Teledyne 356WA instruction manual Trace Oxygen Analyzer Introduction, Method of Operation

Trace Oxygen Analyzer Introduction 1

Introduction

The Teledyne Analytical Instruments Model 356WA Trace Oxygen Analyzer is designed to detect oxygen concentrations in process streams. It utilizes Teledyne’s patented electrochemical sensor which requires minimal maintenance and exhibits a 90% response in less than one minute. Cell output is insensitive to flow rate changes within the operating range of the analyzer’s flowmeter.

The Model 356WA features a welded stainless sampling system for long-term, leak-free operation.

While the analyzer is offered in several configurations, they are virtually identical with the exception of housing or options such as special meters. For purposes of clarity, this manual will discuss the unit in general. The differ- ences between the configurations are minor and will be obvious to the user.

1.1Method of Operation

Gas from the process stream is fed through a sample line to the sample inlet port of the analyzer. The sample is directed through the analyzer’s sample system, where oxygen concentration is detected by the sensor. The sensor generates an output signal which is read out on a suitable recorder or meter.

The analyzer components include:

•A throttle valve and flowmeter to control sample flow

•A humidifier to condition the sample

•The measuring cell where catalytic conversion occurs

•An electronic amplifier circuit for converting the output of the cell to a DC signal.

•A thermostatic assembly for temperature control in the cell compartment

•A reservoir for providing make-up water to the humidifier.

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