Active on KZread only as an electronic hobbyist. Many years ago I studied Electronic Engineering / Computer science. Since a few years ago I revived this electronic area again as hobbyist. Professionally I am working for a long time in the telecom industry in the Netherlands for fiber access projects as domain architect, technical project manager and sales engineer.
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Я так понимаю ,проблему с низким входным сопротивлением в режиме DCV так и не решили .
The workaround is to use manual mode (not auto). Since in Auto it will always go one time through the low impedance phase once you connect the tips to your DUT. Hopefully Rigol will come with a fix I hope......
Thanks for the test friend, I had commented on this in your last video, apparently this has not yet been corrected, as you received a version with the most up-to-date hardware, unfortunately they will have to correct a few more things, my multimeter after I measure a voltage of 400V showed an internal resistance even though there were no tips connected, I have these videos saved. The rigol representative at the time authorized me to open the multimeter so I could try to correct it, I managed to find the defective component, it was a transistor that went on the run after measuring the PFC of a source, if you want, send me an email and I'll send you the videos and photos of this defect that occurred and the component that I replaced to correct it.
Good day. Thanks for your reply. I am very interested in your videos and photos. I would be nice to understand more about the (bad) design of Rigol. My email address is [email protected] Thanks a lot !!
Thank you for documenting all of this.
i thought the issue was only for DM858E,my hardware version is 1.0
I guess the Analogue Front End of the 858 and 858E are the same. The old issue for repairing the Autoscale 28-40Volt seems to be solvable via :SYSTEM:CFGVER 1, also on HW1.0 But the new identified low impedance issue is something else (for me).
А в чём обновление заключается ? Ток как подпрыгивал в автоматическом режиме так и подпрыгивает . Смотрите внимательно на блок питания , при переключении с 0,1в на 33в . 26мА это достаточно много что бы пожечь чувствительную к нагрузкам цепь .
источник заряжает свои вых. конденсаторы в момент включения вот и потребляет) Рения была значительная ошибка в работе. посмотрите другие видео
Hi, can you let me know which supplier you used? The one I used in Great Britain is not really keen on replacing it with new hardware. They sent me some config to run and it seems to solve the dcv measurement issue. The SCPI command is :SYSTEM:CFGVER? but if it does not show 1, it is :SYSTEM:CFGVER 1. Rigol says it "changes the DC voltage 100mV and 1V gear configuration".
I have bought the DM858 at Eleshop in NL. And I know that they returned my old device to Rigol Germany (on request of Rigol DE after my initial complaint in April). Then there was a long time silence, and finally they intent to ship a HW1.0.1 version as result (E). But they have never confirmed that the problem was solved or whatsoever. No info. But I checked last week after receiving my DM858 and made a video of the result. So I assume HW 1.0.1 is the solution since the SW is still the same (1.00.00.20). BTW: I just enter :SYSTEM:CFGVER? and the result is 1. I assume the config file you received from your supplier didn't work? I didn't know that this could potentially solve the DCV autorange issue.
@@marcelmostert3081 I had the same config update suggested to me by my supplier here in the UK, and it has in fact resolved the issue with the meter not correctly showing voltages above 32v or so.
@@richardstaz721 Thank you very much for this information from Rigol. It seems to work on my DM858. Above 32V the display is fine. It would be nice if Rigol could share this with all his customers from his websites...
Hi, yes this solves dcv issue but the multimeter is still draining current so it is not a full solution
@@dragon_v I see no appreciable current drain, it measures some 3µA and is the same whether using a Fluke or the Rigol. The fix looks fine to me.
This thing front end is built around HY3131 chip which is used in 50USD handheld multimeters. There is like 4 details in it HY3131 + Resistive divider network + Relays, nothing else. Fair price for this device would be 100USD.
Interesting info. HY3131 has 50K count according to their datasheet, while DM858 and DM858E has 120K count. Do have some more info about your claim? I would expect that the ADC of the DM858 is also different then the DM858E. I am not planning to do a teardown due to warranty, but I love to see such video.
@@marcelmostert3081 Check EVVBLOG forum topic "Rigol's New Function Generator and DMM: DG800Pro / 900Pro / DM858" page 6. There is photo of front end, it consist of only ONE chip.
Thanks! Although I could NOT identify the ADC (HY3131) on those 2 pictures from "cshui17" on page 5. And again 50.000 counts is not applicable for DM858 (and E)
Hello Marcel, Great news about your new DM858 in version 1.01. Most of the problems have now been solved. Hypotheses of a software update to solve the problem seem lost since you're still in 1.00.00.20. In short, I'm not sure that all retailers will agree to return the product to Rigol for an upgrade. Most will turn a deaf ear unless Rigol makes the approach to its distributors. We'll see... In the meantime, thank you for this long-awaited video and good luck with your further investigations into your new DM858. Best regards.
Hello Frank, I am afraid that you are right regarding deaf ears. Are you trying to get a HW 1.01 also via your distributor. I hope you will succeed if you want to take the effort. In my case it took totally 2 months (including an owned trigged swap from E to non-E). Kind regards, Marcel
Good evening, has the slowness in slow mode been improved? then do a test asking for the PFC sector of a power supply, my old DM 858 which corrupted the firmware and I had to return it to the seller, when measuring a voltage of 400v on the PFC capacitor in automatic scale a large spark came out from the tip.
Hello, I didn't notice a faster "slow" mode. I guess nothing has changed there. About the 400volt: Do I get it right that you put the DMM in DVC autorange and then you start to measure 400V DC. Did it display 400V or was the meter directly defect? (after the sparc) It should be capable up to 1000V if I look to the specifications. Did you receive a new DM858 from the supplier?
@@marcelmostert3081 If you leave the multimeter on automatic scale and directly measure 400v, a spark will come out of the tip when the multimeter changes from the 1v scale upwards, this was a defect that also occurred in mine, I chose to return the amount paid and bought a hantek hdm3065b , because in addition to the dm858's bugs, I didn't like the slowness and the fact that when I put it in medium or fast mode, it turns into a 4-digit multimeter.
Correct, in medium/Fast one digit is removed. With your spark out of the tip I will check this also. Anyway, do you like the 6.5 digits hantek meter - also in the different measurement speeds? Any bugs there?
Good evening, I think I found the root cause of your corrupted DM858. It appears that the impedance is very low for a short duration (and strangely enough how higher the DC, how lower the impedance). I measured 1500 ohm at 56-66Volt. But with 400 DC, I don't know, but I guess enough to generate sparks....and destroy your multimeter. This situation of low duration is only for around 150-220ms and occurs when the autorange has to scale up from <1.2 Volt to the higher ranges. I know you have meanwhile another multimeter of hantek. kzread.info/dash/bejne/q36XlrmDntDUfqQ.html
Nu is de vraag of de E versie ook verbeterd is, die vind ik al duur genoeg voor de heb 🙂
Ja, die is ook verbeterd. Ik heb een foto gekregen van Eleshop van een nieuwe 858E en met HW1.01 die voor mij bedoeld was als retour.
@@marcelmostert3081 Bedankt, dat geeft weer vertrouwen in elk geval. Je kan deze netjes met een zwenkbare monitorarm aan de muur hangen, best handig.
Having just received a DM858E here in the UK, I can confirm the same fault at higher voltages, 35v, in Auto. My Hardware version is showing as 1, and software as 1.0.0.20. It is very odd that Rigol could release a meter with such a fundamental problem, and then 6 months later, the problem remains unfixed.
Tomorrow I will get a new DM858 from my supplier. I will let you know if the problem is still there. It should be coming with the "latest" hardware version - but I am not sure what that means. Note: I know there is at least one DM858E out there with a HW 1.01 version. They were planning to ship it me, but I asked if I could upgrade it to a DM858 non-E version, assuming it would contain HW 1.01 and that it would fixed the DCV autorange failure. I didn't got a clear confirmation about that - except the price difference bill for the non-E version, that was clear :-) . So I am little excited for tomorrow.
Let us hope that Rigol have identified and fixed the problem on your updated meter. Good luck.
I’ve noticed another odd thing about the meter, when measuring ohms. In many cases the autoranging shows values as a decimal of the range, ie 330 ohms is displayed as 0.325K or 270K is displayed as 0.268 Mohms. Switching from Auto to a manual range doesn’t work as an Overload message is displayed for what should be the correct range. It’s not incorrect but not as convenient to read as 330 ohms or 268K ohms, as my Fluke meter displays. A poor design decision. I hope you’re having better luck with your replacement meter.
Any progress on the fix for this meter?
It seems to be that I can expect a new meter on July 6th. I will make a video of it.
Thank you Marcel for this news. The hardware is now H1.01 on the model you're about to receive in DM858! Let's wait until you've received your new DM858 to check the firmware number too. I'm not sure what to make of all this... Have a good week and thanks for your message.
Hi Frank, I received my DM858 yesterday. This evening I made short video of it. It is indeed with HW 1.01 (while same .20 SW). I think they change some components in the front end regarding the overload protection. Have a nice evening!
Thanks for sharing
Hello Marcel. I'm sending you an interesting link about the DM858. The same applies to bugs. Best regards. kzread.info/dash/bejne/aWuE1ZuEqMa1YcY.html
kzread.info/dash/bejne/aWuE1ZuEqMa1YcY.html
Hello Marcel. I'm sending you an interesting link about the DM858. The same applies to bugs. Best regards.
Hello Frank, thanks for link. Meanwhile I had an update from my supplier (Eleshop). They received the 858E back from Rigol Germany and they did some test at the location of Eleshop. But they didnot check the DCV autorange test. They sent some picture where I saw Hardware Version 1.01 (so not 1.00). I was happy and I thought this might be solving the DCV autorange problem. As this was another 858E device from Rigol Germany (different serial number then my original one) I ask them if it was possible to change it to a 858 (without E) prior sending the 858E back to me. That was possible after paying the price difference. But now I am waiting for the 858 because it was not in stock. I asked them if the 858 has also HW 1.01. They were saying it will be the newest HW. Let see what it will be. Hopefully I will get the 858 end next week (my guess). Best regards
Hi. I bought this generator and am a little disappointed that it does not have a web interface like an oscilloscope. And there is no support for the Russian language. I wanted to update the software, but I don't know how to do it. When connected to the Internet, it does not update itself (it is quite possible that this is its maximum version from 2023 at the moment)
Hi, my device is supporting the web interface - the same thing as an Rigol oscilloscope. From Language perspective: there is only English or Chinese to select. Current version I have (out of the box) is 00.01.00.00.21. And I didn't do any upgrade.
@@marcelmostert3081 ha ha, I was inattentive and connected the generator from another local network, but now I have corrected myself and the web interface works 😁
Diode function have beeper same fluke? Thanks you
Unfortunately, I cannot check as my device is still in "repair" at Rigol
I recently bought a rigol dm858, after 4 days of use, its firmware corrupted in normal use, I was unable to recover the firmware and had to return it, the errors I managed to diagnose. 1st in automatic scale does not measure voltages between 32v and 40v, generating a consumption of 24ma. 2nd In automatic scale, if measuring high DC voltages in a PFC circuit, it generates a strong signal on the test tip. 3rd in slow mode the multimeter is extremely slow. The first two errors occur due to the change of scale from 1v to 10v where a relay is activated, this activation generates consumption. After 3 days of use, the multimeter showed a defect measuring 3Mohms and on the diode scale it showed a drop of 1,100v even without the tips connected, an internal NPN transistor in the multimeter leaked, its location is Q1, I opened the multimeter with authorization from the supplier Due to the warranty, I replaced the transistor and the defect was resolved, however, the next day, when using the math function and pressing the OK button, the multimeter system corrupted and I returned it. I recorded all these bugs that occurred, unfortunately the problem is hardware and not software. comprei um rigol dm858 recentemente, com 4 dias de uso a firmware dele corrompeu em uso normal, não consegui recuperar a firmware e tive que devolver, os erros que consegui diagnosticar. 1º em escala automatica não mede tensões entre 32v a 40v, gerando um consumo de 24ma. 2º Em escala automatica se for medir tensões DC altas em circuito PFC gera sentelha forte na ponta de prova. 3º em modo slow o multimetro é extremamente lento. Os dois primeiros erros acontecen por conta da troca de escala de 1v para 10v onde há um acionamento de um relê, nesse acionamento é gerado um consumo. Com 3 dias de uso o multimetro apresentou um defeito de medir 3Mohms e em escala de diodo apresentar queda de 1.100v mesmo sem ponteiras conectadas, um transistor NPN interno no multimetro apresentou fuga, localização dele é o Q1, abri o multimetro com autorização do fornecedor por conta da garantia, troquei o transistor e o defeito foi resolvido, porem no dia seguinte ao utilizar a função math e apertar o botão OK o sistema do multimetro corrompeu e devolvi. Gravei todos esses bugs que ocorreram, infelizmente o problema é de hardware e não de software.
This is really bad. I have worked a few weeks with my 858E version before I sent it back for "repair" due the DCV autoscale (32V / 24 mA) issue. It looks like the Hardware is not designed very well. Same applies if you have negative Overload. It shows no sign (so positive), which is incorrect. Especially if Trend scale is on. Will you get a new one?
@@marcelmostert3081 I returned the multimeter, it had only been 4 days since I bought it, I tried everything but I couldn't reinstall the software.
This is not great from a brand like this. What I also find "interesting" is that these newer models (over the DM3058[E]) the counts are lower. This seems to be a trend with Rigol? the DM3055 model had 480.000 counts, the later 3058 240.000 (or at least aound 200.000 counts) and now this latest model only 120.000. This fact alone is a big turn off for me already.
Yes, Marketing calls it 5 1/2 digit :) But it is only 20% over 5 digits. It is the bare minimum now. Wondering if Rigol 6 digits (6 1/2) will come out in this form factor - they have first to do a lot of HW reworks.
Do something with intro volume
Yes, you are right. It is much too loud - I corrected hopefully in my new follow up videos. This was my first YT
You persuaded me, I ordered one for myself and now I'm waiting for it 🤣👍
Hello Marcel. I've been looking forward to your second video. I received my DG922 Pro yesterday and tested it last night. The first noticeable change is that the USB-C power connector has a side-pressure locking clip. This should undoubtedly help to relieve the mechanical stress on the soldered joints of the USB-C socket when the generator is often moved (mounted on a VESA mount, for example). Do you have a new type of USB-C connector on your USB-C power supply? Apart from a bug when my generator started up for the second time, with all the buttons on the front panel and on the touchscreen locking up, after rebooting everything was back to normal. I've restarted it several times and I haven't noticed this problem. The fan only kicks in after several long minutes of use, especially when I turn up the frequency. It's a shame, as it's noisier than the one on my DHO924S oscilloscope. As for the B type, which is unavailable when using the frequency meter function, this was already the case with their previous DG2072 model, which a French youtuber had mentioned in the past: kzread.info/dash/bejne/pqGTuNN8h7C_Y5c.html . And as with the old DG20 generation, it's a shame that the frequency meter's voltage input dynamic range (5V) isn't greater. Thanks to your video I discovered how to use the harmonic function with the prefix X followed by 1 and 0. Really cool. I'm discovering the PDF documentation as I go along and your explanations are really useful. Thanks to your video, I've discovered how to use the harmonic function with the X prefix followed by 1 and 0. Really cool. I'm discovering the Rigol PDF documentation as I go along and your explanations are an excellent support. I'm also very interested in the auxiliary outputs at the rear, as there's also the possibility of generating a marker when using the SWEEP function. For me, this is essential when you want to quickly assess the bandwidth of a device. Not yet tested... The DG2072 generator can also generate a DUAL TONE signal and an RS232 sequence. I don't know if the DG822 Pro and its variants allow this. I haven't had the time to delve into all the waveforms yet. I see you haven't got your DM858E multimeter back yet. Let's hope they have a solution for you... Until your next video tests, I wish you an excellent discovery with your DG822 Pro.
Hello Frank. Thanks for you comments - I appreciate your feedback very much! Also congratulation with the DG922 Pro. I really nice to have 200Mhz. In my case was wondering if some upgrade options are existing to 50Mhz, but I could not find it. Only an option for more memory. Regarding the USB-C, I could not find a side-pressure locking clips (I think it is the same as DM858E - which is still in "repair" :-). It make a lot of sense indeed to reduce the mechanical stress. In my case, everything is on the bench a little static. The topic related to CH2 and Freq Counter is maybe not a big deal. I have the same restriction on my Feeltech FY6900. But as the datasheet states "independant" I understand now they only meant a own front connector in stead of sharing a single CH2/Counter BNC. Now also understand that old model has the same restriction. I was wondering how this works with Siglent... The Fan, yes.... this is really nasty. The sound it starting to produce after a few minutes is really loud. I had assumed that the loudness of the fan would be same as DHO800/900 series oscilloscope as it using the same form factor. But I learn from you that is not the case. Also my DHO1074 is not quiet. But the DG is indeed much louder. Maybe I will change fan in the future. I have still to checka lot and verify - e.g. triggers - 10Mhz connection, and the ARB functions etc. Meanwhile, I could not find an import/export function for ARB - maybe I have overlooked this. I also didn't see the DualTone/RS232 either. I will continue with some more video's after some DG exploration. If I have received my DM858E back from Rigol I will immediately share the results. Thanks again Frank, and enjoy with your new RG922Pro!
@@marcelmostert3081 Hello Marcel. Thank you for your reply. Regarding the upgrades of your DG822 Pro to 50MHz, the PDF documentation doesn't mention it and no information on the Rigol website. I looked on the internet, but couldn't find anything like you. In fact, like you, I've just upgraded to more 32M memory from the Rigol site. This 25MHz limitation should be able to be modified in order to move upmarket. To be seen in a few months... For the problem of the clock being synchronized to the Chinese time zone, I simply disconnected the DG922 Pro from my Ethernet network. This keeps it on the right time and I don't use remote control via the network. However, given that the OS runs on Android, Rigol's engineers could add a time zone selection option to the DGxxx Pro's settings. As for the DG922 Pro's fan being louder than on my DHO924S, here's a plausible explanation. KZreadur Dave from EEVblog explained that the fan placed in his DHO814 was powered by the oscilloscope with a voltage of 8V instead of 12V (fan manufacturer's reference 12V - 0.14A). As the fan is not running at maximum speed, noise is much lower on the oscilloscope, even though it must generate sufficient airflow to keep the temperature within acceptable margins. He explains it here: kzread.info/dash/bejne/oquHmKqnfZy2dNI.html However, given the noise generated by my DG922 Pro after 5 minutes of warm-up, it could be that Rigol is powering the generator fan at 12V at maximum speed. As this DGxxx Pro product is very recent, I have no idea of the internal structure of the PCB. From what I can gather, there are three FPGAs (AFG, AWG and Counter) and no doubt a Rockchip processor. All this must be heating up nicely, and probably a lot more than on our oscilloscope with the same form factor. Dave, a great fan of opening measuring instruments, will soon let us know, I hope! For the locking clips on the USB-C power supply, I've taken several photos that can be downloaded from this link. If you're interested, I've put together a ZIP file of my photos of my phone: www.grosfichiers.com/2e45jrkdBc5 Here you can see my two USB-C power adapters, the one for my oscilloscope with the classic USB-C connector and the one for the function generator with a USB-C connector featuring a locking system with the Rigol brand name. As for the restriction on the CH2 and Counter frequency meter, I watched a video on the Siglent SDG1032x generator and apart from its 200MHz frequency limitation of the Counter input positioned at the rear of the device, the KZreadur doesn't mention any restriction on one of the CH1 or CH2 inputs. Link to this video in French: kzread.info/dash/bejne/fmFtpKeSepbAgNo.html I found and successfully tested the Dual Tone function, which works perfectly. The FFT analysis gives exactly the expected spectrum, and the proposed settings are very interesting. On the other hand, I've looked at the PDF documentation in detail and there's no support for the RS232 protocol, unlike Rigol's previous DG2000 generator model produced in 2021. A great pity... ue Rigol. Like you, I haven't found an import/export function for ARB arbitrary functions. The documentation doesn't refer to it, and I don't think it's possible. Again, this is a pity, even if the number of ARB functions is very large. What's more, a PC signal editor would have been perfect, as with the FeelTech FY6900 - 60MHz which I also own and still use, even if it remains rather limited. The generator's 10MHz connection operates correctly at the output. It delivers a square-wave signal of approximately VPP=3.28V without loading this 50-ohm output. I tested the trigger in Sweep mode to measure the bandwidth of my oscilloscope. To do this, the generator's rear BNC "CH1 AUX IN/OUT" is connected to input 2 of my oscilloscope (oscillo trigger active on input 2). Channel 1 of the oscilloscope displays the sinusoidal signal in Sweep mode, evolving in frequency between a minimum and maximum value, in this case 200MHz. However, I found that the frequency setting of the "Mark Freq" marker behaved a little strangely! Let me explain. From Sweep mode, after setting the frequency excursion of the sine wave, I select the "Channel" menu at the bottom of the screen. From this menu, I set "Sync : On", "Mark: On" and enter the frequency of my marker in "Mark Freq" using the keyboard or touchscreen. Thus, I can see on channel 2 of the oscilloscope (connected to CH1 AUX IN/OUT of the generator) a rectangular signal whose rising edge is in sync with the start frequency and a falling edge with the stop frequency of the Sweep mode. To modify the position of the marker's falling edge, I select a digit in "Mark Freq" (e.g. digit "1" in the "Mark Freq: 100.000,000,000,000MHz" display). I can decrease the frequency by turning the large circular knob on the front of the generator. But I can't increase the frequency with the same big knob!? To increase the frequency, I have no choice but to enter a higher value in "Mark Freq" using the physical keyboard or touchscreen. The use of this large circular knob in either direction would have been judicious. This choice is rather curious and not very practical in use. To activate PWM modulation, the documentation indicates that a "Pulse" waveform must first be selected. Rigol could have automated this specificity instead of graying out the PWM selection in the drop-down menu. Finally, I quibble. The Seq function also works very well. I just did a test with 4 waveforms chained one after the other of different periods. It's really excellent and quite unusual. As for modulations, I only tested AM modulation. The FFT was exactly what I expected. I still have to test the other modulations, the frequency counter with the +/-5V maximum amplitude restriction, screen saving on external storage media, etc... To date, I'm delighted with my new generator, even if it does have a few oversights. Thanks for the tests and videos. A valuable source of information that makes it easier to master this device with concrete examples. Looking forward to the return of your DM858E, I wish you all the best with your DG822 Pro, and good luck with your video production and editing.
Hello Frank, thanks also for your reply. I missed it, due to some wrong YT comment filtering which apparently, I had active. Here my late feedback. Yes, I know that there is no 50Mhz option for me, but I would argue - the HW is probably the same (within the DG800 range). But let’s see, I am not really looking it for time being... Indeed, the clock works correct if you not connect it to the Internet. It is the same I think with the DM858(E). Oke, I was thinking - because of the same formfactor your DHO924S would make the same noise as the DG8xx or DG9xx. But it is even louder. For me it is loudest device I have - a shame! Thanks for the Dave Link BTW. Indeed, I hope Dave want to do a tear down. I don’t do it because of the warranty. Thanks also for the USB foto’s. I didn’t have those, and indeed it looks better against stress! I thought the DG8xx/9xx would be the same in this perspective - bit it is not. My DG822Pro I bought it via Aliexpress and I found my power adaptor connector 230V AC a little weird for the EU. So I am wondering if the DG8xx bought via an EU reseller it might as yours (or it is because of the more expensive DG9xx range?) Meanwhile I have seen indeed that the use of the Counter input is coming often with cost of disabling the CH 2 (at least at Rigol, I am not sure with Siglent). Also want I missed is the COUNT function. My FeelTech FY6900 it is implemented. I will show it maybe in a later video. I test some Burst functions, which works fine. I did some test this weekend with some triggers (+output), and it looks OK sofar. The 10Mhz, good point, I will test it together with my DH1074 (has also 10 Mhz). I will also test (next weekend?) youre Sweep procedure - incl Mark Freq change with the big knob! I will let you know (or via video) There a still more things to explore with the DG. More then with the DMM 😊 (which I still didn’t receive back yet from Rigol) Thanks again for your comments. It is very useful. I might use it in one of my follow up YT video. Meanwhile, have fun with you new DG922Pro!
@@marcelmostert3081 Hello Marcel. Thank you also for your response. I posted this message on Thursday, but it doesn't appear on KZread, or maybe it was me who made a mistake. So I'm reposting this message this Sunday. It was a busy week and I didn't continue my tests on the DG900. I didn't even turn it on! I agree with you, the frequency limitation at 25MHz is only purely software and it must be possible to unleash this generator at 50MHz or perhaps more up to 200MHz? However, these software modifications lead to the loss of product warranty it seems to me. In terms of fan noise, the DG8xx/DG9xx are indeed very noisy. Fortunately the DM858(E) doesn't have one, phew! Perhaps future hardware versions of these models will have improvements at this level... For my part I have version 1 of the hardware. Regarding the USB connector, I found a post from someone with this new USB-C connector on EEVBlog. Perhaps Rigol did not yet have the new mains power versions to deliver the first models of its new range (oscilloscope, multimeter and function generator). Pure hypothesis... Here is a photo of the DG8xx/DG9xx PCB: www.eevblog.com/forum/testgear/rigol-just-launch-its-new-function-generator-dg800pro-900pro/?action=dlattach;attach=2082416;image Here is a photo of the DM858(E) PCB: www.eevblog.com/forum/testgear/rigol-just-launch-its-new-function-generator-dg800pro-900pro/?action=dlattach;attach=2082422;image Contrary to what I thought, there is no longer a processor from Rockchip for these two models (DGxxx and DMxxx) unlike the DHO8xx/DHO9xx oscilloscope. A daughter card brings together a new processor and associated RAM and other circuitry. Take your time to test all the features of the generator and to make the next video. For your information, the French Rigol site has removed the reference DM858(E) from its list of multimeters since this week. Weird ? fr.rigol.com/fr/products/products/multimeters Very good week to you and we look forward to reading you and seeing you testing the DG800 Pro.
Hello Frank, this time I red your last comment today (Monday). As it was a busy week either I didn't make a follow up DG video yet (although content enough). Maybe this week if I have some time left. Regarding the freq limitation of 25Mhz: My DHO1074 scope had an option to upgrade the 70Mhz into 200Mhz via a license key. Somehow, I had to expect to see it back in the DG. It is not a big thing for know. Maybe it will come. And indeed, warranty is at stake for the DG (and like the DM I think I need it :-). Also still no update from Rigol service team yet. I will contact my seller this week to ask about it. Indeed, why is the France Rigol site removing the DM? On the Rigol EU site it still there. But something is happening there. We will follow it. I wish you also a good week and thank you for your support. I appreciated it very much!
Hello, my friend! Did you manage to fix your multimeter?
Still in repair by Rigol - expecting within 2 weeks.
HI Did you receive any update from Rigol about this issue?
Hi, not yet. I expect an update within 2 weeks. Once I have my DM back I will post another video with the results.
Hello Marcel. We both had the same idea! After buying my DM858 with its many bugs, it didn't discourage me from buying their function generator as well. I placed my order with a French distributor yesterday morning and should receive it within 15 days... I've chosen the DG922 Pro, which is a bit expensive, but I hope it will give me total satisfaction. With my DHO924S oscilloscope bought in February, I'll soon have the whole Rigol range in this compact mini format. I really enjoyed your video and note that the function generator operating system still takes a long time to load into memory. Let's hope this instrument doesn't bug like the DM858(E). I look forward to following your next videos on this instrument.
Hi Frank, very nice to see that we have the same thoughts. I had the idea about the Rigol DG for a while (despite the bugs in the DM858(E)) but was delaying the purchase of the DG822pro. I hope we can exchange some experience. I will make a video next week - (I am quite busy with my professional work this week) - but yesterday evening the closed box was on my desk, as a kind of surprise, I really needed to unbox it. I was a little excited..... so therefor the quick video.... We keep in touch !!
@@marcelmostert3081 Hello Marcel. We'll be in touch, of course. Take all the time you need for testing and for your next video. It takes a lot of time, and you might as well do it calmly and without hurrying. Your criteria for choosing this new Rigol model are exactly the same as mine. I really like the form factor of these devices, the touch screen and the shallow depth of the instrument. I look forward to exchanging experiences on this latest DDS generator. For the moment, my order is in preparation, in short, I have no delivery date for my new toy! Have a good week and discover the DG822 Pro.
can you recommend it for his price ($350-400)? for me too hard to find siglent or spent 700$+ on another device
Assuming Rigol will fix the DVC issue, I can recommend this meter if you like the formfactor (big screen) /GUI/mouse interaction. Alternatively, I would suggest a SDM3055 of Siglent, but if Siglent is difficult to find, then why not this Rigol. I will do make an update of the YTvideo of the Rigol after they return my device. Maybe you can wait?
@@marcelmostert3081thank you. I'll be waiting for your updates. I’ve been using the DHO804 for six months now and I’m satisfied with almost everything (there are a couple of bugs, I couldn’t reproduce them), so this form factor is convenient for me.
Would you buy the siglent over this meter? I like the form factor but it seems many issues
Thanks for your great video. I wanted to buy it first. But then I bought a Siglent SDM3055. Luckily that was the better decision :)
I couldn't agree with you more. I would have done exactly the same given the too many bugs encountered on this DM828(E).
Yes indeed, the SDM3055 was also on my shortlist. I couldn't find a KZread review for the Rigol at that time. So it was a educated risk :( Question: Can your SDM3055 also displaying a negative Overload. E.g. " - OVERLOAD" and "+ OVERLOAD" ? As my Rigol is displaying always "OVERLOAD" for both cases the corresponding Trend Chart is wrong. But I am curious to see how other brands handling that situation.
Yes indeed, the SDM3055 was also on my shortlist. I couldn't find a KZread review for the Rigol at that time. So it was a educated risk :( Question: Can your SDM3055 also displaying a negative Overload. E.g. " - OVERLOAD" and "+ OVERLOAD" ? As my Rigol is displaying always "OVERLOAD" for both cases the corresponding Trend Chart is wrong. But I am curious to see how other brands handling that situation.
Hello and thank you for this latest video on the problems with the DM858E and DM858 models. I've just done the same test with my DM858 and I still get the same bug when I'm on the 1 volt gauge in manual mode. I haven't had time to look at the clock problem. As for the system version, apart from the different serial number and calibration date (2021-01-18 for mine), all other parameters are identical to yours. Looking forward to the return of your DM858E from Germany after Rigol has inspected the problem. We still believe!
Hi Frank, thanks for confirming the same 1 V bug and other parameter settings. As soon I have my DM858E back I will retest and publish a KZread video of it. I hope also that Rigol is working on the other SW bugs meanwhile.....
Ik wacht wel op HW versie 2 🤔
Ja, dat is geen gek idee inderdaad.
The behavior during the negative overload, even though it's a gross problem and shouldn't have been allowed to pass through the product engineering, doesn't look like a softare problem, but rather to the input analog front end, most prticularly the input op-amp. What it shows so clearly in the waveform and in the bargraph as well, resembles A LOT what is known as Phase Reversal, which happens to certain op-amps (especially FET input op-amps) when one of its inputs is pushed past the op-amps input common mode voltage range
Thanks for the answer. I am not sure, but I thought that Siglent Bench Multimeters SDM30XX does have a negative Overload indicator. It seems that Rigol is taking a different design approach. If this not solvable via a Software update then I wonder if Rigol will come with a future hardware update. I will watch this closely.
@@marcelmostert3081 Well, I can't be 100% sure, that it's an Op-Amp phase reversal effect, or some software bug. It just seems soooo much like phase reversal that it would be too much of a coincidence if it's not, and instead would be a software bug that behaves exactly like Op-Amp phase reversal. Anyway, if it's phase reversal, it can be remediated by increasing the power supply rail that the input voltage is getting too close, and clamping the input voltage before it reaches the point of causing phase reversal. Or changing the Op-Amp altogether, for onde that doesn't exhibit this quirk.
thanks for the speaker test...
Yep same bug, tested on a lineaire power supply and a smps. Latest firmware. DM 585
Extra info...if I try a couple of times, it start to work. Not good though
I noticed that when the device is longer switched-on the problem - or the voltage range in error [28V--50V] - becomes smaller) -> Some temperature effect?
Tengo el DM858E y me falló cuando hize la medición de 380v en fuente PFC. Solo funciona en función manual (en auto no funciona) y las funciones de Ω, diodo capacitor etc.. no funcionan😢
Good evening, I think I found the root cause of your corrupted DM858E. It appears that the impedance is very low for a short duration (and strangely enough how higher the DC, how lower the impedance). I measured 1500 ohm at 56-66Volt. But with 380 DC, I don't know, but I guess it destroys your multimeter. This situation of low duration is only for around 150-220ms and occurs when the auto-range has to scale up from <1.2 Volt to the higher ranges. kzread.info/dash/bejne/q36XlrmDntDUfqQ.html
@@marcelmostert3081 muchas gracias, me dieron garantía y hubo cambio de equipo, ahora con el nuevo la función DC la uso manual, no automática.
@@ilex2288 Also thanks. Indeed, not using the Auto range function is the best option. Have a nice evening.
Rigol is definitely racking up the bugs with this DM858(E). Let's hope that future updates will resolve these problems. Otherwise, I'm switching to its competitor Siglent.
Yes, I hope that they fix it very soon. It is of course a new product, but maybe a little too early on the market. Let's see what will happen. (I didn't got a follow-up via my supplier Eleshop yet - regarding the DCV failure - 2 weeks ago)
@@marcelmostert3081 I received my DM858 much sooner than expected. I did the last firmware update 00.01.00.00.20 and I get exactly the same bugs. There's nothing more we can do, the ball is now in Rigol's court.
@@marcelmostert3081 Thanks for the follow-up.
I am planning to buy rigol, dm 858e, your final advice  
My works perfect. 🤔
Which Hardware version do you have?
I ordered the DM858 10 days ago from Conrad (France). Received the product not before the end of April. I will update to v00.01.00.00.20 dated 2024_03_28. We'll see if I find the same problem. This bug is totally unacceptable from a manufacturer like Rigol.
I am very interested to see if the problem is still there or not on your future DM858. Version 1.00.00.20 didn’t provide a solution for this bug (I retested it). I am afraid that it might be hardware related. It looks like the protection mechanism is kicking in before the Autorange can scale up. I would assume that the protection mechanism is not relying on Software. But we will see how Rigol will solve this problem.
@@marcelmostert3081 I received my DM858 much sooner than expected. I did the last firmware update 00.01.00.00.20 and I get exactly the same bugs. In short, we're waiting for the next update, which will correct the problems. Bad point for Rigol. 😒
@@frankkudelsko1561 Thanks for checking. Good to know that you have the same bugs - so irrelevant if it is a 858 or 858E model. Meanwhile I received the info from my supplier that they have found the right person of Rigol to take care about the DCV-failure topic. But no update received yet.
@@marcelmostert3081 Good news if your supplier has found a contact at Rigol. Now it's going to take some time for Rigol's engineers to provide a fix for the various bugs described in your videos.
Hola, mi pregunta general... El mío falló cuando hice medición de 380v. En función auto rango no me funciona, pero si lo cambio a manual si me funciona, tampoco me funcionó ya la función de Ω , diodo, capacitor ..... Me pide el vendedor que se lo regrese pero desde México a China lo veo difícil
talvez tenha problemas com cabo de força, pois no video eu acho que deveria inverter os cabos do own com rigol.
I have changed the cables - not showed on the video - this gave the same wrong result. From another user who has also the DM858 (not E version) does have the same problem. So unfortunately, it is really a bug. Question now is: Is it hardware or software.
Vette bug zeg, dit verwacht je niet van Rigol, ik blijf dit volgen.
Ja inderdaad. Ik ben kennelijk niet de enige.
Reinstall firmware if possible ....
I have upgraded to the latest release (.20) and the bug is still there.
Uma pena. Iria comprar um essa semana, vou aguardar novas atualizações :(
Hola Marcel, hay un nuevo firmware para ese equipo, está en es.rigol (con punto com), tal vez sería bueno lo pruebes. Saludos.