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| Fluke 123 Scopemeter and battery replacement |
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| klim:
Hi i'm interested in the 18650 Battery battery mod for Fluke 123. Is there not a problem to drive the Fluke 123 with 150% (7,4V instead of 4,2V) of it's specified voltage battery level? This is the original battery pack pinout. 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 How do you have connected the identification resistor und NTC in your 18650 battery pack? |
| klim:
One more question: have you used cells with protection board (built in cell / external pcb)? |
| rsivan:
--- Quote from: klim on September 12, 2014, 09:43:37 pm ---Hi i'm interested in the 18650 Battery battery mod for Fluke 123. Is there not a problem to drive the Fluke 123 with 150% (7,4V instead of 4,2V) of it's specified voltage battery level? This is the original battery pack pinout. 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 How do you have connected the identification resistor und NTC in your 18650 battery pack? --- End quote --- yes I've used normal cells but protection board is on battery holder,I leaved resistor on wiring, keeping NiMh setting,about higher voltage: I done some test,starting from 4,5v to 10-12v and watching at current drain, from 4 to 9-10v current drain going down while increasing voltage,this good because internal LDO in fluke controller doing the right job,after 10-12v start to rise ,and this not good,but for us running on Li-Ion is perfect because will never go above 8.4v(4.2*2) ,also stand-by current drain is very low like 1-2mA same as original or lower. |
| klim:
Hi rsivan and thank you very much for your reply. Now it's time to renew my Fluke 123 with new state of the art li-ion powered energy ;-) |
| melhookv12:
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. |
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