Operating Instructions RF-2000
10
Fig.: Anti-static electricity measures for vessel
Preventive measure 3.
Do not approach the vessel with charged objects including the human body.
Charging prevention measures for human body
a) Prevention of charging of shoes and clothes
b) Grounding of human body
c) Make working floor conductive
Suitable products to be used for those measures a), b), and c) are available on the
market.
• When persons who use no charge prevention measures approach dangerous
sections, they have to be grounded beforehand. (For example, they should
contact grounded metal by hand.)
Preventive measure 4.
Use pipes with inner diameter of 2mm or more for waste liquid line for large flow
rates.
• Inclusion of bubbles in the tube may increase the amount of charging by ten times.
Check that there is no inclusion of air via tube joints.
Preventive measure 5.
When it is impossible to use a conductive vessel, use caution in the following points.
a) Set the vessel so that the pipe outlet will be placed below the liquid level in
the vessel. Or, dip a grounded metal (ex. pipe connected to the main body of
device) in the liquid. Please note: This method is not effective for liquid with
small conductivity (10-10s/m or less).
b) Use a vessel of the smallest possible capacity to minimize the damage by fire
if it should occur.
c) Prevent the room from being dry. Humidity of 65% or more has charge
prevention effects.
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