Products > Test Equipment
ohms issue with a Fluke 87 - solved
<< < (3/5) > >>
LazyJack:
Check the input jack where it is soldered to the pcb. On older 87s the solder or the jack can crack.
Fungus:

--- Quote from: istovit on August 17, 2021, 03:54:34 am ---this may happen more often than we think and could  go unnoticed being only a few ohms

--- End quote ---

Nope. Not around here.

This is a bad contact, bad lead or bad solder joint in the input jack.  Wiggle the leads, press on the input jacks, see of it varies.
bdunham7:

--- Quote from: Fungus on August 17, 2021, 08:17:11 am ---Nope. Not around here.

This is a bad contact, bad lead or bad solder joint in the input jack.  Wiggle the leads, press on the input jacks, see of it varies.

--- End quote ---

I have had several meters, including bench models, with intermittent input connection problems and they can be devils to track down depending on where the issue is.  I wonder if it is possible for a cracked solder joint to creep back together given enough time in a desk drawer?
AVGresponding:

--- Quote from: bdunham7 on August 17, 2021, 03:52:31 pm --- I wonder if it is possible for a cracked solder joint to creep back together given enough time in a desk drawer?

--- End quote ---

Probably, through the formation of tin whiskers.
istovit:
just finished cleaning the rotary switch and were still between 2-3 ohms with leads crossed
1003 ohms at the ma. input and 2.3 at the 10a input. with the delta function I was able to  read
a 2 ohm resistor. I could live with this but would rather not,what protection components are
involved when a voltage is applied in ohms mode?   TIA
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod