hybridfree/eevblog-posts huggingface dataset:
Factory made bodge on an Agilent 34411a? - Page 1
Forum section: electronics / testgear

author: hp3310a
author_rank: Regular Contributor
timestamp: July 06, 2025, 04:14:02 pm
content: Hi,I managed to get me an Agilent 34411a in very good condition (after cleaning) and discovered a bodge on the underside of the main board, located under the bottom shield.Is it possible this has been done in the factory or was it more likely done by a previous owner (who no doubt knows more - about this meter and generally - than I do)?

author: KungFuJosh
author_rank: Super Contributor
timestamp: July 06, 2025, 04:36:19 pm
content: Is that flux residue, or a protective coating? It looks more like flux residue, and that makes me think not factory. I have seen some weird stuff from Agilent/Keysight tho. 🤷

author: hp3310a
author_rank: Regular Contributor
timestamp: July 06, 2025, 05:31:13 pm
content: Quote from: KungFuJosh on July 06, 2025, 04:36:19 pmYes, that's flux, I took the pictures before cleaning it, it is completely gone.

author: KungFuJosh
author_rank: Super Contributor
timestamp: July 06, 2025, 07:50:46 pm
content: Then I think it's safe to assume it wasn't done at the factory. Unless it was a Monday. Or late on Friday. Or upper management's unqualified relation(s).

author: Kean
author_rank: Unknown
timestamp: July 07, 2025, 12:47:27 pm
content: You may have an early rev PCB. That cap seems to be present (with a proper footprint) in the bottom side image in this post:https://www.eevblog.com/forum/repair/agilent-34410a-repair-attempt-of-2-dead-meters/msg820441/#msg820441I looked at the 34410A schematic but not sure what that cap is. The nearby large 24k resistors are R211 and R215. I'm not sure if there is a assembly diagram to identify parts.I personally wouldn't be too concerned about factory bodges with flux residue. It may be a little ugly, but the factory would certainly know if it needed cleaning.It looks like that area of the PCB is some distance away from the critical high impedance nodes. Cleaning can just spread contaminants further afield and cause problems requiring extra work.

author: hp3310a
author_rank: Regular Contributor
timestamp: July 07, 2025, 01:39:32 pm
content: Quote from: Kean on July 07, 2025, 12:47:27 pmExcellent catch, thanks for pointing me to it (I read that thread but didn't look close enough)! As for cleaning, let's hope the damage isn't severe, because that ship has sailed/been cleaned. I would love schematics but didn't find one yet. The service manual doesn't contain those.IMHO it looked suspiciously like a factory made bodge, can't put my finger on why exactly. The fact that the cap is present in a later revision seems to agree with that.

author: Kean
author_rank: Unknown
timestamp: July 07, 2025, 08:29:01 pm
content: Quote from: hp3310a on July 07, 2025, 01:39:32 pmSchematics are not hard to find for the 34410A and I suspect there is a lot in common.I've attached a copy that I had on file.
Rigol DS1052E problems - Page 1
Forum section: electronics / testgear

author: peryhelium
author_rank: Newbie
timestamp: July 08, 2025, 12:39:24 pm
content: Hello everyone!I recently bought a used Rigol DS1052E (software version 00.04.04.00.00, not hacked), and I’ve been pulling my hair out trying to figure out what’s going on. I’m running into multiple issues, and I’m not sure if I’m making a rookie mistake or if the unit is faulty. First of all the auto button doesn’t seem to be working properly. I connected the first channel to the calibration port and no signal appears on the screen with triggering and position levels on really odd values. The only way to see some kind of square wave is to set the vertical position to around -13V! Moving the trigger position doesn’t seem to help either. When I disconnect the probe the flat signal isn’t set at 0V. At 1.00V/div it’s at around 0.5V, 2V/div - ~0V, 5.00V/div- -10V with noise visible at some levels and not at others, even small changes to the scale move the signal a lot. Things aren’t any better with channel 2. When I first put my hands on it I was able to successfully compensate my probes but slight changes to the vertical scale changed the measured vpp of the square wave a lot. I reset it to factory settings a couple of times as well as self-calibrated it but each time something else is off, sometimes when I turn the scope off and back on the channels become unresponsive altogether. I tested it in three different houses and each time I run into the same problems. If it’s gonna be helpful I’m using cheap 100MHz P6100 probes and the warrant seal was cut in half.Any help would be greatly appreciated
Kikusui - awesome support ! - Page 1
Forum section: electronics / testgear

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: July 08, 2025, 11:20:01 am
content: Sad that this is the exception rather than the rule these days - All new front panel parts including display PCB for £87 inc VAT & delivery!https://youtu.be/lpG2qFnGb_4?t=210Other big brands please take note!

author: coromonadalix
author_rank: Super Contributor
timestamp: July 08, 2025, 11:35:22 am
content: Kikusui under NDA provided me with schematics on some psu models ... kudos to them
Tektronix 494P--Powers on but Front Panels Controls Unresponsive - Page 1
Forum section: electronics / testgear

author: Flyingdancingfool
author_rank: Newbie
timestamp: July 07, 2025, 03:59:31 am
content: Greetings!My Tek 494P purchased from auction powers on and I see a trace, but the front panel controls are unresponsiveThe manual does not appear to cover such as case.Could it be something simple like a ROM battery that needs replacing?Thanks!Kenn
Daetron MM100 Multimeter Manual Wanted c1980s - Page 1
Forum section: electronics / testgear

author: plexus
author_rank: Contributor
timestamp: July 06, 2025, 07:43:15 pm
content: Hi. I have a Daetron MM100 I bought new back in the late 80s. I have it back on th bench but I cant find my manual. Does anyone have a manual they can scan and send me? I've tried my google-fu but to no avail. I did find the MC300 manual, their capacitance meter manual. Thanks!

author: KungFuJosh
author_rank: Super Contributor
timestamp: July 06, 2025, 08:07:23 pm
content: https://www.worldradiohistory.com/CANADA/Canada-Miscellaneous/Electronics-&-Technology-1988-04.pdfThat has a nice write up with some info. Not quite a manual tho.
Funny multimeter story. - Page 1
Forum section: electronics / testgear

author: timlange
author_rank: Newbie
timestamp: July 05, 2025, 04:23:58 pm
content: Last year I dug out my old Radio Shack multi-meter, takes 6 or 8 AA batteries. I hadn't used it for 10 years, bought it about 30 years ago. I needed to do some continuity testing and remembered it should beep if this is a circuit. Get it out of the box, put new batteries in it and it appears to work fine, except the continuity testing doesn't beep. I check every setting on the meter, get the manual and read it, don't know what to do. Bring it up from the basement and now sitting in the living room where there is more light and comfortable chair. Start playing with it again, touching the leads together, no sound. After a few minutes of this my wife comes out of the kitchen and asks me what the hell am I doing and turn off that awful beep!! Turns out the meter is working fine and beeping very loudly, I just cannot hear that frequency. Off to Lafayette Electronics Supply, they have a bunch of meters, but they will not let me test any of them to see if I can hear them. Off to Ace Hardware, they have a few meters. I could not hear their store brand, but could hear the Klein M450 just fine.Two months later I got a hearing test and they say I need hearing aids. Off to Purdue Audiology Clinic (they make and train audiologists) and they set me up with a pair of aids. A few more trips and they get the aids working really well. I now hear the Radio Shack meter just fine, it sure is loud! :-) I hear crickets now, don't miss them. Cicadas are something else. Every once in a while I go out without my aids. It is like going out in a forest after a good rain, you hardly hear anything and what you do hear is muffled. Now the wife checks on me before we leave the house. Sigh ...
Improving the SIglent SSA3021X Plus - Page 1
Forum section: electronics / testgear

author: BillyO
author_rank: Super Contributor
timestamp: July 04, 2025, 11:42:21 pm
content: I'm sure there is a thread about this somewhere around here, but after 30minutes of searching I can't seem to get my question(s) fully answered.So here's what I have so far.1) The SSA3015X Plus is a dead end that cannot be improved to a higher spec.2) The SSA3021X Plus can be in proved to the SSA3032 spec usingthepython script. Is this correct?3) The SSA3075x Plus is different hardware and the lower spec units cannot be "improved" to this spec. Is this correct?Can I prevail on those that might know to help me out with this?

author: tautech
author_rank: Super Contributor
timestamp: July 05, 2025, 01:36:10 am
content: Quote from: BillyO on July 04, 2025, 11:42:21 pm1) Within the SSA range, correct.2) As per #13) Correct. Other closely related model ranges offer more options if you need push to 5 or 7.5 GHz.Time for a little bit more homework Bill.

author: BillyO
author_rank: Super Contributor
timestamp: July 05, 2025, 01:42:54 am
content: Thanks Rob.I don't need to go to 5+ GHz. Plus my budget is limited. In fact, things have to come together before this can be a reality.Quote from: tautech on July 05, 2025, 01:36:10 amI'm looking, but can't seem to find the information ..

author: tautech
author_rank: Super Contributor
timestamp: July 05, 2025, 01:49:28 am
content: Quote from: BillyO on July 05, 2025, 01:42:54 amDrop the Plus from searches then study them threads a bit.SSA3021X Plus is amazing bang for buck to those that want to tweak it some......
SVA1032x latest firmware? - Page 1
Forum section: electronics / testgear

author: pe1oxp
author_rank: Regular Contributor
timestamp: March 16, 2025, 12:23:33 pm
content: What is the latest firmware version for the SVA1032x and others?On the Siglent websites the latest firmware is version V3.2.2.5.1R1 (Release Date 06.28.22).The release notes also mentions V3.2.2.6.2R5 (Release Date 12.06.2024) but not found on the Siglent websites.Are the newer versions been withdrawn?

author: RoV
author_rank: Regular Contributor
timestamp: March 16, 2025, 06:36:46 pm
content: I have seen the same a few days ago, I think they did so by mistake.

author: antenna
author_rank: Frequent Contributor
timestamp: July 04, 2025, 07:01:15 pm
content: I finally got around to upgrading my firmware from 3.2.2.6.0R7 to 3.2.2.6.3R2 on my SVA1032x. I select the extracted ads file, the firmware update starts, but after a minute, it goes back to the file selection page. Returning to the previous screen shows the firmware number has not changed. Anyone know what I am doing wrong?

author: ChuckDarwin
author_rank: Regular Contributor
timestamp: July 04, 2025, 10:07:52 pm
content: I just did the upgrade from the same versions you are using. FAT32 2gig USB stick, ADS file in root (21,731K). System button->System Info->Firmware Update, selected file. Got an "Upgrading now, please wait message with a spinning hour glass and then a reboot after about a minute. Sys Info reports Uboot-OS: 3.2.2 and Software: 6.3R2. After the upgrade I noticed that the ADS file had been deleted off the USB stick. First thing I try when an update fails is a different USB stick, 8G or less stick or at least the FAT32 partition, shouldn't make a different, but it seems to for me.

author: tautech
author_rank: Super Contributor
timestamp: July 05, 2025, 12:44:56 am
content: Quote from: pe1oxp on March 16, 2025, 12:23:33 pmNo.V3.2.2.6.2R5 did get pulled as it has some major bug that was never revealed.You can get the latest here:https://int.siglent.com/download/firmwares/?ProId=30

author: bicycleguy
author_rank: Frequent Contributor
timestamp: July 05, 2025, 05:00:37 pm
content: Quote from: antenna on July 04, 2025, 07:01:15 pmDid the exact same thing with the same results a few days ago. Did some undocumented messing around and re-downloading and it eventually worked. Almost seemed like a virus issue with the drive as I had to delete some open files that I couldn't find what application had them open. This was on a M2 Mac Air, so very unusual.

author: KungFuJosh
author_rank: Super Contributor
timestamp: July 05, 2025, 05:50:52 pm
content: Quote from: bicycleguy on July 05, 2025, 05:00:37 pmHidden files aren't inherently evil. Mac loves adding hidden files to things also.

author: bicycleguy
author_rank: Frequent Contributor
timestamp: July 06, 2025, 03:23:11 am
content: Quote from: KungFuJosh on July 05, 2025, 05:50:52 pmFile wasn't hidden, it was open so couldn't be deleted. Had to stop processes of the same name with Activity Monitor in order to delete it. As a Mac developer I haven't seen something quite like that before. I could have gotten it from some other download, who knows?
VINTAGE (but new) AVIONICS TESTING EQUIPMENT ASSISTANCE GREATLY APPRECIATED  - Page 1
Forum section: electronics / testgear

author: Alisha_madariaga
author_rank: Newbie
timestamp: July 04, 2025, 02:45:16 am
content: Ok I apologize in advance if I’m in the wrong place . I ended up here from someone’s blog as a recommended source for the information I’m looking for . I hope someone can help me! I have 2 pieces of vintage avionics testing equipment I’m desperately trying to determine the value of but having a hard time achieving this. I have tried to search sold listings on eBay which is my usual go-to method but in this case, I either couldn’t find any or the comps weren’t really in line with my unit (theirs was “for parts” and not in working order. Mine is never used). I did findonesold listing for a working unit but it was heavily used and just one sold listing doesn’t seem like enough to go on. These aren’t in production any longer so I can’t go to the company for the info either. I don’t want to undervalue my items and so I’m hoping someone here can help me! I currently have an offer on the turbine tester and don’t know if I should accept it or not. The offer on eBay is for $650.These were my grandpa’s who owned an airport & flight school at Montgomery Field in San Diego. These are the items:Item 1:Turbine Temp Indicator System Test Set . Model 2312G-8 made by BARFIELD INSTRUMENTBackground info: “new” never used device from 1986 and includes the original bill of sale to the airport. I have no calibration certificates besides the test tag that came with unit at the time of purchase .Item 2:JC Air BF Goodrich ATC Squawk Naut (Check) I 332 Transponder Ramp Test SetThis item has only been used once or twice and DOES have a calibration certificate from Aeroflex but it’s from 2011 …I am unclear on when it was acquired. But it has only had one owner and as mentioned, only used a few times.Anyone’s help is greatly appreciated!! Thank you so much!
SDS 1072 CML + won't boot up - Page 1
Forum section: electronics / testgear

author: hakatu
author_rank: Newbie
timestamp: November 22, 2023, 01:04:35 am
content: Hi guys,I have a Siglent SDS 1072 CML+ that was working normally until yesterday. It stucks at the Siglent/Siglent Technologies logo indefinitely. I tried the Math button for hard reset but it doesn't work.This model has a USB B and RJ45 port at the back, is there anyway to recover the DSO base on those ports?Thank you in advance.

author: tautech
author_rank: Super Contributor
timestamp: November 22, 2023, 01:10:09 am
content: Quote from: hakatu on November 22, 2023, 01:04:35 amWelcome to the forum.NO, under any circumstances, no !Send PM with your email for our USB A recovery tools.

author: hakatu
author_rank: Newbie
timestamp: November 22, 2023, 01:52:49 am
content: Quote from: tautech on November 22, 2023, 01:10:09 amThank you for the warning. I sent you the PM for the tools.

author: tautech
author_rank: Super Contributor
timestamp: November 22, 2023, 01:58:52 am
content: Quote from: hakatu on November 22, 2023, 01:52:49 amReplied via your email.

author: hakatu
author_rank: Newbie
timestamp: November 22, 2023, 02:27:26 am
content: Thank you so much, it is now working normally

author: FIUNER
author_rank: Newbie
timestamp: February 22, 2024, 07:39:32 pm
content: Hi, I'm having the same problem. I work at University and I have 2 Osciloscopes that freeze. Can you help me about this.Tks!Rodolfo

author: FIUNER
author_rank: Newbie
timestamp: February 26, 2024, 08:10:24 pm
content: Thanks to Tautech! Now, Oscilloscopes are working normally!

author: cardosoluis
author_rank: Newbie
timestamp: December 12, 2024, 12:33:46 pm
content: I had the same issue on mine, but thanks to tautech was also able to fix this! Thank you!

author: maxente
author_rank: Newbie
timestamp: July 02, 2025, 06:02:38 pm
content: Hi everyoneToday, when i power the scope up it display the same problem with siglent logo on screen and nothing more. I try the math button but not working.Please help !My email adress is maxente----at----gmail---com

author: tautech
author_rank: Super Contributor
timestamp: July 02, 2025, 07:21:11 pm
content: Quote from: maxente on July 02, 2025, 06:02:38 pmWelcome to the forum.Siglent EU HQ will give you the support you need:https://www.siglenteu.com/contact-us/Give them the model# and SN#

author: maxente
author_rank: Newbie
timestamp: July 03, 2025, 08:25:44 pm
content: They really helped me today and the oscilloscope is alive again.Thank you
Odd HP / Agilent 3616A power supply transient load performance - Page 1
Forum section: electronics / testgear

author: bakl
author_rank: Newbie
timestamp: July 02, 2025, 09:50:10 pm
content: I just got a defective Agilent branded 3616A. The potentiometers on the front weren't doing anything and both the current and voltage were stuck at zero. It turned out that remote / local switches on the back were dirty and making poor contact. After switching them back and forth quite a few times it seemed to start working. That was until I started switching loads on and off while the unit was on and I noticed that the voltage seemed to take a big dip when connecting a load and a massive spike when disconnecting it. Is this normal?Here is the response to load changes. I used automotive light bulbs as the load. For reference the 3616A is rated at 35V and 1.7A. All of these tests stayed in constant voltage mode based on the lights in the front. The current limit was set at 1.7AImage one shows connecting the bulb with a set voltage of 8.4v and a current of 1.67A after it had settled. After the scope shot ended it returned all the way to 8.4VImage two shows disconnecting the bulb with the same voltage and current as image one. The voltage stops increasing because the over voltage protection circuit cuts off power.Image three shows connecting a different bulb with a 13V set point and a settled current of 0.55AImage four shows disconnecting that bulb

author: bakl
author_rank: Newbie
timestamp: July 02, 2025, 10:36:33 pm
content: According to the manual it should be within 0.1% + 2 mV when going from full load to no load and 0.1% when going from no load to full load, so the answer is it is definitely still broken somehow.
(RESOLVED) HP 8637A high quality service manual scan and ArtekManuals - Page 1
Forum section: electronics / testgear

author: benj38
author_rank: Frequent Contributor
timestamp: May 06, 2025, 02:03:10 pm
content: Last week I have placed an order on the ArtekManuals website for the HP 8673A service manual (the widely circulating 8673B manual from keysight is for the B version, and is of poor quality).Unfortunately, I have received no link for the manual download. Also, there is no response to emails sent to the email address on the contact page, and the phone number given there is out of service. I have also tried contacting through their eBay store, but no response yet.I thus have two questions:1. Does anybody know what is going on with ArtekManuals? I know that it is has been a few years now since Dave passed away, and Linda is not always in the best of health. I pray that this is just a temporary snag.2. Does anyone who has bought this manual from Artek in the past is willing to send me a copy? If somebody can send it to me I will not proceed with requesting a refund from PayPal, so the money will go to ArtekManuals as it should.

author: benj38
author_rank: Frequent Contributor
timestamp: May 06, 2025, 03:41:06 pm
content: My eBay query was answered by "Ron - an Artek Manuals affiliate", and as it turns out he helps getting the manuals out.In short, it looks like manual orders are being filled out.I hope that Linda is also feeling well, but I do not know.

author: squadchannel
author_rank: Frequent Contributor
timestamp: May 06, 2025, 04:31:04 pm
content: me too, I ordered a Tek 576 manual on April 18, and on April 21 Linda contacted me sayingQuoteI waited until the 29th and called again and was toldQuoteI decided to wait as I was not in a hurry, and on the 5th I received the link to Dropbox from Ron.It is indeed a concern.Artek is a must for vintageTE users.

author: tatel
author_rank: Frequent Contributor
timestamp: May 06, 2025, 04:40:13 pm
content: Yep, I did have similar inconvenients in the past, but in the end, one gets the ordered manual. Just a matter of time, perhaps a month or even two in some cases.I wish it could work better/faster, but I think things are not easy for that woman and I understand it. Hopefully it will be better in the future.

author: xtech
author_rank: Regular Contributor
timestamp: July 02, 2025, 08:45:17 am
content: I have ordered CLIP for some HP generator recently. Promptly I have received link to dropbox with 10 pdfs: five of them were duplicates with the same size and (1) added in the name but what is worse there was CLIP only for one module (only 21 pages), rest of the files are programming, service and user manuals. I didn't get any answer for email on which paypal payment (lwhitetarpon@msn.com) was done nor Manuals@ArtekManuals.com . Not nice
HP Power Supply Meter Bezel Replacement is Available - Page 1
Forum section: electronics / testgear

author: pdeal
author_rank: Contributor
timestamp: January 15, 2022, 12:43:58 am
content: New poster here. I've had an HP 6291A power supply with a broken meter bezel for 10 years or so. My main gig is that i own a machine shop and it's been my intention all along to fix this. The original bezel design is not practical to make as anything other than a molded plastic part. I came up with a design machined from 6061 aluminum that's is fairly easy to install and looks very nice. It does require that two 1/8" holes be drilled into the power supply front panel. The new bezel can be used locate the holes. I made 8 and used 2 of them on two of my power supplies so I have some extras which I have in my ebay store. It's intended to be as much a service to those that have these old supplies as anything since I think this is issue is somewhat common.https://www.ebay.com/itm/265496169304

author: sergej
author_rank: Contributor
timestamp: July 01, 2025, 02:37:56 pm
content: Nice work, some days ago I found one 6291A in scrapyard. Without bezel.Do you have one this ?How is mounted the original piece ?
ZK-FX35. Electronic load for $9. - Page 1
Forum section: electronics / testgear

author: Aldo22
author_rank: Super Contributor
timestamp: March 03, 2025, 06:10:22 pm
content: A thread for what is probably the cheapest electronic load.The product is not exactly new, but I haven't found much about it in this forum.Not much needs to be said about the appearance and the mechanical part.You can see from the picture that it's actually just a PCB with a few buttons, a knob, a few connectors and a fan.Absolute minimum. A housing does not seem to be considered.Input Voltage: DC 1.5V- 25VInput Current: 0A- 5AMax. 35W.During my load test, the temperature remained below 70°C (temperature is displayed).The fan sounds quite pleasant.The V and A display can be calibrated and is therefore quite accurate.Milliamps can be set (tedious), but nothing is displayed below 10mA.There is some overamp when switching on.Burden voltage measurement like in thisvideo.I think it's OK if you can live with the absolute minimum and the specifications and want to do a few hobby experiments with it.In any case, I am rather positively surprised that it works quite well and is not too annoying ;-)Labeled components are:N76E003AT20 MCUGN1621CB Display driverTIP122 Darlington-TransistorGN358A OpAmp12CWQ10FN Schottky RectifierManual

author: dichton
author_rank: Newbie
timestamp: June 30, 2025, 03:14:42 pm
content: I'm sorry if i'm bothering youI just came across your topicThing is i bought this same tester last year and broke it by doing a load test on ac-dc adapter 6v (the adapter stopped working too). Now the tester still shows voltage reading, adjusting load amp but when i press start it won't put any load. I did try to replace the transistor and rectifier out of impulse but no luck.Can you make a wild guess of what might be the problem ?Thank you very much

author: Aldo22
author_rank: Super Contributor
timestamp: June 30, 2025, 04:25:38 pm
content: I have no idea. Maybe you can find experts in therepair thread.Personally, I'd just buy a new one for $9 (or a better one) as I can't imagine getting the replacement parts for cheaper.

author: dichton
author_rank: Newbie
timestamp: July 01, 2025, 05:10:52 pm
content: thank you for your replyi bought atorch DL24 load tester right after the fx35 failed. The DL24 has been running great ever since
Looking for information: Nicolet Paratronics NICE Z80+ - Page 1
Forum section: electronics / testgear

author: nfmax
author_rank: Super Contributor
timestamp: January 12, 2020, 10:27:46 am
content: Clearing out some hidey holes recently, I came across an ancient Nicolet NICE Z80+ in circuit emulator from about the late 80's. I remember getting this at least partly going some years ago, but I got stumped by lack of documentation, particularly on the RS-232 interfacing requirements and command syntax. Searching the web, I found a manual for the original NICE Z80, but that lacks the internal RAM (and other features?) of the later device.Can anyone help, please?

author: nfmax
author_rank: Super Contributor
timestamp: July 01, 2025, 08:35:06 am
content: Necroposting for a reason: I found a copy of the manual!https://bitsavers.org/test_equipment/nicolet/NICE_Z80/125-0061-0001B_NICE_Z80+_Users_Guide_198605.pdf
Multimetro Metrix MX52 - Page 1
Forum section: electronics / testgear

author: Manuel Ferreira
author_rank: Newbie
timestamp: July 02, 2025, 01:41:42 pm
content: Olá a todos tenho um já velho multimetro digital MX 52Já a tempos que não uso mas hoje precisei dele e verifiquei que as medidas que faz especialmente em DC escala automatica deixam de ter o ponto no visor, assim por exemplo 22V surge no visor como sendo 2225V.Aparentemente o ponto que define os décimos de volt parece funcionar até menos de 5V, a partir deste valor não há ponto.Não sei se afeta outras escalas ou não, para já verifiquei a tensão de rede AC e funciona normalmente.Alguém do grupo já teve algum problema semelhante ou tem alguma ideia de como reslover?Obrigado a todosM.Ferreira

author: Sorama
author_rank: Frequent Contributor
timestamp: July 02, 2025, 02:04:17 pm
content: No idea what you’re saying.English please.

author: coromonadalix
author_rank: Super Contributor
timestamp: July 02, 2025, 02:48:13 pm
content: googleHello everyone I have an already old MX 52 digital multimeter I haven't used it for a while but today I needed it and I found that the measurements it makes especially in DC automatic scale no longer have the dot on the display, so for example 22V appears on the display as being 2225V. Apparently the point that defines the tenths of a volt seems to work up to less than 5V, from this value there is no point. I don't know if it affects other scales or not, for now I have checked the AC mains voltage and it works normally. Has anyone in the group ever had a similar problem or have any idea how to reslover? Thank you all

author: Mickle T.
author_rank: Frequent Contributor
timestamp: July 02, 2025, 02:56:30 pm
content: Remove/disconnect the daughter board that contains the LCD and CPU. Remove the two zebra stripes, clean them with isopropyl alcohol, as well as the corresponding pads on the PCB.

author: Manuel Ferreira
author_rank: Newbie
timestamp: July 02, 2025, 04:06:12 pm
content: NOTE: This message has been deleted by the forum moderator Simon for being against the forum rules and/or at the discretion of the moderator as being in the best interests of the forum community and the nature of the thread.If you believe this to be in error, please contact the moderator involved.An optional additional explanation is:
Fnirsi GC-03 radiation/emf meter is released - Page 1
Forum section: electronics / testgear

author: RAPo
author_rank: Super Contributor
timestamp: June 30, 2025, 01:16:50 pm
content: I got an email from Fnirsi.They have a new radiation and EMF meter, theGC-03They claim:Multi-function: Detect gamma radiation, EMF, and electric fieldsCE Certified – Meets European safety and environmental standardsIdeal for radon zones, antiques, recycled materials, or public transportThe first review video is, unfortunately, no crackling sound when a particle strikes the GM-tube.Still, I think I will order one.

author: Grandchuck
author_rank: Super Contributor
timestamp: June 30, 2025, 01:28:30 pm
content: I bought one. It works, but have not run extensive tests.I used an ion chamber source from a smoke detector to check the nuclear radiation function. At a distance of about 2 inches, the alarm tripped.
Keysight DSOX1102G system concerns detected - Page 1
Forum section: electronics / testgear

author: xfwduke
author_rank: Newbie
timestamp: May 17, 2022, 01:50:58 pm
content: hi everybodyAfter a very long time unpluged the power cord, I upgrade 1102G firmware to 1.20 and received the message on screen:System concerns detected:- System clocks is defauted.- The default setup was loaded.I have did some test1. If kept all of the settings default and reboot, there is no warning message any more2. If custom any setting and reboot, the message comes backDoes any one how to fix it?Thanks very much

author: adam4521
author_rank: Regular Contributor
timestamp: May 17, 2022, 08:21:28 pm
content: Battery backed parameter memory? But product seems too recent for a flat battery to be the cause...

author: hli
author_rank: Frequent Contributor
timestamp: March 13, 2023, 05:16:10 pm
content: Even though this is an old thread, it seems the only one in the whole 'net concerning this message.I just saw the same message. Opened up the scope, and sure enough it has a coin cell on the main board. This is a CR 2025 (why not a 2032, come on), and it measures 0.5V without any load, so dead as a brick. And of course this is a size I don't have at handSo when you see this message: open the scope (4 screws for the case, and 9 for the metal chassis inside, all Torx T3), and change the battery.

author: rocketsarefast
author_rank: Newbie
timestamp: June 30, 2025, 01:29:04 am
content: @hliThank you. just happened to me too. I didn't know it had a battery, or a clock.
DL24P load tester schematic - Page 1
Forum section: electronics / testgear

author: helmy
author_rank: Contributor
timestamp: June 29, 2025, 08:42:55 pm
content: Came across this schematic for the DL24P electronic load tester. Thought it might be useful to others messing around with mods or repairs. Posting it here as-is — not mine, just sharing.
Fluke 8845A, spikes on the trend plot - Page 1
Forum section: electronics / testgear

author: vladsol
author_rank: Regular Contributor
timestamp: June 29, 2025, 09:08:31 am
content: With the input shorted, in Trend Plot mode on the Fluke 8845A multimeter, occasional spikes (both positive and negative) appear on the graph.This happens not only in the DCV mode but also in the resistance measurement mode. Is this normal? Has anyone encountered similar issue?DCV:DCI:Resistance:

author: Kleinstein
author_rank: Super Contributor
timestamp: June 29, 2025, 09:39:28 am
content: It does not look normal. At least I would not expect this from a better 6 digit DMM. Without care this can ruin quite some long time measurements.In modern times one suspect is a phone near by (e.g. within 2 m). They occasionally produce high intensity pulses to reconnect to the stations - these can effect instruments via EMI.

author: vladsol
author_rank: Regular Contributor
timestamp: June 29, 2025, 01:40:04 pm
content: I had the same suspicion, but couldn’t find any confirmation of it. I tried placing a mobile phone nearby and uploading data (via LTE, via Wi-Fi), as well as completely disabling the mobile network — none of that had any effect.I also tried powering the multimeter from an isolated power source, but that didn’t help either.Unfortunately, I don’t know how it’s supposed to behaveIn Trend Plot mode, the multimeter is always in automatic range selection, and with the input shorted, it uses the range with the highest sensitivity.While searching for images of the 8845A online, I came across a photo on one of the websites where similar spikes are also visible. There aren't many of them, but nonetheless, they are present.

author: bdunham7
author_rank: Super Contributor
timestamp: June 29, 2025, 03:44:17 pm
content: The trend plot feature can give you some seemingly strange results in corner cases because it mathematically zooms in on a steady or zero reading until whatever noise is there fills the screen vertically. If you could zoom out a bit so we can see exactly how you have it connected or shorted and then tell us what range you are measuring (which the meter does not indicate in this mode) then I can try the same on my 8846A and you can compare. Also, let me know what the settings are for aperture (10 or 100 NPLC), input impedance and whether the digital and analog filters are on or off. The settings I'd generally recommend are 100NPLC, digital filter on, analog filter off and Hi-Z input impedance.

author: Rubo
author_rank: Regular Contributor
timestamp: June 29, 2025, 04:03:16 pm
content: On my KS34465A that only happens if I use my ham radios. Even on low power (1W or less) and half way down my street, the meter still has spikes like that.If you have any neighbors that are hams (or similar) that will screw with your measurements. Not saying that is the case for you, just something to keep in mind.
Fluke netrunner at 2000 software no longer needed - Page 1
Forum section: electronics / testgear

author: bazzatron
author_rank: Contributor
timestamp: June 29, 2025, 07:42:13 am
content: Hi,General request if anybody has software for the fluke netrunner at 2000Purchased one without its cd rom.Thanks in advance.Regards,Barry.Hi,Software no longer required, sourced elseware.Regards,Barry.
Scored a Sencore cr70 for cheap. But, is it broken? - Page 1
Forum section: electronics / testgear

author: DC Jack
author_rank: Contributor
timestamp: June 28, 2025, 08:25:35 pm
content: I managed to pick up a Sencore cr70 for the price of a couple of fancy coffees. Hurray for me!I followed a "field test" document I found online and most of the tests were within the range specified. The two "problem" tests were for Bias Voltages and Cutoff voltage range.There are four Bias Voltages that can be selected, (-20v, -36v, -52v, -68v) with the first two voltages read within a tenth or two but the -52v and -68v settings read -50v and -65v. Is this 'good enough' or is there a problem I need to fix?The Cutoff pot should sweep from 20v to 400v. I am reading 18v to 339v. So, for those that are familiar with these testers, does this need fixing?
HP4284A calibration program - Page 1
Forum section: electronics / testgear

author: Lestron
author_rank: Newbie
timestamp: April 12, 2022, 11:00:49 pm
content: Does anyone know if the 04284-65001/8 HP basic adjustment program has been translated for use on a newer computer than the HP9000 series.I want to run through the cal as shown in the manual, but many steps require the use of the adjustment program.If someone has the original program, I would try to port it to run on a windows or linux computer.

author: ZhuraYuk
author_rank: Regular Contributor
timestamp: November 21, 2024, 12:16:13 am
content: I know this is old post but I would like to get this software in any form for any OS, so far nothing is found on the internet despite that this device is obsolete in Agilent website. Maybe some former employee can share it in personal messages ? I can promise to not share it in public access.

author: zrq
author_rank: Frequent Contributor
timestamp: June 28, 2025, 12:45:25 pm
content: Have anyone got a copy? I can also help adapting it for modern computers.
[SOLVED] artekmanuals.com, having issues?  - Page 1
Forum section: electronics / testgear

author: Cyclotron
author_rank: Unknown
timestamp: June 25, 2025, 07:54:47 pm
content: I placed an order for the 08640-90197 HP manual, but the one I got shows as 08640-90186.My 8640B has a prefix of 1941A, so I need the 08640-90197 copy, which covers my prefix."Dave H" sent me the Dropbox link, and I've tried both email, phone, and the website (send contact info) to contact them, but can't reach anyone.Does Artekmanuals visit here? Does anyone know anything about what's going on? How might I get this issue resolved?Thanks!

author: tatel
author_rank: Frequent Contributor
timestamp: June 26, 2025, 09:08:12 am
content: "Dave H" passed away like two years ago. Since then it is the widow, Linda, who drives Artek. She is not very healthy either. Even with help from some guy, things don't run as smoothly as before.So you can get the wrong manual at first attempt, and/or you'll need to wait, perhaps weeks or even a couple months, if Murphy gets in the way.But it's not a scam, so you can be confident at the end of the wait you'll get either the manual you ordered or your money back.Also, check your spam folder. I got bitten by that at least once. Link was in my spam folder for a couple days when I lost patience and asked for my money back. They refunded me, then I routinely did check my spam folder and found the link, so I sent the money again to Artek.I wish somebody more used to the matter would buy Artek, It is a so useful resource and the quality is so good, it would be a shame to lost it. Linda does the best she can, and I really appreciate her effort. But truth is, Murphy gets in the way much more often now.

author: Cyclotron
author_rank: Unknown
timestamp: June 26, 2025, 04:02:21 pm
content: @tatel Thank you so much for that background! I am very interested in a high-quality manual that covers my 8640A, so I hope Linda reads my email.The website contact form no longer works, and I tried the phone number, but it appears to go to someone unrelated to the Artek business.I will try another email.Thanks again.

author: tatel
author_rank: Frequent Contributor
timestamp: June 26, 2025, 09:05:40 pm
content: Please let us know how it goes

author: Cyclotron
author_rank: Unknown
timestamp: June 28, 2025, 03:01:13 am
content: Quote from: tatel on June 26, 2025, 09:05:40 pm@TatelI am happy to say that after I posted over on the HP groups, someone reached out to me and helped get things sorted.https://groups.io/g/HP-Agilent-Keysight-equipmentI'm happy to have the correct manual. I'm near completion of the work on my unit and I'm ready to put it to use.
programatically reading measurements from Siglent SDM3306 in dual mode - Page 1
Forum section: electronics / testgear

author: omar9000
author_rank: Newbie
timestamp: June 27, 2025, 06:05:30 pm
content: I've got a Siglent SDM33065X-SC and I'm tring to figure out how to write a script that will read two different values in dual mode. I've got the example in the manual, for instance -- a power source and a load. I'd like to read the voltage and the current.Easy enough to set that up on the display. But how can I write a script to record the measurements from the programming interface? I see no mention of dual mode in the programming manual.Anybody have advice on this?

author: tautech
author_rank: Super Contributor
timestamp: June 27, 2025, 06:55:39 pm
content: Quote from: omar9000 on June 27, 2025, 06:05:30 pmThere are 2 manuals:https://int.siglent.com/u_file/document/SDM%20Series%20Digital%20Multimeter_ProgrammingGuide_EN02A.pdfhttps://int.siglent.com/upload_file/user/SDM3065X/SDM3065X_Remote_Manual_RC06036-E01A.pdfIf your answers are not in those contact Siglent NA support:https://siglentna.com/contact-us/

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 27, 2025, 07:09:02 pm
content: Why would you write a script? TestController can already do all of that:https://www.eevblog.com/forum/testgear/program-that-can-log-from-many-multimeters/Thanks,Josh
Analog Test Sequencer - Page 1
Forum section: electronics / testgear

author: slugrustle
author_rank: Frequent Contributor
timestamp: June 27, 2025, 02:24:50 am
content: Please tell me if this exists:I'm looking for an analog "test sequencer" that would have a plugboard style configuration with a bunch of modules:AmplifiersComparatorsAdjustable reference voltagesOne shotsTime delaysLatches / flip flopsLogic gatesOutput driversto use for controlling power supplies during developmental testing before firmware is available.Does something like this exist? Seems like it should...I'm guessing people use other equipment for the same purpose today. Maybe a PLC? It just seems like a plugboard analog setup would be a lot easier to configure on the fly.

author: tggzzz
author_rank: Super Contributor
timestamp: June 27, 2025, 07:23:43 am
content: You don't mention- what form of control you want: voltage, current, or simple on/off.- voltage and current ranges (mA or MA?)- time intervals- whether one PSU needs to have settled before another is changedHow about a PC and PSUs that can be programmed via an RS232/GPIB/Ethernet/USB interface.

author: slugrustle
author_rank: Frequent Contributor
timestamp: June 27, 2025, 07:36:41 am
content: Sorry, by power supplies I mean offline switchmode converters with pretty basic analog control signals:Logic level enable/disable. Usually 3.3V logic, often just an optocoupler LED with current limiting resistor.Analog setpoint for target output voltage. Usually 0V–3.3V. Usually filtered PWM but can accept a DC voltage.Analog setpoint for target output current. Usually 0V–3.3V. Usually filtered PWM but can accept a DC voltage.I would want the test sequencer to be able to monitor output voltage, output current (after an amplifier), temperature (NTC thermistor with pullup followed by an amplifier), or other signals.

author: TurboTom
author_rank: Super Contributor
timestamp: June 27, 2025, 09:08:04 am
content: Rigol M300 test / measurement acquisition systemwith its suitable interface cards?Versatile and powerful but not without its quirks. AFAIK one of the few "budget" solutions available...

author: slugrustle
author_rank: Frequent Contributor
timestamp: June 27, 2025, 04:23:23 pm
content: Looking for something hopefully faster that could shut off quickly in response to overcurrent. Pretty sure the M300 uses a bench DMM and relays for sampling.
HP 5372A Freq / Time Interval Analyzer, Option 040 FFT / Jitter Analysis - Page 1
Forum section: electronics / testgear

author: garrettm
author_rank: Frequent Contributor
timestamp: February 05, 2025, 10:57:09 pm
content: I just picked up an HP 5372A with options 020 (FastPort) and 030 (Input C 100MHz to 2GHz) for $200 USD, which I feel is a decent deal (as optioned, it sold for $33,750 in 1993!). The unit in question turns on with "Error 160: Out of sensitivity cal.". The service manual says this is a dead 3.6V battery on A7 and will require replacing the battery and performing the A2 sensitivity adjustment. So nothing too daunting (in theory at least!).Anyways, I noticed that the 1993 HP Catalog lists option "040 Jitter Analysis", but my unit with SN 3045A doesn't show this as an option on the rear panel. After reviewing the service manual available online, it appears HP made two more major revisions after mine: 3141A and 3301A. Looking at photos of a unit with SN rev 3301A indeed shows "040 FFT" on the rear panel. Clearly, this option was introduced with either revision 3141A or 3301A (I'm not sure which).I was curious if this option was an actual hardware change or a software feature added later on? And, if so, could it be enabled with newer firmware on an older unit? Does anyone know more about this option and if this might be possible?

author: benj38
author_rank: Frequent Contributor
timestamp: February 07, 2025, 05:13:24 pm
content: Looks like a purely software option to me.https://www.artisantg.com/info/Agilent_5372A_Option_40_Manual.pdf

author: garrettm
author_rank: Frequent Contributor
timestamp: February 08, 2025, 08:38:45 am
content: Thank you benj38! The manual states that FW version3127or newer is required. It seems plausible that this software option was introduced with SN rev. 3141A instruments.If anyone would be kind enough to upload a copy of the 3127 or newer FW I would be very grateful.I believe enabling this option will require not only newer FW but flipping one or two dip switches, but I didn't notice the service manual ever mention option 040 so I'm not sure which switch/es need setting. I don't think it would be very hard to figure it out though.

author: aarons
author_rank: Regular Contributor
timestamp: June 27, 2025, 06:52:49 am
content: Did you ever manage to enable option 040 on your analyzer?
Tektronix DMM916 vs DMM870 - Page 1
Forum section: electronics / testgear

author: mainman
author_rank: Regular Contributor
timestamp: June 23, 2025, 07:59:12 pm
content: Feature wise what is the difference between these two meters.

author: David Hess
author_rank: Super Contributor
timestamp: June 24, 2025, 01:01:58 pm
content: I cursorily checked the manuals and did not see any difference.

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 24, 2025, 02:42:04 pm
content: One is blue and one is yellow. Don't swap covers, or the universe will implode.The datasheets look like somebody copy and pasted the whole thing down to the weight and dimensions.

author: bdunham7
author_rank: Super Contributor
timestamp: June 24, 2025, 02:48:40 pm
content: The one on the right attracts the interest of Fluke's legal department.

author: edavid
author_rank: Super Contributor
timestamp: June 24, 2025, 02:54:42 pm
content: Here's a 1997 article about the Fluke Corp. v. Tektronix, Inc. lawsuit that led to the DMM870 turning into the DMM916:https://www.designnews.com/industry/dispute-is-no-fluke

author: mainman
author_rank: Regular Contributor
timestamp: June 25, 2025, 01:50:20 am
content: Thanks for the replies GUYS. I came to the same conclusion after looking at the manuals for both but thought I would still ask the community.So if I swamp the covers all life everywhere will end or at minimal the Fluke SWAT team kick down my door.......I feel both powerful and scaredMy 916 needs serious repairs though, the 870 works perfectly

author: AVGresponding
author_rank: Super Contributor
timestamp: June 25, 2025, 05:18:35 am
content: With the supreme irony that together with Keithley they are all owned by Fortive now anyway.It's a very nice meter, one POI being that the backlight is a grain-of-wheat incandescent lamp

author: Brad O
author_rank: Regular Contributor
timestamp: June 25, 2025, 06:44:51 pm
content: Quote from: AVGresponding on June 25, 2025, 05:18:35 amNot for much longer, Fortive is spinning Tek (& Keithley) into a new holding company called Ralliant but keeping Fluke.
Tektronix TDS Noise Issue after 5MS/S - Page 1
Forum section: electronics / testgear

author: hashtala
author_rank: Newbie
timestamp: June 25, 2025, 04:37:09 am
content: Hi everyone,I recently acquired Tektronix TDS640A that seems to work well except when I increase sample rate beyond 5MS/s, the noise increases significantly. I am attaching some pictures.I know that they have history of pad electrolytic caps but they seem fine when I took the scope apart, seems like somebody has already replaced them. Is there a change they could still go bad and have high ESL or ESR that prevents nice and steady voltage for ADCs at these sampling speeds?Any response is welcomed