– 2 –
Metal plate
(of Al. stainless steel, etc.)
Working table
Resistor 1MΩ
(1/2W)
Earth wire
Staple
Bare copper wire
(for body earth)
Fig. 3 Grounding of the working table
(6) Use a three wire type soldering iron including a grounding wire.
Use a high insulation mode (100V, 10MΩ or higher) when ordinary iron is to be used.
(7) In checking circuits for maintenance, inspection, or some others, be careful not to have the test probes
of the measuring instrument shortcircuit a load circuit or the like.
Soldering iron
Grounding wire
Screw stop at the screwed
part using a rag plate
Fig. 4 Grounding a solder iron
➤
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