Yamato Scientific Vacuum controller Vacuum controller - Manual (Page 8)

6
Warning Warning Warning Warning
Do not use the unit in an area where there is flammable or explosive gas.
•
Never use the unit in an area where there is flammable or explosive gas. The unit is not explosion-
proof. An arc may be generated when the power switch is turned ON or OFF, and fire/explosion may
result.
Always ground the unit.
•
Connect VR100’s power plug to a receptacle with grounding connectors.
•
Do not forget to ground VR100, to protect you and the unit from electrical shock in case of power surge.
Choose a receptacle with grounding connectors as often as possible.
•
Do not connect the grounding wire to a gas pipe, or by means of a lightning rod or telephone line. A fire
or electrical shock will occur.
•
If only bipolar receptacles are available for
VR100, connect an optional grounding
adapter to VR100’s power plug. Check
the polarity of the receptacle before
connecting the adapter to the receptacle.
Connect the adapter’s grounding wire
(green) to a grounding terminal to the
power supply. Contact our sales
representative in your vicinity or our service
center for additional information or
assistance.
100V receptacle with grounding terminals
Power plug
100V bipolar receptacle
Grounding wire