hybridfree/eevblog-posts huggingface dataset:
Gould user/service manual links, still looking for a service manual for DSO500 - Page 1
Forum section: electronics / testgear

author: PioB
author_rank: Regular Contributor
timestamp: August 07, 2014, 06:40:15 am
content: Hi all,in my quest of locating manuals for my gould DSO500 i have been partly successful. I managed to locate a user manual for it.I am still looking for a service manual/schematics tho, I'd be grateful if someone has one and could get me a copy.Here are a few links for this and other gould oscilloscopes I came across in my search, maybe they will be useful to someone.Post on mikrocontroller.net where someone uploaded a user manual for the Gould DSO 500:http://www.mikrocontroller.net/topic/185152#3340556Thank you very much, scradster!In his post you can also find also manuals and software for some gould classic oscilloscopes:QuoteAlso, on ko4bb.com there's a few manuals for gould oscilloscopes including a service manual for the 400 series:http://www.ko4bb.com/manuals/index.php?dir=09%29_Misc_Test_Equipment/Gouldhttp://ko4bb.com/Manuals/09)_Misc_Test_Equipment/Gould/Gould_DSO400.pdfHere:http://www.eserviceinfo.com/equipment_mfg/Gould_35.htmlare manuals (also some service) for OS300, 400 series, 1602/1604Still, if someone knows of a DSO500 service manual/schematics, please let me know.I hope that is of help to someone.

author: tautech
author_rank: Super Contributor
timestamp: August 07, 2014, 07:07:32 am
content: You might like to have a look at the links here:https://www.eevblog.com/forum/repair/repair-documents-and-links-sticky-me-please-mods/Please add any links you think may be of use.

author: PioB
author_rank: Regular Contributor
timestamp: August 07, 2014, 12:56:52 pm
content: Hi Tautech,thank you very much for the links; I went through them, but unfortunately there was no reference to the Gould DSO500 anywhere. So if someone has a service manual/schematics for it, I'd still be grateful for a note.Pio
Does the new Fluke 88 V/A have change alert - Page 1
Forum section: electronics / testgear

author: sleeper22
author_rank: Newbie
timestamp: August 06, 2014, 03:04:54 pm
content: Hello! I am new and this is my first post so be gentle.I have an old Fluke 88 and the most important feature to me is the change alert feature which detects input signal changes. I usually have my head under a car dash and I can't see my meter so my meter beeps whenever I touch voltage or if voltage drops. I purchased a brand new Fluke 88 V/A automotive kit just because I thought it had the change alert feature. Unfortunately, I have not been able to find the change alert feature, if there is even one to be found. I have called Fluke twice now with no luck and the last person I spoke to was extremely rude so I do not want to call them back. Does anyone know if the new Fluke 88 V/A has the change alert feature or does any other Fluke have this feature? Thanks in advance!

author: TopLoser
author_rank: Unknown
timestamp: August 06, 2014, 03:16:09 pm
content: If you turn MIN/MAX on then it will beep when a new min or max is detected. Not each time the reading changes though...

author: retiredcaps
author_rank: Super Contributor
timestamp: August 06, 2014, 04:23:39 pm
content: It doesn't appear that the 88V has the equivalent change alert like the original 88. If you need to see the reading, investigate the Fluke 233 (and possibly return your 88v?). Dave's review ...If you want another original Fluke 88, ebay is another option.

author: sleeper22
author_rank: Newbie
timestamp: August 06, 2014, 05:57:10 pm
content: I will try the min/max feature and see if that helps. I actually need the audible tone/beep more than I need to read the LCD so the 223 won't work (although, it is nice). Plus, I can't return my meter because I have owned it for about 3 months, one month passed the return date... Thank you for the ideas though!

author: retiredcaps
author_rank: Super Contributor
timestamp: August 07, 2014, 06:00:38 am
content: I have a Fluke 88, but have never tried the change alert feature. I will have to find some time to try it out.

author: sleeper22
author_rank: Newbie
timestamp: August 07, 2014, 12:24:01 pm
content: Quote from: retiredcaps on August 07, 2014, 06:00:38 amThe feature is great and a must have if you can't see the meter while probing around. I couldn't find another brand of meter to do this and I was told it is Fluke specific.
Mastech HY3005F-3 Series/Parallel Switches imply non-floating supply? - Page 1
Forum section: electronics / testgear

author: tzcczt
author_rank: Contributor
timestamp: August 06, 2014, 12:53:18 pm
content: TheHY3005F-3has two switches for configuring it's two supplies in independent, series or parallel mode. Does the existence of these switches imply that the two outputs are not truly independent/floating?There is also a translated warning in the manual "In this series operation, must not connect the negative output terminal to the ground output terminal whether it is of master or of slave unit, because the connection will bring short-circuit of the subsidiary circuit".I don't have a use case in mind, but wanted to know why one couldn't connect them in series with the center terminal connected to earth for an earth referenced positive & negative supply.

author: Circuitous
author_rank: Unknown
timestamp: August 06, 2014, 05:26:25 pm
content: I don't have this power supply, but when the switches are set to "Independent" the outputs should be isolated from each other.You can check:With the output turned offSet the switches to independentmeasure the resistance between the two negative connectionsSomeone else might have a better recommendation?

author: tzcczt
author_rank: Contributor
timestamp: August 06, 2014, 09:55:31 pm
content: No continuity between the negative terminals when in independent mode. There is continuity in both parallel and series mode. I just received the schematic (attached) from Mastech and I'm looking it over now.

author: saturation
author_rank: Super Contributor
timestamp: August 07, 2014, 01:48:11 pm
content: I do not own this unit. At a glance, those switches appear to save the owner from using jumpers to make a series or parallel connection between CH1 and CH2. In parallel, be aware of the rated current of the switch [ in theory, the device can deliver 10A] and in series the Vdc output isolation breakdown voltage; in series its unlikely to be an issue since the maximum series Vdc this devices outputs is <= 60-65Vdc.For either mode to work, both CH must be isolated from each other and you do not earth any terminals.Some problems: if you earth the neg terminal of both CH, you will short out CH1. In parallel mode, it should not cause DC problems, but you have a shock hazard in higher Vdc as earth ground is chassis ground of many appliances as well as DSOs: if you touched the pos terminal the circuit completes using earth if you touch anything earthed. Earthing the neg terminal would also allow a path to receive RFI, and other common mode noise sources, into your power supply line.You cannot use earth as a reference for a neg and pos supply because it will not form a full circuit. You can put the PSU in series mode and use CH1 + as ground and split the supply.
Vector VID WP775 Power Supply 30VDC 5A - Manual and Schematics - Page 1
Forum section: electronics / testgear

author: Zucca
author_rank: Unknown
timestamp: August 07, 2014, 12:20:34 pm
content: It looks like a nice power supply for beginner and not. Made in 1998. Anyway I came across the manual with schematics. There is nothing on the WWW about those puppies, well.... until today.Hope to help someone to repair it.
Hameg HMS3010 Spectrum Analyzer Stupid Question - Page 1
Forum section: electronics / testgear

author: SNGLinks
author_rank: Regular Contributor
timestamp: August 06, 2014, 10:23:23 am
content: I have a HMS3010 3GHz spectrum analyzer.Been using it for quite some time. Here is a screen shot of the spectrum of a digital TV transmitter of mine.Now I've changed some settings and cannot get back to the same view.This is what I get. (No device connected):How do I get rid of the grass? The RBW, Video BW are the same and the Trace Mode is C/W (Clear/Write)This must be a simple setting but I cannot find it.

author: cyr
author_rank: Frequent Contributor
timestamp: August 06, 2014, 11:24:22 am
content: Detector type?No idea where that setting is on your SA though, sorry.

author: SNGLinks
author_rank: Regular Contributor
timestamp: August 06, 2014, 12:06:12 pm
content: I think you've cracked it! It was on AutoPeak, changed it to Max Peak and that looked much better!I knew it was a simple setting - I just couldn't find it. I blame my age - only been using SAs since 1982.Thanks very much.

author: HiTech
author_rank: Regular Contributor
timestamp: August 06, 2014, 08:22:28 pm
content: From the looks of that second photo, I'd guess you don't have a center frequency specified --- therefore it's "drifting" or just measuring open-like. Does the Hameg have an auto-setup feature?

author: PA0PBZ
author_rank: Super Contributor
timestamp: August 06, 2014, 08:44:27 pm
content: Quote from: HiTech on August 06, 2014, 08:22:28 pmNo, it's either center-span or start-stop, both equally specifying the range.
HP 8593A Comb Filter - no output... - Page 1
Forum section: electronics / testgear

author: darkroom
author_rank: Contributor
timestamp: August 07, 2014, 01:14:16 am
content: Hi,I have an HP 8593A. The comb filter output is nil...and I have enabled it in the menus. I don't recall ever actually using this output in the 14 years I've had this unit, so it may have been not working since I bought the unit.The comb filter looks easy enough to bench test...but it looks like a PITA to get out/in. Anything I can do before pulling this out and bench testing it? I did check the output before the step recovery diode, and it's nil there too. I also made sure it was turned on...Thank you for any help!Austin

author: alex.forencich
author_rank: Frequent Contributor
timestamp: August 07, 2014, 02:00:10 am
content: Did you check to make sure the 100 MHz osc is getting power when it's turned on? If it has power and no output, then you're porobably just going to have to pull it out and open it up. The easiest way to get at the RF section is to take the front panel off and then pull the RF section out the front.

author: darkroom
author_rank: Contributor
timestamp: August 07, 2014, 02:19:45 am
content: Hi Alex,I just traced the wires and found that the wires run to the top of the analog board, and therefore are easy enough to scope out. That'll make things quite a bit easier to test.Best Regards,Austin
OWON SDS7102 data capture tool - Page 1
Forum section: electronics / testgear

author: Buendía
author_rank: Newbie
timestamp: November 09, 2013, 06:11:20 pm
content: I've written a tool to get data from my OWON SDS7102V oscilloscope through the LAN interface, and I am sharing it hoping it may be useful to someone else. It is a command line python tool, tested with python 2.7 and 3.3, both on linux and windows (although it should also work on other platforms as well, since it is pure python). It is able to retrieve screenshots and sample data. I still have to document the API in case someone wants to directly use the python code and not the tool. Also, there might be other issues since this is the first public release.I found some c code online for owon oscilloscopes but it wasn't working with my model. Thanks to God, I've been able to partially reverse engineer the protocol used with the help of that old code. I do not know whether it will work on other SDS7102 models, since the protocol documentation is not public (AFAIK) and it may change with different firmwares, and I have not been able to fully reverse engineer it. It might work also on other OWON oscilloscopes, but I am not able to test that.The tool can be downloaded here:http://spika.net/py/owontool/I have the oscilloscope connected to a switch and not directly to the PC. The ip, the port and the gateway have to be properly configured in the oscilloscope (it is in the utility menu). I've left the port to the default, but I've changed the ip and gateway to suit my LAN.Hope this is useful.

author: pfm
author_rank: Regular Contributor
timestamp: August 06, 2014, 08:26:18 pm
content: so has anyone used this tool ? how is it ?Any other data capture tool out there that can extract the actual sampling data from the oscilloscope ?
Alternative to RF Field probe  - Page 1
Forum section: electronics / testgear

author: SANJAY
author_rank: Newbie
timestamp: August 04, 2014, 10:33:19 am
content: We are using RF field probes for calibration of GTEM & SAC. Before proceeding for compliance testing, we need to test (pre-check) the electric field inside GTEM/SAC with help of Field probe. The field probe being delicate & used almost daily, have many times lead to various faults & wear and tear in the probe. Are there other alternatives for taking regular pre-check?

author: tautech
author_rank: Super Contributor
timestamp: August 05, 2014, 08:38:10 pm
content: A DIY probe can be made with a loop of Coax cable.Google: RF probe from coax loopSome discussion and ideas here:https://www.eevblog.com/forum/projects/diy-magentic-field-probes/msg209554/#msg209554Siglent do a field probe SRF503 that comes in a nice case.http://www.siglent.com/en/product/detail2.aspx?id=100000002327375&nodecode=119008002Check accessories.EMI Probe manual:http://www.siglent.com/en/server/download.aspx?nodecode=119004002001

author: Precipice
author_rank: Frequent Contributor
timestamp: August 05, 2014, 08:49:23 pm
content: If you're feeling keen, grab a copy ofDesign_and_Calibration_of_the_NBS_Isotropic_Electric_field_monitor_EFM(all over the web)and build one?Only specified out to 1GHz, how high do you need?I fear that the real answer is to be more gentle with your existing probe, or buy a new one! I can't really imagine you can claim compliance without checking your field strength...
Metex ms-1208 - Page 1
Forum section: electronics / testgear

author: R_G_B_
author_rank: Frequent Contributor
timestamp: August 04, 2014, 07:35:41 pm
content: I am looking for a English user manual in pdf format and software For the Metex ms-1208 DSO.Can anyone help with this?thanks

author: macboy
author_rank: Super Contributor
timestamp: August 05, 2014, 04:03:16 pm
content: Are you referring to MS-1280? I don't see any reference to MS-1208 anywhere.This should do, but the pages are ordered strangely. It looks like it's intended to be printed, then folded and stapled down the middle to form a booklet. Trying to read on-screen will be frustrating.http://www2.produktinfo.conrad.com/datenblaetter/100000-124999/122169-an-01-ml-GRAPHISCHES_MULTIMETER_MS_1280_de_en.pdfElektro-tanya has a service manual:http://elektrotanya.com/metex_ms-1280_multimeter.pdf/download.htmlApparently Tenma made a similar unit. You might try the following software although I have no idea if it will work.http://www.element14.com/community/servlet/JiveServlet/download/42357-2-109297/Tenma%2072-8400.ziporhttp://www.mcmelectronics.com/content/ProductData/downloads/72-8400-Software.zip

author: R_G_B_
author_rank: Frequent Contributor
timestamp: August 05, 2014, 07:57:00 pm
content: Thanks for your reply. Yes its the 1280 I can't seem to get to grips with the scope function a very difficult scope to use.Made in Korea. The built in function generator is a neat feature although low frequency still handy to have for testing out circuits. The problem I have with the scope is triggering. Its OK with repetive signals such as a square wave sine etc. Thow in a complex wave such as a fuel injector pulse and it can not capture it. I take it the PLL wave monitor function is just for sine waves?
12864 Transistor Checkers vs. Atlas DCA 55 - Page 1
Forum section: electronics / testgear

author: Electro Fan
author_rank: Super Contributor
timestamp: August 05, 2014, 02:55:13 am
content: Anyone have any thoughts on how the various 12864 transistor checkers compare to the Atlas DCA 55 in terms of functionality and accuracy?http://www.ebay.com/itm/New-12864-LCD-Transistor-Tester-Capacitance-ESR-Meter-Diode-Triode-MOS-NPN-LCR-/281282973310?pt=LH_DefaultDomain_0&hash=item417dc58e7e

author: TheRuler8510
author_rank: Regular Contributor
timestamp: August 05, 2014, 03:17:50 am
content: I'm an Atlas fan. It does some amazing stuff, but it is not perfect.I'd say get one of each, since no single tool does everything the same.Regards,
About to buy maybe a DS1074z scope, need info on hacking procedure - Page 1
Forum section: electronics / testgear

author: asgard20032
author_rank: Regular Contributor
timestamp: August 04, 2014, 03:41:40 pm
content: Hi, whenever i do a search for rigol hack procedure, I alway get on page talking about the newer serie ds2000a.How is the ds1000z hacking procedure? Do I need custom firmware and re flashing... usb connectivity...Thanks for explaining me or guiding me to the right place.EDIT: Moderator, remove this thread, resolved.
HP 3488A cards - Page 1
Forum section: electronics / testgear

author: davorin
author_rank: Unknown
timestamp: August 02, 2014, 10:34:47 pm
content: Evenin' (o;I see that the HP 3488A switch controller is quite cheap..sometimes even with built-in cards...But from the pictures of the line cards I saw I see no connectors on the back....just some 3 square holes...Do they have inside some screw terminals?

author: Dr. Frank
author_rank: Super Contributor
timestamp: August 03, 2014, 05:51:51 am
content: Most of the cards have a separate connector block.cards w/o that are quite useless, unless you somehow solder your channels directly onto the scanner card PCBFrank

author: davorin
author_rank: Unknown
timestamp: August 03, 2014, 09:20:50 pm
content: Yeah...just saw on ebay some of the cards listed....even a guy which sells them as module...but on the picture only the connector block is seen...And I assume the connector is not a common connector type from AMP, Molex or the like...What puzzles me is the fact that the 3488A recognizes the installed cards...but in the manual the schematic of the breadboard card doesn't show any circuits which could identify itself..

author: Dr. Frank
author_rank: Super Contributor
timestamp: August 04, 2014, 06:42:16 am
content: Quote from: davorin on August 03, 2014, 09:20:50 pmWell, I did not investigate deeply about the connector suppliers, yet.. but they might be the usual ones, maybe custom specific.And mostly each card has a different connector type.In the schematic there are 4 to 5 data lines on the data bus which identify the card type, which is read back from the controller. Search for the label 'Card Type Buffer' in the schematics..There are also some younger card types, which are not recognized, but a modification of the PCB / firmware made that possible also.Btw.: Everything is covered and described in the manual 3488-90012.pdf, also search for 3499-90017.pdf.Frank

author: free_electron
author_rank: Super Contributor
timestamp: August 04, 2014, 07:43:37 am
content: manual numbers are incorrect. you won't find anything.here are correct links :http://cp.literature.agilent.com/litweb/pdf/03488-90012.pdfhttp://cp.literature.agilent.com/litweb/pdf/03499-90017.pdfhttp://cp.literature.agilent.com/litweb/pdf/03499-90002.pdf

author: davorin
author_rank: Unknown
timestamp: August 04, 2014, 10:14:57 am
content: Bought me now a 3488A with a pre-installed 44474A line-card....Soon to find out how feasible it is to do own cards for it...Especially I want to have some audio/video switch matrix to feed my Fluke 606A/ANwith different type signals for AM/FM modulation and testing radio/tv receivers...TCP/IP power switches I already have....though those could be modified to GPIB as well (o;
Rigol 2014 Catalog - Page 1
Forum section: electronics / testgear

author: Electro Fan
author_rank: Super Contributor
timestamp: August 02, 2014, 06:29:12 pm
content: http://beyondmeasure.rigoltech.com/acton/attachment/1579/f-0170/0/-/-/-/-/file.pdfHappened to see this, has some older products and not completely up to date but nice source of overall Rigol info.

author: Mark_O
author_rank: Frequent Contributor
timestamp: August 03, 2014, 06:35:49 am
content: Thanks, EF. Always nice to have information resources.That mostly looks like a collection of their stock Datasheets, but having a bunch in one spot is still handy.
Hamfest bargain - Page 1
Forum section: electronics / testgear

author: vk6zgo
author_rank: Super Contributor
timestamp: August 04, 2014, 07:48:14 am
content: I bought one of these at the Perth Hamfest for $A40 yesterday!http://www.ebay.com.au/itm/Leader-LCR-740-LCR-Bridge-/111257472862$40-$50 seems like a fair price for a bit of vintage equipment to me,but Googling,a lot of them were around $200.The cheapest was where someone paid US $86!PS: OOPs! wrong category-----can someone move it to Test Equipment,please?

author: GreyWoolfe
author_rank: Unknown
timestamp: August 04, 2014, 12:14:33 pm
content: Great bargain!

author: SeanB
author_rank: Super Contributor
timestamp: August 04, 2014, 04:56:40 pm
content: All I got was a Sinclair Z12, NIB. Wonder if it still works, as it is older than me, and was made with rejects from Newmarket Transistor's production line.

author: TerraHertz
author_rank: Super Contributor
timestamp: August 05, 2014, 03:50:06 am
content: Quote from: SeanB on August 04, 2014, 04:56:40 pmWait, what? You're in Perth?

author: SeanB
author_rank: Super Contributor
timestamp: August 05, 2014, 04:57:22 am
content: No, I went to my ham meeting in Durban South Africa on Saturday as well......That and a pair of butterfly capacitors and some elbows for pl259 is pretty much all I bought.

author: vk6zgo
author_rank: Super Contributor
timestamp: August 05, 2014, 06:08:32 am
content: Yeah,I was pretty much going home with nothing till I spotted the LCR bridge.(I feel guilty seeing the eBay prices,as I bargained the seller down from $50!)I don't know if Hamfests aren't what they were,or if I'm getting too long in the tooth!
Siglent SDG1025 - Sync pulse for sweep - Page 1
Forum section: electronics / testgear

author: Slappy_g
author_rank: Regular Contributor
timestamp: August 01, 2014, 09:42:35 pm
content: I was watching Dave's video on faking a Bode plot using a siggen set to do a frequency sweep.I went to replicate this on my new setup (Rigol MSO2000A series scope and Siglent 1025 siggen). It appears that the sync pulse when set to sweep is not neatly aligned to the sweep like Dave shows in his video (half low, half high). It appears that it sends a short (several microsecond high pulse at the start of the sweep only), which makes it challenging to use for reliable triggering.I am using a sweep range of 10Hz to 100kHz over 5 seconds at 4V P-P. Am I missing something here, or do I need to return my Siglent and prepare to pay for a better unit? (please tell me it's the former, as getting wife signoff on more hobby spending may lead to a knife in my back)

author: rf-loop
author_rank: Super Contributor
timestamp: August 02, 2014, 05:18:42 am
content: I do not know if this can help anything.http://siglent.freeforums.org/sdg1000-syncout-secrets-and-freaks-also-some-trig-out-t28.htmlThis work documentation is still "under work". But there is something.QuoteReally?If oscilloscope have any problem for reliable trig to this kind of signal then oscilloscope is broken ... or totally wrong trigger settings (and I suspect this last one).

author: Slappy_g
author_rank: Regular Contributor
timestamp: August 04, 2014, 09:58:49 pm
content: Quote from: rf-loop on August 02, 2014, 05:18:42 amThanks for the link - that was very interesting. As to your second point - perhaps I should have phrased it better. I noticed that the short pulse was not 100% aligned with the start of the sweep and seemed to vary slightly left/right, which created a repeatability problem. That's the main cause of concern.

author: Hootch
author_rank: Contributor
timestamp: August 07, 2014, 06:38:59 pm
content: Hi!I had the same problem, not with a digital scope but with an analog one. After reading the manual for a while with no usable results, I just fiddled with the settings. So it came up, that in my configuration the Bode-diagram-plotting works fine with much a shorter sweep-time setting, about 100ms. Of course with the equivalent setting on the scope. The rest of the setup was just as in Dave's video (although I was a bit foolish: I forgot the filter-cap first)Just give it a try, I'm sure, it'll work!Greetings!
HIOKI DT4211/4212 Multimeter Quality - Page 1
Forum section: electronics / testgear

author: chawchip
author_rank: Newbie
timestamp: July 31, 2014, 02:56:56 am
content: Hello,HIOKI released a couple of new "budget" meters last year, the DT4211 and DT4212. I have seen anand was quite impressed with the build quality and speed of this meter, but it is lacking a milliamp range. The new DT4211 and the DT4212 have a proper milliamp range, but I am wondering if the same level of quality is present in the new DT4211 and DT4212. Specifically do they contain genuine HIOKI and TI chipsets (like the DT4252), and are they manufactured in Japan.Thanks!

author: retiredcaps
author_rank: Super Contributor
timestamp: July 31, 2014, 05:12:43 am
content: My guess from reading the Hioki DT4211/4212 specs of 3 updates/sec, double AA battery, 4000 count with 0.5% DCV accuracy that it is based on some off the shelf IC like a Fortune Semiconductor FS9721.

author: retiredcaps
author_rank: Super Contributor
timestamp: July 31, 2014, 05:24:41 am
content: This auctionhttp://www.ebay.com/itm/231179359943shows a picture of the back with the rubber holster off. Unfortunately, I can't tell from the low resolution picture where the meter was made.Perhaps someone with better eyes or knows how to use a tool to sharpen the image?edit: I think I see a T and 6 letters total, so my guess Made in Taiwan.edit2: Hmm, similaritieshttp://www.deree.com.tw/proimages/rimages/Digital-Multimeter-DE-240-241-242-243.pdf

author: chawchip
author_rank: Newbie
timestamp: July 31, 2014, 02:36:17 pm
content: I knew it was too good to be true. I am still interested to see inside though.

author: PedroDaGr8
author_rank: Super Contributor
timestamp: July 31, 2014, 03:38:06 pm
content: Quote from: chawchip on July 31, 2014, 02:36:17 pmAs far as manufacturers go, the Der EE multimeters are actually pretty decent. Not quite Brymen level but close and definitely not Chinese quality.

author: wraper
author_rank: Unknown
timestamp: July 31, 2014, 04:29:17 pm
content: Quote from: retiredcaps on July 31, 2014, 05:24:41 amDial positions are differentEdit:Button functions are also differentEdit 2:Like DE-243 except button functions are swapped
AC Power meter - Page 1
Forum section: electronics / testgear

author: eetechTom
author_rank: Contributor
timestamp: July 29, 2014, 05:34:53 pm
content: Greetings! Time to start my first topic on this forum.I am looking to purchase 4 or 5 AC Power meters for an undergrad machines lab. The minimum requirements are 220v single phase, 20A maximum. A scale/display for voltage and watts are also minimum requirements. The existing experiment these are used in connects to a 5A CT. We only require single phase measurements currently but am thinking of ordering something with 3 phase capability in case it is needed in the future. I am hoping to stay under $500 each, and can add I/O connectors and enclosure myself if necessary. The instrument itself will be powered by 120 vac ideally.P.S. Need to order from a US distributor.I'm hoping to avoid solitcing quotes on instruments that are above budget so any general advice would be greatly appreciated.

author: eetechTom
author_rank: Contributor
timestamp: July 29, 2014, 07:18:32 pm
content: I see MicroDAQ might have a solution with their Acuvim-I series. Under $300, investigating that as a start.I have no experience with that company however..

author: mjkuwp
author_rank: Unknown
timestamp: July 30, 2014, 01:16:50 pm
content: What else have you come across?have you seen this site?http://openenergymonitor.org/emon/maybe it is not good for finding products but there may be other resources there.Do you need logging of the data? what is the purpose of monitoring power?I am interested in this topic. I made my own meter but if there was something relatively low cost I would just buy them.

author: eetechTom
author_rank: Contributor
timestamp: July 31, 2014, 06:08:45 pm
content: We do not need data logging at this time, but may someday. The power meters we use now were a home brew and are really showing their age (20+). This will be used in a lab that teaches how to use current and potential transformers for measurements and demonstrates the function of an isolation transformer.
MSOX3054A LAN Setup - Page 1
Forum section: electronics / testgear

author: K1JOS
author_rank: Regular Contributor
timestamp: July 30, 2014, 01:05:02 pm
content: Has anyone gotten the 3000x or 2000x LAN to work on a direct laptop - scope connection without a network hub? I have made the two different types of cross-over cables but still get LAN failure on the scope. Any tips appreciated. The LAN adapter is new from Agilent. I have disabled the wireless on the laptop but neither laptop or scope see's each other for automatic config. Is manual config needed?j

author: PA0PBZ
author_rank: Super Contributor
timestamp: July 30, 2014, 02:09:47 pm
content: Quote from: K1JOS on July 30, 2014, 01:05:02 pmYou need to manually configure the LAN settings because you will not have a DHCP server running on either the laptop or the scope.So set one to 192.168.1.1, the other one to 192.168.1.2 and give them both 255.255.255.0 as netmask. Gateway can be left blank.After that try both cables again.

author: MarkL
author_rank: Unknown
timestamp: July 30, 2014, 04:04:12 pm
content: After you solve your cable problem, if you're running Linux you'll also need to start netbios NMB services.There's a bug in MSO v2.35, and possibly other versions, that insists on issuing a netbios name request back to the connecting host. If the host doesn't answer, the scope will sit there and retry 4 times for a nice 8 second delay on any SCPI command.And who says you'll never know it's running WIN-CE?

author: jstarr
author_rank: Regular Contributor
timestamp: July 30, 2014, 06:56:34 pm
content: If running Win7 make sure you use IP4 not IP6 to configure your PC. I have my 3000x working fine with either cross-over cable.HOWEVER, when I start my 3000x with my "options" USB stick, the LAN no longer connects even though the scope LAN address and netmask are the same as without the USB stick boot. I get the following error message on my laptop when I try to open a connection to the scope after I boot from USB stick:---------------Parse error in scriptMicrosoft VBScript runtime error: '800a01ad'Description: ActiveX component can't create object: 'infiniiVisionWebCom.ScopeInfo'In file: scopeInfo.aspOn line: 4--------------My 'options' USB stick in the 3000x seems to be running from the USB stick and I assume this is messing up the LAN config. Any ideas anyone?John

author: K1JOS
author_rank: Regular Contributor
timestamp: July 31, 2014, 01:59:35 am
content: Thanks to all. After configuring manually all works. John I found this in another thread that may help your problem:Quote
Fluke FC3000 "wireless wanker meter" - Page 1
Forum section: electronics / testgear

author: Eliminateur
author_rank: Regular Contributor
timestamp: July 30, 2014, 08:08:18 pm
content: I just got an interesting product email that would be interesting for Dave to reviewthe Fluke FC3000 wireless digital multimeter "smartphone connected" aka "the wanker meter"it has a ihpone or android app that reads the MM data, there's also a whole host of accesories(standalone or "networked") of the usual sort: AC clamps, DC shunts, temp probes, etc.there's also a IR to wireless converter for older non-wanker ready devices.oh and it's not compatible with the "older" CNX devices, those where propietary stuff, these ones are most likely wifiit's not terribly expensive either, the FC3000 i see it at 349US, that's a good value for a wifi-meter(haven't checked the specs to see how it fares against the 87-V)

author: mjkuwp
author_rank: Unknown
timestamp: July 31, 2014, 12:35:17 am
content: guess I will write the dissenting opinion : )I have the Agilent meters with wireless connection to smartphone. my opinion, this is not wanker at all.Surely not everyone has a use for this but for those who have data collection tasks this is an incredibly easy high quality datalogging solution for a small incremental cost above a tool you are already using. I have done data collections with as many as three meters together. In our office the competing solution would be to roll the labview cart including the laptop, the labview hardware of course and pulling out the appropriate software , etc. I can do this many times quicker just grabbing the meters.Just used it today in fact. When a data collection is complete a few taps and the file goes to dropbox. When I get back to my desk it is right there waiting.I have no idea how many engineers need this but I use it pretty frequently.Also had some ideas of logging things on the car while I drive but most everything of interest exists as digital data in the computer so there just has not been a need.if I sound excited. it is purely genuine.of course there are other people with absolutely no use for the logging.There is also a mobile app to view the meter on the smartphone. So far I have found little use for that but others may.I don't know much about the Fluke solution - just assume it is quite similar to the Agilent one.
And now for something completely different (o; - Page 1
Forum section: electronics / testgear

author: davorin
author_rank: Unknown
timestamp: July 29, 2014, 10:09:19 pm
content: I've just joined this forum recently and it has been a big, no, not big, huge help repairing my devices :-))For my instruments I used a self made Prologix clone, which works fine for most uses, as it is just pain, dumb serial communication...Some people suggested me to use the F82357 device from Beiming...which I just received this week...and after a few hickups I haveto admit it works so far nicely...despite the sample "ibterm" program, which looses characters constantly (o;I've been asked by Beiming to supply more programming examples for their Linux customers, as this is the fieldI'm using this adapter as well...and probaly many people are doing...I have already a bunch of GPIB instruments I bought cheap from ebay for my private lab...as it was always the dream to have some cool equipment at home since I was 16 (o;So this means my programming examples are limited to the devices I have, basically:HP 6632BHP 3456AHP 8904AFluke 6060A/ANLeCroy 9354ALLeCroy 9414So therefore I'm looking for sponsors for any sort of GPIB device which might be interesting to have a custom application written for it....might be even a broken device,For Windows support....I guess there are more applications available...and for OSX? Sad news is, that Agilent stopped the support for newer versions....but I hope to get more insights from Beiming to be able to have a new driver available...
RS232 command strings using a USB or wireless Keyboard ! - Page 1
Forum section: electronics / testgear

author: Fraser
author_rank: Super Contributor
timestamp: July 29, 2014, 07:38:33 pm
content: I have been hunting around for an easy way to send RS232 command strings to my thermal imaging cameras. I found some programmable keypads that can store command strings that are associated with a specific key-press. These come from Genovation but didn't meet my needs fully so I kept looking.Tonight I found the web site of Versalent:http://www.versalent.biz/wlkeyboard.htmThey sell an adapter that accepts USB wired and wireless keyboard key inputs and translates them into plain RS232 serial ascii or a command string of up to 10 characters per key. Its easy to program so you can basically set up the RS232 'word' that each keyboard key generates and the serial data configuration.So in my case, I can set the arrow keys to send the up, down, left and right joystick commands to my PM695 TIC. With a normal PC keyboard I can send every command that the FLIR PM series make available to the userFor the money I thought it worth a try so I have ordered one. A reasonable cost for such a niche product. They also do PS2 keyboard to RS232 serial adapters as well.
Used signal generator parts life span - Page 1
Forum section: electronics / testgear

author: AwArD_RzD
author_rank: Regular Contributor
timestamp: July 28, 2014, 01:31:18 am
content: In the next few month i will need a good signal generator, i saw many post in different forum where ppl was buying old discontinued Agilent ESG serie and they all had good review of this series, i started to check for the E4421B model and many seller posted the diagnostic menu where you can see the power cycle, power on and the attenuator cycle.I saw many unit with over 40k hour power on with very low attenuator cycle (in the range of 1000 to 3000) and many other unit with 15k-25k hour power on but with some 2 000 000 - 3 000 000 attenuator cycle, all around the same price. I understand the million cycle indicate these unit was on a test bench and can switch off an on the attenuator 2-3 time per minute (124 time/hour for one unit in example), but do i need to worry about this electronic part and the high cycle count ?? (the attenuator is not mechanical in these unit)

author: KJDS
author_rank: Super Contributor
timestamp: July 28, 2014, 06:53:48 am
content: I've not looked inside one in over a year, but I thought it was a mechanical attenuatorB.If it isn't then it isn't important. If it is then I'd be concerned about several million switching operations.

author: nctnico
author_rank: Super Contributor
timestamp: July 28, 2014, 07:13:25 am
content: My E4421B (still in restauration) has an electronic attenuator which doesn't wear out. The service manual could shine a light on which serial numbers have an electronic attenuator.If you get one of these generators be sure to put thermal paste under the end amplifier otherwise it may overheat.

author: cyr
author_rank: Frequent Contributor
timestamp: July 28, 2014, 09:20:19 am
content: My E4421B has 58k hours and 12.6M attenuator cycles on it, works perfectly.Only option UNB (higher output power) uses a mechanical attenuator.

author: AwArD_RzD
author_rank: Regular Contributor
timestamp: July 28, 2014, 01:06:32 pm
content: Thanks for the reply,@nctnicoWhere is this end amplifier located ?I tried to find the Service documentation, assembly and component manual but it's only available at purchase and it's 370$ CAN, anyone have it in PDF format ??

author: nctnico
author_rank: Super Contributor
timestamp: July 28, 2014, 11:52:10 pm
content: The service manual can be downloaded from HP. Don't expect schematics but the end amplifier can't be missed on the output board.

author: AwArD_RzD
author_rank: Regular Contributor
timestamp: July 29, 2014, 01:21:33 am
content: Quote from: nctnico on July 28, 2014, 11:52:10 pmdon't know why i missed it, it's the third link on google d'oh!! Thanks !
linux-gpib examples/utilities - Page 1
Forum section: electronics / testgear

author: davorin
author_rank: Unknown
timestamp: July 27, 2014, 09:05:26 pm
content: I just got finished installing and configuring linux-gpib on my small Intel NUC for my F82357 adapter...Apparently linux-gpib exists since a long, long time...but surprisingly there aren't many Linux applications available using this library...So do people all write their applications for themselves covering their own instrumentation needs?

author: MarkL
author_rank: Unknown
timestamp: July 27, 2014, 11:57:32 pm
content: I've written my own, mostly using the linux-gpib Perl library. I've also written a perl wrapper for my instruments so I can do queries from the shell:Code:$ pspq *idn?HEWLETT-PACKARD,E3631A,0,2.1-5.0-1.0$ dmmq # read value from 3478A+0.47033E+0Or, set things:Code:$ psp "APPL P6V, 3.3, 0.1" # set 6V output to 3.3V@100mA$ psp "OUTPUT ON"With this simple interface, most everything I need gets written in bash. Occasionally, I've written some projects directly in Perl or C if I needed faster acquisition or control.After getting the data, I usually use gnuplot for simple plotting, or octave for any signal analysis.I've been pretty happy with the "roll your own" approach. There's certainly no support for linux-gpib, or Linux in general, from any equipment manufacturer that I'm aware of.

author: davorin
author_rank: Unknown
timestamp: July 28, 2014, 10:12:06 pm
content: Started now with Python....and after some heavy reading and googeling around I came to this first program...It send the screendump command to my LeCory 9414 and reads the HPGL output and pipes it through hp2xx to convert the HPGL format to a PNG file:Code:#!/usr/bin/pythonimport sysfrom subprocess import Popen, PIPEimport errnoimport shlexhpgl = ""hp2xx = "/usr/bin/hp2xx -m png -c 12445611 -d 150 -q -f "cat = "/bin/cat"from Gpib import *file_name = sys.argvhp2xx += file_namehp2xx += ".png"p = Popen(shlex.split(hp2xx), shell=False, stdin=PIPE)bytes = 200inst = Gpib(0,15)inst.write("SCDP")p.stdin.write(inst.read(bytes))count = 0while inst.ibcnt() == bytes:print 'Bytes read: ',countp.stdin.write(inst.read(bytes))count += bytesprint '\nFinished dumping... 'print hp2xxp.stdin.close()p.wait()Especially the piping to another program was a nightmare to find out how it should be done correctly (o;Sample output:
Wanted:  HP 'High Bandwidth Oscilloscope Sampling Architectures' product note - Page 1
Forum section: electronics / testgear

author: Lukas
author_rank: Frequent Contributor
timestamp: July 28, 2014, 09:06:54 pm
content: Hi everyone,I'm looking for the 'High Bandwidth Oscilloscope Sampling Architectures' 5952-0163 product note. Google didn't come up with anythin useful. Any other ideas where to look? I hope that this article contains some recent (compared to the analog boat anchor stuff floating around) information on the architecture and design of sampling scopes.Lukas
LeCroy DSO math functions via GPIB - Page 1
Forum section: electronics / testgear

author: davorin
author_rank: Unknown
timestamp: July 28, 2014, 01:49:10 pm
content: HelloI have here a 9354AL and a 9414, both equipped with WP01 and WP02....Browsing through the GPIB programming manuals I don't see to find any functions where those math functions can be controlled remotely...Are those documents hard to get or is it just not possible to do?

author: AlfBaz
author_rank: Super Contributor
timestamp: July 28, 2014, 02:08:41 pm
content: Download theRemote Control manualAlthough they've titled it "LeCroy LC Oscilloscope Remote Control Manual REVP" it appears to be also for the 9300 series.Then look for the DEF or DEFINE function. It should give you everything you need.EDIT: actually if you goherethere's also a remote manual for the 9400 series by the looks of it

author: davorin
author_rank: Unknown
timestamp: July 28, 2014, 02:22:34 pm
content: Hmm....seen something similar in the 9400A operators manual....for defining the functions...But I don't see to find a command which actually triggers the functions or disables them, like pressing button "E"...

author: davorin
author_rank: Unknown
timestamp: July 28, 2014, 02:56:56 pm
content: Defining the functions seems to be fine...just the commands from 9400A programming manuals are wrong...Code:fe:def eqn,'ps(fft(c1))',maxpts,1000,window,rect,dcsup,offNow why is the FFT appearing on Ch3 output instead of Ch2..would look better with "GRID DUAL" instead of "GRID QUAD"...But still can't trigger the function remotely..

author: AlfBaz
author_rank: Super Contributor
timestamp: July 28, 2014, 04:52:29 pm
content: Quote from: davorin on July 28, 2014, 02:56:56 pmClearly we have different scopes, I have an LC574 but I can't imagine there would be very much difference. I tried your command but used TA instead of fe so as to set Trace A of the zoom + math. fe gave me a GPIB error. From what I can gather (looking at what lecroy's scope explorer names things) C1-4 for Channels 1 to 4 TA-B for zoom + math traces A to D and M1-4 for waves stored in memories 1 to 4QuoteWhen I executed the above command nothing visibly happened on the scope's screen, but when I turned Trace A on it was set up as an FFT.I imagine you would have to send it commands to go to dual trace grid and then turn on the trace
Need some help for choosing a function generator - Page 1
Forum section: electronics / testgear

author: asgard20032
author_rank: Regular Contributor
timestamp: July 28, 2014, 04:01:03 pm
content: Hi, I have some model in head, but to resume this up, im trying to get a decent function generator, not too much basic (modulation, sweep... are nice) with a budget of 350$ and less, with some exception.Here are the model that I found out:SDG1025SDG830SFG-1013DG1022DG1022AGFG-8219AAFG-2105AFG-2112AFG-2125Which one would be the best? (hard question I know, but based on experience, quality...)Any other model shall I consider?A new function generator would be nice, but i won't discard the possibility of a used one.I have a budget of 350$ and less, but it don't necessary mean i want to buy for 350$, but it also don't mean i want to buy the cheapest one.
New Spectrum Analyzer RIGOL ... but cool prices (joke) - Page 1
Forum section: electronics / testgear

author: max-bit
author_rank: Frequent Contributor
timestamp: July 21, 2014, 06:03:05 am
content: RIGOL presented new spectrum analyzers:- DSA832 - price ~ 4800 Euro ( 6500 $ ) up to 3,2 GHz- DSA832-TG - price ~6000 Euro ( 8100 $ ) up to 3,2 GHz + tracking generator- DSA875 - price ~ 5850 Euro ( 7800 $ ) up to 7,5 GHz- DSA875-TG - price ~ 7000 Euro ( 9450 $ ) up to 7,5 GHz + tracking generatorPrice does not include tax.Prices quite high (especially compared with the model 815).High prices discourage the purchase of analyzers.

author: TomThomas
author_rank: Contributor
timestamp: July 21, 2014, 10:36:15 am
content: Quote from: max-bit on July 21, 2014, 06:03:05 amShort question: did you compare the specs?From spec Point of view the DSA832 /875 have not much in common with DSA815 except the name and the chassis.IMO they should better have used a different series name. Now everyone compares pricing to DSA815.BRTom

author: skench
author_rank: Contributor
timestamp: July 28, 2014, 10:57:41 am
content: Hi all,Just been watching a video on the RIGOL-UK DSA875 in use at 5GHz…It was posted by Telonic in the UK see the link below.
Cyrustek LCR ES51919/ES51920 Data - Page 1
Forum section: electronics / testgear

author: DoDaMaffs
author_rank: Contributor
timestamp: July 27, 2014, 09:53:56 am
content: Greeting's fellow humans,I have been seaching for the pinouts of the Cyrustek LCR Chipsetsand have only found the 11 page datasheet with no detail on pins.Wondering if anyone has a schematic for a device that is usingthis array or the chipset itself.Cyrustek LCR ES51919/ES51920Many Thanks....Pete

author: kripton2035
author_rank: Super Contributor
timestamp: July 27, 2014, 10:15:23 am
content: it's reserved for lcr manufacturers. they sign a NDA for itmay be in 10 years, when the chip is obsolete they will publish it ?

author: DoDaMaffs
author_rank: Contributor
timestamp: July 27, 2014, 10:20:55 am
content: Thanks for the heads up,That's not only a shame it is also a pain.Should I remove or retract the thread,and if so how do I go about it ?Regards Pete

author: PedroDaGr8
author_rank: Super Contributor
timestamp: July 28, 2014, 12:50:15 am
content: Quote from: DoDaMaffs on July 27, 2014, 10:20:55 amJust leave it in case someone else had your same question on Google.
Fluke ir3000 FC connector for use with my 289's does it work w pc3000 - Page 1
Forum section: electronics / testgear

author: accesscontrolforum
author_rank: Contributor
timestamp: July 27, 2014, 06:07:57 pm
content: I bought the Fluke ir3000 from testequipmentdepot today to use with my Fluke 289's and Fluke Connect App for Android. Although is does not show the ir3000 as being compatible with the pc3000 does anyone know if it actually is?ThanksFYIhttp://www.testequipmentdepot.com/fluke/accessories/ir-connectors/infrared-connector-module-ir3000fc.htmhttp://en-us.fluke.com/products/digital-multimeters/fluke-ir3000-fc-connector.html#overviewhttp://en-us.fluke.com/products/all-accessories/fluke-pc3000-fc-wireless-pc-adapter.htmlhttp://en-us.fluke.com/products/digital-multimeters/fluke-289-digital-multimeter.html