KYORITSU 4120A - Manual (Page 2)

CONTENTS
1. SAFE TESTING .............................................................................. 1
2. PROCEDURE OF REMOVING COVER ......................................... 3
3. FEATURES ...................................................................................... 4
3.1 Instrument Layout .................................................................... 4
3.2 Test Lead .................................................................................. 5
3.3 Features ................................................................................... 5
4. SPECIFICATIONS .......................................................................... 7
5. OPERATING INSTRUCTIONS ....................................................... 8
5.1 Initial Checks ............................................................................. 8
5.2 Measurement of the Loop Impedance ...................................... 9
5.3 Measurement of Prospective Short Circuit Current ................. 10
6. DETAILED EXPLANATION ........................................................... 10
6.1 Measurement of Fault Loop Impedance and
Prospective Fault Current ....................................................... 10
6.2 Measurement of OLD-TT System ............................................ 15
6.3 Measurement of Line Impedance and
Prospective Short Circuit Current ............................................ 16
7. SERVICING ................................................................................... 17
8. CASE AND STRAP BELT ASSEMBLY ......................................... 17