Table Of Contents - Hach 8450 Instrument Manual

Safety Precautions .................................................................................................................................................... 6
Specifications ............................................................................................................................................................ 7
Section 1 Introduction
1.1 Introducing the Sigma Residual Chlorine Monitor Model 8450 ........................................................................... 9
1.2 Overview of Chlorine Characteristics .................................................................................................................. 9
1.2.1 Free Chlorine ............................................................................................................................................. 9
1.2.2 Probe Response and Effects of pH ........................................................................................................... 9
Section 2 Installation
......................................................................................................................................... 11
2.1 Overview ........................................................................................................................................................... 11
2.2 Monitor Mounting .............................................................................................................................................. 11
2.2.1 Wall Mounting .......................................................................................................................................... 11
2.3 Panel Mounting the 8450 .................................................................................................................................. 12
2.3.1 Panel Mounting Considerations............................................................................................................... 12
2.3.2 Panel Mounting Sequence....................................................................................................................... 12
2.4 Rail-Mount Mounting ......................................................................................................................................... 14
2.5 Probe Mounting................................................................................................................................................. 14
2.5.1 Submerged Probe Mounting.................................................................................................................... 14
2.5.2 Flow Cell Mounting .................................................................................................................................. 14
2.6 Electrical Connections ...................................................................................................................................... 16
2.6.1 ac Power .................................................................................................................................................. 16
2.6.2 Relay (Alarms) and Output Connections ................................................................................................. 17
2.6.3 Connecting the Probe.............................................................................................................................. 17
2.7 4-20 mA Surge Protector .................................................................................................................................. 18
2.7.1 Connections and Setup ........................................................................................................................... 19
2.7.2 Test and Check Procedure ...................................................................................................................... 20
2.7.3 4-20 mA Device Connection .................................................................................................................... 20
2.8 Data Communications....................................................................................................................................... 21
2.8.1 RS232 Communications.......................................................................................................................... 21
2.9 RS485 Communications ................................................................................................................................... 23
2.10 Probe Preparation ........................................................................................................................................... 24
2.11 New Membrane Pre-qualification Testing........................................................................................................ 24
2.12 Probe Preparation Procedure ......................................................................................................................... 25
Section 3 Operation
........................................................................................................................................... 27
3.1 Overview ........................................................................................................................................................... 27
3.2 Front Panel Display and Controls...................................................................................................................... 27
3.3 Menus and Parameters ..................................................................................................................................... 28
3.3.1 Main Screen ............................................................................................................................................ 28
3.3.2 Main Menu............................................................................................................................................... 28
3.4 Accessing and Changing System Parameters .................................................................................................. 28
3.4.1 Function Icon ........................................................................................................................................... 28
3.4.2 Arrow Icons.............................................................................................................................................. 29
3.4.3 Enter/Exit Icon ........................................................................................................................................ 29
3.5 Factory Default Parameters .............................................................................................................................. 30
3.6 Adjusting Display Screen's Contrast ................................................................................................................. 30
16116TOC.fm
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Table of Contents

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