Author Topic: [Fixed] BM235 issue no Loz DC, Voltage, ohms and diode  (Read 995 times)

0 Members and 1 Guest are viewing this topic.

Offline taiteki

  • Contributor
  • Posts: 15
  • Country: es
[Fixed] BM235 issue no Loz DC, Voltage, ohms and diode
« on: November 30, 2017, 05:30:03 pm »
I buyed 1 year and a half a bm235
for the first time a the dmm have a dim lcd but i doncared about that because i can read with no problems.
but some weeks ago the DMM stop to work poperly, i suppossed to be a battery problems and buy some new battery, but the issue continue.

The dmm dont work in voltage LoZ,DC, ohms and diode.

1 Loz, i put a 9V battery with arround 8,3V and got this.

2 DC the same with the DC range.





3 the ohms start with 0L but after short the terminas always show 0000.0ohms





4 in diode always show 0.000v


some one have the same problem?

thanks and apologies for my english.
« Last Edit: November 30, 2017, 09:41:21 pm by taiteki »
 

Offline retiredcaps

  • Super Contributor
  • ***
  • Posts: 3315
  • Country: ca
Re: BM235 issue no Loz DC, Voltage, ohms and diode
« Reply #1 on: November 30, 2017, 07:40:42 pm »
Check the soldering on the inductor.  See

 
The following users thanked this post: taiteki

Offline taiteki

  • Contributor
  • Posts: 15
  • Country: es
Re: BM235 issue no Loz DC, Voltage, ohms and diode
« Reply #2 on: November 30, 2017, 09:39:13 pm »
Thx retiredcaps  :clap:.

dont remenber that video!.

L3 disapeared.





i put a new ferrite bead and
 :-/O


 :-DMM
 

Offline retiredcaps

  • Super Contributor
  • ***
  • Posts: 3315
  • Country: ca
Re: BM235 issue no Loz DC, Voltage, ohms and diode
« Reply #3 on: November 30, 2017, 10:12:41 pm »
L3 disapeared.
I wonder if this L3 will be a long term problem?  You are the 3rd or 4th person to have this bad soldering problem.

BTW, for the LCD contrast Dave did a video too.

 

Offline retiredcaps

  • Super Contributor
  • ***
  • Posts: 3315
  • Country: ca
Re: [Fixed] BM235 issue no Loz DC, Voltage, ohms and diode
« Reply #4 on: November 30, 2017, 10:16:15 pm »
We are also finding out that on some older Fluke 17x series, the soldering on that inductor/ferrite bead has aslo degraded or shook loose due to abuse?  However, this is over several years, possibly one decade.

https://www.eevblog.com/forum/repair/fluke-179-repair/

https://www.eevblog.com/forum/repair/fluke-179-not-working/

https://www.eevblog.com/forum/repair/fluke-179-76688/
 
The following users thanked this post: taiteki

Offline retiredcaps

  • Super Contributor
  • ***
  • Posts: 3315
  • Country: ca
 
The following users thanked this post: taiteki

Offline joeqsmith

  • Super Contributor
  • ***
  • Posts: 5701
  • Country: us
Re: [Fixed] BM235 issue no Loz DC, Voltage, ohms and diode
« Reply #6 on: December 01, 2017, 12:04:12 am »
Mine had a notch cut out I assume for this reason.

https://youtu.be/g3uYcHAumhA?t=436
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 
The following users thanked this post: taiteki

Offline taiteki

  • Contributor
  • Posts: 15
  • Country: es
Re: [Fixed] BM235 issue no Loz DC, Voltage, ohms and diode
« Reply #7 on: December 01, 2017, 06:32:16 pm »
Thxs for the links.

in the case of this DMM it was in a non climatized zone, 40ºC-45ºC in summer and 8ºC-20ºC winter (Seville-Spain).

Possibly it has been damaged for a long time, since I have only used it to measure current.

in the image of my dmm it seems that the ferrite bean broke apart.

 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf