fluke scopemeter 12V auxiliar power input - Page 1
Forum section: electronics / repair

author: diegoperez
author_rank: Contributor
timestamp: February 03, 2016, 08:16:47 pm
content: Hi everybody,I recently bought a fluke 105B scopemeter with a missing power adapter and a corroded battery.(service manual)https://dl.dropboxusercontent.com/u/24089625/Fluke%20105%20Series%20II%20Service%20Manual%20%5B210%5D.pdf(battery)https://dl.dropboxusercontent.com/u/24089625/bateria.jpgI cleaned the battery teminals and put some c-size batteries and it seems to work fine.Now, to fully restore it to its original conditional, it would be neccesary to buy the battery pack and the mains plug adapter.Batttery:http://www.amazon.com/Fluke-Replacement-Battery-Capacity-4500mAh/dp/B00444NTZQ/ref=pd_bxgy_469_img_2/186-9721266-5215022?ie=UTF8&refRID=0VKTPJFZNVEMCNKDZ2C1Mains adapter:http://www.amazon.com/Fluke-PM8907-808-Universal-Switchable/dp/B000VRHD2AHowever, since I don't really need the portable operation feature right now, could it be possible to hack a cheaper adapter using the auxiliar 12V input that Dave refers to in this video (min 5:00)?After checking the service manual, I'm not sure if it could be possible to simply power the device through this auxiliar 12V input, and what are the specs that the 12V adapter should meet (max output current, max voltage ripple, isolation...)? Any advice on how to restore this device would be appreciated.Thank you for the attentionEDIT: service manual link

author: Candid
author_rank: Regular Contributor
timestamp: July 03, 2016, 01:09:01 pm
content: You may alreday have a solution but it may help others. I have a Scopemeter 99 and a 99B and both of them work fine with a standard stabilized 12V power supply. I tested with an bench psu and they both work fine down to something over 7V. So stable 12V should be enough for everything.I have two original psus. They are extremely simple. Only 4 diodes for rectifying and one cap that's it. I never expected such a simple psu from Fluke. No real stabilisation. It has an idle voltage of about 21V. It's garbage!The plug is a DIN 45323 plug that I bought from reichelt for 73 Cent:https://www.reichelt.de/Hohlstecker/LUM-NES1-GR/3/index.html?ACTION=3&GROUPID=3258&ARTICLE=116233A psu that would fit fine 15V/0,4A:http://www.reichelt.de/GS06E-4P1J/3/index.html?&ACTION=3&LA=446&ARTICLE=161593&artnr=GS06E-4P1J&SEARCH=Netzteil+15VI have it running with a 12V stabilized psu and no problems. There is no difference compared to the original psu.As battery I use 4 standard Baby C cells from Ansmann (model type "maxE"). They have real 4500mAh and are very long term stable. I charge them in an external charger. The battery packs are to expensive, have much less capacity and are charged through the internal charger unit that I don't trust. Charging 4 cells in a row is not a good solution.Another solution if you do not need the battery option would be to use the battery connections to add a "5V input" so you could drive it with a standard 5V USB psu.

author: dinix
author_rank: Contributor
timestamp: February 22, 2018, 11:26:45 am
content: Quote from: diegoperez on February 03, 2016, 08:16:47 pmHi, could you please repost the link for the service manual.Regards

author: EHT
author_rank: Frequent Contributor
timestamp: February 22, 2018, 10:24:42 pm
content: See my post:https://www.eevblog.com/forum/repair/fluke-scopemeter-9597-ac-adaptor-and-batteries/msg1217415/#msg1217415Still working fine - nice cheap fix.

author: dinix
author_rank: Contributor
timestamp: February 23, 2018, 12:06:58 pm
content: Thank you ETH.But i was really searching for the service manual for 96B, 99B ou 105B.Also i need to find some replacement LCD for these units.Regards

author: sanchox
author_rank: Newbie
timestamp: May 19, 2021, 07:34:22 pm
content: Quote from: dinix on February 23, 2018, 12:06:58 pmHi, dinix!I've got one Fluke 105 Scopemeter Series II, and it has some issues with display circuity.Did you find the Service manual for 105B?

author: dinix
author_rank: Contributor
timestamp: May 24, 2021, 11:12:37 am
content: hi sanchoxno, didn't find any