This compact hand held RCD tester is designed for professional use to obtain accurate values of 'Trip Time' with the selection on a dial switch of the trip current. Resistors are used to pass the trip current between earth and active therefore a correction factor in percentage is available on the display for adjustment according to the line voltage. The trip time is measured to a maximum of 3.000 seconds, while the fault current is selectable on a range from 3 to 500mA. The unit has been designed for ease of operation whilst maintaining safety, reliability and accuracy. Features Residual Current Device (RCD) or ELCB trip time tester with LED indication for power, battery and mains polarity Simply select earth leakage resistance test value Displays adjustment percentage for high and low voltage Suitable for 10A and 30 mA RCDs Three basic tests Wiring test Line Voltage to Earth Tripping time Menu driven and easy to use LED wiring check function to check wiring prior to test Test angle selection - 0 or 180° Dynamic battery check Microprocessor controlled Tough rugged meter, designed to give accurate measurements in harsh environments To complete the test: Connect the unit and check that the LED display indicates the wiring is correct Check that the line voltage is within tolerance Set the trip current on the selector and hit the test button Once the test is complete, the operator can view the following on the LDC display: Circuit voltage Percentage error current (from nominal voltage)* Disconnection time Polarity at opening Over Temperature Protection