(SOLD) FS (US): Fluke 343A - fully rehauled - Page 1
Forum section: electronics / general

author: Rax
author_rank: Super Contributor
timestamp: July 28, 2024, 11:07:49 pm
content: Please see here:https://www.ebay.com/itm/266888268493Please ask any questions you may have.

author: Tony_G
author_rank: Super Contributor
timestamp: July 29, 2024, 12:40:04 am
content: Hey RAX,The . at the end of your URL is breaking the link -https://www.ebay.com/itm/266888268493Caught me before as well when actually using punctuation and the auto-url thing on the forum. It annoyed me enough that I actually used the BBCode to make sure I could end a sentence with a url and full stop - Now all you young people take your music and get off my lawn...TonyG

author: Zucca
author_rank: Unknown
timestamp: July 29, 2024, 06:35:28 pm
content: Hey Rax nice job!Quick one for you, I have a10V xDev reference board, do you think it would be easy to replace/upgrade/integrate it with the internal 343A 15V reference?Please go soft I consider myself a beginner in ppm/metrology stuff.EDIT:oh booy it's a rabbit hole

author: Rax
author_rank: Super Contributor
timestamp: July 30, 2024, 05:00:30 am
content: Quote from: Zucca on July 29, 2024, 06:35:28 pmI haven't personally built the 10V xDev board (though I had it here a couple of times due to the US Cal Club), but I guess you could either scale it up to 15V (it scales the 7V reference up to 10V, though I think going to 15V is a bit too far and may diminish a bit the performance the LTZ1000 is capable of), or just use, in some manner, two series LTZ1000s to add up to about 15V, and adjust to exactly 15V with the unit's REFERENCE VOLTAGE ADJUSTMENT. I'd say doable but not trivial.

author: coromonadalix
author_rank: Super Contributor
timestamp: July 30, 2024, 09:57:41 am
content: i would say no, dont hack or mod itbecause you have added circuitry around the reference, you have a chopper amp and other things to help stabilize the voltage and get / gives the many voltages settings you needgrab the service manual for theses series and do a reading ...

author: Zucca
author_rank: Unknown
timestamp: July 30, 2024, 01:05:02 pm
content: Quote from: coromonadalix on July 30, 2024, 09:57:41 amI did but in the schematics the ref board is just a box.

author: Rax
author_rank: Super Contributor
timestamp: July 30, 2024, 01:41:21 pm
content: Quote from: Zucca on July 30, 2024, 01:05:02 pmThe schematic of the 15V ref supply is in the SM available from Fluke.

author: Zucca
author_rank: Unknown
timestamp: July 30, 2024, 02:12:12 pm
content: Okay I think I get it now...This is where I got stuckbut a couple of pages laterwhat a nice device! Having all the schematics double the value!

author: Rax
author_rank: Super Contributor
timestamp: July 30, 2024, 02:22:28 pm
content: Zucca - I'd consider getting one and studying it a while hands on before considering upgrades and any modification. You may find you're happy with it for what it is.

author: Zucca
author_rank: Unknown
timestamp: July 30, 2024, 02:31:16 pm
content: You read my mind Rax!I am a strange animal that needs to mod and hack everything by default.BTW I found the original thread about my FX 10V ref boardAnother little hurdle is the +-12V supply for the 10V ref board...I am also assuming the above 10V FX ref board specs > 15V ref board specs which still needs to be proven and I think it is not a trivial test.We all know a (working) ref board gets better with time, like good wine.To be honest I love the 343A but I really do not need it, give me a couple of days until I am done fighting with my brain.

author: Rax
author_rank: Super Contributor
timestamp: July 31, 2024, 12:56:57 am
content: The unit has sold.