Voltmeter Schaltplan. Die eichung selbst geschieht wie bei allen vtm dieser bauart z b. J1 near the terminals is used to short the voltage input and supply voltage vcc to be the same.
The voltmeter can also be configured to measure different voltage ranges and display higher voltage resolution. Use 10k potentiometer to set the reference voltage between pin 35 and pin 36 of the icl7107 ic to 1v. Heathkit 309 c rf probe heathkit 336 hv probe heathkit 337 c demodulator probe heathkit 342 low capacity probe heathkit 2006 technician heathkit 2007 general heathkit 2008 extra heathkit a 7e amp schematic diagram heathkit a 9a amp schematic diagram heathkita9c heathkit a 9c integrated amp schem.
There are total 4 pcb jumpers on the board.
Dsn dvm 368 voltmeter module schematic it has three terminals. One voltage input for measuring one supply voltage and a ground. Therefore if you short j1 you can use just two wires for measuring a voltage. There is over sampling applied in multimeter software so measuring resolution is the same in fine and coarse circuit and is 10mv.
