Shimadzu IRAffinity-1, Instruction Manual

Page: 8 / 134

vi
IRAffinity-1
Measures for Preventing Static Electricity Accidents
WARNING
• Take thorough measures to prevent buildup of static electricity.
Static electricity could result in fire or explosion.
CAUTION
• The best way to prevent static electricity accidents is simply to prevent the occurrence and
accumulation of electro-static charges.
• It is important to combine multiple preventive measures.
• If large amounts of flammable solvents are collected in a large container, implement preventive
measures 1 to 5 below.
Preventive measure 1:
Use a metal container for the waste liquid which grounds the container. This will ensure that the electrical
charges of the container and liquids pass to the ground. Accessories for this measure:
• Be sure to ground the metal waste container properly. If the grounding wire is not properly
attached or connected to the ground, static electricity can build up in the metal container.
• Some metal containers have surfaces that are laminated or oxidized, and therefore do not
conduct electricity. After grounding the metal container, use a tester to make sure that electricity
is conducted to the ground.
• If the liquid to be drained into the waste liquid container is virtually non-conductive (10
− 10
S/m or
less), it will be necessary to add properly conductive (and therefore safe) liquid to the tank (This
conductive liquid may be added beforehand).
Preventive measure 2:
Cover the spaces between the tubing and the sides of the inlet and outlet openings of the waste container
(with caps or the like). This will prevent any sparks generated outside the container from getting inside.
Preventive measure 3:
Keep electro-statically charged objects, including the human body, away from the waste liquid container. To
prevent the electro-static charging of the human body, take the following precautions:
• Wear anti-static clothing and shoes.
• Ground the human body with anti-static wrist straps. (For safety, the wrist strap should be
connected to the ground using an intervening resistor of about 1 M Ω ).
• Spread anti-static matting or the like on the floor, to make the floor conductive.
• Persons who have not taken anti-static precautions should touch some grounded metal
component before coming near the waste liquid container, in order to ground the body and
clothing.
Preventive measure 4:
Use tubing with an inner diameter of at least 2 mm for a drain line with high flow rates.
• Air bubbles in liquid can multiply the electro-static charge by a factor of 20, 30 or more.
Periodically check the tubing connections for leaks.