Author Topic: VOLTCRAFT VC850 no measurement  (Read 261 times)

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Offline beyma

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  • Posts: 1
  • Country: pl
VOLTCRAFT VC850 no measurement
« on: December 08, 2017, 10:17:37 pm »
Hello

The meter is based on the FS9922-DMM4 system and a large number of 062C opamp, one AD737J and HEF4070.
The WARNING message keeps flashing all the time and displays only zero - no measurement. On the inputs after setting to OHMY there is a voltage of about 1.4V, that is, the system probably works from the input to the switch.
Due to the large amount of OPAMPs, I do not know how to do it, and it would be useful for me to get a grip on it, or someone who has already processed such a topic or meter.

I greet all readers and thank you for all the help.


Witam

Miernik zbudowany jest na uk?adzie FS9922-DMM4 oraz du?ej ilo?ci opamp 062C, jednego AD737J i HEF4070.
W mierniku ca?y czas miga napis WARNING oraz wy?wietla same zera - brak jakiegokolwiek pomiaru. Na wej?ciach po ustawieniu na OHMY jest napi?cie ok 1.4V czyli od wej?cia do prze??cznika uk?ad chyba dzia?a.
Ze wzgl?du na du?? ilo?? OPAMPĆ³w troszk? nie wiem jak si? za to zabra? i w?a?nie przyda? by mi si? schemat by to ogarn?? b?d? kogo? kto ju? przerabia? taki temat czy miernik.

Pozdrawiam wszystkich czytaj?cych i za wszelk? pomoc dzi?kuj?.
 


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