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Teardown 121GW DMM

Jan Cumps over 3 years ago

The inside of an EEVBlog 121GW 4 4/5 digit multimeter. Just to see how it's built.

The PCB, both sides:

Housing and boot:

Links:

Manual
Schematic

.

Top Replies

navadeepganeshu over 3 years ago +4

Owww,...first pic surprised me!! Very dense board and cool to see that Bluetooth chip in there. The display has a quite robust cover. Those were exactly the weak point of those cheap "yellow multimeter…
cheetat over 3 years ago +4

1) Not too sure whether the schematic is up to date. I could see "Bluetooth Module(Not used)" stated in the schematic while the board clearly shows the BLE module is attached to the multimeter. BLE112…
Jan Cumps over 3 years ago in reply to shabaz +3

shabaz said: except the long pointy attachments are excessively long, and hard to use on the end of the already-long main probe body. I read in Pomona's datasheet that "Extended slide on tip adapter…

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navadeepganeshu over 3 years ago

Owww,...first pic surprised me!!

Very dense board and cool to see that Bluetooth chip in there. The display has a quite robust cover. Those were exactly the weak point of those cheap "yellow multimeter" which I used to have.
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navadeepganeshu over 3 years ago

Owww,...first pic surprised me!!

Very dense board and cool to see that Bluetooth chip in there. The display has a quite robust cover. Those were exactly the weak point of those cheap "yellow multimeter" which I used to have.
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