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| Fluke 123 Scopemeter and battery replacement |
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| dimani4:
Hey Michel, Thank you very much. Now the question about the NTC thermistor. As I understood the color code (which are identical to the resistor codes) begins from the bottom of the thermistor (from the legs) as shown here:https://www.farnell.com/datasheets/2792960.pdf (see page 2). There are 4 color bands from the bottom to the top: the top colour of the apex determines the tolerance of the resistance. So can you tell me please these colours from the bottom to the top? Thank you very much. |
| sorenkir:
Hi again, I am not sure of the coulours on the photo. The one I have used measures 12kOhms at room temperature (20°C). In another original BP120 I have, the colours are brown, black, orange, gold and it measures 10kOhms. Michel. |
| dimani4:
Michel. One more thing about the thermal fuse. Can you tell me please what voltage/current is? Maybe it's written in the wires or somewhere in the front panel? Thank you very much. |
| maki:
I have a dam question: will Fluke 123 work without battery pack? I’ve received it without battery pack, tried to power it with its original power supply – it won’t turn on. Any advice is appreciated. |
| mahi:
maki: Yes, the Fluke 120 series Scopemeters do work without a battery installed. Start by checking the power supply. According to the specifications the original PM8907 power supply is 15V / 300mA but mine reads about 20.4V without load (center pin negative). |
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