hybridfree/eevblog-posts huggingface dataset:
What brand of scope probes are built to last? - Page 1
Forum section: electronics / testgear

author: e100
author_rank: Frequent Contributor
timestamp: June 14, 2018, 01:54:58 pm
content: The hook tips on the scope probes that came with my Rigol DS1052E are no longer hook shaped. They are more like an L shape so there's not much stopping them from sliding off. I'm not sure if a mm or so of metal has broken off, or if they have just bent opening up the hook.Do some brands or designs last longer than others, if so what should I look for?

author: nctnico
author_rank: Super Contributor
timestamp: June 14, 2018, 01:59:52 pm
content: The ones from Testec are decent but you have to realise that probes are consumables. None will last forever.

author: Fungus
author_rank: Super Contributor
timestamp: June 14, 2018, 05:22:47 pm
content: How long did they last?You can get new probes as good as the ones that came with your Rigol for $15. Anything more than that is overkill, really. None will last forever.

author: Gyro
author_rank: Super Contributor
timestamp: June 14, 2018, 05:34:00 pm
content: Quote from: e100 on June 14, 2018, 01:54:58 pmIt's pretty unusual for them to actually loose any metal, they normally just bend with use. Try gently re-shaping the extended hooks with some fine nosed pliers. It should at least buy you some life extension - best case, complete fix.

author: cheeseit
author_rank: Regular Contributor
timestamp: June 14, 2018, 05:45:35 pm
content: I've had no problems with my Testec probes and I've seen the Testec hook clip sold separately for peanuts, maybe you can find hook clips for Rigol probes too.

author: slurry
author_rank: Regular Contributor
timestamp: June 14, 2018, 06:16:01 pm
content: It sounds like you are not careful enough and put way too much stress on the hook if it straightens out.Testec probes are actually really good for the money
Frist Frequency counter, how about this one? - Page 1
Forum section: electronics / testgear

author: AngraMelo
author_rank: Regular Contributor
timestamp: June 14, 2018, 12:06:00 am
content: Hey guys, Im looking to buy my first frequency counter. I dont know what Im supposed to be looking in one.I have a few frequency generators here (nothing high end).After some research I did find this one:https://produto.mercadolivre.com.br/MLB-1046356524-frequencimetro-advantest-150mhz-usado-com-garantia-_JMIt is an advantest Universal Counter. It is used and it seems to be in good shape. THe store selling it is actually a specialized store that mainly deals with measurement equipment, they also offer a 6 month guarantee.As I live in Brazil it is relatively hard to find good stuff for a decent price. Importing taxes are super high and what you guys find on ebay for 100 dollars here in Brazil to get someone of the same quality used would be somewhere around 250.The price of the is in Brazilian Reals so the convertion is: for every dollar you can buy around 3.6 ReaisIf you could give me some light as to what Im supposed to be looking in a frequency counter and if anyone knows anything about this advantes it would be great.thank you

author: David Hess
author_rank: Super Contributor
timestamp: June 14, 2018, 01:47:08 am
content: I read thedatasheet and the Advantest TR5821is very comparable to the HP5315A/B and HP5316A/B; it is a reciprocal counter with 100ns internal timing resolution producing 7 digits per second.I do not know why you think that you need a universal counter but this is a fine choice for general purpose work.

author: AngraMelo
author_rank: Regular Contributor
timestamp: June 14, 2018, 01:07:38 pm
content: Quote from: David Hess on June 14, 2018, 01:47:08 amHey David, thanks for replying. I did not know universal counters were different than frequency counters. I will do my research about them

author: David Hess
author_rank: Super Contributor
timestamp: June 14, 2018, 03:25:05 pm
content: Quote from: AngraMelo on June 14, 2018, 01:07:38 pmA frequency counter just measures frequency and maybe period and width using one channel. A universal counter can also make two channel measurements like time interval and ratio.
ONO SOKKI Spare parts - Page 1
Forum section: electronics / testgear

author: drtube
author_rank: Contributor
timestamp: June 13, 2018, 09:36:55 pm
content: Hello,I'm looking for an option for ONO SOKKI 350/360 FFT ANALYZER, it's the CF-0383 Signal Output card. If anyone has one of these analyzers with that option installed and you are willing to sell it, please reply this post or send a PM with pretended price.I attach the only photo of the option I could find online (credits to psykok), I found it on this thread:https://www.eevblog.com/forum/repair/ono-sokki-cf350-fft-analyzer-needs-repair/As this is an old japanese product it's very very hard to find spare parts online to buy. If you are aware of any service / surplus center who may have these kind of parts for sale please let me know.Thank you all for your time,DrTube
Fluke 8922A RMS Sensor - Page 1
Forum section: electronics / testgear

author: granfaloon
author_rank: Newbie
timestamp: March 22, 2014, 02:27:54 am
content: Hello everyone!I recently acquired a Fluke 8922A True RMS Multimeter. It seems the RMS to DC converter IC U1 has gone bad.As per the manual, I should see around 100 ohms on its input pins however I'm reading 1K to ground leading me to believe one of the input heater resistors have blown open.Anyone know where I can find a replacement for this IC? According to the manual it's listed as a RMS SENSOR Part# 433839. I know it's probably a lost cause since this seems to be a proprietary Fluke IC but I'm not giving up hope yet.

author: Vgkid
author_rank: Super Contributor
timestamp: March 22, 2014, 03:36:32 am
content: Ebay, or specialty surplus sellers may have them.Did yoy try doing a google search of the part number?

author: kridri
author_rank: Contributor
timestamp: June 13, 2018, 01:44:19 pm
content: Did you find a replacement IC?Or have you still the unit?I recently obtained a Fluke 8921A from which someone removed IC U205.This is the mail controller of the unit.GreetzKris
AD584LH Laser etched or silk-screened can? - Page 1
Forum section: electronics / testgear

author: voltlog
author_rank: Regular Contributor
timestamp: June 19, 2018, 01:47:16 pm
content: I am looking to buy the cheap AD584LH (LH version is higher stability, inside metal can) voltage reference to be used for checking multimeters in my lab. I plan to build an enclosure and have it calibrated at a cal lab so that I could base future measurements on that. I know the AD584LH is not being manufactured anymore so what they are selling must be new old stock or even salvaged components which doesn't bother me at all considering the increased stability of an aged voltage reference.However I am noticing two different style of marking in seller pictures, one style has laser etched part number while the other appears to have the part number silk-screened with black ink.In your experience what should the original one look like? Or did they make them both style originally?

author: GeorgeOfTheJungle
author_rank: Super Contributor
timestamp: June 19, 2018, 02:51:44 pm
content: The older one (0732) has serigraphy the newest (1015) is laser etched, makes sense.

author: WhichEnt2
author_rank: Regular Contributor
timestamp: June 19, 2018, 03:17:21 pm
content: Both.And some sellers can't have control over such nuances. It can be possible to receive laser etched device from lot with a paint marked on a lot pic.

author: voltlog
author_rank: Regular Contributor
timestamp: June 19, 2018, 04:27:45 pm
content: Quote from: GeorgeOfTheJungle on June 19, 2018, 02:51:44 pmmakes sense in engineer logic but who knows what that means in gray market senseQuote from: WhichEnt2 on June 19, 2018, 03:17:21 pmTrue, but I can at least ask before purchase and if they send me something else I can ask for a refund.
counting pulses bewteen events with Rigol 1054z - Page 1
Forum section: electronics / testgear

author: Dan Moos
author_rank: Frequent Contributor
timestamp: June 13, 2018, 01:05:38 am
content: Lets say I'm triggering on a digital signal on channel 1, and I want to know how many pulses happen on channel two between pulses on channel one. Can my 1054z (fully hacked) do this?I know there is a #pulses measurement function, but as far as I can tell, it just counts how many pulses are on the screen, which is useless unless the data randomly happens to fit exactly in one screen width.What would be ideal is a "number of pulses between cursors" measurement.I realize I can laboriously count graticule lines and use the time per division setting to "do the math", but I want to know if there is a feature that can do this.I'm also certain my Saleae software can do this, but setting up the analyzer is a pain for such a simple task.

author: Dan Moos
author_rank: Frequent Contributor
timestamp: June 13, 2018, 01:29:48 am
content: nevermind, figured it out. Found the "range" setting on the second screen of the measurement menu. Can select either screen, or cursor. Seems to be completely independent of the regular cursors as far as I can tell.Can't believe I never discovered this feature before. Could have used it MANY times!

author: bitseeker
author_rank: Super Contributor
timestamp: June 13, 2018, 04:25:10 am
content: Ah, good to know. I haven't used that before, either. Thanks, Dan.
Really small Metcal/Thermaltronics tips < 0.4mm - Page 1
Forum section: electronics / testgear

author: Jester
author_rank: Frequent Contributor
timestamp: June 11, 2018, 10:19:02 pm
content: My go to Metcal tip for general purpose use is a STTC-144 Conical 30deg sharp bent 0.5mmI also have a couple of Conical 0.4mm tips as well, however for really small components, however all of these tips are too large for the pads being soldered, so I'm looking for a smaller tip for occasional use.It seems that as tip size decreases, the tip becomes more fragile and likely to oxidize.Metcal/Thermaltronics offer tips as small as 0.1mm, 0.2mm, 0.23mm and 0.25mm.These will typically be used for rework of a lead free board, where I use leaded solder after the rework.I would really like to hear from anyone that has used these smaller tips, regarding longevity and if one you had to chose one particular tip in this size range, what would it be?
sds1104X-E Additional wifi adapters? - Page 1
Forum section: electronics / testgear

author: timgiles
author_rank: Regular Contributor
timestamp: June 10, 2018, 11:03:01 am
content: Hi all,The latest firmware mentions support for additional wifi adapters - but not which ones. Anyone know?

author: tautech
author_rank: Super Contributor
timestamp: June 10, 2018, 06:33:51 pm
content: Quote from: timgiles on June 10, 2018, 11:03:01 amSorry I don't however the original dongle specified is from TP-Link model TL‐WN725N Gold version.It's widely available for less than $15.If additional drivers are indeed installed in FW V6.1.25R2 just try any WiFi dongles you have already and the display will show when one it recognizes is connected to USB.When I beta tested them the only one I had was from a Samsung TV and the DSO didn't recognize it so I popped into my local PC shop and got the TL‐WN725N Gold version for NZ$20.I'll ask Siglent today about additional types supported so should have a reply in say 12 hrs.

author: tautech
author_rank: Super Contributor
timestamp: June 12, 2018, 03:32:14 am
content: Quote from: timgiles on June 10, 2018, 11:03:01 amOK so the official word is 25R2 allows use of more types of TP-Link model TL‐WN725N, but it seems unfortunately no others.The chrome/silver version of TL‐WN725N is more readily available and a bit cheaper than the gold version.

author: toli
author_rank: Frequent Contributor
timestamp: June 12, 2018, 05:25:09 am
content: Just be make sure I understand this properly, no matter what WiFi adapted I get and where I get it, I would still need to purchase the WiFi software option (69$ IIRC) to be able to use it, even with the latest fw version, right?

author: tautech
author_rank: Super Contributor
timestamp: June 12, 2018, 07:08:47 am
content: Quote from: toli on June 12, 2018, 05:25:09 amCorrect and only once the free trial times expirebutthere is another WiFi solution if you want to follow the solution Bob Sava took:https://www.eevblog.com/forum/testgear/cheap-wifi-for-sds1000x-e/The WiFi dongle option is neat and tidy but Bob's solution might be equally fine for some users.
Rigol DP-831 vs DP-832   3A/5A - Page 1
Forum section: electronics / testgear

author: Gtx21
author_rank: Contributor
timestamp: June 11, 2018, 03:38:50 pm
content: I'm Looking at the Rigol DP-831 Power Supply. The extra 2A on the first channel seem extremely appealing to me, though I see most people opting for the DP-832. Is the 3A limit on the DP-832 not an issue for most people?Perhaps the 2A limitation on the other 2 channels is bigger killer?Now that USB can hit 5A, I expect that we'll be seeing a significant increase in devices that get up to 5A in the near future.

author: LaurentR
author_rank: Frequent Contributor
timestamp: June 11, 2018, 04:33:41 pm
content: Quote from: Gtx21 on June 11, 2018, 03:38:50 pmOn the supplies themselves, the DP832 has more power and is more versatile. the DP831's Ch2/3 arrangement as +/- is useful for some applications, but not as versatile as the two independent Ch1/2 30V/3A of the DP832, especially once you consider series/parallel arrangements (you can do 30V/6A with the DP832 Ch1/2 if you need more amps, which you can't on the DP831 with Ch2/3).It would be nice to have 8V/5A on Ch3 of the DP832, I agree, but in many applications, 5A is pushing the cables and with no sense function on either, I'd say it is not a commonly used current level (and again, you can do 6A with the DP832 by using parallel mode if you really need to).As for USB and 5A, I am not that convinced. 5A is only available with the newer type C power delivery and only with special active cables and devices at both ends negotiating 5A. If you look at current USB power devices (like type-C PD laptops and mobile QuickCharge), they all use high voltage (up to 20V) and 2A (sometimes 3A) current so that they can keep off-the-shelf cables. So I see 5A only used in laptop chargers needing to push 100W instead of 60W max with their own cable. It doesn't seem to be made for random USB devices and off-the-shelf cables (those will go high-voltage first).

author: IAmBack
author_rank: Regular Contributor
timestamp: June 11, 2018, 04:35:47 pm
content: Output configuration of the two is different. With 832 it's possible to get typical "digital + symmetrical analogs" supply as well as "digital plus two different analogs", while with 831 only first option is possible. Also, 30V/6A and 30V/6A configuration is possible with 832 (not with 831). And finally, it's quite easy to find quite cheap and powerful PSU for digital with high current requirenets…Just my 2 cents.

author: 2N3055
author_rank: Super Contributor
timestamp: June 11, 2018, 07:33:16 pm
content: I personally got 831 specifically for symmetrical +-30 + 1 lower voltage for digital for opamp +digital mixed signal stuff.I have other PSU for more current or voltage..
the Keysight U1272 ADC - Page 1
Forum section: electronics / testgear

author: niner_007
author_rank: Frequent Contributor
timestamp: June 11, 2018, 08:22:49 am
content: The Keysight U1272 multimeter is using an 24-bit ADC, the TI ADS1242, it seems like with this ADC, given its performance, they could've implemented a 5.5 digits meter (assuming probably better references, amplifiers etc than the U1272 is currently using). Why did they use such a high resolution ADC? They could've used an 18-bit ADC instead.

author: Mr. Scram
author_rank: Super Contributor
timestamp: June 11, 2018, 08:42:54 am
content: Quote from: niner_007 on June 11, 2018, 08:22:49 amDevices like the 34401A also make measurements are higher resolutions than needed. I think it's done to ultimately eleminate noise.

author: wraper
author_rank: Unknown
timestamp: June 11, 2018, 10:39:48 am
content: Quote from: niner_007 on June 11, 2018, 08:22:49 amQuoteIt's not like this is too expensive component as well. It's not necessarily they would save money by using lower spec ADC. 18 bit ADC with effective 18 bit resolution likely won't be any cheaper. And some excessive resolution is useful for calibration. You could also skimp somewhere else in the circuit by not using full input voltage range of ADC because you have excessive resolution.

author: David Hess
author_rank: Super Contributor
timestamp: June 11, 2018, 11:07:59 am
content: Any extra digits would not be significant. Even if a better reference and divider were used, the variable input resistance (1) would limit accuracy. 0.05% basic DC accuracy is 1 part in 2000 so even with "only* 30,000 counts, that is 10 times greater resolution than the accuracy will support which is typical for 4.5 digit meters and many of the other functions are 10 times worse than that.(1) The specifications say "10 MΩ (nominal)" which is marketing speak for "not 10 MΩ and it varies all over the place".
Cover caps for 4mm sockets? - Page 1
Forum section: electronics / testgear

author: Faith
author_rank: Unknown
timestamp: June 11, 2018, 02:44:27 am
content: Not sure if this is the right place to post this... but does anyone cover the 4mm sockets on their handheld meters and if yes where'd you get them from?A couple of days ago I took out one of my lesser used meters from my toolbox and I got an amps input warning on the volts range and I was like "WTF?" Took a look into the socket and lo and behold a tiny screw made its way inside.Yeah, don't judge :p stuff moves around.Anyway given that I don't use amps that much compared to everything else I figured maybe I could just apply some cover on them or whatever but I can't for the life of me find any online.I usually have my probes permanently connected to the other sockets so those are fine.

author: apblog
author_rank: Regular Contributor
timestamp: June 11, 2018, 04:45:25 am
content: My Fluke meter came with rubber covers so I imagine you could get them from Fluke. also I bet Pomona has some kind of dummy plastic plug.

author: Faith
author_rank: Unknown
timestamp: June 11, 2018, 05:08:02 am
content: Yeah tried searching ): couldn’t find any.Which Fluke model by the way? Just curious as I don’t recall mine coming with any...

author: apblog
author_rank: Regular Contributor
timestamp: June 11, 2018, 05:26:45 am
content: Fluke 289

author: Muttley Snickers
author_rank: Unknown
timestamp: June 11, 2018, 06:16:44 am
content: Some of the weather proof CEM multimeters are also supplied with the jack caps probably to maintain their IP?? rating but I've never seen them available separately.. You could easily turn some up on a lathe or spit a few out on a 3D printer if you happen to know somebody with these machines. There are plenty of other options as well, for instance the plastic 4mm PCB stand-offs are a nice fit, work a treat and no big deal if they get lost.

author: WhichEnt2
author_rank: Regular Contributor
timestamp: June 11, 2018, 06:34:48 am
content: You can't find it, srsly?https://www.google.com/search?hl=en&q=fluke+amp+jack+plug+set&oq=fluke+amp+jack+plug+set

author: BravoV
author_rank: Super Contributor
timestamp: June 11, 2018, 06:55:26 am
content: Yep, used it at my Fluke 287 above, as I rarely use current measurement, here the part number for Fluke.

author: Faith
author_rank: Unknown
timestamp: June 11, 2018, 07:16:20 am
content: Quote from: WhichEnt2 on June 11, 2018, 06:34:48 amYeah, I was originally searching more along the lines of "4mm banana socket cover" and quite a few variations thereof."Fluke amp jack plug set" seems rather specific :pQuote from: BravoV on June 11, 2018, 06:55:26 amPerfect. Thanks much!~
Sydney calibration lab recommendations - Page 1
Forum section: electronics / testgear

author: Synthtech
author_rank: Regular Contributor
timestamp: June 10, 2018, 10:18:40 am
content: I am looking for recommendations for calibration labs in Sydney for multimeter calibration for my Agilent 34401A and Keysight U1282A and an Advantest R1642 voltage/current generator. Are there any Sydneysiders here who use local cal services and have any recommendations or comments?

author: Kean
author_rank: Unknown
timestamp: June 10, 2018, 12:09:06 pm
content: I've not used one, but I'm certainly also interested...

author: dave_k
author_rank: Frequent Contributor
timestamp: June 10, 2018, 10:55:55 pm
content: Try Rohde & Schwarz in North Ryde

author: EEVblog
author_rank: Unknown
timestamp: June 10, 2018, 11:55:40 pm
content: You could try Emonahttp://www.emona.com.au/Pages/calibrations.htmlBasic multimeter cal check price starts from $121 inc GSTAll prices here:http://www.emona.com.au/Calibration/calibration-charges.html$187 for 5.5 digit, not sure if they have the ability to do greater.

author: Synthtech
author_rank: Regular Contributor
timestamp: June 11, 2018, 08:49:57 am
content: Quote from: EEVblog on June 10, 2018, 11:55:40 pmThanks Dave, I do use Emona for certifying my PAT each year, the last time that I asked they said that they can’t do 6.5 digit meters but maybe I should check back and see if that’s still the case, it looks like they are selling Fluke calibration equipment so maybe they have upgraded their own cal service. I guess that they can do the 60,000 count keysight handheld and maybe the Advantest and they are nearby so I will give them a call.

author: deadlylover
author_rank: Frequent Contributor
timestamp: June 11, 2018, 09:10:16 am
content: Hi mate you could try getting in contact with TR Calibrations down near Prestons.I think I got my 34401A calibrated there for around $200, it was a NATA accredited cal. (adjustments on the ACV ranges were approx another 200 on top, it was a meter I repaired)My memory could be waaay off though, I can't find the darn quote in my inbox anymore. For the 34401A they just whack it on their Fluke calibrator IIRC.I've got the report somewhere...if you'd like to have a look at it I can upload the data. (might be a couple days though my garage is a mess atm)

author: Synthtech
author_rank: Regular Contributor
timestamp: June 11, 2018, 09:21:35 am
content: Quote from: deadlylover on June 11, 2018, 09:10:16 amThank you, I will give them a call, sounds like a good lead.
KEITHLEY 2000 vs HP 34401A - Page 1
Forum section: electronics / testgear

author: alexcesarpalma
author_rank: Newbie
timestamp: June 09, 2018, 05:25:53 am
content: It's the first time that i will buy a precision multimeter for developing a board. In my country(México) are selling two used multimeters: a KEITHLEY 2000 for $200USD and an HP 34401A for also $200USD. This two masterpieces have similar specs but, i wanna know what do you recomend, in therms of year of fabrication, speeds, facility of repair, etc..., Which one is the best?

author: bitseeker
author_rank: Super Contributor
timestamp: June 09, 2018, 05:48:16 am
content: They're both great meters. And at that price, get both!If you must choose one, some like the larger digits on the 34401A. If you get the K2000, be sure to check the electrolytic capacitors (there are threads here about changing them).From the photos, it looks like the VFD in the 34401A is a lot brighter than the one in the K2000. However, it could be different in real life.The "best" one is the one that fits your needs. Stating your requirements and what you'll use it for (what kind of boards are you designing) will help forum members help you better.

author: TimNJ
author_rank: Super Contributor
timestamp: June 09, 2018, 04:02:00 pm
content: The K2000 digits are physically much thinner than the 34401A. I have a K2010 and have used a 34401A at work/school. I actually really like the fine digits of the Keithley, but ultimately, doesn't really matter. I think the fine digits of the Keithley will be harder to see with age, compared to the thicker HP digits. Both are constructed well. If they are at least 15 years old, I'd recommend re-capping them as mentioned above. Just beware of getting oils and dirt on the PCB as that can throw off some of the sensitive circuitry. You should clean flux residue off the board, but still try to clean as little as possible, if that makes sense.

author: capt bullshot
author_rank: Super Contributor
timestamp: June 09, 2018, 05:37:53 pm
content: From beeing used to use a Keithley 2015 (this is a 2000 in disguise) and a HPAK 34401A - I'd always prefer the 34401A.This is for different reasons, each one of minor concern, but in total the 34401A is my preferred choice.

author: pelule
author_rank: Frequent Contributor
timestamp: June 09, 2018, 06:37:31 pm
content: I have both - K2000 + Scanner Card (2014 build) and HP34401A (1996 build).34401A has less noise floor - mentioned in several threads - thus a better precision. The VFD is easier to read from the distance.The K2000 has a bit more functions.I use the K2000 for multi-channel measurements/logging, the HP for single channel measuremnts/logging.I can recommend both products./PeLuLe
The much-maligned Tek 11401 DSO... - Page 1
Forum section: electronics / testgear

author: precaud
author_rank: Frequent Contributor
timestamp: June 08, 2018, 09:48:25 pm
content: Yes, the user interface is tortuous, and it is a bona-fide member of the boatanchor club. But with an 11A32 preamp, it is the cleanest 10-bit measurement system I've ever encountered.Attached is a low-distortion ~ 1kHz 1Vpp sinewave through the combo. Yellow trace is two time-domain averages; blue trace is 64 averages. The latter gives more than 20dB signal-to-noise ratio improvement across the spectrum, right into 14-bit territory. That is one clean preamp / A to D converter.It is pretty much the same with a 100kHz sine.Contributing to the good dynamic range is, the 1140x units do their averaging in real math, not summed integers.
Grounding front panel terminals on test equipment - Page 1
Forum section: electronics / testgear

author: Scratch.HTF
author_rank: Regular Contributor
timestamp: June 09, 2018, 02:20:48 am
content: I've seen a number of pieces of mains powered test equipment which is not grounded including units with switching power supplies, and some of you may know that AC leakage current (typically around 0.2-0.5mA) in such units is at the front panel connectors which is caused by Y-class capacitors used for RFI/EMI suppression.To avoid this kind of problem, I have a policy of using external power supplies with the mains ground tied to the secondary side ground (via an appropriately rated choke if necessary) and having the same for units with an internal power supply.
CF350 FFT ANALYZER (info+photos+manual request) - Page 1
Forum section: electronics / testgear

author: drtube
author_rank: Contributor
timestamp: June 08, 2018, 02:00:50 am
content: Hello,I bought this FFT Analyzer few days ago in an auction. As far as I know it's a very specialized instrument intended for vibration analysis and acoustics. I'm trying very hard to find the operation manual for this instrument, but I had no luck so far. Does anyone have a copy of the manual for this instrument? If you do and you are willing to sell it, please send PM with price.I share some photos and the info I have; I think it is the "brochure" for the instrument or some advertising document.Thanks!!

author: drtube
author_rank: Contributor
timestamp: June 08, 2018, 02:02:10 am
content: More info

author: drtube
author_rank: Contributor
timestamp: June 08, 2018, 02:04:25 am
content: More info

author: drtube
author_rank: Contributor
timestamp: June 08, 2018, 02:08:24 am
content: More info
FLUKE 289 - Other Brand's that have a Comparable Model's - Page 1
Forum section: electronics / testgear

author: nytefog
author_rank: Newbie
timestamp: June 07, 2018, 02:58:47 pm
content: Hello,I like to know what other DMM Manufacturers make a meter that is comparable to the FLUKE 289?Although the Fluke 289 is slow to boot up, and is large, I love it's accuracy and fuunctions. I like to know who makes a DMM that is comparable.If I had the cash I get the new Gossen Metrahit M273C! That meter looks amazing..for $2000! I have the Metrahit Energy and also the Metrahit Coil. I might sell one to possibly help me.fund the purchase of the M273C! The Energy and Coil are in like new condition and haven't been used much.! I thought the Coil would be a good alternative For a insulation tester, but it doesnt cime close to the capability of my Megger MIT420.So if any one is interested in the Gossen Metrawatt Metrahit Coil DMM with leads and Coil adapter.Thanks for any input!

author: PedroDaGr8
author_rank: Super Contributor
timestamp: June 07, 2018, 03:31:03 pm
content: Brymen BM869S is comparable and runs around US$250 on TME.eu, it is also available as the Greenlee DM-860A.Also, if you want to make a sale, you should remove that part and post it in the B/S/T section of the forum. Otherwise you risk getting your post deleted.
uCurrent - wrong gain/shunt on 1mV/1mA range - Page 1
Forum section: electronics / testgear

author: JohnnyMalaria
author_rank: Super Contributor
timestamp: June 11, 2018, 07:09:42 pm
content: Hi,I've noticed that the apparent gain for my uCurrent Gold is wrong on the 1mV/1mA range (10m shunt). It should be 1000 but seems to be 3X that.Attached are plots of some resistors I measured (I capture the source voltage and uCurrent output via a DAC at 16kHz using a 1Vpk sinewave anywhere between 1 and 500Hz.)The left plot for resistors ranging from 220R to 5.5K using the 1mV/1uA. The values calculated using the uCurrent output are the expected values.The right plot is for resistors ranging from 5R to 220R using the 1mV/1mA range. The values calculated using the uCurrent output are a third of the expected values.The 220R was tested with both ranges.So, my unit is behaving as if the 10m shunt is actually 3.3m.Thanks.Has anyone else come across any discrepencies at the1mV/1uA1mV/1mA setting? (Sod's Law it's the one of most importance to me.)EDIT: typo - wrong range

author: JohnnyMalaria
author_rank: Super Contributor
timestamp: June 12, 2018, 02:53:57 pm
content: Thanks.I copied/pasted incorrectly (see edit). I meant the 1mV/1mA range is where my problem is showing up.

author: JohnnyMalaria
author_rank: Super Contributor
timestamp: June 12, 2018, 06:40:26 pm
content: Quote from: PeDre on June 12, 2018, 06:25:50 pmI don't think so because I made all the measurements on both ranges without changing the off-on-short switch. But I'll check since you got 1/3 that way.Thanks.
Laserliner multimeter - Page 1
Forum section: electronics / testgear

author: thanasisk
author_rank: Regular Contributor
timestamp: June 05, 2018, 08:19:13 pm
content: Any opinions / experience with this multimeter? Bought from conrad a couple of years ago. I do not believe it is true rms.http://laser-liner.co.uk/product/multimeter-compact/
Ampere ranges doesn't work on ANENG 8008 - Page 1
Forum section: electronics / testgear

author: Free_WiFi
author_rank: Regular Contributor
timestamp: June 06, 2018, 04:33:08 pm
content: Can you tell me something about how can i solve this problem ?Thanks.

author: Free_WiFi
author_rank: Regular Contributor
timestamp: June 06, 2018, 04:35:45 pm
content: I bought this aneng 8008 from Banggood.comand seems like i'm the only one who's complain about this meter.

author: ataradov
author_rank: Super Contributor
timestamp: June 06, 2018, 04:36:04 pm
content: The fuse is blown, and by running motors on uA range you will blow the other one sooner or later.

author: Free_WiFi
author_rank: Regular Contributor
timestamp: June 06, 2018, 04:37:44 pm
content: Quote from: ataradov on June 06, 2018, 04:36:04 pmNo they aren't,i check them all with another multimeter and they are fine.

author: ataradov
author_rank: Super Contributor
timestamp: June 06, 2018, 04:40:33 pm
content: Then it is impossible to tell without further investigation.

author: Free_WiFi
author_rank: Regular Contributor
timestamp: June 06, 2018, 04:41:19 pm
content: However i run on uA just to show you on the video the behavior of the meter.

author: ataradov
author_rank: Super Contributor
timestamp: June 06, 2018, 04:43:53 pm
content: Wait a second. You never change probes to the "A/mA" plug.

author: Free_WiFi
author_rank: Regular Contributor
timestamp: June 06, 2018, 04:47:21 pm
content: Quote from: ataradov on June 06, 2018, 04:43:53 pmLol whaitomg ,you are right !!!!!AHAHAHAHAHAHAHAHAHAHAHA!!!!Holy crap,what a piece of pathetic scumbag i'm lolNow is all workingThanks you buddy.

author: Free_WiFi
author_rank: Regular Contributor
timestamp: June 06, 2018, 04:53:59 pm
content: This is happen,because i have an micro multimeter with the same plugs for Amper range,so for this reason i didn't really notice that on this new meter i need to change the position of probes.Lol

author: malagas_on_fire
author_rank: Frequent Contributor
timestamp: June 06, 2018, 05:23:33 pm
content: Quote from: Free_WiFi on June 06, 2018, 04:53:59 pmI have one of these too on my bag, and you can swap the leads and you will have the minus signal. It has a polyfuse inside, rearming fuse, by letting cool down if slightly overanged.This appends rarely with my uni-t 50b which has the mA socket where the A is ( on the most left side), plug amps and goodbye mA fuse... I've replaced 3 fuses in almost 8 years.
LQ-9101 LCR meter manual? - Page 1
Forum section: electronics / testgear

author: doobs
author_rank: Newbie
timestamp: June 11, 2018, 03:04:47 am
content: I bought one of these LCR meters off ebay, from china, but it came without a manual. The specs of many ebay vendors invariably say "see the user manual".At power up the LCD says:Copyright 2015, All rights reserved, LQ, Co., Std.I tried emailing the seller and sales@lq-china.com but had no response, and they do not list it on their website as a product.It comes with 4 buttons on the front.changes frequency 0, 100, 120, 1000, 10000Hzno ideachanges RMS voltage of test signal from 0.1, 0.3, 0.6Vchanges between 4 display modesI was wondering if maybe the second button was some kind of test lead compensation/calibration/zero function, but it doesn't seem to change much at all.In one mode it displays resistance and phase angle. Having never used one before, is the resistance likely to be just the real part of the complex impedance, or would it be the magnitude, sqrt(Re^2+Im^2)?Thanks

author: WhichEnt2
author_rank: Regular Contributor
timestamp: June 11, 2018, 06:11:21 am
content: Chinese documentationhttps://pan.baidu.com/s/1gf6c1rX#list/path=%2F&parentPath=%2FI can't check it cause it require to install their client for downloading.Their thread on forum:http://www.crystalradio.cn/forum.php?mod=viewthread&tid=354429

author: doobs
author_rank: Newbie
timestamp: June 11, 2018, 07:23:53 am
content: Wow! Awesome!I was able to download a Chinese language version of the manual and run it through Google docs translate to get something useful!Thank you very much!(edit: cn-pdf -> google doc -> MS docx -> en-pdf attached - functional but rough)
HP16533A logic analyzer scope card upgrade to 16534A - Page 1
Forum section: electronics / testgear

author: texaspyro
author_rank: Super Contributor
timestamp: March 29, 2018, 03:29:04 am
content: This info was originally published in the HP logic analyzer memory upgrade thread, but to make it easier for others to find, it deserves a thread of its own (now that it has been confirmed).Anyway, it's a simple swap of two resistors:On 16533A: R810=1004 R809=0 (top side, near the Actel chip)On 16534A: R810=0 R809=1004

author: Patrick.M
author_rank: Contributor
timestamp: April 02, 2018, 09:47:00 pm
content: May I ask if you verified that the sample rate & input bandwidth was actually doubled?It would be quite the deal for us muggels moving up in the world with simple resistor changes.

author: texaspyro
author_rank: Super Contributor
timestamp: April 02, 2018, 10:12:45 pm
content: Quote from: Patrick.M on April 02, 2018, 09:47:00 pmYes, I did some simple tests on the ones I mod'ed using a sig gen. At the time, I did not have a decent way of testing the rise time.If the mod does not work, it is very easy to un-mod.

author: Drewbie
author_rank: Contributor
timestamp: June 05, 2018, 08:58:12 am
content: My 16534A scope card is on the water via slow boat right now (along with a 16550A). Looking forward to it arriving so I can finally get to use my cardless 16702B.Nice to know a 16533A can be modded. Great work!I wonder if any of the other boards have similar simple upgrade options?

author: fisafisa
author_rank: Regular Contributor
timestamp: June 05, 2018, 08:40:09 pm
content: I have modded 4. They run together in a 16702b.A nice 8 channel scopeeven if a bit too slow.
My Rigol DSO thinks it's an MSO - Page 1
Forum section: electronics / testgear

author: JohnnyMalaria
author_rank: Super Contributor
timestamp: June 05, 2018, 08:57:56 pm
content: On start-up, my DS1104Z briefly thinks it might be the MSO equivalent but soon realizes otherwise. Two extra lights common behind the front panel where the MSO has buttons. Interesting. I wonder if I can hack it with a drill...

author: Daruosha
author_rank: Regular Contributor
timestamp: June 05, 2018, 09:14:16 pm
content: No, it doesn't think it's an MSO. The sequential led lightings are part of the POST and all 1000z models are doing the same.
HP 166X Logic Analyser HDD upgrade - Page 1
Forum section: electronics / testgear

author: Drewbie
author_rank: Contributor
timestamp: June 05, 2018, 09:30:31 am
content: Hi,My 1660E arrived with a HDD that appears to have had a head crash. I bought it understanding it had a problem.The bad news is that a number of CF card -> 44 pin IDE adapter boards I tried failed to work with it.The good news is that the following SD card -> 44 pin IDE adapter board works a treat...https://www.aliexpress.com/item/T-Secure-Digital-SD-SDHC-SDXC-MMC-Memory-Card-to-IDE-2-5-2-5-Inch/2055395286.htmlSo for a NZ$13 outlay plus an old 1Gb SD card from the used pile (and a format of the SD card once plugged into the logic analyser), I have a nice quiet 1Gb HDD in my 1660E.Only downside is the adapter board has no mounting holes on it. So I'll have to find a plastic case (maybe an old backup tape storage case will fit) so that I can glue that down to top of the PSU with just the ribbon cable coming out.
HP 5386A I/O error - Page 1
Forum section: electronics / testgear

author: Bjw
author_rank: Newbie
timestamp: June 05, 2018, 12:43:27 am
content: Hey guys,New to the forum. I'm considering purchasing an HP 5386A but it gets an I/O Error at self test. The A5 board doesn't seem to be too complex but I have zero experience with HP test gear and HPIB. I was also looking at an HP 5385A that passes the self test but I would prefer the 3GHz high end of the 5386A. Looking for any comments on the I/O error and whether this is a rabbit hole I should avoid. Both units have the ovenized oscillator (Opt 004). I read somewhere that the 5386A is a far superior unit than the 5385A but the comment lacked any specifics as to why.I'm a Ham Radio guy who has recently been re-acquiring some test equipment after many years of not servicing anything....I just miss the smell of smoke !!Thanks,Bjw
Klein Tools MM700 - Page 1
Forum section: electronics / testgear

author: mrrstrat
author_rank: Newbie
timestamp: June 04, 2018, 12:13:17 pm
content: I have a small fleet of Fluke meters but needed something to have around the house - I could not pass up a MM700 for $70 new.Its true RMS and has LowZ - accuracy appears to be good.Anyone know how they compare to a Fluke series in accuracy - and are they capable of calibration? I cannot find too much on this meter.I assume its from China and not USA for $70.00.I primarily do engineering and electronics stuff and from what I tell from the literature it appears this will work OK - enough that I can validate with my Flukes when what I am doing is really important to be right.
HP8714ET question - Page 1
Forum section: electronics / testgear

author: KrudyZ
author_rank: Frequent Contributor
timestamp: June 04, 2018, 04:39:47 am
content: The HP 8714ET has two measurement channels, which can be set to a variety of modes.When set to reflection I would expect the data to come from the reflection port while transmission plots would come from the transmission port.I would have expected that the measurement channels simply compute the plots from the relevant data.To my surprise when I set both channels to reflection and have them both display a Smith chart with identical settings I get quite different plots.Does anyone know what is going on?

author: KrudyZ
author_rank: Frequent Contributor
timestamp: June 04, 2018, 05:13:01 am
content: Sorry to answer my own question, but it seems that the instrument maintains separate calibrations for each measurement channel.This is a bit odd, since in the above setup there is only one actual measurement and only one data source. One display channel was calculated using a custom calibration and the other used the default calibration (the little C is missing on that one).Maybe this could be useful in some situations, but I would think that the calibration should be tied to the detectors / paths and not the computation channel.Furthermore, I have not found a way to copy the calibration data from one measurement channel to the other, which, if not possible, would be quite annoying since then the same calibration would need to be done twice.Maybe the software was really written for the 8714ES which has the S-parameter test set and would need the second calibration for S12 and S22.Of course, I wouldn't want to display the reflection data on both channels at the same time, but is sure would be nice to chose the display channel freely and have the same calibration data set apply to either one.
Power Design 2001a, Ripple and Accuracy - Page 1
Forum section: electronics / testgear

author: rwgast_lowlevellogicdesin
author_rank: Frequent Contributor
timestamp: June 03, 2018, 07:56:37 pm
content: I have been rebuilding a PD2001A, I just rebuilt the heater, and then the reference board with new caps and low noise transistors. Ive also replace 90% of the caps on the amplifier and AC input section. The supply is working very well but I have a few questions for anyone with one of these supply's about its noise an precision.First of all the PSU puts out a very nice signal most of the time, I have measured it with a siglent DSO, and an old HP scope with 100uV resolution and differential inputs. I seem to be in the .800uV to 1.5mV range when it comes to ripple, loaded and unloaded. When I set the current regulation everything is fine, but if the load attached to the PSU exceeds the current limit the ripple gets much worse. It jumps from 800uV to about 8-10mV with about a 120hz sine wave pattern. Is this common, what is the best way to resolve it?Second the accuracy and calibration is dead on perfect (for the most part) from what I can tell by comparing it to a dmm check and with a few 20,000ct meters. The only accuracy problem I have is with the volts selector. Every time I add a volt it adds 1V plus a few mV, here is what my readings are for each of the 10 voltage selections0.0001.0002.0013.0024.0025.0036.0047.00 can't measure mV past 7V with DMM8.019.01So as you can see the mV roll up with the voltage selection, so im guessing whatever is going on is needs more than just trimming one of the resistors. Should I attempt to add a high value trim pot in parallel with each resistor on the voltage knob?

author: dacman
author_rank: Frequent Contributor
timestamp: June 03, 2018, 08:47:20 pm
content: If the 2001A accuracy is +/- (0.1% + 1 mV) then the meter does not have the precision (nor accuracy) for the check.

author: David Hess
author_rank: Super Contributor
timestamp: June 03, 2018, 11:08:42 pm
content: I do not have a manual for the 2001A but if it is like the 2020, then the current limit is a Vbe design and more for safety than precision.
Opinions on Digimess UZ2400 universal counter - Page 1
Forum section: electronics / testgear

author: jusanother
author_rank: Contributor
timestamp: June 03, 2018, 01:49:16 pm
content: I stumbled uponthis on eBayand wondered if anyone had some experience with the unit ?I had considered the VC3165 but reviews seem mixed. Initially I am wanting to use it to check for frequency drift on analouge TV transmitters on the 1.2Ghz and 2.4Ghz bands. So maybe something like theSurecom SF103is more suited ?
1153A Diff Probe - any mods for 3000 series ? - Page 1
Forum section: electronics / testgear

author: EE-digger
author_rank: Frequent Contributor
timestamp: June 02, 2018, 02:11:20 am
content: Has anyone modified an 1153A diff probe to allow recognition by the 3000 series?

author: Neganur
author_rank: Unknown
timestamp: June 02, 2018, 06:53:16 pm
content: Quoting Keysight support: “The 1153A probe requires the VProg input to be +-6Volts. The newer scopes Qrex, Z,S and V series all have this VProg output fixed to +- 5 volts and not programmable.”So, give external 6V and modify the ID resistor to something generic (look for the autoprobe patent) or preferably, make it so you can swap the ID resistor from outside, e.g. by adding a socket for a TH resistor ) so you can control the probe head attention according to your attenuators choice. The attenuation factor can ofc also just be set manually in the probe menu. It’s just a display issue.

author: EE-digger
author_rank: Frequent Contributor
timestamp: June 03, 2018, 12:56:41 am
content: Thank you. That's the information I was looking for.
HP 54615B Startup? - Page 1
Forum section: electronics / testgear

author: TheAdmiralty
author_rank: Contributor
timestamp: June 05, 2018, 04:05:59 pm
content: Morning everyone! Quick question. I'm in the market for a oscilloscope with >=500MHz bandwidth for a few high(er) speed FPGA projects... would rather not spend $4,0000 on something new and so I'm looking at older models. I see a decent deal on an HP 54615B (500MHz, 1GS/s) being sold as-is, but I've got absolutely zero experience with these older HP digitizing o'scopes... The only picture I see is of the splash screen with "No module installed" indicated at the bottom.Now, I'm sure someone who's used these can answer this pretty quickly, but is this just a status message at boot, or is this thing going to show up without an RF front end (or some other mission critical component)? Maybe a stupid question, but I frankly don't know squat about most scopes other than the relatively new Agilents.Thanks!

author: elecman14
author_rank: Unknown
timestamp: June 05, 2018, 05:04:20 pm
content: The no modules installed refers to plugin modules that attach to the back of the scope. From the marketing literature "Optional expansion modules for FFT, waveform storage, and remote control".

author: TheAdmiralty
author_rank: Contributor
timestamp: June 05, 2018, 05:14:26 pm
content: That would make sense... I actually just went down during lunch to ask our inventory roomand we had an original manual for the 54616B in the office and it looks like you're right.Now it's down to this or a LeCroy 9354TM. Old scopes, but plenty for my purposes.