Products > Test Equipment
Fluke 123 Scopemeter and battery replacement
DMM123:
--- Quote from: none on May 19, 2019, 08:55:43 am ---
@ DMM123
I think the information about thermistor and fuse is somewhere in this thread, or on the Fluke forums (try the links I posted previously) - I've seen it before.
EDIT:
These threads might be of interest:
https://www.eevblog.com/forum/testgear/usb-powered-fluke-123/
https://www.eevblog.com/forum/testgear/fluke-123/ (power supply)
--- End quote ---
Thank you, but I still don't see the thermistor value (beta), the part number, or the range of the thermistor in temperature. I have contacted a thermistor manufacturer and given them 40 measured values at different temperatures with the kOhm readings on the old battery. I will post what they say.
Jcm05:
Hello,
My Scopemeter does not work after battery exchange.
After seeing verified I found a polarity reversal of + and - on the battery.
This has caused a short internal circuit to my scopemeter and it does not work even connected to the power supply.
The 3 resistors R504, R506 and R507 have burned.
I replaced them but he still does not work.
Have you ever encountered the same problem and what is the solution?
Thanks for your help.
DMM123:
--- Quote from: DMM123 on May 19, 2019, 01:11:32 pm ---
--- Quote from: none on May 19, 2019, 08:55:43 am ---
@ DMM123
I think the information about thermistor and fuse is somewhere in this thread, or on the Fluke forums (try the links I posted previously) - I've seen it before.
EDIT:
These threads might be of interest:
https://www.eevblog.com/forum/testgear/usb-powered-fluke-123/
https://www.eevblog.com/forum/testgear/fluke-123/ (power supply)
--- End quote ---
Thank you, but I still don't see the thermistor value (beta), the part number, or the range of the thermistor in temperature. I have contacted a thermistor manufacturer and given them 40 measured values at different temperatures with the kOhm readings on the old battery. I will post what they say.
--- End quote ---
Well, so far no answer. I've emailed a couple of times but no response. Initially they said they would have an answer in a couple of weeks. Patience, I hope, is the key.
iurius:
Thank you very very much!
alwanuel:
Hi, would you please consider a YouTube video, what you did is really useful, please consider to share it properly. Cheers.
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