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Percent Oxygen Analyzer
OPERATING INSTRUCTIONS FOR
Model 3000PA
Percent Oxygen Analyzer
DANGER
HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS
MONITORING SYSTEM.
PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM.
HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MAY PER-
P/N M64573
SIST FOR A TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED.
08/06/99
ONLY AUTHORIZED PERSONNEL SHOULD CONDUCT MAINTENANCE AND/OR SERVICING.
BEFORE C
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Model 3000PA Copyright © 1999 Teledyne Analytical Instruments All Rights Reserved. No part of this manual may be reproduced, transmitted, tran- scribed, stored in a retrieval system, or translated into any other language or computer language in whole or in part, in any form or by any means, whether it be electronic, mechanical, magnetic, optical, manual, or otherwise, without the prior written consent of Teledyne Analytical Instruments, 16830 Chestnut Street, City of Industry, CA 91749-1580. Wa
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Percent Oxygen Analyzer Specific Model Information The instrument for which this manual was supplied may incorporate one or more options not included with the standard instrument. Commonly available options are listed below, with check boxes. Any that are incorporated in the instrument for which this manual is supplied are indicated by a check mark in the box. Instrument Serial Number _______________________ includes the following options: !! !!! 3000PA-C: In addition to all standard features,
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Model 3000PA Table of Contents 1 Introduction 1.1 Overview ........................................................................ 1-1 1.2 Typical Applications....................................................... 1-1 1.3 Main Features of the Analyzer ....................................... 1-1 1.4 Model Designations ....................................................... 1-2 1.5 Front Panel (Operator Interface) ..................................... 1-3 1.6 Recognizing Difference Between LCD &
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Percent Oxygen Analyzer 4.3.3.2 Installing or Changing the Password ............. 4-7 4.3.4 Logout .................................................................... 4-8 4.3.5 System Self-Diagnostic Test .................................. 4-9 4.3.6 Version Screen ...................................................... 4-9 4.4 The Zero and Span Functions ....................................... 4-10 4.4.1 Cell Failure ............................................................ 4-12 4.4.2 Span C
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Model 3000PA DANGER COMBUSTIBLE GAS USAGE WARNING This is a general purpose instrument designed for usage in a nonhazardous area. It is the customer's responsibility to ensure safety especially when combustible gases are being analyzed since the potential of gas leaks always exist. The customer should ensure that the principles of operating of this equipment is well understood by the user. Misuse of this product in any manner, tampering with its components, or unau- thorized substitution of an
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Percent Oxygen Analyzer Introduction 1 Introduction 1.1 Overview The Teledyne Analytical Instruments Model 3000PA Percent Oxygen Analyzer is a versatile microprocessor- based instrument for detecting the percentage of oxygen in a variety of background gases. This manual covers the Model 3000PA General Purpose flush-panel and/or rack-mount units only. These units are for indoor use in a nonhazardous environment. 1.2 Typical Applications A few typical applications of the Model 3000PA are: Moni
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1 Introduction Model 3000PA Advanced Micro-Fuel Cell, designed for percent oxygen analysis. Several options are available. Versatile analysis over a wide range of applications. Microprocessor based electronics: 8-bit CMOS microprocessor with 32 kB RAM and 128 kB ROM. Three user definable output ranges (from 0-1% through 0-100 %) allow best match to users process and equipment. Air-calibration range for convenient spanning at 20.9 %. Auto Ranging allows analyzer to automatically s
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Percent Oxygen Analyzer Introduction 1 All of the above options are available in combination. For example, the -C and -V options are combined as Model 3000PA-C-V. Figure 1-1: Model 3000PA Front Panel 1.5 Front Panel (Operator Interface) The standard 3000PA is housed in a rugged metal case with all controls and displays accessible from the front panel. See Figure 1-1. The front panel has thirteen buttons for operating the analyzer, a digital meter, an alphanu- meric display, and a window for
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1 Introduction Model 3000PA Function Keys: Six touch-sensitive membrane switches are used to change the specific function performed by the analyzer: Analyze Perform analysis for oxygen content of a sample gas. System Perform system-related tasks (described in detail in chapter 4, Operation.). Span Span calibrate the analyzer. Zero Zero calibrate the analyzer. Alarms Set the alarm setpoints and attributes. Range Set up the 3 user definable ranges for the instrument. Data Entry Key
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Percent Oxygen Analyzer Introduction 1 Access Door: To provide access to the Micro-Fuel Cell, the front panel swings open when the latch in the upper right corner of the panel is pressed all the way in with a narrow gauge tool. Accessing the main circuit board requires unfastening the rear panel screws and sliding the unit out of the case. 1.6 Recognizing Difference Between LCD & VFD LCD has GREEN background with BLACK characters. VFD has DARK background with GREEN characters. In th
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1 Introduction Model 3000PA Alarm Connections 2 concentration alarms and 1 system alarm. RS-232 Port Serial digital concentration signal output and control input. Remote Probe Used in the 3000PA for controlling external solenoid valves only. Remote Span/Zero Digital inputs allow external control of analyzer calibration. (See Note, below.) Calibration Contact To notify external equipment that instrument is being calibrated and readings are not monitoring sample. Range ID Contacts
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Percent Oxygen Analyzer Operational Theory 2 Operational Theory 2.1 Introduction The analyzer is composed of three subsystems: 1. Micro-Fuel Cell Sensor 2. Sample System 3. Electronic Signal Processing, Display and Control The sample system is designed to accept the sample gas and transport it through the analyzer without contaminating or altering the sample prior to analysis. The Micro-Fuel Cell is an electrochemical galvanic device that translates the amount of oxygen present in the sample in
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2 Operational Theory Model 3000PA analyzed. The Micro-Fuel Cell is therefore a hybrid between a battery and a true fuel cell. (All of the reactants are stored externally in a true fuel cell.) 2.2.2 Anatomy of a Micro-Fuel Cell The Micro-Fuel Cell is a cylinder only 1¼ inches in diameter and 1 inch thick. It is made of extremely inert plastic, which can be placed confi- dently in practically any environment or sample stream. It is effectively sealed, although one end is permeable to oxygen i
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Percent Oxygen Analyzer Operational Theory 2 2 the oxygen sensing element—the cathode—with a surface area almost 4 cm . The cathode has many perforations to ensure sufficient wetting of the upper surface with electrolyte, and it is plated with an inert metal. The anode structure is below the cathode. It is made of lead and has a proprietary design which is meant to maximize the amount of metal available for chemical reaction. At the rear of the cell, just below the anode structure, is a flexibl
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2 Operational Theory Model 3000PA (These reactions will hold as long as no gaseous components capable of oxidizing lead—such as iodine, bromine, chlorine and fluorine—are present in the sample.) The output of the fuel cell is limited by (1) the amount of oxygen in the cell at the time and (2) the amount of stored anode material. In the absence of oxygen, no current is generated. 2.2.4 The Effect of Pressure In order to state the amount of oxygen present in the sample as a per- centage of t
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Percent Oxygen Analyzer Operational Theory 2 Figure 2-3. Characteristic Input/Output Curve for a Micro-Fuel Cell 2.2.6 Micro-Fuel Cell “Class” TBE manufactures Micro-Fuel Cells with a variety of characteristics to give the best possible performance for any given sample conditions. A few typical Micro-Fuel Cells are listed below with their typical use and electrical specifications. 2.2.6.1 Class A-3 Cell The class A-3 cell is for use in applications where it is exposed continu- ously to carbo
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2 Operational Theory Model 3000PA Nominal output in air is 0.19 mA, and 90 % response time is 45 s. Expected life in flue gas is 8 months. 2.2.6.3 Class B-1 Cell The class B-1 cell is for use in applications where it is exposed to less than 0.1 % of carbon dioxide, and where fast response is important. Nominal output in air is 0.50 mA, and 90 % response time is 7 s. Expected life in air is 8 months. 2.2.6.4 Class B-3 Cell The class B-3 cell is for use in applications where a slightly longe
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Percent Oxygen Analyzer Operational Theory 2 mizes residual gas pockets that can interfere with very low level oxygen analysis. The sample system for the standard instrument incorporates ¼ inch tube fittings for sample inlet and outlet connections at the rear panel. For metric system installations, 6 mm adapters are supplied with each instrument. The sample or calibration gas flow through the system is monitored by a flow- meter downstream from the cell. Figure 2-4 shows the piping layout for
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2 Operational Theory Model 3000PA Components in the shaded area are in Span In the -C option (internal control valves) only and are not shown in the piping diagram above. Zero In Cell Sample In Solenoid Valves In vacuum service the Flowmeter restrictor should be In normal service the placed here . restrictor should be placed here . Exhaust Out Restrictor Figure 2-5: Flow Diagram 2.4 Electronics and Signal Processing The Model 3000P Percent Oxygen Analyzer uses an 8031 microcon- trolle
