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| Fluke 123 Scopemeter and battery replacement |
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| Dbldutch:
Be aware of the Cameron Sino battery packs. I have one, the CS-FBP120SL, and it simply does not work in my 123. It comes with the yellow NTC lead connected to a normally unused pin (1 or 5) on the connector and that is the only position the scope will boot. If you connect the NTC lead to the proper pin 6, the boot procedure is terminated, and the scope will not work, not even with the wall wart connected. You can identify this battery pack by the lack of the second black wire, instead, there is a yellow one, which is used for the NTC connection. Although it says on the battery pack that it uses NiMH cells, there is no resistor in the identification link, so the scope treats it as a NiCAD pack. The bad part is that with the NTC lead going to an unused pin, the scope will not charge this pack. I have modded the pack and added the 825 Ohm resistor, but without success. If you have a working pack, better yet an original one, can you please measure the NTC resistance at room temperature, or identify the partnumber? I just ordered another pack, from another supplier, and from the picture, it seems to have the proper wiring. |
| Dbldutch:
I have a follow-up on my previous post. After looking long and hard to find a pack that was not coming from the apparently unreliable Cameron Sino stables, I found one that I ordered from 123accu.nl in the Netherlands. From the pictures, it was clearly not coming from CS, and judging from what I could see of the connector, it had two black wires, so I ordered it. It just arrived, so I quickly got my DMM switched on and measured the resistance of the NTC and the ID wires against ground. The ID showed the presence of the 825 resistor, and the NTC showed about 12K (the pack was still cold from the transport). The voltage was about 5.1V, so I smelled success. Although the connector had another (red) wire going to the unused pin 5, I installed it in my 123, and it switched on perfectly with only the battery connected. Unfortunately, there is no manufacturing information on the pack, only a part number : B11483 It is a NiMH pack, with 4.8V, 3000mAh/14.4Wh, just as it supposed to be. In the box I even found two black foam strips to replace the two already in the 123, which is a nice touch. On the 123accu.nl provided box, it clearly states this is a Fluke BP120MH / B11483 / BP120 accu. Of course these 123's are made in the Netherlands, but in any case, they have the right product. The version number of my 123 readws V01.08, and is from 2000. This also means that the refresh rate is still showing 12 hours, but at least is recognizes the pack as a valid one. Now I need to build me an optical cable and see if I can update the firmware to the latest version that my hardware version will support. I'm happy, and I hope you can use this information to get your 123 up-and-running as well. |
| umkumiut:
--- Quote from: Dbldutch on November 08, 2016, 07:45:53 pm ---Now I need to build me an optical cable and see if I can update the firmware to the latest version that my hardware version will support. --- End quote --- From Fluke's website: "Instruments with firmware version V1.0x cannot be upgraded to V2.03" V1.08 is the latest from the 1.xx family, so there is no further update. The foam strips are indeed a nice addition, mines already started to decompose (my instrument is from 1998)... http://en-us.fluke.com/support/software-downloads/fluke-scopemeter-123-124-series-version-2-firmware-upgrade.html |
| Dbldutch:
Hi Umkumiut, 1998?, you must have one of the earliest models! My version is already at V01.08, so no chance to update the firmware, thanks for the hint. I am building an optical interface anyway to connect the 123 to a computer and get access to the data. Regards, Paul |
| abid0011:
i buy individual battery cells each cell is 4000mah 1.2v the battery pack with the fluke 123 is 2000mah. when open the original battery pack i remove the top covered pvc to copy the wiring connection i saw some two thing connected. can i remove the old wiring and solder to the new battery cells as on the fluke battery pack. need suggestion . thank u |
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