Dear Customer,
Thank you for choosing a Hanna Instruments Product .
Please read this instruction manual carefully before using this
instrument . This manual will provide you with the necessary
information for the correct use of this instrument, as well
as a precise idea of its versatility .
If you need additional technical information, do not hesitate
to e-mail us at tech@hannainst .com or view our worldwide
contact list at www .hannainst .com .
MODEL IDENTIFICATION
The models HI504XYZ-α are pH/ORP controllers .
The meaning of the last letters is according to the follow-
ing scheme:
All rights are reserved . Reproduction in whole or in part is prohibited without the
written consent of the copyright owner .
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