Todd, I am very new to the 3458 so much of it is slowly unfolding mystery to me (I'm a three day wonder). I went to the menu and selected FULL and then TEMP? appeared. I am not sure where to find this but it's probably in the manual somewhere. I will slowly uncover these secrets but it's frustrating at times. Easy once you know it.
Thanks for the help, Todd. Randy On Sun, Aug 17, 2014 at 9:17 PM, Todd Micallef <tmical...@gmail.com> wrote: > Randy, > > Do you mean that you can select it, but it won't give you a temperature? Or > do you mean that you can't find it in the menu? If you go to the MENU > option, select FULL or something like that. It should enable all the extra > menus. > > If you can see it, I believe all you have to do is find it under the menu > and hit Enter. I have tested mine and have never had an issue with getting > a temperature measurement. > > Todd > > > On Sun, Aug 17, 2014 at 11:48 PM, Randy Evans <randyevans2...@gmail.com> > wrote: > > > Can someone explain to me how to read the internal temperature using the > > front panel TEMP? command. I have played around but I am doing > something > > wrong. > > > > thanks, > > > > Randy > > > > > > On Sun, Aug 17, 2014 at 5:13 PM, Randy Evans <randyevans2...@gmail.com> > > wrote: > > > > > That worked! Now it reads 000.00030mV. So far it looks good except for > > > the display. > > > > > > Thanks, > > > > > > Randy > > > > > > > > > On Sun, Aug 17, 2014 at 12:54 PM, Bill Gold <wpgold3...@att.net> > wrote: > > > > > >> You need a comma "," between the "0" and the "3458". So blu C "CAL > > >> 0,3458" "Enter". > > >> > > >> See pg. # 64 of the CAL Manual for the syntax. > > >> > > >> Bill > > >> > > >> ----- Original Message ----- > > >> From: "Randy Evans" <randyevans2...@gmail.com> > > >> To: "Discussion of precise voltage measurement" <volt-nuts@febo.com> > > >> Sent: Sunday, August 17, 2014 12:25 PM > > >> Subject: Re: [volt-nuts] RE "new" 3458A > > >> > > >> > > >> > Bill, > > >> > > > >> > You are very helpful and I really appreciate it. > > >> > > > >> > I entered BLUE-C-03458 and I still get the ERR message (106, "OUT OF > > >> RANGE > > >> > -- CAL secured"). That would be consistent with what you are > > saying. I > > >> > guess its no reason to panic yet. > > >> > > > >> > I'm not sure how to use the SECURE command. I guess it's time to > > open > > >> it > > >> > up but I will probably have to get some PosiDrive screwdrivers. > > >> > > > >> > Thanks, > > >> > > > >> > Randy > > >> > > > >> > > > >> > On Sun, Aug 17, 2014 at 11:39 AM, Bill Gold <wpgold3...@att.net> > > wrote: > > >> > > > >> > > Randy: > > >> > > > > >> > > You are doing a ZERO calibration on the meter rather than a > > ACAL. > > >> You > > >> > > have to give it a password after the "0" and then it will do the > > ZERO > > >> > > calibration. Usually the password is "3458" and comes from the > > >> factory > > >> > > that > > >> > > way. But someone could have changed it in the past. You can do > > this > > >> from > > >> > > the front panel menu using the SECURE command. But there is a > > jumper > > >> > > inside > > >> > > the 3458A which disables the request for a password so that you > can > > do > > >> any > > >> > > CAL or reset the password to what you want. So everything is > > working > > >> as > > >> > > expected. The jumper is JM600 on the outguard processor board > 66505 > > >> or > > >> > > 66515 on the left of the meter inside. Try "3458" first as most > are > > >> set > > >> to > > >> > > this password. Read the Calibration Manual pg. #8 for how to get > > >> inside > > >> of > > >> > > the meter. You will need two sizes of a PosiDrive type > screwdrivers > > >> to > > >> > > accomplish this. Again in the Cal Manual. > > >> > > > > >> > > Bill > > >> > > > > >> > > ----- Original Message ----- > > >> > > From: "Randy Evans" <randyevans2...@gmail.com> > > >> > > To: "Discussion of precise voltage measurement" < > volt-nuts@febo.com > > > > > >> > > Sent: Sunday, August 17, 2014 11:22 AM > > >> > > Subject: Re: [volt-nuts] RE "new" 3458A > > >> > > > > >> > > > > >> > > > Bill, > > >> > > > > > >> > > > I installed the U-short and executed the BLUE-C-0 front panel > > >> command > > >> and > > >> > > I > > >> > > > get an ERR on the display. I assume this is not good. Did I do > > >> this > > >> > > > correctly? > > >> > > > > > >> > > > Thanks, > > >> > > > > > >> > > > Randy > > >> > > > > > >> > > > > > >> > > > On Sun, Aug 17, 2014 at 10:49 AM, Bill Gold <wpgold3...@att.net > > > > >> wrote: > > >> > > > > > >> > > > > Randy: > > >> > > > > > > >> > > > > Look at page #23 of the 3458A Calibration Manual. Make > > >> yourself > > >> a > > >> > > "4 > > >> > > > > Terminal Short" as shown and put it in as shown. > > >> > > > > > > >> > > > > Before I did an ACAL I had around -000.00025 mVDC. After > > >> ACAL I > > >> > > now > > >> > > > > read +000.00002 mVDC. I did the "CAL 0" myself so I would > > expect > > >> that > > >> > > the > > >> > > > > meter should return to a low value, and it does. I do get a > > >> variation > > >> > > of > > >> > > > > +/- 30 nVDC using 100 PLC and just observing the variations. > > As I > > >> > > remember > > >> > > > > I have never seen a spec on the ZERO stability over > temperature. > > >> > > > > > > >> > > > > If I turn on the MATH function and then do 40 measurements > > >> with > > >> 100 > > >> > > PLC > > >> > > > > the statistics show: > > >> > > > > > > >> > > > > Low reading -70 nVDC > > >> > > > > Mean reading -28 nVDC > > >> > > > > High reading +3.5 nVDC > > >> > > > > Total Variation 73 nVDC > > >> > > > > > > >> > > > > So that correlates with my visual observation of 60 nVDC. > > >> After > > >> an > > >> > > > > hour > > >> > > > > the room had gone up around 1 degree C. Then I observed > > >> -000.00023 > > >> > > mVDC. > > >> > > > > After another ACAL the reading was again +000.00002 mVDC. > This > > >> > > particular > > >> > > > > meter has a negative tempco as the room temp goes up. > > >> > > > > > > >> > > > > Obviously do an ACAL before any precision measurements > > >> requiring > > >> > > low > > >> > > > > nanovolts. > > >> > > > > > > >> > > > > Go to the Keysight website and go to "Technical Support" > and > > >> choose > > >> > > > > "Parts". Then enter in the "Part Number" "03458-66517" which > > is > > >> the > > >> > > > > replacement "03458-66507" assembly and you will see the > > >> replacement > > >> > > part > > >> > > > > number on the right hand side. Click on that and you will get > > the > > >> > > > > information about the exchange program and so on. Looks like > > you > > >> can > > >> > > just > > >> > > > > order this part online and pay for it with a credit card, but > > you > > >> have > > >> > > to > > >> > > > > create or use an existing login account. > > >> > > > > > > >> > > > > I needed a new display a few years ago. At that time you > > >> could > > >> > > order > > >> > > > > just the display for around $80. Being extremely good at > > removing > > >> and > > >> > > then > > >> > > > > inserting and soldering I ordered the part. The problem was > > that > > >> the > > >> > > > > spacing from top to bottom of the pins had changed. It went > > from > > >> > > around > > >> > > > > 1.3 > > >> > > > > inches to around 1.5 inches. So I had to bend the pins to fit > > my > > >> > > display > > >> > > > > board and then get something like 72 pins into the holes on > the > > PC > > >> > > Board. > > >> > > > > It took hours. This change is probably why > HP/Agilent/Keysight > > >> doesn't > > >> > > let > > >> > > > > you just get the display anymore but wants you to get the > whole > > PC > > >> > > Board > > >> > > > > assembly. It did work just fine once installed. > > >> > > > > > > >> > > > > Hope this helps your decision to keep or not. > > >> > > > > > > >> > > > > Bill > > >> > > > > > > >> > > > > > > >> > > > > > > >> > > > > ----- Original Message ----- > > >> > > > > From: "Randy Evans" <randyevans2...@gmail.com> > > >> > > > > To: "Discussion of precise voltage measurement" < > > >> volt-nuts@febo.com> > > >> > > > > Sent: Saturday, August 16, 2014 10:36 PM > > >> > > > > Subject: Re: [volt-nuts] RE "new" 3458A > > >> > > > > > > >> > > > > > > >> > > > > > Interesting note. After the room cooled down from about 79F > > to > > >> 73F, > > >> > > and > > >> > > > > > another ACAL, the meter now reads +000.00035 mVDC, a more > > >> reasonable > > >> > > > > value, > > >> > > > > > although it does bounce around a couple of tenths of a uV. > > >> > > > > > > > >> > > > > > Maybe that is OK? If so, then the only issue would seem to > be > > >> the > > >> > > > > display > > >> > > > > > has some faint pixels, which a new display should fix. > > >> > > > > > > > >> > > > > > Randy > > >> > > > > > > > >> > > > > > > > >> > > > > > On Sat, Aug 16, 2014 at 9:59 PM, Randy Evans > > >> > > <randyevans2...@gmail.com> > > >> > > > > > wrote: > > >> > > > > > > > >> > > > > > > > > >> > > > > > > The unit seems to be working so far except for one issue. > > >> After > > >> > > doing > > >> > > > > an > > >> > > > > > > ACAL, and making sure the Auto Zero is ON, I short the > > input > > >> leads > > >> > > > > with > > >> > > > > a > > >> > > > > > > copper wire shunt across the inputs and the reading is > > >> > > approximately > > >> > > > > > > -000.0023 mVDC. That seems rather high. I would expect > > the > > >> unit > > >> > > to > > >> > > > > short > > >> > > > > > > the input leads internally and force a zero reading during > > the > > >> > > ACAL. > > >> > > > > > > Anyone have any comments on this reading? > > >> > > > > > > > > >> > > > > > > Thanks, > > >> > > > > > > > > >> > > > > > > Randy > > >> > > > > > > > > >> > > > > > > > > >> > > > > > > On Sat, Aug 16, 2014 at 3:37 PM, Richard Moore > > >> > > <richiem5...@gmail.com> > > >> > > > > > > wrote: > > >> > > > > > > > > >> > > > > > >> Hi Randy -- sounds like your unit is in cal, based on > your > > >> > > > > measurements > > >> > > > > > >> of DCV and precision 10k resistor. > > >> > > > > > >> > > >> > > > > > >> Using autocal all is recommended before doing precision > > >> > > measurements, > > >> > > > > and > > >> > > > > > >> I do that if it's been more than a day or two since last > > use. > > >> The > > >> > > > > autocal > > >> > > > > > >> uses the internal Vref and an internal 10K resistor to do > > cal > > >> on > > >> > > > > everything > > >> > > > > > >> else, so that tells you what the basic cal procedure is. > I > > >> just > > >> > > got > > >> > > my > > >> > > > > 3458 > > >> > > > > > >> back from Loveland, and that's what they did for me -- > > warmed > > >> it > > >> > > up, > > >> > > > > then > > >> > > > > > >> ran autocal, then measured everything against a Fluke > 5700, > > >> aided > > >> > > by > > >> > > > > an > > >> > > > > HP > > >> > > > > > >> 3325, and another 3458. > > >> > > > > > >> > > >> > > > > > >> It has been 5 years since I replaced the display board > (no > > >> > > "exchange" > > >> > > > > > >> deal was available then AFAIK, so I don't know what's > > >> changed) > > >> and > > >> > > > > also > > >> > > > > the > > >> > > > > > >> NVRAM board, which was dead, with one with the Snap-cap > RAM > > >> chips. > > >> > > I > > >> > > > > did > > >> > > > > > >> those replacements, then sent it home for cal, which was > > >> complete, > > >> > > > > since > > >> > > > > > >> all the RAM was new. Now after 5 years, the unit passed > all > > >> > > incoming > > >> > > > > > >> performance tests and was sent back to me without a cal > > >> process > > >> of > > >> > > any > > >> > > > > > >> kind. This tells me that an old, well-aged Vref module > is a > > >> good > > >> > > > > thing. > > >> > > > > The > > >> > > > > > >> 10VDC test had changed by a bit under 5ppm, or roughly > > >> 1ppm/year. > > >> > > > > > >> > > >> > > > > > >> They have a cal deal -- use code 1.090 -- press them for > it > > >> -- > > >> and > > >> > > > > that > > >> > > > > > >> saved me 30% off the normal price. I think this deal > lasts > > >> until > > >> > > > > > >> mid-September, so my recent "cal" ended up at just under > > $400 > > >> > > > > including > > >> > > > > > >> shipping. I'm not sure the deal is available on new or > > >> first-time > > >> > > > > cals; > > >> > > > > my > > >> > > > > > >> unit was in their data bank. > > >> > > > > > >> > > >> > > > > > >> But this is a long way of saying I don't think you need > to > > >> send > > >> it > > >> > > for > > >> > > > > > >> cal -- just push Auto Cal and Enter and wait about 10 > > minutes > > >> and > > >> > > you > > >> > > > > > >> should be good to go. > > >> > > > > > >> _______________________________________________ > > >> > > > > > >> 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. > > >> > > > > > > >> > > > _______________________________________________ > > >> > > > 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. > > >> > > >> _______________________________________________ > > >> 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. > _______________________________________________ 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.