[volt-nuts] GPIB Issue with 3458A

[Randy Evans]

Todd,

I will try the mod shortly.  The software version on my HP is 8.2 and my
Agilent is 9.2.  My friend's units are identical HP and Agilent with the
same software versions as mine but the xDevs software  works fine with both
of his units.

Randy

On Sat, Dec 30, 2017 at 11:20 AM, Todd Micallef <tmicallef at gmail.com> wrote:

> Randy,
>
> I am the person that wrote that EzGPIB script. It was my first before I
> moved on to Python and I have only written a couple for the different
> meters I have on hand. Version 1.01 is the most current version I have for
> the 3458A.
> I see that I should have added at least one more command to the meter
> initialization.  The additional init command is used in the scripts on
> xDevs.
>
> Add the following line in the Init_Device procedure
>    EZGPIB_BusWriteData(gpib_address,'END ALWAYS');
>
> This tells the meter to send an EOI on every read.
>
> I am looking for one of my Prologix adapters or I would test this. When I
> find it, I will also test it. I want to make sure there are no further
> issues.
> Also, do both meters run the same firmware versions? I wonder if the HP
> meter is using a much older version.
>
> Todd
>
> On Sat, Dec 30, 2017 at 10:42 AM, Randy Evans <randyevans2688 at gmail.com>
> wrote:
>
> > Todd,
> >
> > I have version 1.01. Yes, please e-mail me your modified version.  Maybe
> it
> > will help.
> >
> > Thanks,
> >
> > Randy
> >
> > On Sat, Dec 30, 2017 at 4:24 AM, Todd Micallef <tmicallef at gmail.com>
> > wrote:
> >
> > > Randy,
> > >
> > > Is there a version number at the top of the file? I had two versions
> > (1.00
> > > and 1.01). I can't remember all that changed between the two since it
> has
> > > been a while but I did find an additional timeout code that limited the
> > > wait time for reading data to 1 minute. I am guessing I had a problem
> > with
> > > mine and added it.
> > >
> > > I can email it to you if you want to try it. If it works for you, I
> will
> > > have Illya update it on xDevs.
> > >
> > > Todd
> > >
> > > On Sat, Dec 30, 2017 at 12:39 AM, Randy Evans <
> randyevans2688 at gmail.com>
> > > wrote:
> > >
> > > > I am still unable to get my HP-3458A to work with the xdevs program
> > > > "HP3458A_Measure_DMM_Noise.488" (https://xdevs.com/article/
> dmm_noise/
> > ).
> > > > It
> > > > works fine with my Agilent 3458A and with a friend's HP-3458A and his
> > > > Agilent 3458A using the EZGPIB program.  The SW versions are
> identical
> > > with
> > > > my friend's DMMs, the HP units are (8.2) and with the Agilent units
> are
> > > > (9.2).  However, both of my units work fine with the KE5FX GPIB
> Toolkit
> > > > HP3458.EXE program to download the NVRAM CAL data.  This would seem
> to
> > > > indicate that my HP-3458 GPIB works at least partially.
> > > >
> > > > Does anyone have a EZGPIB program that I could try to run (that is
> > > > different from the Xdev program)?  It would be nice to see if I could
> > get
> > > > something to work other than the HP3458.EXE program.  Or if any one
> has
> > > > some ideas on what to look for.
> > > >
> > > > Thanks,
> > > >
> > > > Randy Evans
> > > >
> > > > On Tue, Dec 26, 2017 at 7:24 PM, Randy Evans <
> randyevans2688 at gmail.com
> > >
> > > > wrote:
> > > >
> > > > > I am hoping some of you experts might be able to assist with a
> > strange
> > > > > problem i am having trying to make automated measurements using
> > EZGPIB
> > > > with
> > > > > an Agilent and an HP 3458A.  I have a program given to me by Martin
> > > > > Reynolds, which is a variant on the Xdevs noise measurement
> program.
> > > > > Martin's program continuously reads the voltage measurements
> > > sequentially
> > > > > from the two meters and then stores then in a measurements file,
> > along
> > > > with
> > > > > the temperature measurements from both meters.  The program works
> > fine
> > > on
> > > > > his Agilent and HP 3458As.
> > > > >
> > > > > On my two 3458As, it takes the temperature measurements just fine
> but
> > > > only
> > > > > takes a voltage measurement from the Agilent unit.  The HP unit
> will
> > > not
> > > > > make any voltage measurements although I can see both the 3458As in
> > > talk
> > > > > states and, of course, it does sent the temperature measurements.
> > > > However,
> > > > > if I turn the HP unit off and then on again, the HP will start to
> > take
> > > > > voltage and temperature measurements and send them to the PC.
> > > > >
> > > > > Any ideas on what might be causing the strange behavior?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Randy Evans
> > > > >
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