nuts at febo.com>
>> Sent: Saturday, August 06, 2011 6:45 AM
>> Subject: Re: [volt-nuts] HP 3458A
>> 
>> Hi Greg:
>> 
>> For example on the 10 VDC measurement what are the specs for the two
>> types of cal?
>> 
>> Have Fun,
>> 
>> Brooke Clarke
>> http://www.PRC68.com
>> http://www.End2PartyGovernment.com/
>> 
>> gbusg wrote:
>>> Steve,
>>> 
>>> Both cal versions verify all functions and ranges of the 3458A, and both
>>> versions provide test data.
>>> 
>>> However the Standards Lab cal (known as a "Golden calibration) utilizes a
>>> completely different, more sophisticated procedure and methodology,
>>> resulting in significantly lower Measurement Uncertainty for most
>>> measurands
>>> (compared to the STE9000 calibration).
>>> 
>>> If you want to trend your 3458A at specific measurands (e.g., at 10Vdc,
>>> 10k
>>> ohms and 1V 20kHz, etc.), then you will want the Standards Lab cal - this
>>> is
>>> because the STE9000 calibration's Test Uncertainty Ratios are too low for
>>> you to realize enough meaningful confidence and repeatability of the data
>>> for the purpose of trending specific measurands.
>>> 
>>> For the same reason you will want the Standards Lab cal if you plan to use
>>> Agilent's calibration test report data as correction factors in some
>>> state-of-art process you have.
>>> 
>>> If neither of these two applications fit you, then the STE9000 calibration
>>> will probably suffice for you.
>>> 
>>> The more I think about this, I think mostly it's other metrology labs who
>>> need the "Golden calibration" (for at least one of their 3458As) and those
>>> are the folks who already know what they need and how to order it.
>>> 
>>> -Greg
>>> 
>>> ----- Original Message -----
>>> From: "Steve"<steve-krull at cox.net>
>>> To: "Discussion of precise voltage measurement"<volt-nuts at febo.com>
>>> Cc:<volt-nuts at febo.com>
>>> Sent: Friday, August 05, 2011 2:28 PM
>>> Subject: Re: [volt-nuts] HP 3458A
>>> 
>>> 
>>> I haven't sent the meter in for calibration yet. Hoping Santa might bring
>>> that for Christmas. Our local Agilent rep swore the only difference
>>> between
>>> the Agilent $550 calibration per incident and the pricier ones offered is
>>> the amount of paperwork you receive; the actual calibration is to full
>>> specs
>>> for all functions and all ranges. The Agilent web site seems to say the
>>> same
>>> thing, so I'm a bit confused by others saying there's calibration and
>>> there's full calibration. I need to go read the information provided by
>>> Greg
>>> Burnett and then approach Agilent again. When I was in metrology full
>>> time,
>>> all calibrations were to full specs or you had to clearly note any
>>> deviations and get the customer to buy off on them. It was amazing how
>>> many
>>> would accept things I wouldn't accept for my home lab!
>>> 
>>> Steve
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> volt-nuts mailing list -- volt-nuts at 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 at 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 at 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 at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.