Hey Guys, I'm not sure the correct procedure for comounding errors using some test equipment. I'm trying to measure electrical current using a fluke meter and a fluke current clamp. Here are the two devices I'm using specifically: Fluke Power Analyzer Model 437 Series 2 Fluke i5sPQ3 AC Current Clamp Here is where it is confusing. The Fluke meter has an accuracy spec as well as the current clamp. For instance, the meter says in the range 0.5 - 200A, the accuracy is 0.5% + 5 counts. The clamp says the accuracy is 1% + 5mA in the range of 10mA - 1A. What is the appropriate way to combine these two accuracies to establish a single accuracy? I would think to add them, but I've seen some people that seem to take an average, using a RMS-type formula. Any suggestions?