Emerson 755A User Manual download pdf

Product Data Sheet

PDS 103-755A.A01

January, 2003

• Canadian Standards Association-certified

• High resolution LED digital display

• Ideal for oxygen purity measurement

• Small, rugged, shock-resistant sensing

unit

• Plug-in alarms/current output options

• Adjustable speed of response

• Barometric pressure compensation

Gaseous Oxygen Analyzer

Model 755A

The Model 755A gaseous oxygen analyzer from

Rosemount Analytical provides continuous measurement

of gaseous oxygen with the highest accuracy and

reliability. The heart of this instrument is a compact

paramagnetic sensing unit, designed to monitor a wide

variety of ranges for virtually every application.

FEATURES

The Model 755A gaseous oxygen analyzer uses the

physical paramagnetic measurement technique

exclusively. This method offers distinct operating

advantages over combination measurements, such as

thermal conductivity, thermal convection or chemical

reaction. Two advantages of this technique are:

(1) faster response and, (2) linear detector output.

The 755A continuously measures from 0 to 1% to 0 to

100% oxygen with a resolution of 0.1% fullscale.

Standard zero or suppressed zero is available with a

range span as narrow as 1% and a zero suppression as

large as 99%. Standard response time is 20 seconds.

In addition, the Model 755A includes an integral absolute

pressure compensation circuit. This provides the user

with an oxygen readout that is automatically corrected for

barometric pressure variations. (See General

Specifications.)

Housed in a NEMA-3R aluminum case, the analyzer is

available with options for dual alarms and 0 to 20 mA or

4 to 20 mA current output. All optional features can be

added at the factory or in the field with the simple addition

of plug-in circuit boards. The paramagnetic sensing

assembly is mounted on a platinum suspension for shock

resistance. This assembly is designed for ease of

maintenance and installation.

Visit our website at www.processanalytic.com

On-line ordering available.

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Summary of Contents

Page 1 - Gaseous Oxygen Analyzer

Product Data SheetPDS 103-755A.A01January, 2003• Canadian Standards Association-certified• High resolution LED digital display• Ideal for oxygen purit

Page 2 - ALARM SPECIFICATIONS

PRINCIPLE OF OPERATIONThe Model 755A measures the paramagneticsusceptibility of oxygen. This susceptibility is muchhigher than other common gases. W

Page 3 - GENERAL SPECIFICATIONS

Page 3GENERAL SPECIFICATIONSDigital Display: 0.00 to 100.00% oxygenOutput to Recorder: Any incremental span, selectable:0 to 1, 0 to 2, 0 to 5, 0 to

Page 4 - ORDERING INFORMATION

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they ar