[volt-nuts] John Miles' GPIBKIT - how to get it? Re: volt-nuts Digest, Vol 66, Issue 15
garnere at gmail.com
Mon Feb 23 12:54:43 EST 2015
the GPIBKIT has it's homepage here:
On Mon, Feb 23, 2015 at 9:14 AM, new <pitts7 at williams-net.com> wrote:
> I find no 'search' function on here... How do you get to
> the GPIBKIT ?
> 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.
>> Schneider electronics repair bv
>> 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.
>> 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?
>> <CANEyv6br9ARRJ2XnHy9sqyqM6Z4WSQRNUzcMHfs=J0=2mVeqFQ at mail.
>> Content-Type: text/plain; charset=UTF-8
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