I needed a 50A current meter for the 1800W induction heater ( https://highvoltageforum.net/index.php?topic=530.0 ), but had none with the proper scaling. I do however have a large box of Kyoritsu KM-66 1 mA blank scale meters, so I decided to do a video on the following topics:
- Learn how to calculate the shunt resistor for your analog panel meter
- Guesstimate the internal resistance of a unknown meter
- Design custom scales if you have a blank meter or want to use a meter for another purpose than its original.
Link to scale-o-matic: http://stiftsbogtrykkeriet.dk/~mcs/Scale.html
Link to Meter from Tonne software: http://www.tonnesoftware.com/meter2.html