I finally found it after I realized I had to select the LONG MENU first. Thanks,
Randy On Mon, Aug 18, 2014 at 7:27 AM, Charles Black <cbl...@centurytel.net> wrote: > Hit the grey key in the "FUNCTION/RANGE" key block. Then hit "T" (light > grey marking) in the "MENU" key block Then hit down arrow twice in the > "FUNCTION/RANGE" key block. You will now have TEMP? on the display. Then > hit the "Enter" key in the "NUMERIC/USER" key block. Now you should see the > TEMP? value in degrees Celsius. > > Charlie > > > On 8/17/2014 8:48 PM, Randy Evans 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.