RKI Instruments Digester Gas Monitor - Manual (Page 7)

Digester Gas Monitor Operator’s Manual Overview • 1
Chapter 1: Introduction
Overview
This chapter briefly describes the Digester Gas Monitor. This chapter also describes the
Digester Gas Monitor Operator’s Manual (this document). Table 1 at the end of this
chapter lists the specifications for the Digester Gas Monitor.
About the Digester Gas Monitor
The Digester Gas Monitor is a fixed-mounted, four channel gas monitor that detects
methane, oxygen, carbon dioxide, and hydrogen sulfide. All four sensors may not be
installed in all versions of the Digester Gas Monitor. Gas readings and other messages are
indicated on an LCD display. All user adjustable parameters may be accessed using the
control switches on the display PCB.
The Digester Gas Monitor is designed to monitor digester conditions in a corrosive
environment with high humidity and high levels of H
2
S. It requires compressed air to draw
in sample.
The Digester Gas Monitor includes audible and visual alarms that warn you of hazardous
gas conditions. The alarm circuits include up to three levels of gas alarms. The fail circuit
alerts you to failures in the Digester Gas Monitor.
The Digester Gas Monitor has two modes of operation. They are Normal Operation during
which all samples are taken and Calibration Mode that enables you to calibrate the
Digester Gas Monitor’s active channels. It also has four selection menus that allow you to
configure various Digester Gas Monitor channel and instrument parameters: the Global
Menu, Configuration Menu, Input Setup Menu, and Modbus Menu.
About this Manual
The Digester Gas Monitor Operator’s Manual is organized as follows:
• Chapter 1 is an introduction to the Digester Gas Monitor.
• Chapter 2 describes the components of the Digester Gas Monitor.
• Chapter 3 describes the installation and start-up procedures of the Digester Gas
Monitor.
• Chapter 4 describes the operation of the Digester Gas Monitor.
• Chapter 5 describes the Global Menu which allows you to set instrument parameters.
• Chapter 6 describes the Configuration Menu which allows you to set channel
parameters.
• Chapter 7 describes the Input Setup Menu which allows you to set the input type for
each channel.
• Chapter 8 describes Calibration Mode which allows you to calibrate the Digester Gas
Monitor’s active channels.
• Chapter 9 describes the Digester Gas Monitor’s RS-485 Modbus output.