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In order to maintain safety of operation and good condition for the equipment, please note the
following issues for care not only before and during but after operation.
Securely ground the control unit.
It is one of the most basic provisions for safety to ground the control unit, as grounding for the
spray gun is also accomplished by grounding the control unit.
The object to be coated must be grounded.
The grounding resistance for the object should not exceed 1M ohm. (Resistance
measurement voltage to be 500V minimum) Objects can be normally grounded through
hangers and conveyors but excessive dried paint on hangers may degrade their conductivity
and allow electrostatic accumulation of a charge on the part which sometimes leads to
discharge a spark and a possible resultant fire. To prevent these dangers, hangers should be
cleaned regularly to remove dried paint that can act as an insulator.
All conductive articles in the spray booth must be grounded.
In the spray booth, high voltage may ionize the air around the coating equipment, which has
a danger of electrostatic accumulation on any conductive materials that are not grounded,
resulting in a possibility of sparking. Apparatuses such as coating equipment mounting
stand and safety guards made of metal must be securely grounded. Also do not place any
paint containers or tools which are unnecessary in the booth. Even outside the booth, solvent
containers should be grounded if they are close to or near to booth entrance.
Handle coating equipment with bare hands.
Though the gun grip is grounded through the cable and control unit, wearing of
non-conductive gloves on hands means insulation of human body where electrostatic is
accumulated, creating a danger of electric shock when any part of the body touches a
grounded article. If wearing of gloves is necessary for any reason, the glove should have a
hole so that bare skin of the hand can contact the gun grip.
Be sure to wear leather soled or anti-electrostatic shoes.
As indicated above, air in the spray booth is ionized by electrostatic coating and can
accumulate energy in the human body which will discharge to ground. Operators and other
people who intend to get in the booth are to be neighboring area should put on
anti-electrostatic shoes for safety. Such shoes should be also regularly cleaned not to allow
excessive accumulation of paint or other dirt. Naturally, the floor of working area should be
conductive.
The working floor should have static charge preventive structure. The close
structure-painting booth should have this preventive structure for the entire floor; the open
structure-coating booth should have this preventive structure for the area having both sides
of 1.5m and the front side of 2.5m. These area should have a static charge preventive
structure of 1 M ohm, and should be clean.
Whenever it is necessary to clean or wash nozzles, switch off the power to the control unit
and touch the electrode in the gun head to any ground to discharge any residual high voltage
in the system during the nozzle cleaning.
7
Safety control
WARNING
