RKI Instruments GD-K71D - Manual (Page 18)

PT2E-1052
17
４−４．Grounding
Make grounding with inside or outside terminals marked Ｅ
Be sure to make grounding before putting power ON.
WARNING
！
Bolt for earth
Bolt for earth
Be sure to make grounding for safety purpose and to keep stable operation
of this unit. Do not connect each wire with gas pipe. Make grounding
corresponding to D-class grounding (Grounding resistance : below 100 ohms