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| Fluke 123 Scopemeter and battery replacement |
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| carl_lab:
Is your 4000mAh battery NiMH type? NiMH has a significant self discharge. Which time does it take to completely self discharge? |
| abid0011:
suppose I put the scope for charge 5 hours. yes the battery type is 4000 mah Nimh when I power on the scope the battery will discharge with in 30min and the x sign shows on the batter icon. |
| carl_lab:
I don't know, if there's a timeout limit for charging time, or not, but if it is, your batteries will not full charged. 5 hours charging at 400mA will charge your battery only 2000mAh (or 50% of 4000mAh). Here's a link to mod charge current from 400mA to 800mA to overcome possible timeout limit: http://iksor.si/en/2017/04/03/fluke-123-modifikacija-na-liion-in-led-osvetlitev/ Can you charge your battery externally from a laboratory power supply, RC charger or similar to 8,4V? Then test operating time of your scope to shut down. |
| abid0011:
thank u for reply. need one suggestion. i am a electrician and now i start learning electronics as hobbyist. fluke 123 is a scope meter dual multi meter with scope. the fluke have black line on display and also facing problem with the battery. i am thinking to sell this unit or keep it in my storage. and buy a fluke 28-2 or 87 - v multi meters. question is that fluke 123 worth to spend time to make it perfect and what u think as we know its old unit still better in functionality then the above mentioned meters. thank u |
| carl_lab:
Fluke 123 (or 99) is a scopemeter, not only a simple multimeter as the others you mentioned. It is a portable, isolated (!) oscilloscope, that also can be used as a multimeter. A multimeter only is useless if you have to watch waveforms. Keep the scopemeter and buy an additional multimeter, if you need more accuracy or functions as continuity beeper, capacitance, temperature etc. PS: additional static lines on LCD is probably a contact problem between PCB and LCD. Can you show a photo? |
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