I watched someone doing a setup where three different digital scales were used and none of the scales agreed (the user averages the readings). None of the scales were low-cost models, one was a Win scale that is made for cartridge setup and costed about $900 more than 15 years ago.
I don't know what to make of this. I use an outrigger that rests on the scale which has an attachment that can be set at different heights so that the measurement is taken at the level of the record. This also means that the cartridge is never close to the scale itself (the outrigger is acrylic). I don't know if this improves accuracy, but, it certainly removes issues involving magnetic attraction of the cartridge to components in the scale, and incorrect readings from the cartridge being at the wrong position (height) when the measurement is taken.
I don't know what to make of this. I use an outrigger that rests on the scale which has an attachment that can be set at different heights so that the measurement is taken at the level of the record. This also means that the cartridge is never close to the scale itself (the outrigger is acrylic). I don't know if this improves accuracy, but, it certainly removes issues involving magnetic attraction of the cartridge to components in the scale, and incorrect readings from the cartridge being at the wrong position (height) when the measurement is taken.