Re: [volt-nuts] Old HP3458A - SN: 2823A 03939
hi the EPROMs are in sockets, no soldering needed. but again, buying a precision instrument but reprogramming cal data that is years old does not make any sense. unless of course if you are just a collector and do not use its accuracy. adrian Gesendet: Dienstag, 07. Oktober 2014 um 16:35 Uhr Von: cfo xne...@luna.dyndns.dk An: volt-nuts@febo.com Betreff: Re: [volt-nuts] Old HP3458A - SN: 2823A 03939 I'm now the proud owner of a HP 3458A OPT-002. I have adapted Mark's 3458A CalRam program to use linux-gpib , and have made backups of the calram , and the dataram. I will get a new calram : http://tinyurl.com/mggqmos And 2 x dataram : http://tinyurl.com/otspeek I'll get 4 x 32k SRAM for opt 001 - hopefully these are correct. http://tinyurl.com/kjbtcla Does anyone know if the Eproms are already in sockets ? I was planning on installing sockets for the calram , datarams , but have hoped the eeproms was already in sockets. TIA CFO - Denmark ___ 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] Old HP3458A - SN: 2823A 03939
On 10/8/2014 4:23 AM, acb...@gmx.de wrote: the EPROMs are in sockets, no soldering needed. but again, buying a precision instrument but reprogramming cal data that is years old does not make any sense. unless of course if you are just a collector and do not use its accuracy. It makes perfect sense, for the same reason that HP doesn't touch the cal if it's in spec - for tracking/characterization. By keeping the same cal constants, if and when he does send it in for calibration he'll be able to know how much it drifted since it was last cal'd (25 years ago?). -- Mike ___ 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] Old HP3458A - SN: 2823A 03939
well, I do that with my references if they cannot be adjusted reasonably such as the 732a. but for meters and calibrators I do not. achievieng high precison with such an instrument then means you still need to characterize it (i.e. calibrate, and not adjust it, doesnt save money essentially) and secondly you always need to apply a transfer factor, i am too lazy for that, i rather get it adjusted when i cal it. also, the reference is stable, true, but other things do drift, and we talk 10+ yeras here (last cal sticker i saw). it would certainly be interesting to know where its different ranges went inbetween (if it was known that it was adjusted to within spec back then, which probably is not known) Gesendet: Mittwoch, 08. Oktober 2014 um 10:32 Uhr Von: Mike S mi...@flatsurface.com An: volt-nuts@febo.com Betreff: Re: [volt-nuts] Old HP3458A - SN: 2823A 03939 On 10/8/2014 4:23 AM, acb...@gmx.de wrote: the EPROMs are in sockets, no soldering needed. but again, buying a precision instrument but reprogramming cal data that is years old does not make any sense. unless of course if you are just a collector and do not use its accuracy. It makes perfect sense, for the same reason that HP doesn't touch the cal if it's in spec - for tracking/characterization. By keeping the same cal constants, if and when he does send it in for calibration he'll be able to know how much it drifted since it was last cal'd (25 years ago?). -- Mike ___ 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] Old HP3458A - SN: 2823A 03939
I'm now the proud owner of a HP 3458A OPT-002. I have adapted Mark's 3458A CalRam program to use linux-gpib , and have made backups of the calram , and the dataram. I will get a new calram : http://tinyurl.com/mggqmos And 2 x dataram : http://tinyurl.com/otspeek I'll get 4 x 32k SRAM for opt 001 - hopefully these are correct. http://tinyurl.com/kjbtcla Does anyone know if the Eproms are already in sockets ? I was planning on installing sockets for the calram , datarams , but have hoped the eeproms was already in sockets. TIA CFO - Denmark ___ 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] Old HP3458A - SN: 2823A 03939
In message 006401cfd782$031657f0$094307d0$@att.net, J. L. Trantham writes: I don't know where the '1' firmware resides. In an 8051 on the isolated side of things. As far as I know, there are only a '1' and '2' version of that, but I don't have access to the '2' version, so I don't know what the difference might be. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ 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] Old HP3458A - SN: 2823A 03939
On Sun, 21 Sep 2014 15:22:14 +, cfo wrote: Gents I'm looking for a 3458A , and have found one : SN: 2823A 03939 w. opt 002 Seller says it's passing selftest. The seller has returned with this info : hello again too, rev : 5,1 i think CAL-Ram's have been changed on 1999 but i m not sure. In can accept a 30 days warranty no problem. So it's fw: 5,1 CFO ___ 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] Old HP3458A - SN: 2823A 03939
I suspect it has the six EPROM version of the A5 board, where the '5' firmware resides. The Ver 8 files are 'out there' and it should be a simple matter of burning the six chips if you have a chip burner. I don't know where the '1' firmware resides. Joe -Original Message- From: volt-nuts [mailto:volt-nuts-boun...@febo.com] On Behalf Of cfo Sent: Tuesday, September 23, 2014 1:57 PM To: volt-nuts@febo.com Subject: Re: [volt-nuts] Old HP3458A - SN: 2823A 03939 On Sun, 21 Sep 2014 15:22:14 +, cfo wrote: Gents I'm looking for a 3458A , and have found one : SN: 2823A 03939 w. opt 002 Seller says it's passing selftest. The seller has returned with this info : hello again too, rev : 5,1 i think CAL-Ram's have been changed on 1999 but i m not sure. In can accept a 30 days warranty no problem. So it's fw: 5,1 CFO ___ 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] Old HP3458A - SN: 2823A 03939
I have replaced a fan in one of my 3458A. I used this one ... http://www.digikey.com/product-detail/en/622L/381-2266-ND/1131198 I contacted ebm-papst with the original part number. They were not able to pull the original specs to offer a newer sub. I happened to notice it was made in West Germany. They told me that there was no information available and that the one I selected was close based on the label. It works fine but it seems to be slightly louder than the other two older 3458A. The original connecter has to be spliced onto the bare wire of the new fan. I agree with keeping the older one and only change it if the fan fails or is too loud. Todd Sent from my iPad On Sep 22, 2014, at 10:02, Frank Stellmach frank.stellm...@freenet.de wrote: Hello, to update such an old instrument you need the following components: 1EA DS1220AD-150+, about 8$ from maxim/Dallas or distributor 2EA DS1230Y-150+, about 30$ 6EA 27C512-100, about 20$, STM 4EA 62256-80, about 10$ 3 precision DIL sockets for nvSRAMs I assume, the firmware will be the earliest one, (#2 ??) and also the calibration will be old, but still valid, i.e. the calibration constants in the nv-SRAMs might not be corrupted yet. You will have to read out the CALRAM content first over HPIB (described here and elsewhere), then (easily) desolder the 3 nv-SRAMs. Replace these by the precision DIL sockets. Copy the 2kB CALRAM content into the fresh one, and assemble these 3 RAMs. The content of the 2x32KB RAMs will be initialized automatically. And the calibration, especially for the higher frequency AC measurements, will be conserved for the next 10..20 years. Also plug in these 4 SRAMs for cheap opt. 1. (148K memory) After these updates - and only if you really need a fresh calibration, i.e. if you don't have access to precise 10V and 10kOhm, you may spend these 500€ for calibration by a HP or Fluke lab. Firmware 9 you may buy from Keysight, but order the single EPROM (4MBit) version for about 30$, or so, but you have to split that content bytewise into the six EPROMs (all FW versions are obviously compatible concerning the different HW versions). They take around 200$ for the old 6 EPROMs version only.. Maybe a friendly volt-nuts is able to assist at that point ;-) Yep, the fan is quite loud, but might still work all right, so keep it. Nobody has identified a better (less noisier) part yet. If the plastic filter is intact, you only have to disassemble and clean it carefully, and that's it. (That has to be done on regular basis anyhow, so that Ti = (Ta + 15°C) at any time). Service Note 18-A, formally applies to a certain batch of agilent instruments only, S/N US28031400 - US28032927, as it is indicated on that note. On that batch, the LTZ1000 was unstable, and the A/D converter caused short-term out-of-spec. We have discussed that, and it's not clear, whether the first issue might also apply to all LTZ references in general, if they are not powered continuously.. Remember that the LTZ1000 @ 95°C is at least 8 times less stable than at the regular 65°C, and it is hysteretic at that elevated temperature, so the 1yr. stability of 8ppm or even 4ppm can only be guaranteed by pre-selection of the reference module. But I strongly assume, that this old HP instrument is not affected at all by SN 18A. After that, the instrument will be as good as new, best case for 70$ in total. Frank ___ 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] Old HP3458A - SN: 2823A 03939
TIA: Push blue key then blue R ( the shifted TRIG key) and ENTER. Then press the downarrow V key 4 times to get to the REV? on the display. Then press ENTER and two numbers will be displayed with a comma in the middle. The first number is the multimeter's master processor firmware revision. The second number is the slave processor's firmware revision. This is if the full menu has been set. If not, see the MENU command in the Operator's Manual and set it to FULL. Mine are both 7,2 and I have no problems. The latest is 9. Bill - Original Message - From: cfo xne...@luna.dyndns.dk To: volt-nuts@febo.com Sent: Sunday, September 21, 2014 8:22 AM Subject: [volt-nuts] Old HP3458A - SN: 2823A 03939 Gents I'm looking for a 3458A , and have found one : SN: 2823A 03939 w. opt 002 Seller says it's passing selftest. But it's an old serial# , is there any way one can verify that it has an up-to date firmware , and maybe via that see if it has has all the needed upgrades or ServiceNotes applied ? TIA CFO Denmark ___ 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] Old HP3458A - SN: 2823A 03939
I checked my 3458A and it says that the Rev is 8.2. What can I infer about the unit? I have not opened it up yet to check the status of the NVRAM since I am waiting for the posidrive tools. Randy On Sun, Sep 21, 2014 at 9:20 AM, J. L. Trantham jlt...@att.net wrote: Not in front of my meter right now but IIRC, 'Blue Key' (shift), 'R', 'Down Arrow' until you find Rev? then hit enter. It will return something like 7,1 or 8,2 etc. The first digit is the master processor firmware version and the second number is the slave processor firmware version. The master processor firmware is located on the A5 Board, the Outguard Controller. I'm not sure where the slave processor firmware is located. 9,2 is the latest AFAIK. I've heard that there is not much difference between 8 and 9. I don't know how to check for the Service Note Compliance. Would probably have to read each note then explore the meter to see what is installed. Good luck. Joe -Original Message- From: volt-nuts [mailto:volt-nuts-boun...@febo.com] On Behalf Of cfo Sent: Sunday, September 21, 2014 10:22 AM To: volt-nuts@febo.com Subject: [volt-nuts] Old HP3458A - SN: 2823A 03939 Gents I'm looking for a 3458A , and have found one : SN: 2823A 03939 w. opt 002 Seller says it's passing selftest. But it's an old serial# , is there any way one can verify that it has an up-to date firmware , and maybe via that see if it has has all the needed upgrades or ServiceNotes applied ? TIA CFO Denmark ___ 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] Old HP3458A - SN: 2823A 03939
Thank you for the info about the fw. revision. I'm going to ask the seller what it says, when performing those steps. CFO -- E-mail:xne...@luna.dyndns.dk ___ 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.
