5TABLE OF CONTENTSCHAPTER 1- INTRODUCTION1.1 Preliminary examination ................................................................................ 81.2 Model identification ...................................................................................... 81.3 General description ...................................................................................... 91.4 Power supply .............................................................................................. 101.4.1 Batteries installation .............................................................................. 101.4.2 Recharging batteries ............................................................................. 101.5 Probe description & installation .................................................................... 111.5.1 D.O. sensor activation .......................................................................... 111.5.2 Installation ........................................................................................... 121.5.3 pH & pH/ORP sensors .......................................................................... 131.6 Specifications ............................................................................................. 141.7 Display & keyboard description ..................................................................... 181.8 Help function ............................................................................................. 19CHAPTER 2 - MEASUREMENT MODE2.1 Procedure ................................................................................................. 20CHAPTER 3 - SYSTEM SETUP3.1 Measurement setup ..................................................................................... 213.2 System setup .............................................................................................. 233.3 Table of measurement & setup items .............................................................. 27CHAPTER 4 - CALIBRATION MODE4.1 Quick calibration ....................................................................................... 294.2 pH calibration ............................................................................................ 314.2.1 Preparation ......................................................................................... 314.2.2 Procedure ............................................................................................ 324.2.3 Error list .............................................................................................. 334.3 Dissolved oxygen calibration ........................................................................ 344.3.1 Procedure ............................................................................................ 34