[SOLD] FS [UK]: Fluke 123 scopemeter - Page 1
Forum section: electronics / general

author: giosif
author_rank: Frequent Contributor
timestamp: January 28, 2020, 08:07:13 pm
content: Hi,I am selling a Fluke 123 scopemeter in used, but working condition (to the degree I could test it).The scopemeter comes with a battery that seems to hold charge at a reasonable level (to me), but I cannot attest to its health.Included with the scopemeter is also a power cable to allow one to charge it using a bench power supply (I don't have the original Fluke supply).Other than that, nothing else is included (i.e. BNC adapters, test leads, etc.).Asking price is £150 plus shipping.Update:This is now SOLD.

author: giosif
author_rank: Frequent Contributor
timestamp: January 28, 2020, 08:07:55 pm
content: And a couple moe photos.

author: giosif
author_rank: Frequent Contributor
timestamp: January 28, 2020, 08:08:46 pm
content: Ah, and apologies for the mess in the background of these photos!

author: toastedcrumpets
author_rank: Regular Contributor
timestamp: January 30, 2020, 11:42:40 am
content: I'll take it, PM me cost for shipping to Aberdeen please.

author: toastedcrumpets
author_rank: Regular Contributor
timestamp: February 05, 2020, 08:29:09 am
content: Item received and I'm very happy with it thanks! All in great condition, postage was quick too. I think I might replace the backlight at some point as a fun project following this ideahttp://areciv.com/blog/2013/02/fluke-scopemeter-97-el-backlight-repair/,but its all completely usable enough for now. Already ordered some probes and a separate PSU, thanks again!

author: giosif
author_rank: Frequent Contributor
timestamp: February 07, 2020, 11:20:42 pm
content: Thank you for the feedback!Glad to hear you are happy with the scopemeter.With regards to the backlight mod, I think the more straightforward way would be to replace the CFL lights with LED strips.You will need some DC-DC converting to do in order to make that work, but I still think it would be easier and nicer than what is mentioned at that link.

author: toastedcrumpets
author_rank: Regular Contributor
timestamp: February 07, 2020, 11:42:04 pm
content: Ah you're right it's CCFL, not EL like the series I linked, my mistake. Of course I'd just replace the tube with LEDs, I've done that before for other equipment. Thanks again!

author: giosif
author_rank: Frequent Contributor
timestamp: February 08, 2020, 03:00:50 am
content: That pretty much sums up how much I know about these things: can't even spell CCFL right.Thanks for the correction!BTW, what size of LED's would you consider for such conversion?

author: toastedcrumpets
author_rank: Regular Contributor
timestamp: February 08, 2020, 03:08:37 am
content: I didn't mean to correct you! I was just looking in the datasheet for the meter and saw a CCFL, otherwise I would have just repeated CFL back at you.I'll be honest, I've mainly replaced the tubes in bench equipment. For those I usually use kits like this:https://www.ebay.co.uk/itm/PF-490mm-LED-Backlight-Strip-Kit-22-Inch-CCFL-LCD-Screen-To-LED-Monitor-S99/264363173489?hash=item3d8d45e671:g:hO4AAOSwnBpdBKNWIf the fluke is particularly compact, which looks to be the case according to the video below I might actually just buy a CCFL tube in the right length and replace it.If you check out that video, you can see the backlight on the left of the screen, its easy to identify as the LCD doesn't have the inverter circuit on it for the high driving voltages, so there's two wires heading to the mainboard for that and the wires go to opposite ends of the tube.I've started recording my repairs so if I actually do this I'll post the video here.

author: giosif
author_rank: Frequent Contributor
timestamp: February 08, 2020, 12:21:22 pm
content: Thanks for the information!I might buy one of those LED kits, even if only to evaluate size, practicality of installing it, etc.But it sounds doing this for the Fluke 123 might be a challenge and just replacing the CCFL tube could be the easier route.I am using a Fluke 124 and the backlight on that is ok at the moment, but I might revisit this in a few years' time.