[volt-nuts] John Miles' GPIBKIT - how to get it? Re: volt-nuts Digest, Vol 66, Issue 15

[new]

I find no 'search' function on here... How do you get to
the GPIBKIT ?
Willy



On 2/20/2015 12:00 PM, volt-nuts-request at febo.com wrote:
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> Today's Topics:
>
>     1. Fluke 725 and 726 (pa4tim at gmail.com)
>     2. Re: 3458a BASIC commands for today??? (cfo)
>     3. What do the NIST numbers on a calibration sheet come from and
>        what do they mean? (John Phillips)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 19 Feb 2015 17:16:56 +0000
> From: <pa4tim at gmail.com>
> To: volt-nuts <volt-nuts at febo.com>
> Subject: [volt-nuts] Fluke 725 and 726
> Message-ID: <54e624f2.edcdb40a.2362.1fdf at mx.google.com>
> Content-Type: text/plain; charset="utf-8"
>
> Can someone help me with 2 Fluke service manuals or schematics fot the 725 and 726 proces calibrators ?
>
>
> I have here for repair a Fluke 725 that has a fried ADC. It has been to a Fluke dealer for repair and you do not want to know how bad that job is done. (missing pads and traces , cold solderjoints, , a relais facing the wrong way, the -5V from the 4053 tied to gnd, a damaged resistor etc. )  I'm 100% sure the ADC is dead and 95%  that is the only problem left but have not ordered a replacement yet because I hope for a manual so I can check the rest for hidden supprises caused by the dealer.
>
>
> The 726 from the same customer that came in this week only has a TC problem.  I traced the TC output to an opamp and analog switch. In TC mV mode he measures it correct but in K mode ( I only haver K TC's ) or any other TC's except for N, he shows the letter of the TC so that part works.  But no value in derees.
>
> As far as I can gues the ADC measures the voltage, and the software does the conversion. But in that case it is weird it measures and displays the voltage correct. So I think there must be some switching before the ADC but I can not find it. I get stuck at the opamp.
>
> and ADC because they are hidden behind the display making it hard to measure. I use a lab powersupply and an extender cable to the keypad but the display uses those bloody zebrastrips.
>
>
> A lot of the repairs I do are older, rather exotic gear with missing schematics/service doc so I'm used to finding my own wayvbut I'm not that masochistic, so I prefer to use documentation.
>
>
> Fred
>
> Schneider electronics repair bv
>
> www.schneiderelectronicsrepair.nl
>
> www.pa4tim.nl
>
> ------------------------------
>
> Message: 2
> Date: Thu, 19 Feb 2015 19:35:38 +0000 (UTC)
> From: cfo <xnews5 at luna.dyndns.dk>
> To: volt-nuts at febo.com
> Subject: Re: [volt-nuts] 3458a BASIC commands for today???
> Message-ID: <mc5dua$7ck$1 at ger.gmane.org>
> Content-Type: text/plain; charset=UTF-8
>
> On Thu, 19 Feb 2015 04:23:07 +0000, Mark Sims wrote:
>
>> IF you have a GPIB interface,  download the GPIBKIT package from John
>> Miles' web site.  It now contains my HP3458 cal ram dumper program.  It
>> will extract the cal info from the NVRAM,  make a backup binary image of
>> the cal ram chip ,  and dump a formatted and commented listing of the
>> cal data.
>> The binary data file can be used to program a replacement NVRAM chip
>> when the battery in the old chip dies and you need to replace it...
>> saving you a buncha bucks for a re-calibration of the instrument.
> I did a "linux-gpib" "addon lib" that fakes a few parts of GPIBKIT , so
> you can use Mark's/PHK's program , and i mailed the source to Mark.
>
>
> /CFO
>
>
>
> ------------------------------
>
> Message: 3
> Date: Thu, 19 Feb 2015 12:06:22 -0800
> From: John Phillips <john.phillips0 at gmail.com>
> To: Discussion of precise voltage measurement <volt-nuts at febo.com>
> Subject: [volt-nuts] What do the NIST numbers on a calibration sheet
> 	come from and what do they mean?
> Message-ID:
> 	<CANEyv6br9ARRJ2XnHy9sqyqM6Z4WSQRNUzcMHfs=J0=2mVeqFQ at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>