Multimeter review / buyers guide: IP67 Major Tech MT1887 / Extech EX530 Multimeter
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- čas přidán 27. 11. 2011
- The MT1887 / DT-9918T multimeter can be purchased here:
astore.amazon.com/m0711-20/det...
I do a review of the "waterproof" Major Tech MT1887 / Extech EX530 digital multimeter . The Major Tech MT1887 / Extech EX530 is a 40000 count multimeter with IP67 dustproof / waterproof rating.
A list of my multimeters can be purchased here:
astore.amazon.com/m0711-20?_en...
Features:
* Measures True RMS , AC Voltage and Current readings
* IP67 Dust & Waterproof with O-Ring sealed casing
* Auto Range with Manual Override
* Measures Frequency on Electronic and Electrical Circuits
* Measures Resistance up to 40MΩ
* 1ms Peak Hold function
* Temperature between 20 °C to 1000 °C
* 4~20mA % Process loop measurements
* Capacitance to 40mF
* Relative Mode
* Data Hold Function
* Min/Max Recordings
* 0.06% Basic accuracy
* Diode Test and Continuity Buzzer
* Auto Power Off
* High resolution 40,000 Count LCD with 41 segment analogue bargraph
* Overmould housing which disperses various shock over more of the case than conventional holsters
* Integrated Test Lead Holder
* Blue backlight for dimly lit areas
* Intrinsically safe version available on request
* NCV detection now available
www.major-tech.com/Website/Pro...
Other equipment used in the review:
Fluke 287 / 289
Thurlby Thandar PL303 precision linear 30V 3A compact variable power supply
ISO TECH IDM207
Brymen TBM867 / BM867
Brymen TBM251 / BM251
Fluke 115 - Věda a technologie
@MetalPhreakAU I have just done the same on the MT1887 in MIN/MAX and it works perfectly. That must be due to the fact of the auto ranging right across the mV and V range....something my Fluke can't do...it also hits OL once readings are out of range.
@mjlorton I also noticed that the Extech models don't seem to come with the plugs (and are still IP67). The manual for my ABW version makes no mention of them being necessary for the IP67 rating. When I opened up mine to check it out, it seemed like the input terminals are pretty well sealed as the whole thing is moulded plastic around the metal.
I would post some pictures but youtube doesn't allow any URLs in comments.
I just picked up an EX520 meter and while it doesn't have the same count as the 530 has the one I have appears to not exhibit a few of the problems you've identified. It's an EX520-4 on the PCB. For example the analog meter on the bottom of the screen is not bound to the numerical display and updates quite quickly.
@rapsod1911 Well the case and body are the same as the EXtech so I think it is exactly the same bar some colouring and graphics. I'm sure you're correct on the use of the DMM chip....I have seen quite a few others now with a similar spec in different shells / cases. I do a full review of the Brymen TBM867 so you can check there but the continuity is good...but not quite the same as the fluke.
heh, found your video looking for dismantle info as I blew the 10A fuse on mine and I was stuffed if I could split the case, was not even sure it came apart in the middle of the silicon, managed it thanks to this vid and currently have it wrapped in 10A alfoil :) .. temporary till I get a fuse.
I bought mine at a secondhand shop for $50, it has had a hard life in industry I think (serial in the 10xx range, so not a new one compared to your 11xx) , I had to plastic polish the display just so I could read the icons and cleaned the oil off the case with isopropyl, it was black with oil, maybe a mechanics ?
I noticed you comment on the battery, mine still has the same goldenpower battery in place. Battery icon is still there even with the backlight on, so I am pretty confident these are a pretty darn good battery.
I use mine for very low voltages when my trusty fluke 77 or 12 run out of resolution, I agree with the stupidly slow update.
@electrodacus LOL...I think a store...I might need to recoup some of the cash I've spent!!!
Good valid comments...too long you say...I'll make a note ;-)
Thanks for watching.
@dan20n :-) Thanks, I appreciate that feedback.
Thanks for the review. Confirmed most of what I thought about these CEM meters.
Does the min/max function autorange correctly on your meter? If I let mine settle to 0V on the mV (auto)range, then enter min/max mode, and connect a 9V battery I'm met with a max reading of OL. I have to manually choose the correct range before doing min/max readings unless the meter is already in the right range before entering the max/min mode. If you are just measuring a fluctuating voltage its not a problem.
@MetalPhreakAU Again, excellent pictures. I just had a long chat with the MD of Major Tech and he says it does need to be used with the plugs and supplied leads / probes to meet the IP67 Spec. If I have my facts correct, MT export these to AU under a different brand name as they have a very good relationship with CEM. The meter was specifically designed for the mining industry in South Africa as they required a robust / waterproof meter.
Hello. What can you say about CEM dt-9929? Is it a good multimeter? Because I can't find any info for it :( I am trying to find good multimeter around 100$.
Good video! Thanks
p.s. I think that mt1887 is the same like cem dt-9929 but 9929 more newest.
@collectionforsale Thanks for the feedback and info.
@MetalPhreakAU Great picture, and it does seem to confirm that it is sealed. I have left a message for the MD of Major Tech....so let's see if I get a call back and some info.
@MetalPhreakAU You are spot on, I just had a look at their website now and they certainly are the source. Thanks for that feedback.
I have a multimeter just like this one but it's a digitech/jaycar branded multimeter and I got it for $135aud it looks the same
Digitech Qm1543
Reed instruments r5010 as well. Ul certified
These are all made by CEM in Asia :)
I have identical looking meters that are 6000 count, and are the equivalent of the Extech EX520. They are sold in Australia as Sidchrome / ABW Tools (70940). Mine even has EX520CF written on the PCB :P
@MetalPhreakAU Yes. I also noticed that and I see from a video on youtube "Extech EX530 Heavy Duty MultiMeter Endurance Test" that plugs are not used there. Ok...I have just done a vacuum test (sucked my multimeter!!!) on each input terminal and they seem to be sealed...I'm going to call Major Tech here in South Africa and see if they can shed more light.
Try post the link as follows: worldwideweb(dot)whatever(dot)com
Thanks agan for the great feedback.
Maybe it is not rebranded. Maybe they used same DMM chip as EXTECH. I saw lot of DMM with quasi same spec. but 100% different maker. How fast is continuity test on that Brymen?
They're also sold by Jaycar as Digitech ;)
Looks like identical to Digitech QM-1543 sold in NZ for $199nz by Jaycar( $147us)
+Zaps Zapper They are identical, sold under a different name.
Found more or less the equivalent meter from the OEM (CEM DT-9919) on eBay for under £60 ($100) with a slightly different selector switch - "off" at the far left. I have had this meter rebranded by a different company for about 5 years and it would certainly make a good first meter for the price. I agree with everything Martin said about it, its slowness is annoying, but for a first meter under $100, you can't complain. Its better than spending double on a Fluke 113 for instance which has barely any features, and I think it's probably better than the UNI-T models of a similar price.
www.ebay.co.uk/itm/DT-9919-True-RMS-Multimeter-1000V-10A-IP67-Waterproof-amp-Temp-Measurement-amp-Case-/281390992694?_trksid=p2054897.l4275
Up to 1 meter.
@mjlorton I briefly tested mine a while ago under water. I did have the rubber plugs installed, but I was using standard banana to crocodile clip tests leads which do not seal at all. There was no evidence of water getting in so I would say its fairly safe from accidental immersion. The issue however is the water getting in contact with whatever device/voltage source you are measuring *outside* the meter. In my case a 3V alkaline battery pack is harmless :) More Pics: imgur(dot)com/a/48Kp4
southwire has same meter
Who watches a video for an hour, about a multimeter?
riiiighht? Also, I've owned a Fluke 78 for >20 years and NEVER had to worry about dropping it in water or using it in the rain omg.
That would be ME!
Too much money for a Chinese meter with those quirks. I picked up an Extech ex505 kit, which lacks the useless slow bar graph, a little less spec overall, and half the cost. I can't see paying more than $100 for a Chinese meter.