Hi all! I'm an electrician, so I don't need super accurate test instruments like some of you do, but I would like to get the best product for my money. I've been looking at clamp meters and I noticed that of the two types, the ones that only read AC amps seem to have better accuracy ratings over the ones that read both AC and DC amps. From my research, I understand that to get a DC current reading, you have to measure the Hall effect, whereas with AC all you need is a CT to measure the magnetic field. None of the meters I've looked at specify what's in the clamp. They're all rated for TRMS.
So here's my quandary. Given two similar meters (with a $100 price difference...), a cheaper one that measures only ACA with 1% ±10d or one that measures ACA/DCA with 2% ±10d for the ACA readings, should I be willing to give up accuracy just to have the ability to measure DCA? Can someone help me understand what's causing the loss of accuracy when the ability to read DCA is incorporated into a meter?
Thanks