User guide

1．Safe testing ...................................................................................... 1
2．Procedure of removing cover ........................................................... 3
2．1 Method of removing the cover .................................................. 3
2．2 Method of storing the cover ...................................................... 3
3．Product summary and explanation ...................................................4
3．1 Product summary .................................................................... 4
3．2Test range ............................................................................... 4
3．3 Features ................................................................................. 5
3．4 Instrument layout .................................................................... 5
3．5 Optional accessory ................................................................. 7
3．6 Explanation for indications and buzzer ................................... 8
3．6-1 DISPLAY ................................................................................. 8
3．6-2 LED for threshold value indication and buzzer ....................... 8
3．7 Applicable standards .............................................................. 8
4．Specification .................................................................................... 9
5．Preparation before a measurement ............................................... 11
5．1Visual inspection ................................................................... 11
5．2 Connection to mains power supply ....................................... 11
5．2-1 Connection of mains cord ..................................................... 11
5．2-2 Check the mains power supply voltage ................................ 12
5．2-3 How to use M-7121 (Optional cord) ...................................... 12
5．2-4 NULL setting (Protective conductor resistance range) .......... 13
6．Connection for the instrument and the device under test .............. 14
7．Measuring method ......................................................................... 15
7．1 Measuring protective conductor resistance (RPE) ............... 15
7．2 Measuring insulation resistance (RINS) ............................... 16
7．3 Measuring equivalent leakage current (IEL) ......................... 17
7．4 Measuring contact current (IL) .............................................. 18
7．5 Measuring current consumption……… Only for M-6202 ...... 19
8．Fuse replacement .......................................................................... 20
9．Services ......................................................................................... 21
10．Case and strap assembly ...............................................................21
CONTENTS