Teledyne Model 300EU Introduction, Reference Numbering Convention, 1.2. M300EU OVERVIEW, Rev A

M300EU	INTRODUCTION
Addendum to M300EU Manual - P/N 04288

1.INTRODUCTION

This addendum is based on the M300E/EM Operators Manual (P/N 04288). It is intended as a supplement to the M300E/EM manual (P/N 04288) and provides an overview of the instrument operation and specific details regarding those areas where the M300EU is different in design or operating method from the M300E.

In most ways the M300EU is identical to the M300E/EM in design and operation, therefore most of the basic set up information, operating instructions as well as calibration, maintenance, troubleshooting and repair methods are the same and can be found in the M300E/EM manual (P/N 04288).

1.1. REFERENCE NUMBERING CONVENTION

Unless otherwise specified, chapter, section, figure and table reference numbers referred to within this text are relative to this document.

•EXAMPLE: “Table 2-1”refers to the figure, within this document, labeled as 2-1.

•Additionally, in the electronic version(s) of this manual references internal to this document will be active links to that section, figure or table.

References to chapters, sections, figures and tables in the original document will be labeled as such and will not be an active link.

•EXAMPLE: “Figure 6.1 of the M300E/EM Operators Manual (P/N 04288)”.

1.2. M300EU OVERVIEW

NOTE

The information contained in this addendum is relevant to M300EU analyzers running: SOFTWARE REVISION K.6. Some or all of the information may not be applicable to earlier or later revisions of software.

The software revision your analyzer is running is displayed in the upper left-hand corner of the display

any time the instrument is in SETUP mode.

The model 300EU is a close derivative of the M300E/EM CO Analyzer, however its higher sensitivity require some changes its design and operation.

The primary differences between the M300EU and the M300E/EM analyzers are:

•INTERFERENT REJECTION: Periodically the sample gas stream is routed through an internal CO scrubber allowing the instrument to make a measurement of the sample gas completely free of CO; the measurement made during this auto-reference period (A-REF) is subtracted from the sample concentration measurement. This corrects for instrument drift, ambient temperature changes and changing CO2 levels in the sample gas.

•OPERATING METHOD: An additional operating mode is added allowing the user to manipulate several parameters associated with the A-REFmeasurement cycle.

•SAMPLE GAS CONDITIONING: A Nafion→ drier is used to dry the sample and alleviate any effects from humidity changes in the sample gas.

•IR OPTICS: The objective and field mirrors on the optical bench are gold plated. This maximizes their reflectivity and increasing the amount of IR light reaching the detector and improving the optical bench’s signal-to-noise performance.

•PNEUMATIC OPERATION: The flow rate is higher. It has a 1.8 LPM nominal flow rate. The flow sensor is rated to 6 LPM.

•MECHANICAL DESIGN: The optical bench is placed in a temperature-controlled, convection-heated oven. This dramatically reduces instrument noise and temperature related drift.

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