EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: Geoff_S on April 14, 2017, 02:01:51 am
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I think I need to bite the bullet and get a bench meter with at least 5.5 digits. I'm trying to troubleshoot some analog parts of an data acquisition system involving low level signals (~10-20 uV) and my Fluke 87V handheld just can't give me enough precision. I've looked around and come up with a few options:
- 2nd-hand older DMM (eg HP 3478A, about $150-200)
- new, lower-end chinese DMM (eg Rigol DM3058E $500)
- new Keithley 2110 ($650)
- refurb Fluke 8808 ($650)
I'm a bit leery about buying an old unit - not so much about the lack of calibration and absolute accuracy; I just don't want to take the risk that it doesn't work reliably.
On paper the Rigol looks like a pretty even match to the Fluke 8808 and Keithley 2110. I've read many of the threads here on the Rigol and while it doesn't get rave reviews, nor does it get bad reviews. In practical terms is there much to recommend it over the other options ? Any other DMM's in that price range that I could consider ?
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The GW Instek GDM-8251As from the ITT auction on eBay right now (http://m.ebay.com/itm/GW-Instek-120-000-Counts-Dual-Display-http://m.ebay.com/itm/GW-Instek-120-000-Counts-Dual-Display-Multimeter-GDM-8251A-/291980567514?hash=item43fb65e3da%3Ag%3AZK8AAOSwa%7EBYXVg8&_trkparms=pageci%253A8471049a-20b8-11e7-a448-74dbd180e6a0%257Cparentrq%253A6a40549315b0a60ce5b522e1fffe9b42%257Ciid%253A5-GDM-8251A-/291980567514?hash=item43fb65e3da%3Ag%3AZK8AAOSwa%7EBYXVg8&_trkparms=pageci%253A8471049a-20b8-11e7-a448-74dbd180e6a0%257Cparentrq%253A6a40549315b0a60ce5b522e1fffe9b42%257Ciid%253A5) are bargain.
There's been a few threads here about them.
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I'm trying to troubleshoot some analog parts of an data acquisition system involving low level signals (~10-20 uV) and my Fluke 87V handheld just can't give me enough precision.
Carefully read the data sheet of anything you're looking at as that 10-20 uV may be off the bottom of the range. That is, on some 51/2 digit meters the highest resolution is 10 uV. The HP 3478 is 100nV so that'd be fine and I don't know the others you've listed off the top of my head.
With the price ranges you've quoted you could look for a 61/2 digit HP 34401A as well.
I'm a bit leery about buying an old unit - not so much about the lack of calibration and absolute accuracy; I just don't want to take the risk that it doesn't work reliably.
Swings and roundabouts. Some individual older meters will be flaky because of age, some will instead be nicely bedded in and settled with most of the intrinsic long term drift having happened a long time ago.
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The new 6.5 digit SDM3065X will be out next week if you can wait for the reviews.
Otherwise if 5 1/2 digits are enough SDM3055 @ US$ 469 could be a good option for you.
Basic functionality should be the same between these units and I'll be checking them against each other when I have a 3065X in a week or so.
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Thanks for all of the quick replies and helpful suggestions/comments !
The Siglent SDM3065X is probably more than I'd ideally want to spend, but I'll keep it in mind.
I had seen the Instek GDM-8251A's on ebay but the seller doesn't ship internationally :( I have found a few 2nd hand HP's/Flukes though - just trying to make the decision whether to buy new or not...
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There are lots of good answers to this question, and my favorite 5.5 digit DMM probably isn't one of them, but only because you want the smallest range.
The Keithley 197 is only $25-$100 and is 220,000 counts. I think that's considerably better than the GW Instek meter on ebay, but that's also guaranteed to work. But the bottom range is 200 mV with 1uV precision, which probably won't be be the leading meter here.
For the price, though, it's *very* hard to beat. I know Keithley also made nanovoltmeters during this time period, but I think they are still relatively expensive.
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Another used option to consider is the Fluke 8842a. They can be found on eBay for under $200 - sometimes much less - though not all of them have the AC option.
Shipping internationally is sometimes an issue I guess. Bummer. :(
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Another concern is the input impedance of the meter. The GDM-8251A is only 10Mohm. Depending on the circuit being probed, higher input impedance may be needed. The 3478A, 34401A, and Keithley 196, 197 all provide >1Gohm input impedances.
If you buy the 3478A, it needs its input filter capacitors and battery replaced. The 34401A shouldn't need any sort of maintenance.
Addendum: my major deciding factor of new vs. old is if you want USB communications. If not, go for a 6.5 digit used DMM which will get you down to 100 nV resolution. Below that, you'd need to start looking for electrometers.
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Another concern is the input impedance of the meter. The GDM-8251A is 10Mohm, and the Keithley 197 is 1Mohm. Depending on the circuit being probed, higher input impedance may be needed. The 3478A, 34401A, and Keithley 196 all provide >1Gohm input impedances.
If you buy the 3478A, it needs its input filter capacitors and battery replaced. The 34401A shouldn't need any sort of maintenance.
Addendum: my major deciding factor of new vs. old is if you want USB communications. If not, go for a 6.5 digit used DMM which will get you down to 100 nV resolution. Below that, you'd need to start looking for electrometers.
The 197 is 10M, 11M, or >1G Ohm, and is >1G Ohm on the appropriate ranges.
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The 197 is 10M, 11M, or >1G Ohm, and is >1G Ohm on the appropriate ranges.
My mistake. I just edited my earlier post. I was reading the AC volts specification by mistake.
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I'd seriously look at a used 34401A. They are plentiful used, so you can pick the seller, state, age and calibration that fit you requirements. And they are bulletproof and very stable so you generally don't need to worry about being let down.
They also boots with 5.5 digits so you can pretend it's only 5.5 ;)
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I'd seriously look at a used 34401A. They are plentiful used, so you can pick the seller, state, age and calibration that fit you requirements. And they are bulletproof and very stable so you generally don't need to worry about being let down.
They also boots with 5.5 digits so you can pretend it's only 5.5 ;)
If I lived in the States, I'd buy a used 34401A in a heart beat :) The availability of 2nd-hand bench DMM's here in Australia is very, very limited unfortunately. Having said that, I've come across an old 8440 which might be ok.
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I had seen the Instek GDM-8251A's on ebay but the seller doesn't ship internationally :(
I'm sure they do! Last time I looked there are sellers which ship internationally. Otherwise just ask because the other sellers used to offer international shipping.
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The GW Instek GDM-8251As from the ITT auction on eBay right now (http://m.ebay.com/itm/GW-Instek-120-000-Counts-Dual-Display-http://m.ebay.com/itm/GW-Instek-120-000-Counts-Dual-Display-Multimeter-GDM-8251A-/291980567514?hash=item43fb65e3da%3Ag%3AZK8AAOSwa%7EBYXVg8&_trkparms=pageci%253A8471049a-20b8-11e7-a448-74dbd180e6a0%257Cparentrq%253A6a40549315b0a60ce5b522e1fffe9b42%257Ciid%253A5-GDM-8251A-/291980567514?hash=item43fb65e3da%3Ag%3AZK8AAOSwa%7EBYXVg8&_trkparms=pageci%253A8471049a-20b8-11e7-a448-74dbd180e6a0%257Cparentrq%253A6a40549315b0a60ce5b522e1fffe9b42%257Ciid%253A5) are bargain.
There's been a few threads here about them.
Fully agree. I picked one up for $100 even though I didn't really need one, and have really enjoyed using it. Even though it was used it was in very good condition, with only a minor scuff on the front rubber protector that wiped right off. All functionality seems to be working correctly.
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KEITHLEY 2015 6-1/2 Digit, about $370 on ebay, sig gen, and thd, seems many here have liked them, and was a fit for me,
just throwing this one out there.
EDIT, i can not recommend this at all, I got a rock, unit in bad shape, had issues as well, sent back and do not recommend it.
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34401A, suggested by many here, is a decent DMM with a resonable price especially now because it is out of production.
But the OP wants to measure low uV signals and this is where 34401 has problems. This multimeter is not suitable for measuring small ac signals, say anything smaller than 400uV ac. For details see e.g. Joe Geller's analysis at http://www.gellerlabs.com/34401a%20ac%20zero.htm (http://www.gellerlabs.com/34401a%20ac%20zero.htm)
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34401A, suggested by many here, is a decent DMM with a resonable price especially now because it is out of production.
But the OP wants to measure low uV signals and this is where 34401 has problems. This multimeter is not suitable for measuring small ac signals, say anything smaller than 400uV ac. For details see e.g. Joe Geller's analysis at http://www.gellerlabs.com/34401a%20ac%20zero.htm (http://www.gellerlabs.com/34401a%20ac%20zero.htm)
To be clear, almost any 'true rms' meter that uses one of the classic AC rms chips will have this problem at the low end of every AC range, around the bottom 5%. Obviously you can avoid the bottom 5% some of the time by switching ranges (as long as the ranges have some overlap, and most meters do) but you can't on the lowest range. So, it's not just HP. This doesn't affect meters that use sampling techniques to calculate rms voltage such as the HP 3458 and some of the newer HP 344xx meters.
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I think I need to bite the bullet and get a bench meter with at least 5.5 digits. I'm trying to troubleshoot some analog parts of an data acquisition system involving low level signals (~10-20 uV) and my Fluke 87V handheld just can't give me enough precision. I've looked around and come up with a few options:
- 2nd-hand older DMM (eg HP 3478A, about $150-200)
- new, lower-end chinese DMM (eg Rigol DM3058E $500)
- new Keithley 2110 ($650)
- refurb Fluke 8808 ($650)
I'm a bit leery about buying an old unit - not so much about the lack of calibration and absolute accuracy; I just don't want to take the risk that it doesn't work reliably.
On paper the Rigol looks like a pretty even match to the Fluke 8808 and Keithley 2110. I've read many of the threads here on the Rigol and while it doesn't get rave reviews, nor does it get bad reviews. In practical terms is there much to recommend it over the other options ? Any other DMM's in that price range that I could consider ?
from my used multimeter buyer's guide (https://www.eevblog.com/forum/testgear/used-multimeter-buyer's-guide/):
GW Instek GDM-8251A. 5.5 digits. this ebay seller has tons for $109/ea (http://www.ebay.com/itm/291980567514?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT). Probably the best bang for the buck right now. Try a 'make offer' around $90.
Keithley 2015 THD. 6.5 digits. this ebay seller has tons for $349.95/ea (http://www.ebay.com/itm/371582307445?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT). An unbelievable deal for a fantastic meter. You will want to replace the electrolytics if you pick one up.
Agilent 34401a. 6.5 digits. Can take a while but you can occasionally pick one up for just under $400 on ebay.
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The 8251 at close to $100 is a bargain. I have several 34401's (great meter) but they typically cost x3 what you can get a good 8251 for at the moment. If I needed another meter I would jump all over a good bench DMM for $100.
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For precision low AC voltage measurements, look for a used Agilent 34410A that is much more stable in the range that you want to measure. If you are lucky, you can pick one up for less that what the 34401A usually goes for.
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I've temporarily rented a Keysight 34461A (quite nice :) wish I could justify buying one outright), but still plan on getting a decent DMM to continue this work over the coming weeks. Currently I've narrowed things down to either:
- Agilent 34401A: around $350-400
- GW Instek GDM-8251A: around $100
Other than my immediate troubleshooting task, I don't think I'll really be needing the precision of the Agilent very often, and hence the Instek is tempting. But I find it hard to go past the solid reputation of the Agilents. Does anyone have comments on the long-term stability of the Instek GDM-8251A ? And how noisy is the fan in it ??
The 8251 at close to $100 is a bargain. I have several 34401's (great meter) but they typically cost x3 what you can get a good 8251 for at the moment. If I needed another meter I would jump all over a good bench DMM for $100.
Would you get the 8251 as your FIRST bench DMM though ?
For precision low AC voltage measurements, look for a used Agilent 34410A that is much more stable in the range that you want to measure.
I haven't had much luck finding 33410A's in the price range I'm looking at now, and I'm more interested in DC signals rather than AC. I'll keep it on the short list though :)
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For precision low AC voltage measurements, look for a used Agilent 34410A that is much more stable in the range that you want to measure. If you are lucky, you can pick one up for less that what the 34401A usually goes for.
I have rarely seen an hp 34410a on ebay, they generally go for 2-3 times what an 34401 goes for.
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If there is a fan in my 8251 it's either very quiet or not working, I have not opened mine (shame on me).
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If there is a fan in my 8251 it's either very quiet or not working, I have not opened mine (shame on me).
I might be mistaken. On a 8251 teardown thread somewhere here on EEVBlog, there was a picture showing a circular opening on the left hand side which I assumed was for a fan. Perhaps just passive ventilation instead then ?
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FYI
One of the lower cost brands is going to release a new 6.5 digit meter shortly.
I don't have details though.
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If there is a fan in my 8251 it's either very quiet or not working, I have not opened mine (shame on me).
I might be mistaken. On a 8251 teardown thread somewhere here on EEVBlog, there was a picture showing a circular opening on the left hand side which I assumed was for a fan. Perhaps just passive ventilation instead then ?
I've opened mine. It doesn't have a fan.
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gdm-8251a is totally silent. no fan.
it's a fine bench dmm especially at $90.
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None of my 3 bench DMMs have fans (GDM-8251a, HP3478a, Fluke 8842a).
Do any bench DMMs have fans? They are low power devices.
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The Keysight 34461A that I've rented certainly does...
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The Keysight 34461A that I've rented certainly does...
Yep, the biggies do.
Anything with a serious ovenised voltage reference will generally need one.
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The Keysight 34461A that I've rented certainly does...
Yep, the biggies do.
Anything with a serious ovenised voltage reference will generally need one.
The 34410A and 34411A also have a fan.
But if you reduce the fan speed by 50%, the noise level is so low that you can almost not hear it anymore and a slower fan speed has really no influence on the performance of the DMM.
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Not 5.5 digit, but a nice price:
http://www.ebay.com.au/itm/Fluke-37-Multimeter-with-New-Battery-/361956632030 (http://www.ebay.com.au/itm/Fluke-37-Multimeter-with-New-Battery-/361956632030)
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Yep, the biggies do.
Anything with a serious ovenised voltage reference will generally need one.
Good to know - and another reason why I shouldn't stray farther in the volt-nuttery direction. ;D
Not 5.5 digit, but a nice price:
http://www.ebay.com.au/itm/Fluke-37-Multimeter-with-New-Battery-/361956632030 (http://www.ebay.com.au/itm/Fluke-37-Multimeter-with-New-Battery-/361956632030)
Whoa! Good score for someone.
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Not 5.5 digit, but a nice price:
http://www.ebay.com.au/itm/Fluke-37-Multimeter-with-New-Battery-/361956632030 (http://www.ebay.com.au/itm/Fluke-37-Multimeter-with-New-Battery-/361956632030)
i reckon its probably still within spec ;D
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Not 5.5 digit, but a nice price:
http://www.ebay.com.au/itm/Fluke-37-Multimeter-with-New-Battery-/361956632030 (http://www.ebay.com.au/itm/Fluke-37-Multimeter-with-New-Battery-/361956632030)
i reckon its probably still within spec ;D
Practically guaranteed.
I like the fact that it has 1000hr battery life, but the form factor of a compact bench meter.
Nice meter to just have on the shelf for everyday measurements if you like the bench use scenario.
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Yep, the biggies do.
Anything with a serious ovenised voltage reference will generally need one.
Good to know - and another reason why I shouldn't stray farther in the volt-nuttery direction. ;D
Fan noise in a lab adds up. Can be bloody annoying.
Volt nuts need to leave stuff on 24/7 too.
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If you are looking vintage, there is a great old bench meter from Germany, made by Goertz Metrawatt BBC ABB
The MA5D
+/- 30.000 count
In the mid 80s it was made for research and development, lots of Universities had them in their labs
You can get them cheap sometimes on ebay Germany
The manuals including schematics are online.
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A bit confused...
My existing Fluke 87V handheld has a quoted accuracy of 0.05% and max resolution of 10 uV. I can put it in mV mode (6 mV range), hi-res mode (20,000 count) and if I'm measuring a signal of few millivolts, it reads down to the nearest 0.01 mV. I checked this against the 34461A and it was pretty spot on.
But the Instek 8251 has a quoted accuracy of 0.012% and a minimum range of 100mV. Does this mean it can also only read down to the nearest 0.012 mV (ie actually slightly worse than the 87V) ?
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The 8251A is 120000 count. On the 100mV range its full scale reading is 120mV and it's resolution is therefor 1uV. The specified accuracy on that range is 0.012% (of full scale I believe) + 8 digits. So any reading on that range should be within 0.012% of 120mV + 8uV = 22.4uV of the actual voltage. (Hope I didn't mess that up...)
EDIT: The FLUKE87V specifies its accuracy on the mV range as 0.1% of reading + 1 digit with a resolution of 100uV. Putting it in high res mode doesn't increase it's accuracy, just the resolution which becomes 10uV but now you have to add 10 digits of uncertainty to the 0.1%. So 120mV should be within 0.1%+100uV=220uV and 10mV should be within 110uV.
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I have an HP 3457A and love it. I do not think you will find a newer unit will be as robust as the older HP stuff.
paul
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Currently I've narrowed things down to either:
- Agilent 34401A: around $350-400
- GW Instek GDM-8251A: around $100
Other than my immediate troubleshooting task, I don't think I'll really be needing the precision of the Agilent very often, and hence the Instek is tempting. But I find it hard to go past the solid reputation of the Agilents.
Unless you need the dual-display of the Instek, I'd suggest getting the 34401A. Even if you don't usually need the full resolution, it'll be there when you do need it. Dive into the details to see if the other greater performance characteristics of the 34401A are worthwhile. Another thing to consider is that if something one day goes wrong with the HP, there's plenty of information and know-how available to repair it or have it repaired.
I've owned three 34401A meters. I currently have a 34401A and a 34410A. (No fan in the 34401A.)
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The 34401a is a excellent and the GPIB interface for VBA software control and data collection is really nice .
Sent from my iPhone using Tapatalk
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If price is a point to you consider this one
http://www.victor-multimeter.com/products/bench-type-multimeter/victor-8145b-dual-display-multimeter-638.html (http://www.victor-multimeter.com/products/bench-type-multimeter/victor-8145b-dual-display-multimeter-638.html)
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Just to stir the mix, I have two more suggestions that I personally have experience. If you are mostly interested in DCV and ohms (2 and 4 wire), the Keithley 191 is an excellent meter that can be had for a bargain (there's something about red LEDs that fascinate me). A bit more complete (full ACV, DCV, ACA, DCA and ohms) is a Racal Dana 5001 - these can be had for a bit more than the 191 but I am pleased with mine.
I just got a pair of 3478As on the cheap but I didn't have yet time to play with them. At first glance the 300000 counts is really a step up from the other two (200000 each) and their operation is very silent.
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The 34401a is a excellent and the GPIB interface for VBA software control and data collection is really nice .
new ones will be spendy, used ones on ebay are a gamble. be prepared to fix them, as i had to with a recent ebay 34401a.
the ebay gdm-8251a (http://www.ebay.com/itm/291980567514) tick every box for OP's requirement, are cheap, basically brand spanking new, and known to work. it's really a no brainer. lowball the seller and walk off with a $90 5 1/2 digit dmm.
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The 34401a is a excellent and the GPIB interface for VBA software control and data collection is really nice .
new ones will be spendy, used ones on ebay are a gamble. be prepared to fix them, as i had to with a recent ebay 34401a.
the ebay gdm-8251a (http://www.ebay.com/itm/291980567514) tick every box for OP's requirement, are cheap, basically brand spanking new, and known to work. it's really a no brainer. lowball the seller and walk off with a $90 5 1/2 digit dmm.
Looks like a nice Agilent clone, but you are stuck with a Chinese meter. I don't know if you could find a lab to NIST certify that brand. If you are using it for work or equipment calibration, I'm sticking with Agilent/Keysite or Fluke.
It is strange to have that USB connector on the back. I don't have and flat USB to flat USB cables.
If I had $100 burning a hole in my pocket, I would order one for shits and grins.
Why would a used Agilent off of EBAY always need repaired if it has a 14 or 30 warranty/return policy?
Is it bad to buy any test equipment off of eBay?
In two weeks I am going to buy a Agilent 33250A, two scope GPIB interfaces, Agilent Attenuators, etc,. Maybe I should get nothing from ebay?
I was going to have a cal lab cett the equipment as soon as I got it. If there a problem, back it would go. I see some sell it with a NIST cert. I emailed on and for about $100-$175 more, I could get the equipment with a new ISO 17025 accredited cert. If I do that, I would think I am somewhat protected against buying duds.
Now Yaa hot me worried. I wasn't going to buy the cheapest I could find. I was going to look for equipment dealers.
Dave
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Why would a used Agilent off of EBAY always need repaired if it has a 14 or 30 warranty/return policy?
Is it bad to buy any test equipment off of eBay?
I have bought lots of Agilent / Keysight and other brand gear of ebay.
Sometimes broken and it needed repair
And sometimes the seller claimed it was broken and in reality it was perfectly working - no repair needed.
And many times I have bought good working gear for unreal little money.
The smallest amount of money I paid for a good working 34401a was 150 Euro
And two 34410A (broken) for almost nothing and both got repaired perfectly.
It is always a risk but at least for me it was more than worthwhile.
I would always prefer an Agilent 34401A over a China clone.
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Chinese meter or Malaysia meter wasn't that difference
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Chinese meter or Malaysia meter wasn't that difference
It's not the geographic region of manufacture that's the difference, although it often sounds that way. It's the brand and, hence, the likelihood of third-party (and sometimes even first-party) support. If you need to have a bench DMM serviced, which brands are more likely to be supported by a test equipment calibration and/or repair service? HP/Agilent/Keysight, Fluke, Keithley, etc. or Rigol, Siglent, Instek, etc.?
Not everyone necessarily needs that level of service. But, if you do, then that makes a difference.
If you repair your own equipment, availability of service information and parts are other factors. That's something where even brand doesn't necessarily make the difference. Often, it's the age of the equipment that makes or breaks DIY serviceability.
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none of these requirements appear to be a concern of the OP.
it sure doesn't sound like OP is going to be running a cal lab. nor are calibration or absolute accuracy requirements of the OP.
just tested some microvolt readings. gw instek gdm-8251a, keithley 2015thd, agilent 34401a. 10uv would be pushing limits of the 8251a. 34401a readings are very unstable at this range. keithley 2015thd was very stable.
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Just wrapping up this thread. I ended up getting a second-hand Agilent 34401A. Spent about US$350 for a unit in pretty clean condition, good display, and as best I can tell, about 10-11 years old. It is out of calibration, but only just (was calibrated last year, due for re-cal in Jan 2017). Shipping to Aus was a bit of a hassle to organise, but ended up ok in the end.
To be honest, the Instek 8251 would have been sufficient for the work I had to do in the short term, and if money was very tight I would have bought one. But I'm happy that I've now got a unit which I can rely on for many years to come.
Thanks to all who posted their thoughts and suggestions. All very helpful.
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KEITHLEY 2015 6-1/2 Digit, about $370 on ebay, sig gen, and thd, seems many here have liked them, and was a fit for me,
just throwing this one out there.
EDIT, i can not recommend this at all, I got a rock, unit in bad shape, had issues as well, sent back and do not recommend it.
That sucks. I recently bought a 2015 off eBay for about $450.00 plus freight. I was willing to pay more for fresh cal, a bright clear display with apparently low hours, clean physical condition and a handle included. I've been extremely happy so far.
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Aaaaah you didn't go for the current Australian ebay 34401A for AU$500 + $45 shipping? US$350 is close to AU$545 at the moment, and for $45 domestic shipping it should be coming to your door very fast on a velvet cushion....
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Aaaaah you didn't go for the current Australian ebay 34401A for AU$500 + $45 shipping? US$350 is close to AU$545 at the moment, and for $45 domestic shipping it should be coming to your door very fast on a velvet cushion....
sorry, that one came up AFTER I'd already gone ahead with one from the US ;)
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KEITHLEY 2015 6-1/2 Digit, about $370 on ebay, sig gen, and thd, seems many here have liked them, and was a fit for me,
just throwing this one out there.
EDIT, i can not recommend this at all, I got a rock, unit in bad shape, had issues as well, sent back and do not recommend it.
who was the seller? the one I got from vswitzer2902 was good shape and fully working except THD measurement. I still have to diagnose that.
http://www.ebay.com/itm/371582307445 (http://www.ebay.com/itm/371582307445)
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sorry, that one came up AFTER I'd already gone ahead with one from the US ;)
Heh, I've been looking for a good usable 6.5 for the last month and when that showed up I kept coming back to it and hovering over the buy button, but wishing it was a bit cheaper for its condition and level of testing, and possibly resenting the shipping price more than a little bit.
Now I have a keithley 2700 on its way from thesteve. similar landed price, but I really like the idea of the installable switching options on the 2700. And at least the cal of this 2700 has been compared to something else by someone on the forum who knows his stuff.
So now I guess I can sit tight and have something good that's usable for the foreseeable future, and wait for a really killer deal on a 34465A to eventually come along, one day.
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Congrats, Julian. The K2700 is nice (I have one, too). It's like the venerable K2000, but with the dual scanner slots and more onboard logging memory.
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Wow.... This one looks like a toy..
http://m.ebay.com/itm/5-1-2-Bench-Multimeter-3-5TFTLCD-Square-Wave-Output-Trigger-Test-USB-RS232-/302293939724?_trkparms=aid%253D222007%2526algo%253DSIC.MBE%2526ao%253D1%2526asc%253D20150519202348%2526meid%253De20d5d7fdef740428a2c131d80c5484f%2526pid%253D100408%2526rk%253D18%2526rkt%253D25%2526sd%253D371582307445&_trksid=p2056116.c100408.m2460 (http://m.ebay.com/itm/5-1-2-Bench-Multimeter-3-5TFTLCD-Square-Wave-Output-Trigger-Test-USB-RS232-/302293939724?_trkparms=aid%253D222007%2526algo%253DSIC.MBE%2526ao%253D1%2526asc%253D20150519202348%2526meid%253De20d5d7fdef740428a2c131d80c5484f%2526pid%253D100408%2526rk%253D18%2526rkt%253D25%2526sd%253D371582307445&_trksid=p2056116.c100408.m2460)
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Wow.... This one looks like a toy..
*snip*
Who is going to buy one, and tear it down
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Someone with a pretty good teardown budget. ^-^
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The 6 1/2 digit version is $899.99. Yeah, with that cash I would be sporting a Keysight meter.
I would love to see a tear down. :popcorn:
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I maybe stand corrected. Those meters are rated @ 1000vdc and 750vac input. :-DD
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The 6 1/2 digit version is $899.99. Yeah, with that cash I would be sporting a Keysight meter.
I would love to see a tear down. :popcorn:
Hey, I found a bargain! the 6-1/2 for $685 only! (plus $85 shipping)
http://www.ebay.com/itm/6-1-2-Bench-Multimeter-Hi-accuracy-DCV-0-0035-3-5TFTLCD-USB-RS232-LAN-Trigger-/302295918267?hash=item46623da6bb (http://www.ebay.com/itm/6-1-2-Bench-Multimeter-Hi-accuracy-DCV-0-0035-3-5TFTLCD-USB-RS232-LAN-Trigger-/302295918267?hash=item46623da6bb)
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I like the smashed USB connector. :palm:
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me too and the 300$ added for one digit more loll
A teardown would be nice, don't know if those models are popular or worthwile ??
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This one has a "Hi-accuracy" for $ 890 and still has a bad USB connector, :-DD
Who would buy anything like this?
http://www.ebay.com/itm/Hi-accuracy-6-1-2-Bench-Multimeter-3-5TFTLCD-USB-RS232-LAN-GPIB-Trigger-In-Out-/282455516837?hash=item41c3a926a5:g:yuQAAOSw4A5Ytuvv (http://www.ebay.com/itm/Hi-accuracy-6-1-2-Bench-Multimeter-3-5TFTLCD-USB-RS232-LAN-GPIB-Trigger-In-Out-/282455516837?hash=item41c3a926a5:g:yuQAAOSw4A5Ytuvv)
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This one has a "Hi-accuracy" for $ 890 and still has a bad USB connector, :-DD
Who would buy anything like this?
But, but it goes up to 12A! >:D