Products > Test Equipment
Fluke 123 Scopemeter and battery replacement
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EIKA:
And small offtotic: what I need to perform FW upgrade? One of extremely expensive Fluke cables? Serial or USB one? Something like $200 for any one...
teksturi:
Check this out. http://omapalvelin.homedns.org/fluke/
find CP2102 on that page and you will get your cable  :box: I just started to design my own adapter.
teksturi:
Just ordered my own version https://oshpark.com/shared_projects/nLb7niLM I will tell how it works.
patrickdevos:

--- Quote from: melhookv12 on February 03, 2015, 04:51:13 pm ---
Hi I have also purchased a Cameron Sino battery from e bay. I tried a refresh cycle and had no luck. After using Google I ended up here.

I also think my battery is wired incorrectly but I have no reference to relocate the wires. Can someone confirm the location of pin 1. I have tried to attach a picture and it is with the security tag facing upwards. In the op's it doesn't show a tag on the connector, does this mean its facing downwards or it doesn't have one.

Any help greatly appreciated.

--- End quote ---
Hy
I have same problem. Did you solved it? Can you post photo with correct wiring. Where is 1 on the plug. Maybe the colours on the plug photo
Thank you




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patrickdevos:

--- Quote from: Cones on March 02, 2013, 03:25:46 pm ---Hi,

I bought a cheap Fluke 123 scopemeter from ebay with lines on the screen and a flat battery. No problem I thought, I can live with the lines and I will just get a new 3rd party battery for £15 from Amazon here in the UK.

This is where all the fun and games starts!

The original Fluke battery is a BP120 and is a 2000mAh NiCd unit. It would not charge in the scopemeter and would only maintain the unit for 30 second or so before it powered down.

The new replacement battery is made by Cameron Sino and is a BP130 Equivalent 3000mAh NiMh unit.

But on comparing the wiring on the 6 pin connector for the two batteries the new 3000mAh one is wired wrong and will not work at all in the scopemeter. As it was low cost and not worth the hassle of changing it. I have investigated further and resolved all of the problems with it.

This is the correct pin wiring for the scopemeter battery connector.

Pin 1 Not Connected
Pin 2 +
Pin 3 -
Pin 4 I Identification (0 Ohms=NiCd) (825 Ohms=NiMh) Return on Pin 3
Pin 5 Not Connected
Pin 6 T Temperature Sensor (NTC Resistor) Return on Pin 3

So I swapped the connector pins round in the plug on the new battery and then the meter would power on with it. But it still would not charge fully or perform a battery refresh operation.

After a bit of Googling and a look at the Fluke service manual I found the above pinout information and I also discovered the correct resistance value for the NiMh battery.

I measured the value on my battery Identification resistor and I got a resistance of 0.8301 Meg Ohms not the 825 Ohms it is supposed to be. So the manufacturer not only wired the plug wrong they also compounded the problem by putting the wrong resistance value in as well!

So I have now cut open the heat shrink and corrected their mistakes as you can see in the pictures below.

Battery


Original and pending replacement resistor


Crap insulation on the opposite side of the original resistor


Removed resistance value


Replacement Resistance Value


Correct Plug wiring


Repaired and heatshrink added for a slightly better insulation


Red insulation tape as I have run out of larger heatshrink. This may get replaced in future if I can be bothered!


Original Battery pack


Refresh now detects the NiMh and changes from 12 (NiCd) to 19 Hours! Result.






--- End quote ---
Hello
Please could you show with photo pin layouts? Or photo so to see clear all wired coulours in plug
I dont have original batt to compare wired on plug
Thanx



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