1.3
SECTION 1. GENERAL DESCRIPTION
1.1 INTRODUCTION
This manual provides descriptive information, installation and maintenance instructions for the
Servomex 1100A and 1100H Oxygen Analysers. Unless stated otherwise references to the
1100A include the 1100H. Comprehensive parts lists are included, also descriptive
information covering optional plug-in modules and variants to the basic instrument which
extend the range and capabilities.
It is divided into the following sections:
Section 1. General description of the analyser, its operating principle and options
Section 2. Installation of the analyser and user connections.
Section 3. Operating instructions.
Section 4. Routine maintenance.
Section 5. Fault diagnosis and repair.
Section 6. Parts lists for the analyser and sampling systems.
The appendices at the back of the manual contain details of safety certification for hazardous
area use, specification and other background information.
The Servomex model 1100A Analyser is a microprocessor controlled, paramagnetic
process oxygen analyser incorporating the magneto-dynamic measuring cell of proven service,
manufactured by Servomex for many years.
In its basic form the instrument comprises two units:
1. A Transducer unit which contains the measuring cell, heaters and the mechanical zero
adjustment.
Three different Transducer units are used depending on application:
a. Model 1131, certified for Zone 2 installation.
b. Model 1133, certified for Zone 1 installation.
c. Model 1132 certified for Zone 1 installation, operating at 110°C, for the
measurement of gas samples which have a high dewpoint, and used in 1100H
systems.
2. A Control unit, model 1101, which processes the signal from the Transducer unit to
provide:
a. A digital display.
b. An electrical current output.
This unit also provides the power supplies for the Transducer.
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