Hanna Instruments HI 93501 - Manual (Page 15)

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Hanna Instruments reserves the right to modify the design,
construction and appearance of its products without advance notice.
RECOMMENDATIONS FOR USERS
Before using these products, make sure they are entirely suitable for
the environment in which they are used.
Operation of these instruments in residential areas could cause
unacceptable interferences to radio and TV equipment, requiring the
operator to follow all necessary steps to correct interferences.
Any variation introduced by the user to the supplied equipment may
degrade the instruments’ EMC performance.
To avoid electrical shock, do not use these instruments when voltages
at the measurement surface exceed 24 VAC or 60 VDC.
To avoid damage or burns, do not perform any measurement in
microwave ovens.