A very important instrument for checking & monitoring presence of OPEN PHASE and PHASE SEQUENCE thru the designated LEDs and an audible buzzer sound simultaneously. The unit comes with interchangeable crock clips, but any type of probe can be used plus a protective carrying case to keep your testing in great condition. Testing is as easy as connecting the included well insulated alligator clips of the unit to the three phase circuit under test and the unit will indicate the presence of open phase & pahse sequence thru the LEDs and buzzer. Special Features * Check the presence of open phase and phase sequence condition * Fast and accurate measurement * Portable and compact design * Checks open phases & Identifies 3 phase sequence condition * With simultaceous indications via LEDs and audible buzzer sound * Indicates direction of the rotation Specifications * Operation Voltage : 60V - 600V AC, three phase * Limit Support Voltage : 2000 V/min * Operating Frequency Range : 20 Hz - 400 Hz * Limit Time for Continuous Use: * 60 minutes maximum at 60V AC * 4 minutes maximum at 600V AC * Test Leads : Double insulation * Length of test leads : approx. 1 meter long * Item dimension : approx. 64 (L) x 85 (W) x 23 (D) mm (2.5 x 3.2 x 0.9" inch) * Item weight : approx. 200g One Set Includes * 1 x Main unit with Test leads and alligator clips * 1 x Instruction Manual * 1 x Blue carrying pouch * Standard factory package