Guildline Instruments - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: August 07, 2017, 02:58:53 am
content: Didn't know about this company.10000A precision current sourceamong tons of other cool stuffhttp://www.guildline.ca/primary-electrical-metrology/highest-level-standards/precision-current-sources

author: Vgkid
author_rank: Super Contributor
timestamp: August 07, 2017, 03:02:54 am
content: Another neat company to look into is mintl (Measurements International) another Canadian firm.

author: Conrad Hoffman
author_rank: Super Contributor
timestamp: August 07, 2017, 03:28:25 am
content: I own one Guildline item, a resistance standard that all the oil leaked out of. Still accurate though. They make cool stuff, but make sure you're sitting down if you read their price list.

author: nidlaX
author_rank: Frequent Contributor
timestamp: August 07, 2017, 03:50:14 am
content: I've seen a lot of their older gear go for low prices on eBay, including rebadged Solartron multimeters.

author: 0.01C
author_rank: Regular Contributor
timestamp: August 07, 2017, 05:04:15 am
content: I like Guildline ,I own two guildline hamon resistor ,10R & 1k and two guildline thermometer.

author: Moon Winx
author_rank: Regular Contributor
timestamp: August 07, 2017, 05:42:45 am
content: I heard they used to have great products but not so much anymore and my experience is consistent with that. I haven't seen issues with their passive DC resistance products (shunts & resistance standards) but their electronic stuff seems to be a mess.Measurements Intl, who I think sucked the talent from Guildline, has awesome hardware but just about all of it requires the use of their software. And their software, while powerful, looks like it was developed in the 90s and never updated.

author: TiN
author_rank: Super Contributor
timestamp: August 07, 2017, 12:06:13 pm
content: And I have one or two Guildline 9330 resistance standards.Guildline known for their bridges, with up to 10.5 digits of resolution

author: Echo88
author_rank: Frequent Contributor
timestamp: August 07, 2017, 12:37:43 pm
content: I would love to see a teardown of one of those Guildline DCC-bridges. But i dont assume one of you bought a puppy like these?:http://www.ebay.com/itm/Guildline-9975-Current-Comparator-Resistance-Bridge-W-9460B-Amplifier-/232423995926?hash=item361d8cba16%3Ag%3A48cAAOSw0RlZd4tN&nma=true&si=FFB3esL5JW%252FJYx36Gm25uUH7JpQ%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

author: TiN
author_rank: Super Contributor
timestamp: August 07, 2017, 02:45:10 pm
content: Nah, way to unshippable.

author: CalMachine
author_rank: Frequent Contributor
timestamp: August 07, 2017, 03:19:42 pm
content: Guildline makes (or atleast used to) some phenomenal equipment. As others have stated, I've got mostly their passive stuff, no electronic equipment.Here is a recent one we picked up!

author: ManateeMafia
author_rank: Frequent Contributor
timestamp: August 08, 2017, 01:22:38 am
content: I have one of their 9520 teraohmmeters . It's a beast but can be calibrated with a single 10M standard resistor and beats a lot of meters in the high G/T ohms ranges.

author: lowimpedance
author_rank: Super Contributor
timestamp: August 08, 2017, 03:15:22 am
content: Those 'Brown Laminex' baths just keep chugging away year after year.Quote from: Echo88 on August 07, 2017, 12:37:43 pmCoincidentally there are 2 9975's no longer used in the store room at work , could take some pics when I get a chance.

author: Echo88
author_rank: Frequent Contributor
timestamp: August 08, 2017, 07:21:05 am
content: Your firm seems to own a lot of old stuff lowimpedance. Is it somehow also the owner of the giant warehouse shown in the end of first Indiana Jones movie?

author: hwj-d
author_rank: Frequent Contributor
timestamp: August 08, 2017, 12:31:19 pm
content: Looks like a kitchen sink. Could it cook coffee?

author: Echo88
author_rank: Frequent Contributor
timestamp: August 09, 2017, 10:52:43 am
content: Thanks to a hint from the user "0.01C" i was able to find the article from zlymex about a Guildline 9975-teardown:http://bbs.38hot.net/thread-4488-1-1.html

author: lowimpedance
author_rank: Super Contributor
timestamp: August 09, 2017, 11:21:17 am
content: That is pretty comprehensive a teardown.What ever happened to Zlymex ?, just stopped comming to this forum after being quite active. really a shame .

author: jeroen79
author_rank: Frequent Contributor
timestamp: August 13, 2017, 11:12:25 pm
content: Quote from: EEVblog on August 07, 2017, 02:58:53 amWhat would that be used for?

author: manganin
author_rank: Regular Contributor
timestamp: August 14, 2017, 08:23:09 am
content: Quote from: jeroen79 on August 13, 2017, 11:12:25 pmhttps://www.nist.gov/news-events/news/2013/01/minimizing-uncertainty-current-events

author: Echo88
author_rank: Frequent Contributor
timestamp: August 14, 2017, 09:30:31 am
content: Maybe they also use those to imprint the current in various superconductivity coil projects, like used in CERN or for tokamak-design fusion plants.

author: TiN
author_rank: Super Contributor
timestamp: August 14, 2017, 01:56:45 pm
content: Saw a lot of CERN documents, where they use Flux-gate DCCTs, like LEM Ultrastab at LHC. These beasts capable for ppm-level accuracy with kiloamps as well.QuickGoogle searchshows some neat setups for their current standard transfers.

author: jeroen79
author_rank: Frequent Contributor
timestamp: August 14, 2017, 05:59:33 pm
content: Quote from: manganin on August 14, 2017, 08:23:09 amMicroOhm resistors, commonly known as a short circuit.

author: Emrtech
author_rank: Contributor
timestamp: February 16, 2018, 06:37:41 am
content: Dear Community,Attached is a rare service manual for the 9540 Guildline Thermometer that includes the complete schematics.It might be useful if you need to service your instruments. The resistance converter frontend of the design is very interesting as it makes use of an offset cancelling flying capacitor technique. All opamp offsets are elegantly eliminated using this method developed at the CRC.Best Regards,GerhardEdit: I have been advised of some problem with the file and will fix it tomorrow. Thank you for your patience.It appears the file is too large with 2.9Mb. That is a problem. Perhaps I can split it up.

author: Vgkid
author_rank: Super Contributor
timestamp: February 16, 2018, 06:45:12 am
content: Quote from: Emrtech on February 16, 2018, 06:37:41 amYour manual refused to upload correctly.

author: Emrtech
author_rank: Contributor
timestamp: February 16, 2018, 07:13:22 am
content: Thanks for letting me know. I will address it tomorrow. I can't upload it from my iPad.Gerhard

author: 0.01C
author_rank: Regular Contributor
timestamp: February 16, 2018, 09:36:59 am
content: GL9540 service manualhttp://cloud.tapatalk.com/s/5a86a63889b0a/GL9540_ServiceManual.pdf

author: doktor pyta
author_rank: Frequent Contributor
timestamp: February 16, 2018, 10:00:00 am
content: Thanks for the manual of GL9540.@0.01C : from Your experience - what is the level of noise ?P.S. Take a look on the schematic.This is just beautiful.Relatively cheap components are used to design high accuracy front end.

author: Emrtech
author_rank: Contributor
timestamp: February 16, 2018, 03:29:12 pm
content: Thanks for doing it for me. It is the same manual I have.Regards,Gerhard

author: Emrtech
author_rank: Contributor
timestamp: February 16, 2018, 03:33:57 pm
content: Under stable conditions, only the last digit rolls occasionally around a little. +/- 1-2 LSD.

author: manganin
author_rank: Regular Contributor
timestamp: July 05, 2024, 06:11:58 am
content: Anyone in France with too much time and space?https://www.ebay.com/itm/296546160707

author: andrewtaylor
author_rank: Contributor
timestamp: July 05, 2024, 12:43:40 pm
content: Quote from: manganin on July 05, 2024, 06:11:58 amThis seller in France is a really reliable one. I bought a lot of used T&M equipment from him during the last years. All top quality, no hidden fauilts...But sorry, I've no space for the of measurment furniture .-)WAF is too low to get it into the house without troble...grin

author: NANOJOLTS
author_rank: Contributor
timestamp: July 05, 2024, 05:32:55 pm
content: Hey, lots of great Guildline demos/info. on Youtube! I learned a few things.

author: BarrowBoy
author_rank: Contributor
timestamp: July 09, 2024, 06:45:41 am
content: Hi Folks,Love this thread. Know a bit about this gearAll, I'll say on the matter at this point of time.

author: stevebyan
author_rank: Contributor
timestamp: July 09, 2024, 05:42:43 pm
content: Here’s my pair of non-functional Guildline 9520 Teraohmmeters.Artek has a manual, but it appears to be missing the schematic for the display section. Shouldn’t be too hard to reverse engineer, it’s all just ancient TTL.

author: BarrowBoy
author_rank: Contributor
timestamp: July 09, 2024, 06:26:58 pm
content: The background in the picture is as cool as your 9520's in the foreground. good luck salvaging all of them geriatrics . I can't help you in that regard, but well worth the effort. I recently supplied a client a replacement stir motor for a old Guildline liquid bath, that frankly can't be replaced in their mind. Pretty sure it was 1977 vintage. Could Guildline and did Guildline provide a replacement motor...YES...Was it in stock, NO....did it take ages and ages to arrive...YES......was it free or low cost....NO....but did it allow a highly trusted, with masses of historical calibration data remain within context...YES.Dave started this thread, again....just informing. I mean who in this forum is the market for a Guildline Resistance Bridge (and I mean a brand new one) ...somebody Surprise me.

author: BarrowBoy
author_rank: Contributor
timestamp: July 09, 2024, 07:25:04 pm
content: And here's the weird link between Dave and Guildline despite them both being involved in some pretty salty gear, I'd say Dave was closer to a piece of Guildline equipment while out at sea conducting sea mapping surveys and upsetting dolphins than he may have realized. I like that word

author: EEVblog
author_rank: Unknown
timestamp: July 12, 2024, 12:22:32 am
content: Quote from: BarrowBoy on July 09, 2024, 07:25:04 pmHad never seen them actually. We didn't need any "standard seawater" AFAIK for our in-house 10m deep test tank. Not sure how that was calibrated actually, that was mainly used by the military guys. Seismic was a bit more loosy-goosy, we'd just chuck it in the actual ocean.

author: donlisms
author_rank: Frequent Contributor
timestamp: July 12, 2024, 08:14:53 am
content: The Australian Bruce V Hamon, of 100:1 build-up resistor fame, moved from working on resistance to another department at CSIRO shortly after publishing that article. There, he focused on analyzing tides and currents and temperatures and that sort of thing, driving around in boats and throwing instruments in the water.Perhaps I'm stretching too much to see parallels with Dave.

author: leighcorrigall
author_rank: Frequent Contributor
timestamp: July 13, 2024, 01:51:35 am
content: Quote from: BarrowBoy on July 09, 2024, 07:25:04 pmHere is another Canadian company that does oceanic metrology.https://rbr-global.com/