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7-3. How to clean
Clean the purity meter if it becomes extremely dirty. The purity meter must be turned off while cleaning it.
Use a waste cloth or the like to remove dust. Do not use water or organic solvent for cleaning because they
may cause malfunctions.
NOTE
When the purity meter gets wet, water may remain in the buzzer sound opening or grooves. Drain
water as follows:
(1) Wipe away moisture on the purity meter thoroughly using a dry towel, cloth, etc.
(2) While holding the purity meter firmly, shake it about ten times with the buzzer sound opening facing
downward.
(3) Wipe away moisture coming out from the inside thoroughly using a towel, cloth, etc.
(4) Place the purity meter on a dry towel, cloth, etc. and let it stand at normal temperatures.
14.
CAUTION
When cleaning the purity meter, do not splash water over it or use organic solvents such as
alcohol, benzene, etc. on it. Otherwise, it may cause discoloration or damage to the surface of
the purity meter or a sensor failure.
