Operating Instructions RF-2000
9
Fig.: Conditions which may cause accidents
1.6.2 Preventive Measures against Accidents
The principal preventive measure is the prevention of charging and storage of static
electricity among those items shown in Mechanism of Static Electrical Discharge
Accidents. The preventive measures are shown below. It is recommended to
exercise two or more measures simultaneously.
• Particularly when a large quantity of flammable solvent is held in a large vessel,
be sure to observe the preventive measures 1, 2, and 3.
Preventive measure 1.
Use metallic (conductive) waste liquid vessel which is well grounded. This releases
the charge of the waste liquid and vessel to ground.
• Be sure to ground the vessel properly. Disconnecting of grounding wire or poor
grounding defeat the purpose of using a metallic vessel.
• There are some metallic cans which have no conductivity due to an oxidized
coating or lacquer on their surface. Be sure to confirm the grounding of vessels by
a tester before application.
• When a liquid with almost no conductivity (of 10-10s/m or less) is discharged into
the vessel, it is necessary to mix it with another liquid with some conductivity. (The
other liquid can be placed in the vessel in advance.)
Preventive measure 2.
Minimize the clearance of both inlet and outlet of vessel to prevent flame from
entering the vessel.
• Use a cap with three holes for 18 liter and 4 liter cans.
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