08-10-2009 01:02 PM
08-11-2009 06:32 AM
Why measure the voltage on both resistors?
Build your voltage divider and take into account:
- Input impedance. If you measure AC parts you will need an additional (tuneable) capacitor
- Thermal drift , use resistors of same tco and mount them close ( Vishay VD200 is nice 🙂
Now use an appropriate power supply and calibrate your voltage divider as part of the system.