YOKOGAWA Australia has released the 30031 clamp-on leakage current tester, capable of measuring currents as low as 1mA with a resolution of 0.001mA. It is suitable for checking the insulation of low-voltage circuit and electrical components.
It can be used as an adjunct to portable appliance testers not fitted with a leakage current function to enable testing to AS/NZS 3760-2003 requirements. This is useful for performing current leakage tests on appliances such as office equipment, computers and power tools. Unless connected to the mains these appliances cannot have the electrically active part switched to the on state.
The tester uses an electrical compensation circuit that corrects for any mechanical or assembly variations in the clamp sensor, reducing the influence of external magnetic fields to one fifth that of conventional leakage current clamps.
The 30031 covers the ranges of 3mA-30mA and 30A-60A with an accuracy of 1% +5 counts from 0A-50A. It has a jaw opening of 40mm and conforms to EN 61010-1 and EN 61010-2-032 (CAT III 300V, pollution degree 2).