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Electronics Forum / Basics / March 2007Extech MM560 - Micronta 22-167 Shootout
Got my new Extech MM560 today, pretty cool. Haven't had much opportunity to play with it much yet, but I did a few measurements just to see how the 15 year old Micronta was holding up. On an old 6V battery I use for tinkering I get this. Extech: 5.833V Micronta: 5.98V (2.5% high) Plugged into the wall: Extech: 123.61V Micronta: 124.9V (1% high) Running PIC Current: Extech: 1.387mA Micronta: 1.40mA (<1% high) Sorry, no resistance or really low current measurements yet. I do see that the power company is running the mains at anywhere from 59.9xxHz to 60.0xxHz though constantly sliding around. :-) Concerns: Build quality seems decent enough. The probes are certainly nicer than the Micronta, but we'll have to see how they look after 15 years. ;-) The meter looks good so far, but it is different from what I'm used to. When you first set to a uA or mA mode, there is a residual charge of some sort that counts down for a minute and then settles down to below a count of 8-10 (starts out around 400). Shorting the probes makes no difference, you just have to give it a minute to settle down. Is that normal? Does anyone else think it odd that the battery was already installed? > When you first set to a uA or mA mode, there is a residual charge of some > sort that counts down for a minute and then settles down to below a count of > 8-10 (starts out around 400). Shorting the probes makes no difference, you > just have to give it a minute to settle down. Is that normal? Thermal converter for the True RMS? :-)  SignatureBen Jackson AD7GD <ben@ben.com> http://www.ben.com/ >> When you first set to a uA or mA mode, there is a residual charge of >> some sort that counts down for a minute and then settles down to [quoted text clipped - 3 lines] > > Thermal converter for the True RMS? :-) I called Extech about it, they said they didn't think that the meter should be doing that, especially since shorting the probes makes no difference, but the fuse is fine. I'm taking their advice and contacting Mouser about it to see what they want to do. After another five or ten minutes, the count hovers around 4. It really does act like something is heating up, except that turning it off and right back on starts the process over. Strange how it's completely independant of any measuring you're doing. I guess it's a cap/voltage/charge thing affecting some ADC reference chip or something. I just emailed Mouser's tech suport arena, we'll see what they say. Disappointing to say the least. :-( If everybody wanted to be really gentelmanly now, they could send me a meter with an NIST cert. ;-) > If everybody wanted to be really gentelmanly now, they could send me > a meter with an NIST cert. ;-) Everybody, of course meaning Extech and Mouser. :-) >>>When you first set to a uA or mA mode, there is a residual charge of >>>some sort that counts down for a minute and then settles down to [quoted text clipped - 17 lines] > If everybody wanted to be really gentelmanly now, they could send me a meter > with an NIST cert. ;-) Sorry to hear it - what a PITA. Maybe they each should end you one of each (w/without the NIST) so you can compare and see how they should behave. :-) That's a nice looking meter from the specs - thanks for posting the url in the other thread. It has a very large "drool factor". Somehow I couldn't find that on the spec sheet! :-) Ed >>>> When you first set to a uA or mA mode, there is a residual charge >>>> of some sort that counts down for a minute and then settles down to [quoted text clipped - 19 lines] > > Sorry to hear it - what a PITA. It'll be a hassle sending it back, but oh well. It still seems to work fine outside of that little issue. I'm most surprised that my old meter has held up as well as it has. > Maybe they each should end you one of each (w/without the > NIST) so you can compare and see how they should behave. :-) I figured they could at least send me a certified one so we could all feel good knowing it would be right this time? ;-) > That's a nice looking meter from the specs - thanks for > posting the url in the other thread. It has a very large > "drool factor". Somehow I couldn't find that on the > spec sheet! :-) It's not quite as flashy as a bright yellow Fluke or a firey red Wavetek, but it ain't bad. Decent specs and for the money it seemed the best deal. >>>>> When you first set to a uA or mA mode, there is a residual charge >>>>> of some sort that counts down for a minute and then settles down to [quoted text clipped - 38 lines] >It's not quite as flashy as a bright yellow Fluke or a firey red Wavetek, >but it ain't bad. Decent specs and for the money it seemed the best deal. Should have spent $150 and bought the used HP, which is likely to be an order of magnitude more accurate, and more reliable, and less likely to drift over time. PERFECT for long term home use without the need for a yearly cal session! Bwuahahahahahahaha! > On Wed, 7 Mar 2007 21:35:05 -0600, "Anthony Fremont" >> It's not quite as flashy as a bright yellow Fluke or a firey red >> Wavetek, but it ain't bad. Decent specs and for the money it seemed [quoted text clipped - 8 lines] > > Bwuahahahahahahaha! How many times do we have to go thru this? I need/want a portable meter, not a bench meter. I need/want .01uA resolution, not 1uA resolution. Other than that, I'm sure it's a fine meter. That's why the 3478a is not the only thing made. On Mar 8, 3:48 pm, MassiveProng <MassivePr...@thebarattheendoftheuniverse.org> wrote: > >>>>> When you first set to a uA or mA mode, there is a residual charge > >>>>> of some sort that counts down for a minute and then settles down to [quoted text clipped - 45 lines] > PERFECT for long term home use without the need for a yearly cal > session! You don't get it do you? People buy a hand held meter for many good reasons, a big bench meter is not an option for them. Dave :) >> When you first set to a uA or mA mode, there is a residual charge of some >> sort that counts down for a minute and then settles down to below a count of >> 8-10 (starts out around 400). Shorting the probes makes no difference, you >> just have to give it a minute to settle down. Is that normal? > >Thermal converter for the True RMS? :-) He is probably using the 4 to 20 mA scale which is NOT for current measurement, but for process instrument measurement. It RESTS at 4! & EXPECTS 4 as a baseline Minimum! D'oh! Took me all of 6 seconds looking at the data sheet. >>> When you first set to a uA or mA mode, there is a residual charge >>> of some sort that counts down for a minute and then settles down to [quoted text clipped - 10 lines] > > Took me all of 6 seconds looking at the data sheet. I know how to take current measurements, and I know how to use a meter in general. Reread the post til you understand that the count starts at 400ish (4.xx mA in mA mode, 4.xx uA in uA mode) and drifts down to around 4 (0.04mA or 0.04uA) and that shorting the probes has no effect at all. It has nothing to do with process measurements or current loops either. If you'd have spent another 6 seconds, you would have realized that process current loop measurements are displayed as percentages, not ordinary mA or uA. I talked to Extech about it and they think that it's a defective meter. They said to send it back. On Mar 8, 3:57 pm, MassiveProng <MassivePr...@thebarattheendoftheuniverse.org> wrote: > >> When you first set to a uA or mA mode, there is a residual charge of some > >> sort that counts down for a minute and then settles down to below a count of [quoted text clipped - 9 lines] > > Took me all of 6 seconds looking at the data sheet. No, it's the True RMS converter. Dave :) On Mar 8, 3:57 pm, MassiveProng <MassivePr...@thebarattheendoftheuniverse.org> wrote: > >> When you first set to a uA or mA mode, there is a residual charge of some > >> sort that counts down for a minute and then settles down to below a count of [quoted text clipped - 9 lines] > > Took me all of 6 seconds looking at the data sheet. You don't know your own equipment again! - check your beloved Protek 506, it does a similar thing. Takes almost 30 seconds to settle down to zero on AC current, but it does get to zero, no apparent offset. Dave :) > Got my new Extech MM560 today, pretty cool. Haven't had much opportunity to > play with it much yet, but I did a few measurements just to see how the 15 [quoted text clipped - 23 lines] > 8-10 (starts out around 400). Shorting the probes makes no difference, you > just have to give it a minute to settle down. Is that normal? DC or AC range? The lower DC ranges on higher spec meters often have Gohm input impedance which pick up noise, but goes away instantly when you short the probe. Dave :) >> Got my new Extech MM560 today, pretty cool. Haven't had much >> opportunity to play with it much yet, but I did a few measurements [quoted text clipped - 30 lines] > impedance which pick up noise, but goes away instantly when you short > the probe. Shorting the probes has no effect. :-( Oddly enough, it only does then when you have AC+DC (which was apparently the default) or just AC selected. If you select DC only then it seems fine. OTOH, if you select only AC current, it does the countdown thing, only slightly differently (it takes the same amount of time to get down near zero, it just updates the display several times/second instead of once every couple of seconds). Strange. I wish someone else had one and could tell me there experience. > >> Got my new Extech MM560 today, pretty cool. Haven't had much > >> opportunity to play with it much yet, but I did a few measurements [quoted text clipped - 38 lines] > several times/second instead of once every couple of seconds). Strange. I > wish someone else had one and could tell me there experience. Sorry, thought you were talking about the voltage range :-/ My Fluke 87III does the same thing on the uA and mA AC current range. In the 4.5 digit uA mode it starts out out around 2.8uA and slowly settles down over about 30 seconds to around 0.18uA and won't go lower. In 3.5 digit mode it starts around 3.5uA and drops to around the same 0.1-0.2uA, but it's faster than the 4.5 digit mode. mA range is similar with a residual offset of around 1.8mA Obviously the True RMS converter has some settling time, and a residual offset which you can null out, but it takes time again to settle down to zero after the null. DC is of course fine as there is no True RMS converter to deal with. I don't think there is anything wrong with your meter, it's fairly normal for True RMS meters. Meters without True RMS don't exhibit this problem, they just go to zero straight away and sit there. Dave :) >>>> Got my new Extech MM560 today, pretty cool. Haven't had much >>>> opportunity to play with it much yet, but I did a few measurements [quoted text clipped - 43 lines] > > My Fluke 87III does the same thing on the uA and mA AC current range. Hmm...... > In the 4.5 digit uA mode it starts out out around 2.8uA and slowly > settles down over about 30 seconds to around 0.18uA and won't go [quoted text clipped - 6 lines] > residual offset which you can null out, but it takes time again to > settle down to zero after the null. I wonder why the tech support guy didn't snap to that? I guess he probably figured I had it in straight DC mode. > DC is of course fine as there is no True RMS converter to deal with. > [quoted text clipped - 3 lines] > Meters without True RMS don't exhibit this problem, they just go to > zero straight away and sit there. Ok then, I may keep it for a while and see how it does. It certainly seems accurate. It has a 3yr warranty, and it certainly seems like Extech is willing to stand behind their product. I just did some tests and sure enough in DCV mode if I press SELECT and chose RMS, it does the same kind of thing. It takes almost two minutes to really settle out. I don't think I like that, but it sounds like it is par for the course. Really updates the display slowly doing RMS measurements too (like once every two seconds). I just did a couple of resistance measurements: 1M resistor Extech: 1.0195M Micronta 1.020M (.05% high) 390R Extech: 394.44R Micronta: .395K (.14% high) I don't know, but I think my Micronta is not too shabby. > >>>> Got my new Extech MM560 today, pretty cool. Haven't had much > >>>> opportunity to play with it much yet, but I did a few measurements [quoted text clipped - 59 lines] > I wonder why the tech support guy didn't snap to that? I guess he probably > figured I had it in straight DC mode. Yeah, or they might simply follow the "customer is always right" policy, and just wanted to keep you happy. > > DC is of course fine as there is no True RMS converter to deal with. > [quoted text clipped - 11 lines] > like that, but it sounds like it is par for the course. Really updates the > display slowly doing RMS measurements too (like once every two seconds). I'm not really a huge fan of True RMS meters, they are slow and generally not as accurate as normal meters. If you *know* you have a sinusoidal signal then a normal meter is better. Switchable true RMS would be nice! > I just did a couple of resistance measurements: > [quoted text clipped - 7 lines] > > I don't know, but I think my Micronta is not too shabby. It's not, it's a perfectly fine meter for general use. Dave :) >> I wonder why the tech support guy didn't snap to that? I guess he >> probably figured I had it in straight DC mode. > > Yeah, or they might simply follow the "customer is always right" > policy, and just wanted to keep you happy. They certainly didn't make me unhappy by that. Now Mouser on the other hand........... e-mail to tech support at 11:00am yesterday, not a peep. I guess they aren't much on e-mail. I'm going to go ahead and keep it for now, at least until I have reason to suspect that something really is wrong with it. >>> DC is of course fine as there is no True RMS converter to deal with. >> [quoted text clipped - 17 lines] > sinusoidal signal then a normal meter is better. > Switchable true RMS would be nice! Sure does give really slow updates (seconds between each one). I'm glad I don't have to use it unless I need it. >> I just did a couple of resistance measurements: >> [quoted text clipped - 9 lines] > > It's not, it's a perfectly fine meter for general use. I looked around some of the cal sites and in some places it's one of the very few radio shack models they will even look at. This seems to be an almost exact copy of it: http://www.tequipment.net/EZDigitalKD3220.asp. The pc board has KD-3200C stamped on it. Awful cheap now compared to when I bought mine. I sure wish my scope would hurry up and get here. :-) > >> I wonder why the tech support guy didn't snap to that? I guess he > >> probably figured I had it in straight DC mode. [quoted text clipped - 51 lines] > almost exact copy of it:http://www.tequipment.net/EZDigitalKD3220.asp. The pc board has KD-3200C > stamped on it. Awful cheap now compared to when I bought mine. I like that it uses the same jack for V/ohms and uA/mA, no lead swapping. What's the build quality of the Extech like inside? Photos? > I sure wish my scope would hurry up and get here. :-) Was that the 1000 series Rigol ? Dave :) >> I looked around some of the cal sites and in some places it's one of >> the [quoted text clipped - 7 lines] > I like that it uses the same jack for V/ohms and uA/mA, no lead > swapping. Right, just fuses. ;-) > What's the build quality of the Extech like inside? > Photos? I haven't opened it up yet, since it had the batter installed already. I'll try to do it before the weekend is out. Exterior is good, the backlight is pretty bad. Not sure what they were thinking on that, maybe it's a power consumption thing. Instead of being edge lit, it seems to have four leds behind the panel. Maybe it's an illusion. >> I sure wish my scope would hurry up and get here. :-) > > Was that the 1000 series Rigol ? Yup, that would be it. The DS-1102C. I passed on the logic analyzer function, but it seemed to be a decent one. I'm going to wait for an external LA that decodes protocols. What do you think of this for a beater? Nice big 8" screen with full VGA 640x480: http://www.saelig.com/miva/merchant.mvc?Screen=PROD&Product_Code=PSSA002&Categor y_Code= It seriously looks like allot of these scopes share allot of the same hardware technology internally, regardless of the name. Even the software looks and functions in suspiciously similar ways between brands. These scopes are made by Owon: http://www.owon.com.cn/eng/index.asp Too much engrish in the manual though, and ugly overcompressed diagrams and images. Too bad, cuz with a full VGA display, it'd pretty much have to look nice and sharp. They shouldn't have chinced like that on their manual. The battery option is only like $75US. >>>I wonder why the tech support guy didn't snap to that? I guess he >>>probably figured I had it in straight DC mode. [quoted text clipped - 54 lines] > > I sure wish my scope would hurry up and get here. :-) Mouser has an 800 number and they have always been courteous and helpful. And it did not seem to make a difference whether i wanted to return *one* item or order 70,000. > Mouser has an 800 number and they have always been courteous and > helpful. And it did not seem to make a difference whether i wanted > to return *one* item or order 70,000. I'm sure that's true, I've bought stuff from them for over ten years. I'll let them slide this time on it. ;-) >>> Got my new Extech MM560 today, pretty cool. Haven't had much >>> opportunity to play with it much yet, but I did a few measurements [quoted text clipped - 38 lines] >several times/second instead of once every couple of seconds). Strange. I >wish someone else had one and could tell me there experience. On a uA scale on AC, it could easily be induced into it from local sources. See if it does it without the leads attached. If not, try it with the leads twisted. Maybe you have a little electric eel in you. On Mar 9, 9:58 am, MassiveProng <MassivePr...@thebarattheendoftheuniverse.org> wrote: > >>> Got my new Extech MM560 today, pretty cool. Haven't had much > >>> opportunity to play with it much yet, but I did a few measurements [quoted text clipped - 46 lines] > > Maybe you have a little electric eel in you. Then you must have one too. Your beloved Protec 506 does a similar thing without the leads, uA and mA scale. It's the RMS converter settling. Dave :) >On Mar 9, 9:58 am, MassiveProng ><MassivePr...@thebarattheendoftheuniverse.org> wrote: [quoted text clipped - 54 lines] >mA scale. >It's the RMS converter settling. Some meters beep alarm when in current mode without leads. > On 8 Mar 2007 16:05:55 -0800, "David L. Jones" <altzone@gmail.com> >> Then you must have one too. >> Your beloved Protec 506 does a similar thing without the leads, uA >> and mA scale. >> It's the RMS converter settling. > > Some meters beep alarm when in current mode without leads. This one gets all upset if you have the red lead in a current measurement hole, but turn the dial to voltage or resistance settings. It doesn't seem to care about the other way. I guess it's protected and it figures that the user will figure out why they aren't getting a reading. > On Thu, 8 Mar 2007 04:20:31 -0600, "Anthony Fremont" >> Shorting the probes has no effect. :-( Oddly enough, it only does >> then when you have AC+DC (which was apparently the default) or just [quoted text clipped - 10 lines] > See if it does it without the leads attached. If not, try it with > the leads twisted. It does it with no leads. Any time it is first placed in one of the AC or RMS modes, it does this. What seems so strange is that switching from mA to uA doesn't change what you see in the display, it just keeps doing it's thang counting downwards. The general consensus is that the true RMS converter is to blame here and that this is normal behavior. David says his Fluke takes about 30 seconds to settle down. This one will keep going for about two minutes before it really gets "stable", but after the first 30 seconds or so it's within about 20 counts of its resting point. The meter seems to work fine, at least it's in agreement with my micronta. ;-) > Maybe you have a little electric eel in you. >It does it with no leads. Any time it is first placed in one of the AC or >RMS modes, it does this. Another poster's claim about the RMS circuitry seems true then. I don't think it is a heating then as he said though. It is simply a settling resolve at that delicate scale. Evidenced also by the fact that it repeats even with great immediacy of a power/setting cycle. Greater scales likely do it as well, only in mere milliseconds. > What seems so strange is that switching from mA to >uA doesn't change what you see in the display, it just keeps doing it's >thang counting downwards. The general consensus is that the true RMS >converter is to blame here and that this is normal behavior. David says his >Fluke takes about 30 seconds to settle down. Does it do so WHILE actually attempting to take a reading? As in, if you look at some known current level right after a switch to that scale... It will either float down, or read the known value. It might just not like resolving the RMS value for ZERO. :-] >> What seems so strange is that switching from mA to >> uA doesn't change what you see in the display, it just keeps doing [quoted text clipped - 6 lines] > you look at some known current level right after a switch to that > scale... At least when the current that you measure is larger than the count, it doesn't seem to be affecting anything. IOW, you won't see 1.50mA ticking downward continuously. > It will either float down, or read the known value. It might just > not like resolving the RMS value for ZERO. :-] It seems to act like it's following a charge or discharge curve. It counts way fast at first and then keeps slowing down. I never really need RMS values anyhow, so I can just turn it off. What does your Protek do when you first put it in an RMS mode? Does it need a little settling time? > >> What seems so strange is that switching from mA to > >> uA doesn't change what you see in the display, it just keeps doing [quoted text clipped - 18 lines] > values anyhow, so I can just turn it off. What does your Protek do when you > first put it in an RMS mode? Does it need a little settling time? As I mentioned in another post, the Protek 506 does the same thing, takes about 30 seconds to settle down to zero, it does not have an offset though. Your Extech has switchable True RMS mode? If so that would be the first meter I've seen with such a nice function! Dave :) >As I mentioned in another post, the Protek 506 does the same thing, >takes about 30 seconds to settle down to zero, it does not have an >offset though. > >Your Extech has switchable True RMS mode? If so that would be the >first meter I've seen with such a nice function! Yeah, he threw me with that one as mine is in that mode all the time. Suck a.s meter though, by any desirable spec seekers. >> It seems to act like it's following a charge or discharge curve. It >> counts way fast at first and then keeps slowing down. I never [quoted text clipped - 10 lines] > > Dave :) > Your Extech has switchable True RMS mode? If so that would be the > first meter I've seen with such a nice function! You can pick DC, AC or Both (I assume that's "both" is true RMS mode). When in "both" mode, the display updates very slowly. The countdown effect occurs even when using just plain old AC mode (current or voltage), but the display updates several times/second instead. The "countdown" procedes at it's own pace no matter what mode you choose. This only happens in AC or "both" modes, not in any strictly DC mode. > > Your Extech has switchable True RMS mode? If so that would be the > > first meter I've seen with such a nice function! [quoted text clipped - 5 lines] > it's own pace no matter what mode you choose. This only happens in AC or > "both" modes, not in any strictly DC mode. In that case then it's always True RMS just like every other meter. Oh well. I presume it's slower in dual display mode because it has to use the same converter to alternate between direct DC measurement, and measurement of the output from the true RMS converter. Dave :) >It seems to act like it's following a charge or discharge curve. It counts >way fast at first and then keeps slowing down. I never really need RMS >values anyhow, so I can just turn it off. What does your Protek do when you >first put it in an RMS mode? Does it need a little settling time? I think it is pretty cheap. Nowhere near as good or advanced as the ex you have. This meter is like six years old. It is also very basic. I said I only use it for easy stuff like automotive. Just looked... It's pretty sad only 4000 count... yes, only 3 zeros! I'm sure that its version of "RMS" is a "close approximation", not anything worth relying on too heavily. It says "True RMS", but back in the seventies, car stereo makers made a lot of false claims too. :-] Bet it would fail on 15th order harmonics. On current, it says it has a 400uA range with 0.1uA resolution. The thing I like is the data link capacity. For a cheap meter, I can pump figures into a spreadsheet without doing double entry. Still some pretty sad figures by today's standards. My OLD HP still hits home runs with some of the best of them though. >> It seems to act like it's following a charge or discharge curve. It >> counts way fast at first and then keeps slowing down. I never [quoted text clipped - 7 lines] > > Just looked... It's pretty sad only 4000 count... yes, only 3 zeros! My micronta is only 3200 counts. Was great back then. > I'm sure that its version of "RMS" is a "close approximation", not > anything worth relying on too heavily. > > It says "True RMS", but back in the seventies, car stereo makers > made a lot of false claims too. :-] Bet it would fail on 15th order > harmonics. And they stopped.....when?? > On current, it says it has a 400uA range with 0.1uA resolution. So far I'm really happy with the low current measurement ability. My micronta would give me .1uA resolution, but it wouldn't lock onto anything that was less than about 1uA. For example, at 600nA, the Micronta would kinda shudder and occasaionally show a reading of .6 or .7, but most of the time it would show -0 or some such. The Extech has no problems. :-) > The thing I like is the data link capacity. For a cheap meter, I can > pump figures into a spreadsheet without doing double entry. Yeah, the extech has a data output, but it costs $70 for the cable and software. It's a purely optical connection so I guess that's good from a safety standpoint. I'm going to try and see if I can decode the data coming out the IR LED in the back......if my scope ever gets here. > Still some pretty sad figures by today's standards. > > My OLD HP still hits home runs with some of the best of them though. The HP has really nice specs and ebay has them at a reasonable price. Tucker wants 750 for a refurb, can you believe that? Dear friend : It is my fortunate writing to you . you will discover this is a wealth accumulation place. The website of our company is http://www.china-powerseller.com We are a big agent for Laptop Mobile Phone\Digital Camera\CDJ\DJM\Apple Ipod\PSP\VEDEO GAMES \Television\GPS\Telescope in CHINA . All of our commodities is the most advanced quality but lowest price. we also have the safest and most convenient transaction way to guarante the transaction arries on normally . looking forward to your coorporation and cause all of us both to profit. you can contact us by Email:china.seller#hotmail.com MSN: china.seller#hotmail.com best wishes! your sincerely http://www.china-powerseller.com MSN/Email: china.seller@hotmail.com www.china-powerseller.com sez: > Dear friend : > It is my fortunate writing to you . you will discover this is a wealth > accumulation place. Is this just a 'bot'? SignatureDaveC me@bogusdomain.net This is an invalid return address Please reply in the news group > www.china-powerseller.com sez: > [quoted text clipped - 3 lines] > > Is this just a 'bot'? Probably. Looks like maybe it is tagging onto threads with more than a certain number of posts. There's probably a method to the madness in there somewhere. You never did say what you thought of the Owon 25MHz-100Msa/s-6K buffer DSO on sale for $329. http://www.saelig.com/miva/merchant.mvc?Screen=PROD&Product_Code=PSSA002&Categor y_Code= > You never did say what you thought of the Owon 25MHz-100Msa/s-6K buffer DSO > on sale for $329. Well, I don't know if I'm qualified. I've not had a lot of experience evaluating scopes. I just usually buy quality used brand names (I own 2 Tektronix scopes). But if I had to buy new and wanted an LCD scope, I might try it. Looking at the specs, I notice it says "Sampling rate: 100 MS/s" then a bit later "Sampling rate range "10 S/s ~ 250 MS/s". Don't know what that means (if it's a range, why say 100MS/s? If its set, why say 10 S/s ~ 250 MS/s?) I would have to ask questions about it. But most of all, I think equipment like this is best tried out. If you know someone who already has a certain model, you can "test drive" it. Or if the seller is willing to offer a decent return policy, that would be another way I'd be tempted. But outright buying it from what I see on the web site? Mmm... I think I'd not do that. But then I'm not looking right now. Hope that's somewhat helpful. Enjoy, SignatureDaveC me@bogusdomain.net This is an invalid return address Please reply in the news group >> You never did say what you thought of the Owon 25MHz-100Msa/s-6K >> buffer DSO on sale for $329. [quoted text clipped - 3 lines] > 2 Tektronix scopes). But if I had to buy new and wanted an LCD scope, > I might try it. I just meant in terms of the pricing. $329 for a color DSO seems an awful good deal. Nice big full VGA screen too. > Looking at the specs, I notice it says "Sampling rate: 100 MS/s" then > a bit later "Sampling rate range "10 S/s ~ 250 MS/s". Don't know what > that means (if it's a range, why say 100MS/s? If its set, why say 10 > S/s ~ 250 MS/s?) I would have to ask questions about it. Hmmm.....I hadn't noticed that. The Rigol changes the sample rate based upon the time base selected and the buffer length (norm 1k/2k or deep 512k/1M). I'm surprised at how useful a seemingly small 2k buffer is. > But most of all, I think equipment like this is best tried out. If > you know someone who already has a certain model, you can "test [quoted text clipped - 5 lines] > > Hope that's somewhat helpful. I was just curious what you thought of the price. > I was just curious what you thought of the price. Less is better! (c: But I have to evaluate the product too. I mean, if it's a pile of rubble, $2 is too much. If it's the functional equivalent of the Tektronix 2465 and more, then $329 is a fabulous price. You get what I mean... SignatureDaveC me@bogusdomain.net This is an invalid return address Please reply in the news group > > I was just curious what you thought of the price. > [quoted text clipped - 7 lines] > This is an invalid return address > Please reply in the news group Any feedback from the OWON ? >>> I was just curious what you thought of the price. >> [quoted text clipped - 9 lines] > > Any feedback from the OWON ? None yet that I've seen. I have the Rigol DS1102C and I'm really happy so far. I'm really impressed with Rigol tech support. I had a couple of questions/issues and they were very responsive via e-mail. Not bad for dealing straight with China IMO. :-) |
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