CEM DT-9989 Multimeter - Teardown & Review

An 'in depth' review of a waterproof multimeter. This video is an unboxing, teardown and review of the CEM DT-9989 Multimeter - an IP67 rated Water-resistant TrueRMS Multimeter / Oscilloscope with data logging and Bluetooth connectivity.
I was reccently contacted by a large electronics distributor who I'd not heard of before called Reichelt. They're a German-owned retailer who have been around since 1969. In March 2016 they opened up shop in the UK, so we've now got a market leader with competitive pricing and good stock levels to compete against RS/CPC/Farnel. Hooray for another player in the market and more choice for us customers :-) They mostly concentrate on tools and soldering equipment, but I found lots of interesting items when I was browsing through their site. They offered to send me anything I liked from their catalog (up to a certain price limit) for review. I'd been thinking of getting myself an OLED-screen multimeter for a while now, so I jumped at the chance to get my hands on a very capable looking meter and have a play around with it for a few days. Check out their website at www.reichelt.co.uk
This video is rather a long one, but there were a hell of a lot of features on this multimeter to cover. It took me several days (and about 10 hours of filming) to try out all of the different things that this multimeter can do, and then another entire day to edit down all the footage into a watchable video.
Here's some links and datasheets for the multimeter.
Specifications: www.cem-instruments.in/pdf/DT-...
Where to buy: www.reichelt.com/CEM-DT-9989/3...
Datasheet for the Hycon HY3131 multimeter frontend chipset: www.hycontek.com/attachments/D...
Datasheet for the Texas Instruments Microcontroller: www.ti.com/lit/ds/symlink/tm4c...
Enjoy!!

[@camurgo]

That was a great review! I even went and checked your channel to see if you had any more multimeter reviews, sadly you don't.. You could consider doing more multimeter reviews in the future.

[@RWBHere]

You certainly earned that meter! Thanks Jim.

[@Tool-Meister]

I DO like the Auto Hold feature! Very much like the Auto Hold on Fluke meters. Has some limitations, including speed of measurement and a somewhat hidden adjustment of the sensitivity. To measure 0.100 volts and 1.5 volts alternatively using the Auto Hold, the sensitivity must be set to 1%. Then it works just like the Fluke, only slightly slower. A great feature not present on my other deluxe meters including the Uni-T 181A and the Brymen 869s. This is a VERY useful feature when measuring power distribution panels, circuit boards , etc. when you can't look away for fear of shorting something.

[@felixcat4346]

Excellent review, thanks for this.

[@PaulMcElroyWasHere]

There's been a refresh to this device model!

[@PLRtx]

Great video interesting measuring device.

[@endongsiruba2989]

Nice Jim you detailed it well. At first I'm about to like it but I'd rather buy a separate oscilloscope. Thank you

[@MkmeOrg]

Well done Jim! Excellent review. And as a bonus- when you knock it into the water after 36:57 - you have a great "Thug Life" video. Just zoom in on the rabbit and add the sunglasses overlay. Epic :) Cheers Sir

[@ThingsWhichArentWork]

Thanks Eric.... as normal, the pets steal the show once again :-)... Cheers!!

[@drankenkorps]

I was wondering ..what is max voltage AC or DC for osciloskop ? It si not that i need it.. but good to have?

[@DavidLeeMenefee]

Looking at this for awhile, it now kinda makes sense to me that the on/off and the OSC position switch was placed in between the current positions and the voltage positions. Sorta as a safety feature. Thumbs up....PEACE from electronicwizard

[@rogeronslow1498]

I have come to realise that Fluke multimeters although expensive are still my first choice. Their user interface and lack of nonsense features make them my choice.

[@xConundrumx]

This user interface is about exactly the same as that on the 287/289 flukes, other than it's in color. So ya.

[@SirHackaL0t.]

Nice review. I do like these types of displays. Odd issues though.

[@ThingsWhichArentWork]

Thanks Clive. Yes - there's a few oddities with the interface... I used the term 'interface designed by an engineer' in the video for this... It's where an engineer has written code which can access all of the functions of the chipset... but the interface/GUI does not necessarily make any logical sense... It's a shame about the triggering on the scope, but given that the scope version of the multimeter is only an extra £40 more expensive than the non-scope version, I'm prepared to be quite forgiving of it's limited functionality... At £40 it's a lot cheaper than the cheapest 1Mhz handheld scopes on ebay, and it can do 200MSa/S rather than the 10MSa/S that the ebay cheapies can do. Cheers!!

[@frab88]

nice review, thanks

[@MauserM03Blog]

Great review Jim. Thanks. I had the Reichelt page for this meter open about a minute into the video, so the publicity worked. :-) Since publishing, I'm wondering if you've had any luck getting better results with the computer software & link, the Bluetooth app functionality, or the oscilloscope functionality? Thanks, Rick.

[@ThingsWhichArentWork]

Hi Rick - Sorry - I haven't touched the PC link software or the oscilloscope functions a single time since this review. Cheers!!

[@j5892000]

I'm looking for one of these!

[@Admiral134]

Good evening! Very interesting review turned out. Watched to the end. Thank you! Though my native language is not English, a lot was clear. I saw the function in the menu calibration. I do not understand how to calibrate a multimeter? Second question - what kind of multimeter were rather Fluke 85 or CEM DT-9989? I plan to buy a multimeter but don't know which is better Fluke 87V5 or CEM DT-9989? For me, the accuracy of measurements is more important than the color display and oscilloscope. I would be grateful if you share your experience. Thank you! Like!

[@ThingsWhichArentWork]

Hi Admiral134 - If you've got the money, buy the Fluke meter every time - You can't go wrong with a Fluke 87 V5... The CEM multimeter has a fantastic chipset inside it for the basic multimeter functions and will give good accuracy, but the add-ons they've made themselves (the oscilloscope functions, data logging,menu system etc) are not well implemented. If you're prepared to live with the cluttered menus, then the CEM meter isn't a bad choice, but personally I'd choose the Fluke. Hope that helps. Cheers!!

[@Admiral134]

+Jim Conner Hi! Thanks for the detailed response. I watched a lot of videos on multimeters and saw that all bloggers are comparing the new multimeters with the Fluke Apparate. If most compare with this manufacturer, Fluke is apparently a reference to the manufacturer of the multimeters. So I ordered the Fluke 289. I subscribed to Your channel. Good luck!

[@TheDIMONART]

HYCON 3131 and Dream Tech DTM0660- very similar ADC`s, they are very precise (DTM0660 used in Aneng Q1, SZ18, ZOYI ZT-Y, Aneng AN870)

[@firasgh871]

Hi, Is there a comparison video between ut181a & ut171c

[@ivailojechev1458]

You can try the new android cem sw meterbox pro. Looks and work great with this dmm

[@danuber5559]

Hi Jim what tester leads are you using for the review ? I guess my CEM came with std red/black tester leads

[@ThingsWhichArentWork]

Hi Dan - I was just using the leads that came along with the meter. Cheers!!

[@yambo59]

Maybe a little silicone grease on those input seals would smooth out the insertion--?

[@Die-Spezialisten]

i also found the metal part. Seems that it is a cut part of a solded wire. I removed it.The performance is good. Some measurements with a Fluke 289 parallel are excellent.

[@ThingsWhichArentWork]

Hi Raumpatrouille - Interesting that you had the same metal bit inside - CEM definitely need to up their quality control. I think that the chipset they used inside the meter is an excellent chipset for making the measurements... It's just a bit let down by the software that CEM wrote to drive the chipset. Such a shame they didn't open-source it, as I'd have fixed a few bits for myself if they had. Cheers!!

[@sotirisantoniou7835]

Hello.Does it have any voltage protection accidentally measuring 230v in the ohms, ma, etc. range Is the beeper fast enough in the continuity range? How many hours does it last in data recording?I am thinking to get one and asking about these because you have it a long time now and maybe you have tested it more. I have a Fluke 289 and a Fluke 87V. One has data logging but no oscilloscope the other has no data logging and no oscilloscope. Why I want the DT-9989 Because it’s a multimeter, data logger, oscilloscope and Bluetooth. Maybe not as the Flukes but if you out in the field faultfinding these features are sometimes necessary to continue. Thank you.

[@ThingsWhichArentWork]

Hi Sotiris - I didn't test mains across the Ohms range, but I'd expect it to be OK with that... ma range will blow a fuse. Continuity beeper is good. It'll last about 48 hours in data recording because sadly there is no way of disabling the display to make it run longer, nor to charge it whilst it's logging because the charging is done through the front terminals so you can't charge and have test leads attached at the same time. The oscilloscope function is almost totally useless, and I would not recommend that you get this meter based on it's oscilloscope function at all. The DT-9979 has the same features as the DT-9989, but without the oscilloscope. Having reviewed the DT-9989 and found out just how bad the oscilloscope is, I've been telling people that the DT-9979 is a better choice... You don't have to spend the extra money on the totally useless oscilloscope function. I guess that if you're out in the feild doing fault finding, then the oscilloscpe might just about be good enough to show you that a waveform is present, but personally I'd be more inclined to take a second dedicated handheld scope with me instead. Take a look at the DSO112A (Marco Reps did a review of it here on youtube recently). Hope that helps. Cheers!!

[@musicrepairserviceswales3836]

Hi Jim, Love Your Isolation transformer and Variac! May I ask where you sourced those please ?

[@ThingsWhichArentWork]

Hello. Both of them are earlier projects that I put together. The isolation transformer itself came from farnell.co.uk and then I 3d-printed an enclosure for it... See this vid... kzbin.info/www/bejne/pGSpioyBZZWnapI ... The variac was an ebay cheapie that was a bit poor to begin with, so I 3d-printed a new front panel for it... See this vid... kzbin.info/www/bejne/rYnYm2h_qL6ejqs ... Hope you enjoy. Cheers!!

[@pengawaspenyerumalutaubat8365]

@@ThingsWhichArentWork Hai friend CEM DT-8908D ?

[@ArkadiAbramovic]

Hello Jim and thank you for the video!!! Can you tell me the maximun value of capacity in can mesure and battery durability on one charge?

[@ThingsWhichArentWork]

Hi Mourinov - Max voltage is 1000V, and battery life when left switched on seems to be around 28 hours... Unfortunately there is no screen saver or way to turn the backlight off when doing data logging... nor is there any way to recharge the meter whilst it's in use, so 28 hours is the max it'll log anything for. Hope that helps. Cheers!!

[@ArkadiAbramovic]

Thank you for the information Jim!!!Nontheless i think this dmm looks very very sexy hahahaha!!!

[@powerbatterychannel4315]

What about FFT in its oscilloscope? According to the pictures on the web, it should have this function. Have you found it?

[@victornichita7591]

s18.postimg.org/n1nsbvzd5/CEM_DT-9989_FFT_008.jpg s18.postimg.org/4m3behsyh/CEM_DT-9989_FFT_010.jpg s18.postimg.org/otgr6tlax/CEM_DT-9989_FFT_011.jpg s18.postimg.org/otgr6vqgp/CEM_DT-9989_FFT_013.jpg s18.postimg.org/u4vnrlzop/CEM_DT-9989_FFT_025.jpg s18.postimg.org/nr6koda89/CEM_DT-9989_FFT_035.jpg s18.postimg.org/9kqtt69nt/CEM_DT-9989_FFT_036.jpg s18.postimg.org/jut8sgwzd/CEM_DT-9989_FFT_041.jpg

[@powerbatterychannel4315]

Oh, it's great! Nevertheless, the device is terribly expensive. Thanks a lot!

[@mc_cpu]

What's the battery life like and what is the charge voltage/current please?

[@ThingsWhichArentWork]

Hi mc349iii - I can't say for sure what the battery life is, but it seems pretty good. I had the meter switched on for around 12 hours during filming and it only went down by 1/3 on the battery meter. I don't know if it was totally fully charged when I got it (the battery meter said it was 3/3... but it said that for the next 8-10 hours too until it finally dropped to 2/3 lights).. The charger is a 10v, 1A unit, so given that the battery is 7.2v, 2.4Ah I'd expect around 3 hours for a full charge from empty. As I recharged the battery back to full last night, I'll set the meter logging temperature every 10 mins today and see how long it lasts... I'll try to remember to come back and update you with the result. Hope that helps. Cheers!!

[@ThingsWhichArentWork]

Hi again mc349iii - The results of my battery life experiment are now in. The battery indicator dropped down from 3 bars to 2 bars after 7 hours.... and 21 hours after power-on, it was still on 2 bars, but then I had to go to work... When I came back from work, it had run out of battery, and it had failed to log any data to memory (because I wasn't around to hit the 'save' button before the battery ran out)... It would seem that the battery life is somewhere between 21 and 29 hours with the screen on, logging a reading every 30 mins... I'm afraid I can't be more accurate than that in the timing. Hope that helps. Cheers!!

[@alitatli3719]

CEM DT-9979 VS Unit UT-181A ?

[@jstro-hobbytech]

What kind of isolation transformer do you use. I've been searching for a decent one just for hobbyist experiments and audio repair.

[@ThingsWhichArentWork]

Hi Joey - I also struggled to find a decent one for hobby use, so in the end I bought a Schneider 1000VA transformer ( www.se.com/uk/en/product/ABL6TS100U/voltage-transformer---230..400-v---1-x-230-v---1000-va ) and then 3d-printed an enclosure for it ( kzbin.info/www/bejne/pGSpioyBZZWnapI ). I've been hunting through my inbox to try and find where I ordered the transformer from, but I can't find the order-confirmation email anymore (it was 5 years ago when I bought it). Hope that helps. Cheers!!

[@jstro-hobbytech]

@@ThingsWhichArentWork cool, thanks!

[@electrodacus]

Good review. That seems like an LCD display not sure why you mentioned OLED a few times. The multimeter part seems good but the Oscilloscope seems to be useless because of that limited firmware.

[@ThingsWhichArentWork]

Hi Dacian - I think you pretty much summed it up perfectly there... All the multimeter functionality (provided by the Hycon chip) is great, but the rest of the features are nothing amazing. The confusion with the OLED/LCD thing is because it was the Agilent 1253 OLED meter that I've been looking lovingly at since I saw it reviewed on eevblog around six years ago.... Mostly I just wanted something with a nicer display then than my Fluke and Metex meters. How're things going with your BMSes? Cheers!!

[@electrodacus]

Jim Conner Yes I remember that Agilent with an yellow or orange OELD on EEVBlog and it looked quite nice especially that it was different at that time. Currently I work on the new project Digital MPPT thermal controller but I will also have some new SBMS versions and a Kickstarter for all this before the end of the year.

[@ThingsWhichArentWork]

Hi Dacian... Digital MPPT thermal controller.... That sounds interesting... Would you explain to me where the 'thermal' part comes in? Are you now temperature regulating the solar panels too to get peak efficiency? Cheers!!

[@electrodacus]

Jim Conner I want to heat my house fully with energy from solar PV panels so the Digital MPPT thermal controller will take a large array up to 15kW (I only need about 9kW for my small house). The idea is to store the energy in thermal mass that is a few order of magnitude lower than to store in an electrochemical battery. So there will be a large PV array and the load will be just simple copper wire that will act as a heat element but in order to maintain max power point the Load needs to be variable. This is where the Digital MPPT thermal controller part gets involved. There will be 6 different size heating wires say 1,2,4,8,16,32 ohm (just an example) and with this you can have a load with a variation in 64 steps and the Digital MPPT thermal controller will select the appropriate load value in order to get as close as possible to the max power point. The other part of the Digital MPPT Thermal controller will have an output for the SBMS and they will also communicate with each other and some of the large PV array will be redirected to battery charging (PV array will also be split in 6 not equally sized sub arrays) and this way battery can be charged in almost any condition with the oversized PV heating array. Sorry if this is not making much sense I will have a video soon explaining much better all this. The idea of the Digital MPPT thermal controller is that it will redirect some of the large array to LiFePO4 battery charging and all of the remaining energy will be stored in thermal mass as temperature differential. In my case the 14 cubic meter concrete slab will be used as thermal mass storage and can store 100kWh with a temp delta of 12C (18 to 30C are acceptable floor temperature). Is possible to also use water as thermal mass storage medium and that can store 1.16Wh per liter per degree Celsius so a 200 liter barrel of water heated from 20C to 60C can store 200liter x 40C delta x 1.16Wh = 9.28kWh of energy and you can imagine how much less expensive that is compared to a battery of same capacity.

[@ThingsWhichArentWork]

Thanks for the explanation Dacian - I remember about your plans for PV heating... we had a little chat about that a few months ago. I've always liked the idea of thermal mass energy storage, but most of the ones I've seen in the past have had far too little mass to provide any significant contribution to heating a building later on... Your 14 cubic metres of concrete however might be enough, as I know you super-insulated your house when you built it.... Your next video is something I'm now very much looking forward to. Cheers!!

[@luispietrzak4675]

thanks ...

[@DoRC]

cool but for the price I'd much rather buy a ds1054z and have money left over for a decent little fluke meter.

[@ThingsWhichArentWork]

Yeah... totally agree... the ds1054z is a much better purchase.... although this might just win out for travelling automotive engineers who need something that runs from batteries and works in the rain (and don't really need an oscilloscope to do much more than show that there's some kind of signal present). Cheers!!

[@sreerajcochin5050]

I had purchased dt 9989 . Very worst customer service support in India . I had send for warranty service now one year over still they didnot returned it to me ,still doing follow up with customer care ......

[@PhilXavierSierraJones]

Do they have cheaper ones, preferably without BT and OSC? I like the style of this multimeter and since I broke multiple multimeters in the past (one was Fluke) I have to buy a good one this time - because delivery here is kinda slow and resellers rip me off - so I can work on my project as fast and efficient as possible. Fluke branded ones are crazy expensive here (160% price of U.S.) so... p.s. Here's a thing: so I got to make a spotlight, which is wireless, that automatically turns on and off based on brightness of the room. The battery I will use will be the power bank thingy, and I am planning to make Arduino or similar to communicate to the PB so it shuts off when light is turned on, not just disconnecting. (Xiaomi power banks keep turning on if there's a load and they're quite expensive so I can't use it) Is there any way to either force the power bank to cycle on and off every few seconds or tap power from the battery itself? It needs to run quite long before the battery runs out (~6hr continuous load)

[@ThingsWhichArentWork]

Hi Xavier - I think there's a BT-989 model which looks to be very similar except for not having the oscilloscope built in - I couldn't find a price for that one, or anyone with any stock... Onto your spotlight/powerbank issue... I'm not sure quite exactly what you're after, but you might be better off looking at creating your own powerbank using something like this... www.icstation.com/step-module-boost-converter-lithium-battery-charging-protection-charger-p-9080.html... It takes hardly any power to hold the output at 5V if there's nothing taking a load (lots of power banks do this), so you could just use a FET to turn on/off your lighting and not worry about what the powerbank circuit is doing, Hope that helps. Cheers!!

[@PhilXavierSierraJones]

Thanks a bunch!

[@ThingsWhichArentWork]

I just stumbled across the DT-9987 which seems to be an even closer match to the 9989 (only without the oscilloscope)... It seems to be around £40 / €50 cheaper than the 9989....I think that for only £40 extra, the oscilloscope is pretty reasonably priced, even given it's very limited functionality. It's cheaper than the cheapest pocket-scope on ebay. Cheers!!

[@PhilXavierSierraJones]

Oh my goodness, you are awesome! Thanks a lot for the help, I appreciate that :)

[@martinb.770]

Took me a while to get, that the Peaktech 3440 is based on the CEM 998_7, missing the OSC-functionality. The price for this on is (currently) far too high and there is barely some device, really filling this niche. The Hantek 2Dxx-Series is not too bad as a basic oscilloscope+signal generator, but as a DMM it is a joke, even compared to cheap ones, let alone, when looking at the features of the Peaktech 3440/CEM 998x/UNI-T 181 trio. (I hope, Hantek adds more DMM evaluation and graphic display options via firmware update, soon, + better software or support for sigrok) So, I am still searching for a DMM featuring logging, (fast) RS232 or USB for remote logging (BT is nice, but unreliable, choky and limited) and practical, capable graphic features, but none convinces me, to complement/fill this gap in my toolbox and replace my antique Metex, which still makes the most fun using it.

[@bigdog8882]

Very Nice. Damn Good video Bro. You sold me. lol

[@andreyvasiliev614]

Hi Jim :) What can you say about CEM DT-9927T or maybe something else? I can't find much reviews about this company at all :( I am beginner. I need normal multimeter for rc/arduino hobby :) Thanks! p.s. good video ;)

[@ThingsWhichArentWork]

Hi Imya - I'm afraid I really don't know anything about the DT-9972T - This is the only CEM multimeter I've ever looked at. If you're looking at a multimeter for RC/ardunio hobbies, then really and truly, absolutely any digital multimeter will be absolutely fine for you to use. The improved construction and safety features on high-end multimeters is important if you're working with mains voltages where you've got an entire power station trying to force electrons through the wires to fry you and you need a device which can protect you when things go wrong. For hobby electronics at low DC voltages, these protections are not giving you any advantages over a cheap multimeter. I've never yet seen a digital multimeter which did not meet it's advertised accuracy, so I'd advise you to save your money and get something reasonably low-priced until you find that you want to work with more dangerous voltages. Hope that helps. Cheers!!

[@andreyvasiliev614]

Jim Conner Thank Jim ;) yesterday I ordered cem dt-9929 for 100$. I think it will be good multimeter :) Thanks again :)

[@SirHackaL0t.]

You hinted they have stuff that rs and farnell doesn't. What sort of things?

[@ThingsWhichArentWork]

Hi Clive - The particular things I was thinking when I said that was that Reichelt sell multimeters from PeakTech and CEM, and I couldn't see those brands on the RS/Farnell sites... Reichelt sell such a wide variety of stuff that I was having a hard time choosing something to review... I spent about six hours browsing their site before I settled on the multimeter. I've asked for a paper catalog so I can flick through the pages to get an idea of their full product range. Cheers!!

[@tomcardale5596]

CPC and Farnell rebrand a lot of the CEM meters as Tenma. cpc.farnell.com/tenma/ten01063/multimeter-waterproof/dp/IN05472

[@NoferTrunions]

Great review! Disappointing findings. I'm in the market for a graphing multimeter where I can export to Excel spreadsheet. While PC interface is good, BT w/smart phone has a lot of logic to it. However it totally failed on any kind of connectivity. I actually was unaware it actually had o'scope capability. Finally. Someone put everything in my hand (!) NOT unfortunately. Would have liked to see the FFT function demoed. OPINION: Internal data logging multimeters w/BlueTooth are becoming the "standard" these days, but I'm waiting for graphing (trending) displays to really show up. This will further blur the difference between a multimeter and a genuine scopemeter. What is crazy is that scopemeters are expensive and yet DO NOT have all the multimeter inputs and long term data logging. Why Not? All that could be added to any scope meter for what, $50 retail? There is no reason why there aren't scopemeters that will simply do everything. Oh, and I mean at a

[@ThingsWhichArentWork]

Thanks Nofer - Yes - this CEM meter was a bit disappointing. It's got a great chipside inside it for the basic multimeter functionality, but the addons that CEM implemented themselves are not as good as they should be. I wish they'd open-source the firmware so that I could fix their broken and confusing menu system for myself. Cheers!!

[@thomasleerriem6872]

It still costs 400 euros when buying it from Reichelt. That's almost as much as the really stunning Fluke 28II I bought from Reichelt lately (500 euros). A Fluke 28II is basically a rugged Fluke 87 V, still the benchmark for professionals. So why pay nearly as much for a meter that sure has a lot of marketing wanks, but doesn't come, from a quality point of view, even close to a Fluke, a Keysight or a Gossen MetraWatt?

[@mafaldawu435]

Hello Thomas. Buying from Reichelt is much expensive. If you still interesting about CEM DMM, why not consider buying from CEM directly? We offer competitve price. BTW, I working in CEM, I can recommend you several new published DMM. Skype:18318180469

[@HawkFest]

Very good review, thank you. The hard box is a nice touch, not many manufacturers offer a hard box in order to keep their DMM secure. I'm skeptical though: are you sure it's a German company lol... I'm asking because at Amazon Canada for instance, we can see its description.. Written In Chinese! 😅 Ok, it's not German. Can we order to Canada from UK's Reichelt, instead of buying through our idiotic Amazon?

[@OrbiterElectronics]

Nice review & meter there Jim, apart from the slightly annoying points you mentioned which you'd have thought R&D would have ironed out first. Oh and BTW.. I can vouch for Reichelt. I've used them quite a few times now and found them to be very good indeed. At least as good as Farnell etc, but with longer delivery times as everything is shipped from Germany AFAIK.. Cheers Jim John

[@ThingsWhichArentWork]

Thanks John. Good to hear that you've had good experiences with Reichelt in the past... hopefully now that they've decided to come and do business in the UK they'll start holding some stock over here too. Cheers!!

[@therealb888]

In India even if ur a big (high view & ssubscriber count) reviewer, u don't get free stuff coz there's so many people. Anyway nice video.

[@tapojyotiacharya]

Nope, a few reviewers get free samples for reviewing...

bu skoskop dan aldim bu cihazi tek gecerim tek eksi yönü komütatör deyide dokunmatik olmamasi. komütatör artik kaldirilmali alt bakir yuzey zamanla is gormez hale geliyor sonra cihaz çöp oluyor dokunmatik olmasi lazim ac dc ohm bazzr osc diyot her bölümü dokunmatik olmali .

[@keithdefazio9613]

Sadly no longer in stock

[@keyplayr61greenhousehydrop14]

Nice multimeter, Jim! Beat the heck out of my Klein ; )

[@ThingsWhichArentWork]

Thanks Keith - I'm very happy with my new toy.... but Klein multimeters are pretty good too. Cheers!!

[@oetken007]

What I don't like about this kind of multimeters is, you have all this stuff to carry around. One adaptor for this, one adaptor for this one for charging.... Besides, these carrying cases are nonsense. I never have seen anyone carrying his multimeter in a case like this. The UI has similarity to my Fluke 289, also the button layout.

[@mrissi77]

Yeah... I bought this multimeter about a year ago. And I do wonder, if I would buy it again, especially after watching this review. It does have some nice features, and it seems to be well calibrated and stable device, but: 1) I really HATE the scope. And no, I WOULD NOT PAY ANY EXTRA PENNY for it. I wish it never be there. 2) The speed: fast only in DC, and the bar-graph is somehow useless - the same refresh rate as main display. It is just some "nice looking" feature - nothing more. 3) LO-PASS - not working good - slope is too "flat". 4) some offset in PEAK-DETECTION mode (but not very annoying) 5) NO ENERGY-EFFICENT mode, ie. no backlight OFF button/mode - would be useful in data-logging mode! THAT IS ANNOYING! 6) few "glitches" in software - could be easily corrected, but no support from manufacturer (I DO BELIEVE scope software could be corrected too, but it seems noone is able to do it in China) 7) AUTOHOLD works in manual range only, and It seems it is not mentioned in manual (I do not remember that). What I DO LIKE (really): It can be very easily callibrated (though not by PC-software: there is NO PC CALLIBRATION SOFT), so if someone have acces to high-end meter/calibrator it may be important. By the way: Good (or at least better) working Android software comes from Extech for "their" GX900. And almost forgot: PC software works fine (meter and OSC functionality) but somehow they fucked-up very important functionality: exporting to EXCEL ends with some kind of error. And the file format is a proprietary one - one can't extract any data easily EDIT: Ok, a new version of PC soft found at reichelt website now seems to work, properly exporting data to XLS file format. So, thaks for review, it helped me at least finding a new version of soft. :) Overall: I like this meter, and now have accepted it drawbacks (excluding OSC) but my feeling is that it should be cheaper - I paid 1600 PLN, that is some 380eur in Poland.

[@ThingsWhichArentWork]

Thanks Marcin for sharing your year-long experiences with this meter. It's hard to get a good feeling of the instrument given only a few days to put together a review video, so it's good to hear what you think of it now that you've lived with it for a while. I think this meter has a good chipset inside it, but the user interface is pretty terrible - I wish they'd open-sourced the firmware so that I could fix the mis-spelt menu options and silly default measurement modes for myself - it's such a shame when manufactures let things down with a poor user interface. I'll check out the Extech software and the new PC software from Reichelt's site - thanks for letting me know they exist. Cheers!!

[@mrissi77]

Oh, an open-source firmware from Chinese manufacturer - a dream! Not only in case of CEM. They like to "copy-and-paste" solutions, but not sharing anything! A few words more ab. meter: As I had opened mine (had to repair broken selector knob), i compared mine meter to Yours. There is a difference in wireless serial link module (the BT daughterboard). Mine is BM57SPP05MC2, yours is different - from drivers included in new software package I assume it is some Texas Instruments wireless chip paired with this included BLE "dongle" (my package has no dongle at all - have to use laptop's built-in BT module). And perhaps that is why I'm not able to communicate with meter using new soft - it seems to require new BLE solution (have You installed the dongle drivers? PC recognizes it?), the older soft just requires picking the right serial port. One more question: have you checked the OSC vertical axis calibration? I have found a terrible "bug"(?) in OSC mode: assuming a known signal with known amplitude (be it a sinus or whatever simple waveform) a trace and an indicated Vp-p CHANGES in vertical axis as I'm changing time base range. On some ranges it is correct, but on some it is a way too high (as an example 4V p-p is "seen" as 6.2V p-p). This bug together with terrible triggering makes the scope functionality nothing more than a toy.

[@TheGrantourismo]

You can buy DT-9979, it is Black-and-white version of 9989 without scope.

[@mrissi77]

@@TheGrantourismo I had a 9979 before I bought the 9989. It had even more annoying bugs, for example the UI fields were not properly refreshed after changing some functions or settings. Probably they already fixed some of those bugs- 5 years passed already 😁 Or perhaps they don't...

[@techguy666]

Not impressed with build quality at all. Sorry but waste of the money here. I'd rather buy a fluke MM and a cheap dedicated bench oscilloscope. Thank you for the nice review.

[@therealb888]

WTF @ 1:04?! u make it seem like multimeters are like toothbrushes but then again ur a pro & not damn student like me who uses $2 DMM.

[@MARIOista]

I'd not consider to buy this one due to this review ...It's kinda unfinished product . Thanks for this review anyway .

[@ThingsWhichArentWork]

Hi MARIOista - Very glad that my review helped you decide. I wouldn't recommend this meter myself either. The cheaper version of this meter without the oscilloscope function (DT9939) would be a better choice, but even still the menu functionality could do with some improvements. Cheers!!

[@barryorbik215]

I was just starting to look at the cem range of multimeters which led me to this utube vid, the first red alert 🚨 was that little gold round sticker on the back that says qc passed, you see it all the time on cheap Chinese tat thats doomed to fail, then he opens it up and a large chunk of solder falls out 🤣 good bye cem I'll give it a miss

[@54CHARM]

Reichelt has increased the price of this DMM by 14% yesterday in The Netherlands and Germany and maybe other countries too . That really sucks. I had one in my basket for payment when I noticed the new price. I've cancelled the order because i don't like these kind of tricks. Thumbs down for Reichelt! Furthermore what worries me a bit are the issues you reported as this meter has been on the market for many years. I've seen reports dated 2011 on eevblog. One shouldn't expect these issues in a DMM that age.

[@ThingsWhichArentWork]

Hi 54Charm - Yes.. I see they've added another ~£45 to the UK price, which means that it's a lot closer to the price of an Agilent. If I'd have had it in my shopping basket, I'd have cancelled my order too. Cheers!!

[@54CHARM]

Hi Jim, just to let you know that I've filed a complaint at Reichelt's a week ago and they never replied (besides an automated confirmation).Therefore I forgot about the CEM and bought me a genuine Fluke 87V instead at a price of €460.95 which is really a bargain here in Europe. Check www.sossolutions.nl. Cheers, Egbert from The Netherlands.

[@alexrill74]

Afther a year and a half of light use my dt9989 doesn't pass it's anual calibration. For current and voltage mesurments. Don't mess around..... Buy fluke

[@mysteryMachinePL]

Its a lot of quality problems for 600 usd multimeter.

[@scottcarlon6318]

mysteryMachinePL opprrator error......

[@willyrivero470]

No match for my ten year old 189 Fluke multimeter. It's more robust and high quality probes. I just wished my Fluke had a sharper display, that's all.

[@DungNguyen-rs9sl]

Combiens coute sa

[@OTOMyNG.ELECTRONICA]

HI.. AGILENT OLED MULTÍMETER, IS A BAD TESTER !!!!