ith my two Fluke 732As and two HP-3458As.
Rrandall Evans
On Sat, Feb 17, 2018 at 4:38 AM, Andre wrote:
> also see https://workmanship.nasa.gov/lib/insp/2%20books/links/
> sections/407%20Splices.html
>
> -Andre
>
> ____
> From:
I have a question for the group. I was looking at an article for building
an ultra-low noise voltage reference by Walt Jung, published in Electronic
Design June 24, 1993 and a URL to the article is below. I want to filter
the output of an LTZ1000 based 10V reference I am building and this circuit
Is there a relaible source for the GT-NE6H1925T neons? Mouser has them for
special order and I suspect they want a high minimum quantity. A source in
China lists them but I'm not sure I trust a Chinese source.
On Sat, Jan 6, 2018 at 8:19 AM, David C. Partridge <
david.partri...@perdrix.co.uk> wr
hardware issue. I did the
service note 13A test and the unit passed it fine. I will have to do more
troubleshooting on my own but I really appreciate the help.
Randy Evans.
On Sun, Dec 31, 2017 at 6:09 AM, Todd Micallef wrote:
> Randy,
>
> I put together a quick script for testing your conn
Todd,
Since the KE5FX NVRAM download software works, that would seem to indicate
the GPIB is working, wouldn't it (download completes and checksums OK)?
Randy
On Sat, Dec 30, 2017 at 9:52 PM, Randy Evans
wrote:
> Todd,
>
> The minimal quick test would be greatly appreciated i
ls with GPIB communication
> failures. There is a test within the document to see if a shorting jumper
> needs to be installed.
> I can try reducing the code to something minimal for a quick test if you
> want. It will take some time in the morning.
>
> Todd
>
> On S
if anything other than KE5FX's memory dump
> program
> >> > will work on my HP3458A.
> >> > Thanks again,
> >> > Randy
> >> >
> >> > Sent from my Verizon, Samsung Galaxy smartphone
> >> > Original message
ything can be done to replicate your issue.
>
> Todd
>
>
> On Sat, Dec 30, 2017 at 6:42 PM, Randy Evans
> wrote:
>
> > Todd,
> >
> > I tried adding the line but it made no difference.
> >
> > Randy
> >
> > On Sat, Dec 30, 2017 at 12
Todd,
I tried adding the line but it made no difference.
Randy
On Sat, Dec 30, 2017 at 12:19 PM, Randy Evans
wrote:
> Todd,
>
> Does it matter where I put the line in the Init_Device procedure?
>
>
> procedure Init_Device;
> begin;
>EZGPIB_BusWrite
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
s using a much older version.
>
> Todd
>
> On Sat, Dec 30, 2017 at 10:42 AM, Randy Evans
> wrote:
>
> > Todd,
> >
> > I have version 1.01. Yes, please e-mail me your modified version. Maybe
> it
> > will help.
> >
> > Thanks,
> >
> > R
rks for you, I will
> have Illya update it on xDevs.
>
> Todd
>
> On Sat, Dec 30, 2017 at 12:39 AM, Randy Evans
> 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_
ave 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
w
rt 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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to see
if there is agreement that the A9 board is likely the culprit.
Thanks,
Randy Evans
On Fri, Dec 1, 2017 at 1:58 AM, wrote:
> What you describe (A9 drift) would be the explanation. However question is
> how much you see. The A9 should not drift much in the intervals you talk
> ab
,
Randy Evans
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od stable 3458A
stable to <0.2ppm over week.
On November 24, 2017 9:32:30 AM GMT+08:00, Randy Evans <
randyevans2...@gmail.com> wrote:
>
> Illya,
>
> Can you explain why you say " If ACAL DCV does not remove drift then A3
> is probably fine". I don't really f
serviced at some time.
>
> On November 24, 2017 8:40:00 AM GMT+08:00, Randy Evans <
> randyevans2...@gmail.com> wrote:
>>
>> Illya,
>>
>> I ran the test you suggested over 4 days and got 7.19114068 VDC on the
>> start of the test and 7.19113736 VDC at the
the A3
card is the primary source of drifting. Since the unit is a late model
Agilent unit, that is well beyond the expected range of units described in
Service Note 18. What do you think?
Thanks,
Randy Evans
On Sat, Nov 18, 2017 at 4:47 AM, Illya Tsemenko wrote:
> Since you have 732A, test
, 2017 at 12:58 PM, Randy Evans
wrote:
> When I try to execute a 10V cal, I get an error code "209 HARDWARE FAILURE
> - - INTERNAL OVERLOAD:31" I suspect that the unit has a different
> security code than 3458. I can't change it without opening up the unit,
> which
o you have any other
suggestions on how to check the A9 card?
On Sat, Nov 18, 2017 at 11:17 AM, Randy Evans
wrote:
> Illya,
>
> That is a great idea. I will give it a try.
>
> Thanks
>
> On Sat, Nov 18, 2017 at 4:47 AM, Illya Tsemenko wrote:
>
>> Since you have 732A, testin
directly in the meter, and there are still gain parts to get +12 and
> -12VREF on A3 and 10Vish bipolar levels on A1. If your CAL? 2,1 stays same
> (within 0.3ppm) then A9 is fine.
>
>
> On November 18, 2017 12:59:53 PM GMT+08:00, Randy Evans <
> randyevans2...@gmail.com> wrote
.
Thanks,
Randy Evans
HP-3458A Calibration drift rate 2017-11-17A.xlsx
Description: MS-Excel 2007 spreadsheet
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and follow the
Frank,
Thanks for the information. I was hoping to hear from someone that had
actually successfully used the DS1220AD in the 3458A. I did not understand
the comment about the "instrument of 'quarks'", but it may be in regards to
the second set of DS1230Y NVRAMs? Did you change those out to DS12
that has actually successfully replaced the DS1220Y with the
DS1220AD, since the DS1220Y is no longer avaialble..
On Fri, Nov 10, 2017 at 5:20 AM, Poul-Henning Kamp
wrote:
>
> In message gmail.com>
> , Randy Evans writes:
>
> >Does anyone know if the DS1220AD
access."
There have been documented cases where the new DS1220AD part will not work
in circuits designed with the DS1220Y (now discontinued).
I would like to know if anyone has successfully utilized the DS1220AD
before proceeding to buy the parts. Similar question for the DS1230Y and
D
I believe that the Fluke shorting system has 3/4" spacing both vertically
and horizontally, which is not compatible with the 3458 (I couldn't find a
spec but visually it looks identically in both dimensions in the photos).
The 3458 spacing is slightly greater than 3/4' horizontally.
On Thu, Nov 9,
e DS1230Y NVRAM, but does still
make the DS1230Y NVRAM, according to their data sheet).
Thanks,
Randy Evans
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ntrolling processor does not become active during a power-up cycle
for at least 125ms to ensure
that the NV SRAM is available before the processor attempts a memory access.
Randy Evans
On Fri, Nov 3, 2017 at 2:54 AM, David C. Partridge <
david.partri...@perdrix.co.uk> wrote:
> This gets od
Bob,
Please send me the Paypal information for sending you the payment. Would
you send me pictures of the unit also?
thanks
Randy Evans
On Thu, May 4, 2017 at 3:00 PM, Four Designs Company <
fourdesi...@comcast.net> wrote:
> Sold!
>
Bob,
I am interested in the Keithley if it is still available.
Thanks,
Randy Evans
On Thu, May 4, 2017 at 1:09 PM, Four Designs Company <
fourdesi...@comcast.net> wrote:
> Greetings all:
>
> I am offering a Keithley 2000 6-1/2 digit DMM for sale. This instrument is
> from m
Frank,
The 8 pA bias current is well within the spec for the LTC1050 (+-10pA
typical, worst case +-50pA at 25C) but I was surprised about the lack of
variation. I also tried an "air bridge" wiring from the 887 filter to the
LTC1050 to avoid any leakage of the circuit board. It made no difference,
It looks like a better candidate would be the LTC2054, which has a typical
bias current of 1 pA at 25C and is essentially constant up to 45C.
Randy
On Thu, Apr 27, 2017 at 5:02 PM, Randy Evans
wrote:
> Charles,
>
> You are absolutely correct. I misread the data sheet. It's inte
Charles,
You are absolutely correct. I misread the data sheet. It's interesting
that all three LTC1050s behave exactly the same. They have the same lot
code number.but I would expect more variation. Live an learn.
Randy
On Thu, Apr 27, 2017 at 12:18 PM, Charles Steinmetz
wrote:
> Randy wrot
.
However, this would imply an 8pA bias current, which is much higher than
expected. My question is: does anyone else have a better explanation for
this issue and does anyone experience this issue with the original circuit?
Thanks,
Randy Evans AE6YG
FYI, I bought two of these used 3458A reference boards for $85 each a few
years ago and they both experience noise bursts. I plan on replacing the
LTZ1000 chips on them (sometime in the near future).
Randy Evans
AE6YG
On Sun, Mar 12, 2017 at 10:53 AM, m k wrote:
>
>
> On 12/03/17
Jerry,
I have a DAS-46 that I picked up but have yet to work on it. I would like
to get a copy of the LTSpice chopper model that you developed.
Thanks,
Randy Evans
randyevans2...@gmail.com
On Mon, Feb 13, 2017 at 4:57 PM, Jerry Hancock wrote:
> Hello, again all:
>
> Interest
KiCad looks very good and I downloaded it to try it out. However, does
anyone have a good, low-cost PCB fab house to recommend? I am designing a
voltage reference programmable fro 0 to 10 volts with a LTZ1000 reference
and settabiltiy of 0.1ppm and I need a PCB fabbed.
Thanks,
Randy Evans
Does anyone have experience with PCBArtist? It looks pretty good for
2-layer board up to 60 in^2 for $33 but I have no experience with it. I
was looking at Eagle PCB but it's pretty expensive for a 4-layer capability
version.
Thanks,
Randy Evans
Illya,
Very interesting. The temco/stability data does not plot but the X-Y
format seems to be OK. Is it supposed to plot or do I have to plot it
myself with the csv data?
Thanks,
Randy Evans
On Thu, May 26, 2016 at 3:42 AM, Illya Tsemenko wrote:
> I'm glad my little project got
I live locally and I am interested in the items. Do you have a complete
list available?
Randy Evans
On Apr 9, 2016 9:34 PM, "Demian Martin" wrote:
> I have a number of precision bridges and the like that I really need to
> move
> on to a new home. Is there anyone local to m
esistance.
>
>
>
>
> > Gesendet: Freitag, 08. April 2016 um 03:35 Uhr
> > Von: "Randy Evans"
> > An: "Discussion of precise voltage measurement"
> > Betreff: Re: [volt-nuts] ADA4522
> >
> > Sure, all good applications. I am think
ffered outputs with good reverse isolation...
>
> Daniel
> Em 07/04/2016 13:31, "Randy Evans" escreveu:
>
> > Has anyone looked at the ADA4522 precision op amp from Analog Devices.
> It
> > looks very intriguing with it's extremely low offset voltage drift
Has anyone looked at the ADA4522 precision op amp from Analog Devices. It
looks very intriguing with it's extremely low offset voltage drift of 22
nV/°C maximum. The offset voltage is as high as 5 uV but this could be
nulled out and it should be very stable over temperature after that. It
could
Willy,
Where are you located?
Randy Evans
AE6YG
On Sun, Jan 31, 2016 at 11:49 AM, new wrote:
> I'm thinking of doing non-commercial 'calibrations' for
> folks like us volt-nuts.
>
> Since I have three 3458s, three 732As, a 732b, a 4214,
> an sr104, a 4210,
Have the Pickering paper and the Spreadbury and Deaver papers been uploaded
to K04BB's site? If not, I would like to get copies e-mailed to me also.
Thanks,
Randy Evans
On Fri, Nov 13, 2015 at 9:49 AM, Charles Steinmetz
wrote:
> Frank wrote:
>
> yes I have this paper, size
I would like to know if there are any volt-nuts in the San Francisco bay
area; e.g., San Jose area where I live.
Randy Evans AE6YG
On Wed, Sep 30, 2015 at 4:29 PM, Pete Lancashire
wrote:
> Interesting idea a voltnuts location database
> On Sep 30, 2015 12:34 PM, wrote:
>
> > I
I used a 12 AWG wire formed into a U shape for the short and the zero
voltage measured less than 0.2 uV after a good 2+ hour warmup. However, I
am seeing drifts of several uV for the 752 calibration. I was using TV
twin lead to connect the 732 to 752 and 752 to 3458A since that's really
all I hav
A bit of a false lead. I took the readings after an hour of warmup.
However, after about two hours, the zero reading went to less thatn 0.2 uV,
which seems just fine to me. I guess i just needed to get a really good
warmup time.
However, the 752 readings are varying over several uV when doing th
I shorted the input terminals of my HP-3458A with a short lead of copper
wire, Bell telephone wire as recommended in the manual. The reading I get
is around 000.00070 mV, or 0.7 uV with NLPC set to 100. I was trying to
evaluate it's use as a null meter for my Fluke 752A divider. This seems a
lit
opper spade lugs (Pomona 2305 Low thermal EMF
spade lug, Gold-plated?). Any other suggestions?
Thanks,
Randy Evans AE6YG
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and follo
Frank,
I don't plan on operating at 80C. I just want an insulation that can
withstand up to 80C so i have a safety margin. 45C is probably too low for
my environment but 50C might be doable.
Thanks,
Randy
On Tue, Jul 7, 2015 at 12:29 AM, Frank Stellmach wrote:
>
> Hi Randy,
>
>
> 80°C and 'h
that looks like it would work really well, but I have no idea
what it is. Does anyone have any suggestions?
Thanks,
Randy Evans AE6YG
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Dave,
I checked the HP-419A marked up schematic and I find it very clear and
readable. Does anyone else have problem reading the pdf file?
Thanks,
Randy Evans
On Wed, Jun 24, 2015 at 6:38 PM, Randy Evans
wrote:
> Dave,
>
> I should have checked it. I will generate a higher r
ost a higher resolution image of the markup
> details? Don't really need the full schematic, just the areas where the
> connections to the new circuit are made.
>
>
> Thanks again,
> Dave M
>
>
> Randy Evans wrote:
>
>> I have created a shared link to my workin
design a bit.
Hopefully I created the link correctly. Let me know if you have any issues
with the link.
https://www.dropbox.com/sh/7b3hsy0j0wq35hw/AABkmVptTwVu2EJFRqtSdAjya?dl=0
Randy Evans AE6YG
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To
Hi,
I have largely finished the design but it's designed to support the HP-419A
and Fluke 845A, with an isolation circuit for the HP-419A. Unfortunatley,
I have not had time to finish the implementation (PCB design and build) due
to a heavy work scdhedule over the last year, and its not getting a
Frank,
Thanks for the data. The 100K seems acceptable since I have a Fluke 732A
to recalibrate the 3458A with after the change and the 3458A is not in a
rack.
Randy
On Tue, Jun 2, 2015 at 2:50 PM, Frank Stellmach
wrote:
> Hi Randy,
>
> in advance, this change only improves the stability of t
but I am
confused how to use it (I want to back up my HP-3458A before I attempt to
replace the display board).
thanks,
Randy Evans AE6YG
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und the exchange program is still in place.
> The
> > PN is 03458-69517 and the price is $278.
> >
> > Randy Evans AE6YG
> >
> > On Wed, Apr 15, 2015 at 12:05 PM, Randy Evans
> > wrote:
> >
> > > I need to replace the display board for my HP-3458A (se
FYI,
I contacted Keysight and found the exchange program is still in place. The
PN is 03458-69517 and the price is $278.
Randy Evans AE6YG
On Wed, Apr 15, 2015 at 12:05 PM, Randy Evans
wrote:
> I need to replace the display board for my HP-3458A (several dim to
> missing pixels). Ther
I need to replace the display board for my HP-3458A (several dim to missing
pixels). There used to be a swap program for the display board but I can't
find it on Keysight's website. Does anyone know if it's still available?
If so, how do I find it?
Thank
Thanks Jan,
These plots should prove very useful.
Randy Evans
On Sun, Feb 15, 2015 at 4:12 AM, Jan Fredriksson wrote:
> It's reply #984 in the thread. See also #982
>
> http://www.eevblog.com/forum/projects/ultra-precision-reference-ltz1000/msg605967/#msg605967
>
> Di
Jan,
Would you please post the link to your plot? I searched but haven't found
it yet.
thanks,
Randy Evans
On Thu, Feb 12, 2015 at 3:51 AM, Jan Fredriksson wrote:
> I posted a plot of calculated resistor values versus temperature in
> the LTZ1000 thread on the EVV blog yetserda
The reference module is in a metal box and uses an external linear PS with
internal separate regulation. I don't think its external EMI, but anything
is possible.
Randy
On Wed, Jan 28, 2015 at 10:28 PM, Hendrik Dietrich wrote:
>
> Am 29.01.2015 04:07, schrieb Randy Evans:
>
>
I bought two HP-3458A ref boards from John Daly (he no longer has any more)
and they worked fine but have intermittent noise bursts. I suspect they
were rejects from HP/Agilent. At some point I will probably replace the
LTZ1000As and reduce the internal temperature set point for better
stability.
This is indirectly pertinent to the group since I am designing a PCB for
the HP-419A and Fluke 845A modifications. Does anyone have any
experience/comments on the Design Spark PCB design package? Is is a viable
package for hobbyist use?
thanks,
Randy Evans
connector, and then
> wiring the daughter board onto the trace remnants still running to the
> connector. The only downside would be no resale to a purist who wants to
> run with the David Wise HP H11 linear optocoupler/photochopper replacement
> (see HP yahoo group for HP740b ).
>
&
Thanks Mark,
I will take a look at them. I don't have a PCB package to generate Gerbers
yet so i am somewhat locked into services like ExpressPCB.
Randy
On Tue, Dec 2, 2014 at 8:38 PM, Mark Sims wrote:
> OSHPARK.COM is in the US and will do three boards for $5/sq inch... with
> no setup or sh
to end without the need to re-adjust the null meters zero.
> This was the driving source for my mod,
>
> Dallas
>
>
> Randy Evans wrote:
>>
>>> I finished the H-419A/Fluke 845A design modifications but I am still
>>>> trying to decide on the preferred po
s possible.
> By leaving the existing inverter circuit in place, you can easily derive
> any voltages (+ and -) that your mod needs from it, without the need for
> additional isolated power supplies
>
> Dave M
>
>
>
> Randy Evans wrote:
>
>> I finished the H-419A/F
would query the group.
Any thoughts on what would be your preferences?
Thanks,
Randy Evans
On Mon, Aug 4, 2014 at 8:33 AM, Randy Evans
wrote:
> I am looking at modifying my (defective) HP419A and Fluke 845A Null meters
> using the LTC2054 zero drift op amp. I am planning on using a s
he
> optical chopper. Any help or made expericance would perfect.
>
> BR
> Ludger / PeLuLe
>
> *Gesendet:* Samstag, 09. August 2014 um 03:23 Uhr
> *Von:* "Randy Evans"
> *An:* "Discussion of precise voltage measurement"
> *Betreff:* Re: [volt-nu
Charles,
Thanks for the update. I was able to get a cable plug set from Todd
Micallef.
Randy
On Mon, Oct 20, 2014 at 6:23 AM, Charles Steinmetz
wrote:
> Randy wrote:
>
> Does anyone have a spare connector plug for the 732A external battery
>> *** ( I saw several in discussions but I'm not su
Does anyone have a spare connector plug for the 732A external battery
connector that they would be willing to sell. Or conversely, a good Fluke
PN for the connector ( I saw several in discussions but I'm not sure which
is the best part number to use).
Thanks,
Randy
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 wrote:
> Not in front of my meter right now but
lue of the readings are around 10.58 VDC but neither
unit is calibrated. I assume they can be calibrated but I wanted to make
sure they are stable first.
Do these numbers look reasonable and do they indicate any issues with the
units?
Thanks,
Randy Evans
__
ed reference. but my assumption re the above is that your meter is
> always on, as I said) 732a references et al do have small short term
> drifts, you can determine them with a josephson element (these guys told
> me), but the 732a is certainly very stable short term compared to a 3
with a josephson element (these guys told me), but the 732a is
> certainly very stable short term compared to a 3458a. my 732a e.g. has a
> drift of 0.2ppm per year.
>
>
> > Gesendet: Mittwoch, 27. August 2014 um 14:36 Uhr
> > Von: "Randy Evans"
> > An: &q
I forgot to mention that I reduced the number of measurements to 100 per
set since I wasn't seeing much difference in the variance between 100 and
1000 measurements and the 1000 measurement per set takes too long.
Randy
On Wed, Aug 27, 2014 at 5:13 AM, Randy Evans
wrote:
> I am doing
gt;
> thanks
>
>
>
>
> > Gesendet: Dienstag, 26. August 2014 um 04:23 Uhr
> > Von: "Randy Evans"
> > An: "Discussion of precise voltage measurement"
> > Betreff: Re: [volt-nuts] 732A and Prologix received
> >
> > Is there any way to
he
> display it is done. But then with 1000 PLC that is around 16.66 seconds
> per
> reading times 100 readings is somewhere around 28 minutes and there is
> probably some overhead time so around 30 minutes. Not from the front panel
> at any rate.
>
> Bill
>
>
while
before it's complete, but i have to guess when it's done.
Thanks,
Randy
On Sun, Aug 24, 2014 at 6:04 PM, Randy Evans
wrote:
> Bill,
>
> I am trying to figure out the MATH function without much success. I input
> the sequence you said (I looked up the instructions t
For some reason I can no longer access the Volt-Nuts web site. Has
anything changed on the permissions list? Is anyone else having this
problem? I get the following message:
"You don't have permission to access /pipermail/volt-nuts/ on this server."
Thanks,
Randy
_
up to the 732A 1.0 volt output I got
> a variation of 0.159 uVolts using the same 40 reading method above. I
> would
> use this to determine where your problem might exist. Just having the
> meter
> input shorted will point you in the right direction. Meter, cables or
> 732
uVolts using the same 40 reading method above. I
> would
> use this to determine where your problem might exist. Just having the
> meter
> input shorted will point you in the right direction. Meter, cables or
> 732A.
>
> Sorry for the long dissertation. Friends get mad at me fo
ore after plugging in the leads due to the "thermals"
> > > generated because of the difference in temperature between the banana
> jacks
> > > on the 732A and the banana plugs of the leads. I have found that even
> just
> > > plugging in the lead will generat
> able
> to make a measurement after plugging in the leads. I just measured the
> variation of the 1 volt output of my 732A and using my 3458A and I got a
> total difference of 0.159 uV over 40 measurements using 100 PLC on the 1
> volt range of the 3458A. Using the MATH function and a
I hope someone can help with a strange anomaly on either my 3458A or the
732A. The 732A 10V output as measured on my 3458A seems relatively stable
over time (it bounces around about +/-1 uV but is it the 732 or the 3458?).
However, the 1.000 VDC output drifts downward at a rate around 1-2 uV per
circuit may need adjusting. I tweaked mine and it
> seemed to work fine.
>
> Todd
>
>
> On Fri, Aug 22, 2014 at 10:42 PM, Randy Evans
> wrote:
>
> > I received my Fluke 732A today. Just powered it up but it needs new
> > batteries. Any suggestions for sources (
I received my Fluke 732A today. Just powered it up but it needs new
batteries. Any suggestions for sources (I haven't opened up the unit yet -
I want to make sure it works before doing that). Also received the
ProLogix USB-GPIB adapter. I plan on using Mark Sims' CAL ran data dumper
program to
Mark,
I just ordered the ProLogix USB-GPIB converter specifically to read the
contents of my 3458A. Would it be possible to get a copy of your program
that you wrote to read the memory contents. It would be greatly
appreciated and save me a lot of work and frustration.
thanks,
Randy
On Wed,
ock 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 8/1
rature measurement.
>
> Todd
>
>
> On Sun, Aug 17, 2014 at 11:48 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
> &
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
wrote:
> That worked! Now it reads 000.00030mV. So far it looks good exc
nable.
Randy
On Sun, Aug 17, 2014 at 1:36 PM, Todd Micallef wrote:
> Randy,
>
> Next thing you know, you will be looking at a 10K standard resistor to go
> with that 3458A and possible 732A.
>
> Todd
>
>
> On Sun, Aug 17, 2014 at 3:51 PM, Randy Evans
> wrote:
>
quot;.
>
> See pg. # 64 of the CAL Manual for the syntax.
>
> Bill
>
> - Original Message -
> From: "Randy Evans"
> To: "Discussion of precise voltage measurement"
> Sent: Sunday, August 17, 2014 12:25 PM
> Subject: Re: [volt-nuts] RE &
f this reading over time that is very
> important.
> Fluke says that it could change as much as 10 ohms per month but mine are
> rock solid for years and years.
>
> Bill
>
> - Original Message -
> From: "Randy Evans"
> To:
> Sent: Sunday, August 17, 2014 11
y "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 -
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 di
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