User Guide

2
Dear Customer,
Thank you for choosing a Hanna Instruments
Product.
Please read this instruction manual carefully
before using the instrument.
This manual will provide you with all the
necessary information for the correct use of
the instrument, as well as a precise idea of its
versatility in a wide range of applications.
These instruments are in compliance with the
directives.
TABLE OF CONTENTS
General Description ..................................... 3
Preliminary Examination ............................. 3
LCD Display Functional Description ............ 5
Functional Description HI 9624 & HI 96240 ... 6
Specifications HI 9624 & HI 96240 ............... 7
Functional Description HI 9625 & HI 96250 ... 8
Specifications HI 9625 & HI 96250 ............... 9
Operational Guide ..................................... 10
pH Calibration ........................................... 21
pH Values at Various Temperature ............. 27
Temperature and mV Calibration ................ 28
RS232C Output (HI96240 & HI96250) ....... 29
Electrode Conditioning and Maintenance ... 32
Battery Replacement ................................ 36
Troubleshooting Guide ............................... 38
Temperature-Resistance Correlation for
HANNA pH Sensitive Glass....................... 39
Accessories .............................................. 41
Electrode Application Reference Guide ..... 49
Warranty ................................................... 50
CE Declaration of Conformity .................... 51