Author Topic: VOLTCRAFT VC850 no measurement  (Read 838 times)

0 Members and 1 Guest are viewing this topic.

Offline beymaTopic starter

  • Newbie
  • 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?? OPAMPów 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?.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf