In electrical wiring and electronic circuits, a ground is zero-voltage connection that is used as a fail-safe to prevent electrical surges that can damage components or even start fires in the case of large appliances. Impedance is the ground's resistance, or its ability to block or stop a power surge. Portable devices known as ground testers are used to test the impedance of electrical grounds. Testing the impedance of a ground can be done in approximately five minutes with one of these ground impedance testers.
Instructions
1. Press the power button on the front panel of the tester to the "on" position. Wait until the "ready" light comes on to proceed with testing.
2. Choose whether you want to run a 25-amp or 30-amp test by hitting the corresponding test selection button.
3. Insert the plug of the item you will be testing into the plug slot on the right-hand side of the tester's front panel.
4. Attach the tester's return lead to the body of the item you will be testing the ground on.
5. Press the tester's "start test" button and then view the results on the display screen. The "pass test" light will light up if the object's ground impedance is adequate or not surpassing 0.1 Ohms.
Tags: front panel, ground impedance, item will, item will testing, will testing