When it comes to testing equipment it can be easy to get lost in the latest and greatest technology. For ground resistance testing, sometimes less is more. The AEMC 3620-150 3-Point Ground Resistance Tester happens to be one of these testers. This ground resistance tester has a large analog display that shows direct readings from 0.5 to 1000 ohms. There is also a manual zero adjustment to increase the accuracy of your readings. Looking at the AEMC 3620 you can see there is very little to set up.