This tester is used to perform earth continuity tests required for class-I devices for various safety standards, including the IEC, EN, VDE, BS, JIS, UL, and the Electrical Appliance and Material Control Law of Japan. The tester must be used under the following conditions: Test current value: 3A to 30 A AC Output terminal voltage: 5.4 V or less Resistance value: 1.2 Ω or less Maximum power: 150 VA or less 1. Making test current constant The test current for earth continuity tests has been made constant. This relieves the operator of the burdensome procedure of resetting the test current when the resistance of the DUT (Device Under Test) changes. 2. Safety output voltage The constant current/constant voltage circuit provides fast response, preventing generation of excessive output voltage even when output is interrupted during testing. The tester complies with the limitations on no-load output voltages (6 V or less, 12 V or less, and so on) required by many safety standards. 4. Compact and lightweight A new high-efficiency power supply (achieving a power conversion efficiency of 65%) and large output (150 VA) makes possible a tester that is remarkably compact and lightweight, about half the size and weight of our conventional testers. 5. Excellent measurement accuracy The tester is equipped with an ammeter of +/-(1 % of reading + 0,2 A), a voltmeter of +/“(1 % of reading + 0.02V), and an ohmmeter of +/-(2% of reading + 0.003 Ω) that calculates resistance values based on measured current and voltage. 6. Offset canceling function The tester has an offset canceling function that cancels values for contact resistance at alligator-clip connections or other connecting points, resistance components, and the contact resistance of measuring leads in measurements using two terminals. 7. Contact check function The tester is provided with a contact check function that verifies the connection of the DUT (by current detection) before initiating testing. 8. Simple operations Tester functions are fast and easily controlled, with an intuitive control method that's easy to pick up, even for first-time users. For example, test conditions are set simply by selecting an item displayed on the LCD with the cursor keys and turning the rotary knob to set/select a value. Function keys allow you to set shortcuts to a desired setting item. 9. Stores up to 100 types of test conditions The tester allows you to store and name up to 100 test conditions involving parameters such as test current, determined resistance value, and test time. For example, you can store test conditions for a specific safety standard under the name of the standard, or store test conditions under the name of the destination of the DUT. When test conditions need to be modified due to changes in the destination of the product or revised safety standards, you can recall a set of test conditions simply by entering a memory number, making necessary modifications to the pre-existing standard. Assigning specific names allows test conditions to called up by name. This function is available through both the front panel and the remote control. 10. Programming of test conditions A combination of stored test conditions allows automatic execution of tests consisting of several programs of up to 100 steps each. Although the total number of steps is limited to 500, 100 types of programs can be stored and recalled from the front panel or the remote control.