Memo
Contents
1. Safety warnings ................................................................................... 1
2. Features ............................................................................................... 7
3. Specifications ....................................................................................... 9
4. Name of parts .................................................................................... 14
5. Accessories ........................................................................................ 19
6. Preparations for measurement .......................................................... 21
6-1 Battery voltage check ................................................................... 21
6-2 Attaching metal tip/ adapter to test leads ...................................... 21
7. Insulation resistance measurement on PV systems .......................... 23
7-1 Measuring method ........................................................................ 25
8. Insulation resistance measurement ................................................... 31
8-1 Measuring method ........................................................................ 32
9. Earth resistance measurement .......................................................... 36
9-1 Measurement principle ................................................................. 36
9-2 Simplified measurement ............................................................... 37
9-3 Precision measurement (with MODEL7228A test leads) .............. 40
10. Voltage measurement ...................................................................... 44
10-1 Measuring method ...................................................................... 44
11. Alarm function .................................................................................. 46
11-1 Alarm function ............................................................................. 46
11-2 How to set alarm ......................................................................... 46
11-3 Display example – Alarm setting ................................................. 48
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