Products > Test Equipment

Hioki 3237 5.5 digits meter teardown

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fzabkar:

--- Quote from: coromonadalix on October 29, 2023, 01:58:03 am ---Eeprom i think  :  8 pins Soic    3771    if someone find a datasheet ???  i could try to read it ?
                                              0026     
                                                343
--- End quote ---

MB3771 power supply monitor:
https://www.mouser.com/datasheet/2/100/002-08511_MB3771_Power_Supply_Monitor-931495.pdf

coromonadalix:
could be that one   THKS

if it is, i dont see on the pcb  where the calibrations would be stored, unless it's directly in the mcu ????

 :-+

fzabkar:
H8S/2138 Group, H8S/2134 Group,
H8S/2138F-ZTAT™, H8S/2134F-ZTAT™,
H8S/2132F-ZTAT™
Hardware Manual
Renesas 16-Bit Single-Chip Microcomputer
H8S Family/H8S/2100 Series

https://www.renesas.com/document/man/h8s2138-group-h8s2134-group-h8s2138f-ztat-h8s2134f-ztat-h8s2132f-ztat-hardware-manual

I think I can see a NiCad (?) battery on the PCB. Maybe the settings are stored in RAM???

coromonadalix:
no sorry  loll  the green one is a capacitor ... or a mov  due to its thickness,  but an input part  you see a line of resistors / voltage divider

and the black round thing 5A1 marking is the buzzer, had to put a tape on it,  very loud    loll

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