The Leakage Test measures the current that would result from the ground conductor being accidentally severed; that is the current to which the operator would be subjected if providing a path to ground at normal line voltage. A switch is provided to select testing at normal or reverse polarity. Measurements from 0 to 10 mA are indicated on a large, 3.5-in. (89 mm) analog meter with sensitivity greater than 0.01 mA. To ensure the accuracy of the meter, a calibration check can be initiated at the push of a button.