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RICHMETERS RM406B CHEAP-O Multimeter Review & Teardown! 

Darren Walker
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11 сен 2024

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Комментарии : 94   
@numerical_error
@numerical_error 3 года назад
I might be a year late, but man this is probably my favourite multimeter on the channel so far. And the fact that you can have this functionality and build quality for just $30 in the end of 2020 just amazed me. Would definitely buy this one if needed a replacement. There is a RM406A model that apparently measures temperature and has capacitance range up to 100mF but no "high speed measurement" feature. It would have been a tough choice for me for sure. I don't like to leave empty comments. But I'll feed that annoying RU-vid algorithm in hope it'll promote this channel at least to some degree. It deserves much more than 3.5k subscribers.
@KeepOnTesting
@KeepOnTesting 3 года назад
Definitely 👍 a terrific multimeter and one of my favs on the bench! Its incredibly fast to range as well which is really nice especially when troubleshooting alot of components. Thanks for the kind words...The Channel will only get bigger and better with subscribers like you ! Keep on Testing! 😀👍
@yambo59
@yambo59 5 лет назад
Wow - thank you guys so much, I never win anything - you really made my day wasnt expecting anything like that - thanks so much.
@KeepOnTesting
@KeepOnTesting 5 лет назад
Congrats !! Couldn't happen to a nicer guy!! Enjoy the multimeter!! 😀👍
@yambo59
@yambo59 5 лет назад
Really great to see some of the meter manufacturers giving us even more for our money, starting to see more ten thousand count meters ive noticed - of course the one thing you still wont see for these prices is the input protection of the big boys but these meters arent competing in that group. Many will only use theirs for DIY and home low level-medium input work and used responsibly these are amazingly great value feature rich meters for very little money.
@KeepOnTesting
@KeepOnTesting 5 лет назад
Agreed, lots of meter for little cash. It does alot if not more than meters costing 10x as much. Yes, input protection wise it's no Fluke, but it's also fine for most jobs, if you need to test high mains then you'll probably need to invest a few more $$$. Definitely robust for the DIY or Home Electronics Lab.
@russia.samara
@russia.samara 4 года назад
Please, please help! Disassemble it further, show how the contacts are located on the mode selector!!! They flew, now do not know how to assemble
@KeepOnTesting
@KeepOnTesting 4 года назад
Email me,, netplicity1@gmail.com if you still need help, I'll send you a pic of the selector contacts.
@just_arandom_guy8209
@just_arandom_guy8209 5 лет назад
A great review for a great multimeter!👍
@KeepOnTesting
@KeepOnTesting 5 лет назад
Thx..It was a great DMM to review!
@isrohrohayati8990
@isrohrohayati8990 4 года назад
@@KeepOnTesting This multimeter is similar to Mestek Dm100
@slybunda
@slybunda 4 года назад
is this a rebrand of mestek?
@KeepOnTesting
@KeepOnTesting 4 года назад
No, Richmeters does rebadge some of their instruments but I believe the original oem is Shenzen Zotek Instruments CO., LTD
@isrohrohayati8990
@isrohrohayati8990 4 года назад
you mean similar Mestek Dm100 right?
@KeepOnTesting
@KeepOnTesting 4 года назад
@@isrohrohayati8990 Yes, that's correct.
@Dezmond2inbox
@Dezmond2inbox 4 года назад
@@KeepOnTesting board marked as DM100
@bhushan9066
@bhushan9066 3 года назад
Is the current shunt replacement with a SMD resistor a good idea which is becoming common? What damages or problems can it make if it is unfavorable?
@KeepOnTesting
@KeepOnTesting 3 года назад
Personally, I would rather see a current shunt any day...A current sensing resistor could be used as a cost saving measure or pcb design utilization to save space. The tolerances are usually adequate but temperature coefficients aside I still prefer a big beefy shunt in my multimeters!
@derektodd4126
@derektodd4126 5 лет назад
Hi Darren, good looking unit for the price. Wondering if you can find out what the highest resistance reading is? Best wishes from Northern Ireland.
@KeepOnTesting
@KeepOnTesting 5 лет назад
Hi Derek, Max in Resistance was 99MΩ, just shy of 100...Go figure ;)
@camarine32
@camarine32 2 года назад
Was hoping this tear down will show the rotary switch copper tracks on PCB. I have a Mestek DM100 identical with this one. After approx.14 months of moderate use (few times a week) the multimeter would only display NCV mode no matter the knob position so I concluded the rotary switch developed a serious problem probably from the lots of rotations that have to be done to get to the desired scale. Found the rotary switch tracks on PCB are poorly designed with plated holes right in the middle of the circle shaped contact tracks and so the domes of the contact plates on the knob rub against the plated holes all the time. I love the fast measuring algorithm implemented in this DMM but with a dead one already I will look for other options as its replacement. These days RM406B or DM100 cost around 30 USD on aliexpress still feels expensive if it lasts only a bit over 1 year.
@KeepOnTesting
@KeepOnTesting 2 года назад
Email me : netplicity1@gmail.com I'll send you a pic of the selector tracks. 👍
@3rdpig
@3rdpig 5 лет назад
Thanks for the review. I'd almost be tempted to buy one just for the neat display and VFC function. I can forgive no REL function, but how any modern meter, even a cheapo one, can fail at LED testing and 100M resistance is beyond me. Almost any hobbyist is going to want those functions working properly. I'd be interested in hearing what Richmeters says about it. Also, an awful lot of these meters look a lot alike, could they all be made by one or two companies? Possibly Zotek and Owon?
@KeepOnTesting
@KeepOnTesting 5 лет назад
I agree, I will ask them and post the reply. Richmeters is not an OEM, they do not do any R/D far as I know..but I will have more details to follow... Yes, to bad about those led's..dang, that really upset me. Overall though, its a very nice instrument, well made, does not feel cheap and ohhhhh that gorgeous display!
@3rdpig
@3rdpig 5 лет назад
@@KeepOnTesting The display really is great looking...have you taken one out in the sun and seen if it was visible in direct sunlight? The one reverse LCD I got to look at was unusable in direct sunlight. At least half the home repairs I do are either on the car, the evap cooler, the A/C or one of the outdoor lights. That being said, the cost of these meters is so low that I don't really mind having one for indoors and another for outdoors. But it would be nice to know before buying. Review the clamp meter next, please!
@KeepOnTesting
@KeepOnTesting 5 лет назад
@@3rdpig I will try tomorrow outside..overcast the last few days..I will let you know how the display looks! Clamp just arrived so it will be coming out for the review soon!
@KeepOnTesting
@KeepOnTesting 5 лет назад
@@3rdpigWe finally had a sunny day and the display though dimmed was still good! Definitely useable. The clamp review is coming in the next few days!
@3rdpig
@3rdpig 5 лет назад
@@KeepOnTesting Good to know, thanks.
@xray364
@xray364 4 года назад
Nice multimeter but failed the LED test. Obviously probably because it had only 2 x 1.5V batteries. Can you please explain why the LED test is important. Thanks in advance
@KeepOnTesting
@KeepOnTesting 4 года назад
It's a personal pet peeve for myself, I believe every multimeter should be able to illuminate and display forward bias when testing LEDs. Call it a basic test function that should not be optional as its every basic testing criteria for any dmm.
@peterk9860
@peterk9860 4 года назад
Im in the market to get my self a multimeter, between RICHMETERS RM406B & UNI-T UT89XD which is more recommended? (Maybe do a comparison review of these two?) Need one mostly for automotive and electronic boards testing, or there is better one you can recommend in same price range. Thanks
@KeepOnTesting
@KeepOnTesting 4 года назад
Hi Peter, because you've mentioned Automotive repair, I would choose the UNI-T just because it's better built to withstand the rigours of car repair. Also the Bluedriver Multimeter I reviewed last year is another good choice if you will be doing alot of car work. Good idea about the SHOWDOWN comparison, I will keep that in mind.
@peterk9860
@peterk9860 4 года назад
​@@KeepOnTesting, Thanks for reply an recommendation, probably will go with UNI-T one, also I've checked out the BlueDriver Automotive Multimeter and can't find one selling, where they been listed for sale they are out of stock or unavailable.) Comparison videos are great between similar price range and similarities between units and brands.))
@KeepOnTesting
@KeepOnTesting 4 года назад
@@peterk9860 The UNI-T will serve you well..its a tough meter and a great addition to the bench! Keep On Testing !
@MrGixxer51450
@MrGixxer51450 4 года назад
Does the NCV mode detect wires behind drywall? (Similar to a stud finder for example or some better quality voltage detector pens) And would it be able to follow a wire along the wall???
@KeepOnTesting
@KeepOnTesting 4 года назад
Yes, that's the whole concept behind NCV and the Richmeters has a pretty good implementation of it...👍
@MrGixxer51450
@MrGixxer51450 4 года назад
Darren Walker i know that’s the concept but most reviews i’ve seen of multimeters with NCV are usually almost worthless, most have a hard time reading a powerbar so i was just wondering how this one fairs on a drywall per say. See like this one seems like it actually has good NCV capabilities ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-kxvIAD0zack.html
@KeepOnTesting
@KeepOnTesting 4 года назад
@@MrGixxer51450 The NCV is not very good.. definitely nothing to write home about, it's slow and not very fast.
@stoptellingmewhattowrite
@stoptellingmewhattowrite 4 года назад
Can't find this meter on ebay anymore...any idea what happened to it?
@KeepOnTesting
@KeepOnTesting 3 года назад
Still available but definitely harder to find..
@yi_huimeng1936
@yi_huimeng1936 4 года назад
So good 406B 406B=663 incomparable
@11Modern11
@11Modern11 4 года назад
I have richmeters rm111, should I get this one too? for home purpose.
@KeepOnTesting
@KeepOnTesting 4 года назад
I think it would be a great compliment to your 111. Great big display and lots of ranges.
@bhushan9066
@bhushan9066 3 года назад
What is the humidity sensor called? Where is the temperature sensor onboard for ambient temperature 🌡️?
@KeepOnTesting
@KeepOnTesting 3 года назад
The temp sensor is a small SMD 0603 platinum temperature sensor located on the upper left PCB.
@bhushan9066
@bhushan9066 3 года назад
@@KeepOnTesting WOW! Platinum!
@cherukapathirana9228
@cherukapathirana9228 5 лет назад
Can you please show how to use V. F. C function.
@KeepOnTesting
@KeepOnTesting 5 лет назад
While in AC mode simply press the VFC button to enable VFC. It will automatically filter out any distortion.
@romanh.8978
@romanh.8978 3 года назад
Could you please make test of NCV, that it is capable to find live wires inside of a wall? I have UNI-T UT171B which works amazing even for not loaded wires and I am looking for some cheap alternative for home usage. It is better than any wire detector I have seen.
@KeepOnTesting
@KeepOnTesting 3 года назад
Can you clarify.. NCV function in the multimeter or strictly an NCV detector?
@romanh.8978
@romanh.8978 3 года назад
@@KeepOnTesting I meant NCV in the multimeter. Thank you.
@Sunshine22232
@Sunshine22232 3 года назад
Thank you 🤔🙂👍
@KeepOnTesting
@KeepOnTesting 3 года назад
😀
@qolbunsalim5188
@qolbunsalim5188 5 лет назад
How about the battery consumtion of this "black" lcd RM406B-MTDM100 compare to "normal" lcd on HB-118a?
@KeepOnTesting
@KeepOnTesting 5 лет назад
Good question, I will verify shortly and let you know.
@qolbunsalim5188
@qolbunsalim5188 5 лет назад
Thanks in advance pak Darren.
@KeepOnTesting
@KeepOnTesting 5 лет назад
@@qolbunsalim5188 I'll try to have that for you by Wednesday..
@qolbunsalim5188
@qolbunsalim5188 5 лет назад
No problem Pak Darren. Thankyou. :)
@KeepOnTesting
@KeepOnTesting 5 лет назад
@@qolbunsalim5188 Here you go (Sorry for the delay...) Richmeters RM406B battery usage is a whopping 24mA!! Habotest 1.8mA with No backlight. 16mA with Backlight and 24mA (only for 6 seconds) with the input alerts flashing). Hope that helps!!
@ezrakowadlo
@ezrakowadlo 3 года назад
Can you measure a LED with this meter?
@KeepOnTesting
@KeepOnTesting 3 года назад
Definitely! No worries there. Simply put the Range Selector switch into diode mode and you're all set.
@ezrakowadlo
@ezrakowadlo 3 года назад
@@KeepOnTesting Ok, thanks. I did try but with no result.
@ezrakowadlo
@ezrakowadlo 3 года назад
@@KeepOnTesting Please disregard my last comment. I realise I am referring to a different meter, not this one. My mistake. Apologies.
@KeepOnTesting
@KeepOnTesting 3 года назад
@@ezrakowadlo No worries, which multimeter are you referring to, maybe I can help?
@ezrakowadlo
@ezrakowadlo 3 года назад
@@KeepOnTesting Mestek DM100
@qolbunsalim5188
@qolbunsalim5188 5 лет назад
The dress of my winapex et8102 is borrowed by new Aneng 9999count M20 meter.. hmm😅
@KeepOnTesting
@KeepOnTesting 5 лет назад
So true! Why oh why does Aneng need to look like a WinApex!!!
@yambo59
@yambo59 5 лет назад
I feel like im a victim of temperature discrimination-lol-how can such a nicely equipped meter offer something like relative humidity yet read only in C* and no F*-?!? still watching. And ill say it again - clean those probes first, it almost always helps
@radius.indrawan
@radius.indrawan 5 лет назад
congrats for your new multimeter, yambo59! 😃
@yambo59
@yambo59 5 лет назад
Thank you-! Really caught me off guard I never win anything-lol Darrens a great guy and makes some of the best meter review videos around for us addicted collectors and others as well -- Thanks Darren-!
@sjimosui8279
@sjimosui8279 5 лет назад
Are uni-t ut33d+ damn accurate,😍I wish to buy it.?
@KeepOnTesting
@KeepOnTesting 5 лет назад
Yes the 33D+ is very accurate..
@sjimosui8279
@sjimosui8279 5 лет назад
I really liked your channel and wish you to have 100k subs in near future.thanks👍
@sjimosui8279
@sjimosui8279 5 лет назад
Can you do review of MASTECH MAS830L multimeter.they are easily available in india and I want your opinions about it.
@KeepOnTesting
@KeepOnTesting 5 лет назад
@@sjimosui8279 Definitely, I'll order one for a review..!
@KeepOnTesting
@KeepOnTesting 5 лет назад
@@sjimosui8279 Many Thanks!! 100K would be amazing!
@janebezerra6399
@janebezerra6399 4 года назад
Este mutimetro pareci cer muito bom preciso de um
@user-hs3jt9wi2d
@user-hs3jt9wi2d 4 года назад
هاذا قطعه كم سعرها
@العلمللجميع-ث8ن
@العلمللجميع-ث8ن 2 года назад
😀😀👍👍🥰
@janebezerra6399
@janebezerra6399 4 года назад
Estou precisando de um mutimetro dese estou se dinheiro
@user-hs3jt9wi2d
@user-hs3jt9wi2d 4 года назад
متابع
@leoarcillatechandsoundssys4992
@leoarcillatechandsoundssys4992 3 года назад
Same brand mestek all multimeter same brand
@KeepOnTesting
@KeepOnTesting 3 года назад
ZOTEK is the OEM. Not all multimeters are OEM , some are rebadged ..ZOTEK,UNI-T, All-sun are examples of OEMs
@haajee1
@haajee1 5 лет назад
Please if you want to make a professional youtube video or review stop with add all the Windows Movie Maker in your video´s, ;)
@KeepOnTesting
@KeepOnTesting 5 лет назад
I've never used Windows movie maker . I think Multimeter reviews can be entertaining as well as informative.
@haajee1
@haajee1 5 лет назад
@@KeepOnTesting ofcourse but sometimes less is more. Sorry if I sound a little bit to negative. :)
@KeepOnTesting
@KeepOnTesting 5 лет назад
@@haajee1 Thanks for the feedback, it's appreciated and helps me all the same.
@haajee1
@haajee1 5 лет назад
@@KeepOnTesting Go for it. I didn´t make reviews or something. From the sideline is always easy to commentary. :) Also a lesson for me: if you give feedback do it the positive way. Mostime i do but i think it wasn´t my day... ;) Really interest. You has reviewed a lot of cheap multimeters. What is in your opinion the best multimeter for price and quality. This Richmeter?
@stoptellingmewhattowrite
@stoptellingmewhattowrite 4 года назад
@@KeepOnTesting I tend to find little cheesy sound and video effects kinda amusing, most reviews are dull and boring ... so, I guess it is a matter of opinion.
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