Analytical Industries Inc (AII) GPR-2900 Operating Manual

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Technical Specifications *

Accuracy: < 2% of FS range under constant conditions Analysis:

Application:

Approvals: CE Area Classifica-

Alarms:

Calibration:

Compensation: Barometric pressure and temperature Connections: 1/8" compression tube fittings Controls:

Display:

Enclosure: Painted aluminum 6” x 4” x 4” panel mount Flow: Not flow sensitive, 1-2 SCFH recommended Linearity: > .995 over all ranges Pressure:

Power: Universal; specify 100/120/220/240 VAC or 12-28 VDC Range ID:

Response Time: 90% of final FS reading < 10 seconds Sample System: None Sensitivity: < 0.5% of FS range Sensor Model:

Sensor Life:

Signal Output: 4-20mA non-isolated or 1-5V Temp. Range: 5ºC to 45ºC (GPR sensor); -10ºC to 45ºC (XLT sensor)

0-1%, 0-5%, 0-10%, 0-25% FS ranges; optional 0-1%, 0-5%, 0-10%, 0-100% FS ranges: auto-ranging or fixed single range

Oxygen analysis in inert, helium, hydrogen, mixed and acid (CO2) gas streams

General purpose 2 adjustable form C relay contacts non-latching; “weak

sensor” indicator; power failure; system failure Max interval—3 months. Air calibrate with clean source

of certified span gas, compressed, or ambient (20.9% O2) air on 0-25% range.

Water resistant keypad; menu driven range selection, calibration, alarm and system functions

Graphical LCD 5” x 2.75”; resolution .001%; displays

real time ambient temperature and pressure

Inlet - regulate to 5-30 psig to deliver 1-2 SCFH flow; vent - atmospheric

4-20 mA non-isolated or 1-5V; option: relay contacts (eliminates alarms)

GPR-11-60-4 for non-acid (CO2) gas streams XLT-11-24-4 for gases containing > 0.5% CO2

GPR-11-60-4 60 months in air at 25ºC and 1 atm XLT-11-24-4 24 months in air at 25ºC and 1 atm

GPR-2900

Oxygen Analyzer

Panel Mount Configuration for OEM Applications

Advanced Sensor Technology

 Unmatched 60 Month Life  Extended Operating Range –10⁰C  Excellent Compatibility with 0-100% CO  Sensitivity < 0.5% FS Range  Fast Response  No Maintenance

100-240 VAC or 12-28 VDC Power 2 Field Selectable Alarm Setpoints

Power and System Failure Alarms

Sensitivity 0.5% Full Scale 4 Ranges Standard Auto Ranging or Single Fixed 4-20 mA or 1-5V Signal Output Range ID 4-20 mA, 1-5V, or Relay Contacts

Warranty: 12 months analyzer; 12 months sensor Wetted Parts: Corrosion resistant material; stainless steel optional

Optional Equipment

ISO 9001:2008 Certified

Sample conditioning accessories - contact factory

* Specification subject to change without notice.

2855 Metropolitan Place, Pomona, CA 91767 USA ♦ Tel: 909-392-6900, Fax: 909-392-3665, www.aii1.com, e-mail: info@aii1.com Rev 10/15

INTERTEK Certificate No. 485

Advanced Instruments Inc.

GPR-2900

Oxygen Analyzer

Owner’s Manual

2855 Metropolitan Place, Pomona, California 91767 USA ♦ Tel: 909-392-6900, Fax: 909-392-3665, e-mail: info@aii1.com

Table of Contents

Introduction 1 Quality Control Certification 2 Safety 3 Features & Specifications 4 Operation 5 Maintenance 6 Spare Parts 7 Troubleshooting 8 Warranty 9 Material Safety Data Sheets 10 Correlating readings - LCD display to 4-20mA output Appendix B

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Drawings A/R

1 Introduction

Your new oxygen analyzer is a precision piece of equipment designed to give you years of use in variety of industrial oxygen applications.

This analyzer is designed to measure the oxygen concentration in inert gases, gaseous hydrocarbons, hydrogen, a variety of gas mixtures and acid gases containing from 0-100% CO

In order to derive maximum performance from your new oxygen analyzer, please read and follow the guidelines provided in this Owner’s Manual.

The serial number of this analyzer may be found on the inside the analyzer. You should note the serial number in the space provided and retains this Owner’s Manual as a permanent record of your purchase, for future reference and for warranty considerations.

Serial Number: _______________________ Every effort has been made to select the most reliable state of the art materials and components designed for superior

performance and minimal cost of ownership. This analyzer was tested thoroughly by the manufacturer for best performance. However, modern electronic devices do require service from time to time. The warranty included herein plus a staff of trained professional technicians to quickly service your analyzer is your assurance that we stand behind every analyzer sold.

Advanced Instruments Inc. appreciates your business and pledge to make effort to maintain the highest possible quality standards with respect to product design, manufacturing and service.

(for CO

background, the XLT series sensor must be used) present.

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2 Quality Control Certification

Date: Customer: Order No.: Pass

Model: GPR-2900 Oxygen Analyzer S/N __________________ Sensor:

Accessories:

Configuration:

Test

Final

Options: Notes

( ) GPR-11-60-4 Oxygen Sensor ( ) XLT-11-24-4 Oxygen Sensor S/N __________________ Owner’s Manual CABL-1008 Power Cord CABL-1014 Connector Cable (GPR-2900W) Ranges: 0-1%, 0-5%, 0-10%, 0-25% A-1161-2 PCB Assembly Main / Display A-1162-2 PCB Assembly Power Supply / Interconnection

Software version: Power: ( ) 100/120/220/240 VAC ( ) 9-28 VDC non-loop Enclosure: Panel mount 7W x 4”H x 4”D (panel cutout 6”W x 3”H) System start-up diagnostics satisfactory Alarm relays activate/deactivate with changes in O Analog signal output 4-20mA Alarm relays activate/deactivate with changes in O Alarm bypass Range ID 4-20mA reflects range changes Baseline drift on zero gas < ± 2% FS over 24 hour period Noise level < ± 1.0% FS Span adjustment within 10-50% FS Overall inspection for physical defects

1 of 1 due ASAP

concentration

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3 Safety Guidelines

General

This section summarizes the essential precautions applicable to the GPR-2900 Oxygen Analyzer. Additional precautions specific to individual analyzer are contained in the following sections of this manual. To operate the analyzer safely and obtain maximum performance follow the basic guidelines outlined in this Owner’s Manual.

Caution: This symbol is used throughout the Owner’s Manual to Caution and alert the user to recommended safety and/or operating guidelines.

Danger: This symbol is used throughout the Owner’s Manual to identify sources of immediate Danger such as the presence of hazardous voltages.

Read Instructions: Before operating the analyzer read the instructions. Retain Instructions: The safety precautions and operating instructions found in the Owner’s Manual should be retained for

future reference.

Heed Warnings: Follow all warnings on the analyzer, accessories (if any) and in this Owner’s Manual. Follow Instructions: Observe all precautions and operating instructions. Failure to do so may result in personal injury or

damage to the analyzer.

Pressure and Flow

Inlet Pressure: GPR-2900 Oxygen Analyzers is designed for flowing samples, equipped with 1/8” bulkhead tube fitting connections on the side of the sensor flow housing (unless otherwise indicated, either fitting can serve as inlet or vent) and are intended to operate at positive pressure regulated to between 5-30 psig.

Outlet Pressure: The sample gas vent pressure should be atmospheric.

Installation

Oxygen Sensor: DO NOT open the sensor. The sensor contains a corrosive liquid electrolyte that could be harmful if touched or ingested, refer to the Material Safety Data Sheet contained in the Owner’s Manual appendix. Avoid contact with any liquid or crystal type powder in or around the sensor or sensor housing, as either could be a form of electrolyte. Leaking sensors should be disposed of in accordance with local regulations.

Mounting: The analyzer is approved for indoor use, outdoor use requires mounting in a secondary enclosure with the appropriate NEMA rating. Mount as recommended by the manufacturer.

Power: Supply power to the analyzer only as rated by the specification or markings on the analyzer enclosure. The wiring that connects the analyzer to the power source should be installed in accordance with recognized electrical standards and so they are not pinched particularly near the power source and the point where they attach to the analyzer. Never yank wiring to remove it from an outlet or from the analyzer.

Operating Temperature: The maximum operating temperature is 45º C. Heat: Situate and store the analyzer away from sources of heat. Liquid and Object Entry: The analyzer should not be immersed in any liquid. Care should be taken so that liquids are not

spilled into and objects do not fall into the inside of the analyzer. Handling: Do not use force when using the switches and knobs. Before moving your analyzer be sure to disconnect the

wiring/power cord and any cables connected to the output terminals located on the analyzer.

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Maintenance

Serviceability: Except for replacing the oxygen sensor, there are no parts inside the analyzer for the operator to service. Only trained personnel with the authorization of their supervisor should conduct maintenance.

Troubleshooting: Consult the guidelines in Section 8 for advice on the common operating errors before concluding that your analyzer is faulty. Do not attempt to service the analyzer beyond those means described in this Owner’s Manual. Do not attempt to make repairs by yourself as this will void the warranty as per Section 10 and may result in electrical shock, injury or damage. All other servicing should be referred to qualified service personnel.

Cleaning: The analyzer should be cleaned only as recommended by the manufacturer. Wipe off dust and dirt from the outside of the unit with a soft damp cloth then dry immediately. Do not use solvents or chemicals.

Nonuse Periods: If the analyzer is equipped with a range switch advance the switch to the OFF position and disconnect the power when the analyzer is left unused for a long period of time.

4 Features & Specifications

Specifications are subject to change without notice. See last page for current specifications, this section left blank intentionally.

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5 Operations

Principle of Operation

The GPR-2900 Oxygen Analyzer incorporates a variety of percentage range advanced galvanic fuel cell type sensors. This model is configured for panel mounting and requires a 6”W x 3”H cutout with 4 holes for the studs located on the back side of the analyzer’s front panel.

Optional mounting configurations include a 19” rack or wall mount enclosure with or without a sample system. Contact the factory for additional information on options.

Advanced Galvanic Sensor Technology:

The sensors function on the same principle and are specific for oxygen. They measure the partial pressure of oxygen from low ppm to 100% levels in inert gases, gaseous hydrocarbons, helium, hydrogen, mixed gases, acid gas streams and ambient air. Gas streams with acid gases like CO2 in the background in concentrations greater than 0.5% require the use of an XLT Series oxygen sensor to maintain accuracy and reasonable sensor life.

Oxygen, the fuel for this electrochemical transducer, diffusing into the sensor reacts chemically at the sensing electrode to produce an electrical current output proportional to the oxygen concentration in the gas phase. The sensor’s signal output is linear over all ranges and remains virtually constant over its useful life. The sensor requires no maintenance and is easily and safely replaced at the end of its useful life.

Proprietary advancements in design and chemistry add significant advantages to an extremely versatile oxygen sensing technology. The expected life of our new generation of percentage range sensors now range to five and ten years with faster response times and greater stability. Another significant development involves expanding the operating temperature range for percentage range sensors from -30°C to 50°C.

Electronics:

The signal generated by the sensor is processed by state of the art low power micro-processor based digital circuitry. The first stage amplifies the signal. The second stage eliminates the low frequency noise. The third stage employs a high frequency filter and compensates for signal output variations caused by ambient temperature changes. The result is a very stable signal.

Sample oxygen is analyzed very accurately. Response time of 90% of full scale is less than 10 seconds (actual experience may vary due to the integrity of sample line connections, dead volume and flow rate selected) on all ranges under ambient monitoring conditions. Sensitivity is typically 0.5% of full scale low range.

Additional features of the micro-processor based electronics include manual or auto ranging, isolated 4-20mA signal for signal output and range ID. Whenever the analyzer is calibrated, a unique algorithm predicts and displays a message indicating a ‘weak sensor’ suggesting the sensor be replaced in the near future.

Users interested in adding their own sample handling or conditioning system are encouraged to consult the factory to ensure all applicable conditions are addressed to ensure proper operation of the analyzer. Advanced Instruments Inc. offers a full line of sample handling, conditioning and expertise to meet your application requirements. Contact us at 909-392-6900 or e-mail us at

info@aii1.com

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Calibration & Accuracy Overview

Single Point Calibration: As previously described the galvanic oxygen sensor generates an electrical current proportional to the oxygen concentration in the sample gas. In the absence of oxygen the sensor exhibits an absolute zero, e.g. the sensor does not generate a current output in the absence of oxygen. Given these linearity and absolute zero properties, single point calibration is possible.

Pressure: Because sensors are sensitive to the partial pressure of oxygen in the sample gas their output is a function of the number of molecules of oxygen 'per unit volume'. Readouts in percent are permissible only when the total pressure of the sample gas being analyzed remains constant. The pressure of the sample gas and that of the calibration gas(es) must be the same (reality < 1-2 psi).

Temperature: The rate oxygen molecules diffuse into the sensor is controlled by a Teflon membrane otherwise known as an 'oxygen diffusion limiting barrier' and all diffusion processes are temperature sensitive, the fact the sensor's electrical output will vary with temperature is normal. This variation is relatively constant 2.5% per ºC. A temperature compensation circuit employing a thermistor offsets this effect with an accuracy of + independent of temperature. There is no error if the calibration and sampling are performed at the same temperature or if the measurement is made immediately after calibration. Lastly, small temperature variations of 10-15º produce < 1% error.

Accuracy:

producing 'percent of reading errors', illustrated by Graph A below, such as + of range resistors and the 'play' in the potentiometer used to make span adjustments and 2) those producing 'percent of full scale errors', illustrated by Graph B, such as + technology and the fact that other errors are 'spanned out' during calibration. Graph C illustrates these 'worse case' specifications that are typically used to develop an analyzer's overall accuracy statement of < 1% of full scale at constant temperature or < 5% over the operating temperature range. QC testing is typically < 0.5% prior to shipment.

Example 1: As illustrated by Graph A any error, play in the multi-turn span pot or the temperature compensation circuit, during a span adjustment at 20.9% (air) of full scale range would be multiplied by a factor of 4.78 (100/20.9) if used for measurements of 95-100% oxygen concentrations. Conversely, an error during a span adjustment at 100% of full scale range is reduced proportionately for measurements of lower oxygen concentrations.

Zero Calibration: In theory signal output when exposed to an oxygen free sample gas. In reality sampling oxygen free sample gas due to contamination or quality of the zero gas; minor leakage in the sample line connections; residual oxygen dissolved in the sensor’s electrolyte; and, tolerances of the electronic components. The Zero Offset capability of the analyzer is limited to 50% of lowest most sensitive range available with the analyzer.

In light of the above parameters, the overall accuracy of an analyzer is affected by two types of errors: 1) those

1-2% linearity errors in readout devices, which are really minimal due to today's

, the electrochemical galvanic fuel cell type oxygen has an absolute zero meaning it produces no

5% or better and generates an output function that is

5% temperature compensation circuit, tolerances

, expect the analyzer to generate an oxygen reading when

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Recommendation 1: Zero calibration, see Determining True Zero Offset below, is recommended only for online analyzers performing continuous analysis below 5% of the lowest most sensitive range available with a ppm analyzer, e.g. analysis below

0.5 ppm on the 10 ppm range, or below 0.1% (1000 ppm) with a percent analyzer. Note 1: Once the zero offset adjustment is made, zero calibration is not required again until the sample system connections are modified, or, when installing a new oxygen sensor. As a result, zero calibration is not practical and therefore not recommended for higher ranges or portable analyzers.

Determining True Zero Offset: stable reading or horizontal trend on an external recording device. Note 2: 24 hours is required to assure the sensor has consumed the oxygen that has dissolved into the electrolyte inside the sensor while exposed to air or percentage levels of oxygen. For optimum accuracy, utilize as much of the actual sample system as possible.

Span Calibration: Involves adjusting the analyzer electronics to the sensor’s signal output at a given oxygen standard. Regardless of the oxygen concentration of the oxygen standard used, a typical span calibration takes approximately 10 minutes.

Note 3: The amount time required to get the analyzer back on line for normal use is influenced by a.) the level of oxygen analysis anticipated during normal operation (also determines the initial analyzer selection), and, b.) whether the sensor is new or has been in service for at least two weeks.

General guidelines oxygen content below the stated thresholds:

¾ measurements above 1000 ppm or 0.1% require less than 3 minutes ¾ measurements above 100 ppm (parts-per-million analyzer) require less than 10 minutes ¾ measurements below 10 ppm (part-per-million analyzer) require 20 minutes if the sensor has been in service at ppm

levels for at least two weeks, and, 60 minutes if the sensor is new assuming the zero/purge/sample gas has an oxygen concentration below 1 ppm

for analyzers to come online following span calibration and exposure to a zero/purge/sample gas with an

Recommendation 2: For 'optimum calibration accuracy' calibrate with a span gas approximating 80% of the full scale range one or two ranges higher than the full scale range of interest (normal use) to achieve the effect illustrated on Graph A and Example 1. Always calibrate at the same temperature and pressure of the sample gas stream.

Note 4: Calibrating with a span gas approximating 10% of the full scale range near the expected oxygen concentration of the sample gas is acceptable but less accurate than ‘optimum calibration accuracy’ method recommended – the method usually depends on the gas available. Calibrating at the same 10% of the full scale range for measurements at the higher end of the range results in magnification of errors as discussed in Graph A and Example 1 and is not recommended. Of course the user can always elect at his discretion to accept an accuracy error of +

Air Calibration: calibrate the analyzer with ambient air (20.9% oxygen) and operate the analyzer within the stated accuracy spec on the lowest most sensitive range available with the analyzer – there is no need to recalibrate the analyzer with span gas containing a lower oxygen concentration. Except for Oxygen Purity Analyzers intended to measure elevated oxygen levels ranging from 50-100% oxygen, calibrating either a ppm or percent analyzer with ambient air on the CAL or 0-25% range meets the 80% criteria discussed in Recommedation 2.

Recommendation 3: Air calibrate the analyzer (with the exception of Oxygen Purity Analyzers intended to measure elevated oxygen levels ranging from 50-100% oxygen) when operating a percent analyzer, installing and replacing a ppm oxygen sensor, to verify the oxygen content of a certified span gas or when a certified span gas is not available to calibrate a ppm analyzer (immediately following air calibration reintroduce a gas with a low oxygen concentration to expedite the return to ppm level measurements as per Note 3).

Based on the inherent linearity of the electrochemical galvanic fuel cell type oxygen sensor enables the user to

Allow the analyzer approximately 24 hours to stabilize with flowing zero gas as evidenced by a

2-3% of full scale range if no other span gas is available.

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Installation Considerations

Gas Sample Stream: Ensure the gas stream composition of the application is consistent with the specifications and review the application conditions before initiating the installation. Consult the factory if necessary to ensure the sample is suitable for analysis.

Note: In natural gas applications such as extraction and transmission, a low voltage current is applied to the pipeline itself to inhibit corrosion. As a result, electronic devices can be affected unless adequately grounded.

Contaminant Gases: A gas scrubber and flow indicator with integral metering valve are required upstream of the analyzer to remove interfering gases such as oxides of sulfur and nitrogen or hydrogen sulfide that can produce false readings, reduce the expected life of the sensor and void the sensor’s warranty if not identified at time of order placement. Installation of a suitable scrubber is required to remove the contaminant from the sample gas to prevent erroneous analysis readings and damage to the sensor or optional components. Consult the factory for recommendations concerning the proper selection and installation of components.

Expected Sensor Life: With reference to the publish specification located as the last page of this manual, the expected life of all oxygen sensors is predicated on oxygen concentration (< 1000 ppm or air), temperature (77°F/25°C) and pressure (1 atmosphere) in “normal” applications. Deviations are outside the specifications and will affect the life of the sensor. As a rule of thumb sensor life is inversely proportional to changes in the parameters.

Optimum Accuracy: Determine if Zero Calibration is recommended for your application. If it is Zero Calibration should precede Span Calibration and both should be repeated after the analyzer has been allowed to stabilize, typically 24-36 hours after installation. For Span Calibration use a certified span gas with an oxygen content (balance nitrogen) approximating 80% of the next higher full scale range above the intended measuring range is recommended for optimum accuracy, see Calibration and Accuracy.

Assuming the initial zero is performed according to the procedure described herein, the analyzer should not require Zero Calibration again until the either the sensor is replaced or a change is made to the sample system or gas lines, and, it should not require Span Calibration again for up to 3 months under “normal” application conditions as described in the published specifications. One of the unique features of analyzers based on the electrochemical galvanic fuel cell type oxygen sensor is the fact that it can be field calibrated at the user’s discretion to whatever standard of certified span gas the user elects to use.

Zero Calibration: In theory reality, expect the analyzer to generate an oxygen reading when sampling oxygen free sample gas due to contamination or quality of the zero gas; minor leakage in the sample line connections; residual oxygen dissolved in the sensor’s electrolyte; and, tolerances of the electronic components.

Zero calibration, see Determining True Zero Offset below, is recommended only analysis below 5% of the lowest most sensitive range available with a ppm analyzer, e.g. analysis below 0.5 ppm on the 10 ppm range, or below 0.1% (1000 ppm) with a percent analyzer. Note : Once the zero offset adjustment is made, zero calibration is not required again until the sample system connections are modified, or, when installing a new oxygen sensor. As a result, zero calibration is not practical and therefore not recommended for higher ranges or portable analyzers.

Determining True Zero Offset: stable reading or horizontal trend on an external recording device. Note: 24 hours is required to assure the sensor has consumed the oxygen that has dissolved into the electrolyte inside the sensor while exposed to air or percentage levels of oxygen. For optimum accuracy, utilize as much of the actual sample system as possible.

Span Calibration: Involves adjusting the analyzer electronics to the sensor’s signal output at a given oxygen standard, e.g. a certified span gas with an oxygen content (balance nitrogen) approximating 80% of the next higher full scale range above the intended measuring range is recommended for optimum accuracy, see Calibration and Accuracy.

Recommendation: ambient air (20.9% oxygen) and operate the analyzer within the stated accuracy spec on the lowest most sensitive range available with the analyzer – there is no need to recalibrate the analyzer with span gas containing a lower oxygen concentration. Calibrating either a ppm or percent analyzer with ambient air (with the exception of Oxygen Purity Analyzers intended to measure elevated oxygen levels ranging from 50-100% oxygen) on the CAL or 0-25% range meets the 80% criteria discussed above.

Based on the inherent linearity of the galvanic oxygen sensor enables the user to calibrate the analyzer with

, the oxygen sensor produces no signal output when exposed to an oxygen free sample gas. In

for online analyzers performing continuous

Allow the analyzer approximately 24 hours to stabilize with flowing zero gas as evidenced by a

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Air calibrate the analyzer (with the exception of Oxygen Purity Analyzers intended to measure elevated oxygen levels ranging from 50-100% oxygen) when operating a percent analyzer, installing and replacing a ppm oxygen sensor, to verify the oxygen content of a certified span gas or when a certified span gas is not available to calibrate a ppm analyzer (immediately following air calibration reintroduce a gas with a low oxygen concentration to expedite the return to ppm level measurements).

Materials: Assemble the necessary zero, purge and span gases and optional components such as valves, coalescing or particulate filters, and, pumps as dictated by the application; stainless steel tubing is essential for maintaining the integrity of the gas stream for ppm and percentage range (above or below ambient air) analysis; hardware for mounting.

Temperature: The sample must be sufficiently cooled before it enters the analyzer and any optional components. A coiled 10 foot length of ¼” stainless steel tubing is sufficient for cooling sample gases as high as 1,800ºF to ambient.

Pressure & Flow: All electrochemical oxygen sensors respond to partial pressure changes in oxygen. The sensors are equally capable of analyzing the oxygen content of a flowing sample gas stream or monitoring the oxygen concentration in ambient air (such as a confined space such in a control room or an open area such as a landfill or bio-pond).

Sample systems and/or flowing gas samples are generally required for applications involving oxygen measurements at levels other than ambient air and when the pressure exceeds ambient. In these situations, the use of stainless steel tubing and fittings is critical to maintaining the integrity of the gas stream to be sampled and the inlet pressure must always be higher than the pressure at the outlet vent which is normally at atmospheric pressure. The sensor is exposed to sample gas that must flow or be drawn through metal tubing via 1/8” compression inlet and vent fittings, a stainless steel sensor housing with an o-ring seal to prevent the leakage of air and stainless steel tubing.

Flow rates of 1-5 SCFH cause no appreciable change in the oxygen reading. However, flow rates above 5 SCFH generate backpressure and erroneous oxygen readings because the diameter of the integral tubing cannot evacuate the sample gas at the higher flow rate. The direction the sample gas flows is not important, thus either tube fitting can serve as the inlet or vent – just not simultaneously.

A flow indicator with an integral metering valve upstream of the sensor is recommended as a means of controlling the flow rate of the sample gas. A flow rate of 2 SCFH or 1 liter per minute is recommended for optimum performance.

Caution: Do not place your finger over the vent (it pressurizes the sensor) to test the flow indicator when gas is flowing to the sensor. Removing your finger (the restriction) generates a vacuum on the sensor and may damage the sensor (voiding the sensor warranty). To avoid generating a vacuum on the sensor (as described above) during operation, always select and install the vent fitting first and remove the vent fitting last.

Application Pressure - Positive: A flow indicator with integral metering valve positioned upstream of the sensor is recommended for controlling the sample flow rate between 1-5 SCFH. To reduce the possibility of leakage for low ppm measurements, position a metering needle valve upstream of the sensor to control the flow rate and position a flow indicator downstream of the sensor. If necessary, a pressure regulator (with a metallic diaphragm is recommended for optimum accuracy, the use of diaphragms of more permeable materials may result in erroneous readings) upstream of the flow control valve should be used to regulate the inlet pressure between 5-30 psig.

Application Pressure - Atmospheric or Slightly Negative: For accurate ppm range oxygen measurements, an optional external sampling pump should be positioned downstream of the sensor to draw the sample from the process, by the sensor and out to atmosphere. A flow meter is generally not necessary to obtain the recommended flow rate with most sampling pumps.

Caution: If the analyzer is equipped with an optional flow indicator with integral metering valve or a metering flow control valve upstream of the sensor - open the metering valve completely to avoid drawing a vacuum on the sensor and placing an undue burden on the pump. If pump loading is a consideration, a se necessary to provide a bypass path so the sample flow rate is within the above parameters.

cond throttle

valve on the pump’s inlet side may be

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Recommendations to avoid erroneous oxygen readings and damaging the sensor:

¾ Do not place your finger over the vent (it pressurizes the sensor) to test the flow indicator when gas is flowing to the

sensor. Removing your finger (the restriction) generates a vacuum on the sensor and may damage the sensor (voiding the sensor warranty).

¾ Assure there are no restrictions in the sample or vent lines ¾ Avoid drawing a vacuum that exceeds 14” of water column pressure – unless done gradually ¾ Avoid excessive flow rates above 5 SCFH which generate backpressure on the sensor. ¾ Avoid sudden releases of backpressure that can severely damage the sensor. ¾ Avoid the collection of liquids or particulates on the sensor, they block the diffusion of oxygen into the sensor ¾ If the analyzer is equipped with an optional integral sampling pump (positioned downstream of the sensor) and a flow

control metering valve (positioned upstream of the sensor), completely open the flow control metering valve to avoid drawing a vacuum on the sensor and placing an undue burden on the pump.

Moisture & Particulates: Installation of a suitable coalescing or particulate filter is required to remove condensation, moisture and/or particulates from the sample gas to prevent erroneous analysis readings and damage to the sensor or optional components. Moisture and/or particulates do not necessarily damage the sensor, however, collection on the sensing surface can block or inhibit the diffusion of sample gas into the sensor resulting in a reduction of sensor signal output – and the appearance of a sensor failure when in fact the problem is easily remedied by blowing on the front of the sensor. Consult the factory for recommendations concerning the proper selection and installation of components.

Gas Connections: Inlet and outlet vent gas lines for ppm analysis require 1/8” or ¼” stainless steel compression fittings; hard plastic tubing with a low permeability factor can be used percentage range measurements.

Power Connection: Locate the appropriate source of to meet the analyzer or analyzer requirements, ensure that is properly grounded and meets the area classification.

Mounting the Analyzer & Sensor:

The GPR-2900 consists of a six (6) foot insulated cable which connects the sensor to the rear of the electronics module, a long life maintenance free oxygen sensor and a sensor flow housing equipped with 1/8” diameter stainless steel compression fittings.

The compact design also lends itself to optional mounting configuration such as a standard 19” rack or wall mount enclosures, both of which can be equipped with optional sample system components. Contact the factory for additional information.

Procedure:

1. The GPR-2900 front panel measures 7”W x 4”H x 4.5”D. This compact configuration is designed for panel mounting directly to any flat vertical surface, wall or bulkhead plate with the appropriate 6”W x 3”H cut out and four ¼” diameter holes for insertion of the mounting studs located on the back side of the front panel.

2. When mounting the analyzer position it approximately 5 feet off the floor for viewing purposes and allow sufficient room for access to the terminal connections at the rear of the enclosure. Note: The proximity of the analyzer to the sample point and use of optional sample conditioning components have an impact on sample lag time.

3. Position the sensor flow housing along any flat surface. The base of sensor flow housing is fabricated with two 6/32 mounting holes. The oxygen sensor is not position sensitive but it is recommended to orient the sensor flow housing with the female threaded opening facing the ceiling.

4. Next screw the sensor into sensor flow housing, snug the sensor’s sealing o-ring but do not over tighten or crush it.

5. Register the female plug molded to the cable with the mating male connector attached to the rear of the sensor.

6. Remove the shorting device, normally a formed spring type wire, from the sensor, push the registered mating connectors together and turn the knurled lock ring on the molded plug until finger tight on the sensor’s connector.

7. Connect the four wires of the cable, following the color coding above the terminal block, at the rear of the analyzer.

8. Attach the flow housing to the mounting position determine above.

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Gas Connections:

The GPR-2900 with its standard flow through configuration is designed for positive pressure samples and requires connections for incoming sample and outgoing vent lines. The user is responsible for calibration gases and the required components, see below. Flow rates of 1-5 SCFH cause no appreciable change in the oxygen reading. However, flow rates above 5 SCFH generate backpressure and erroneous oxygen readings because the diameter of the integral tubing cannot evacuate the sample gas at the higher flow rate. A flow indicator with an integral metering valve upstream of the sensor is recommended as a means of controlling the flow rate of the sample gas. A flow rate of 2 SCFH or 1 liter per minute is recommended for optimum performance.

Caution: Do not place your finger over the fitting designated as the vent (it pressurizes the sensor) or to test the flow indicator when gas is flowing to the sensor. Removing your finger (the restriction) generates a vacuum on the sensor and may damage the sensor (voiding the sensor warranty).

Procedure:

1. Caution: Do not change the factory setting until instructed.

2. Designate the female quick disconnect fittings, right side of the analyzer, as inlet and vent respectively.

3. Regulate the pressure and flow as described in Pressure & Flow above.

4. Install one mating male vent fitting into the female quick disconnect fitting designated as the VENT – connection of 1/8” dia. metal vent line (requires an 1/8” male NPT to tube adapter) is optional.

5. Connect the second mating male fitting to 1/8” dia. metal sample line using a 1/8” male NPT to tube adapter.

6. Connect the third mating male fitting to 1/8” dia. metal span gas line using a 1/8” male NPT to tube adapter.

7. Install either the sample or span mating male fitting into the female quick disconnect fitting designated as SAMPLE.

8. Set the flow rate to 2 SCFH (open the flow control valve completely if using an external sampling pump positioned downstream of the sensor).

9. Allow gas to flow through the analyzer for 3-5 minutes and proceed to Calibration or Sampling.

Electrical Connections:

The appropriate AC or DC power requirement must specified be specified at order placement.

Incoming power for the 100-250V AC powered analyzers is supplied through a universal power entry module. A standard computer type power cord (P/N A-1008) is required for the universal power entry module. DC power cable must be supplied by the user. A well grounded insulated power cable is recommended to avoid noise resulting from unwanted interference. Power consumption is approximately 30 watts.

Filtered terminal blocks are provided for power failure, set point alarm relays and signal output connections. The PCB also includes a transformer to power the relays, a sensor bypass switch for troubleshooting the electronics

Caution: Integral 4-20mA converters are internally powered and do not require external power. DO NOT supply any voltage to any of the terminals for 4-20mA signal output and range ID or

the 4-20mA converters will be damaged. Caution: To assure proper grounding, connect the 4-20mA

signal output to the external device (PLC, DCS, etc.) before attempting any zero or span adjustments. Procedure:

1. As illustrated above the sensor, power and alarm relays and signal output connections are hard wired to screw type terminal blocks located at the rear of the analyzer.

2. Use a small bladed screwdriver to loosen the appropriate terminal screws as illustrated above.

3. Strip the wires of the cable no more than 3/16 inch.

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4. To connect to an active relay or “fail safe”, connect the live cable to the common terminal C and the secondary cable to the normally open NO terminal.

5. To break the connection upon relay activation, connect the secondary cable to the normally closed NC terminal.

6. Insert the stripped end of the cables into the appropriate terminal slots assuring no bare wire remains exposed that could come in contact with the back panel of the analyzer enclosure.

7. Tighten the terminal screws to secure the wires of the cable.

Danger: While connecting the cables to the relay terminals, ensure there is no voltage on the cables to prevent electric shock and possible damage to the analyzer. Caution: Assure the stripped wire ends of the cable are fully inserted into the terminal slots and do not touch each other or the back panel of the analyzer enclosure.

Alarm Relays

Alarm 1 and Alarm 2 represent two threshold type alarms that can be configured in the field from the analyzer’s menu driven LCD display as follows:

¾ Establish independent set points ¾ Either Hi or Lo ¾ Either On or Off (enabled or disabled) ¾ Both temporarily defeated using a user entered ‘timeout’ period (normally minutes)

The alarm set point represents a value. When the oxygen reading exceeds (high alarm) or falls below (low alarm) the alarm set point, the relay is activated and the LCD displays the alarm condition. When activated the alarms trigger SPDT Form C nonlatching relays @ 5A, 30VDC or 240VAC resistive. To prevent chattering of the relays, a 2% hysteresis is added to the alarm set point. This means that the alarm will remain active until the oxygen reading has fallen 2% below the alarm set point (high alarm) or risen 2% above the alarm set point (low alarm) after the alarm was activated. Aside from being totally defeated in the Alarm Bypass mode, the timeout feature is useful while replacing the oxygen sensor or during calibration when the oxygen reading might well rise above the alarm set point and trigger a false alarm.

Note: When making connections the user must decide whether to configure/connect Alarm 1 and Alarm 2 in failsafe mode (Normally Open – NO – where the alarm relay de-energizes and closes in an alarm condition) or non-failsafe mode (Normally Closed – NC – where alarm relay energizes and opens in an alarm condition).

Power Failure Alarm

A dry contact rated at 30VDC @ 1A is provided as a power failure alarm that activates when power supplied to the analyzer’s circuits is unacceptable. The contact is normally closed but opens when the power to the analyzer is switched off or interrupted and cannot be disabled.

4-20mA Signal Output and Range ID

The analyzer provides a 4-20mA full scale fully isolated ground signals for external recording devices. The integral IC on the main PCB provides 4-20mA fully isolated signals for output and range ID. The 4-20mA current output is obtained by connecting the current measuring device between the positive and negative terminals labeled OUTPUT 4-20mA. To check the signal output of the 4-20mA E/I integrated circuit connect an ammeter as the measuring device and confirm the output is within + 4mA. A finer adjustment of the zero offset of the 4-20mA converter can be provided by a potentiometer mounted on the main PCB Assembly. Consult factory for instructions

For range ID the output of 4mA, 8mA, 12mA, 16mA, 20mA correspond to the most sensitive to least sensitive analysis range.

Caution:

voltage to any of the two terminals of the 4-20mA converter.

The integral 4-20mA converters are internally powered and do not require external power. DO NOT supply any

0.1mA of

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Installing the Oxygen Sensor

The GPR-2900 Oxygen Analyzer is equipped with an external oxygen sensor. They have been tested and calibrated by the manufacturer prior to shipment and are fully operational from the shipping containers. The sensor has not been installed at the factory and it will be necessary to install the sensor in the field.

Caution: DO NOT open the oxygen sensor. The sensor contains a corrosive liquid electrolyte that could be harmful if touched or ingested, refer to the Material Safety Data Sheet contained in the Owner’s Manual appendix. Avoid contact with any liquid or crystal type powder in or around the sensor or sensor housing, as either could be a form of electrolyte. Leaking sensors should be disposed of in manner similar to that of a common battery in accordance with local regulations.

Procedure:

1. As described above the following steps should already be completed: a) Locate and secure the sensor flow housing with two 6/32 mounting screws, in the preferred position the threaded female should be facing the ceiling; b) connect the gas lines; c) electrical connections.

2. Open the barrier bag containing the new sensor.

3. The sensor is equipped with a wire spring type shorting device, remove the shorting wire from the pins of the male receptacle attached to the new sensor.

4. Line up the registration point of the female plug molded to the cable and male receptacle on the oxygen sensor.

5. Push the female plug (including the knurled lock ring) into the male receptacle attached to the oxygen sensor.

6. Screw and finger tighten the knurled lock ring of the cable plug into to the male connector attached to the sensor.

7. Place the analyzer in the auto ranging mode, see below.

8. With the sensor exposed to ambient air wait for 5-10 minutes until the reading stabilizes.

9. Perform and air calibration as described below.

10. Screw the new sensor, finger tight plus ¼ turn, into the threaded hole in the flow housing and ensure the o-ring seal is engaged but not ‘crushed’.

11. Begin sampling.

Span Gas Preparation

A percent analyzer such as the GPR-2900 may be reliable calibrated with the known 20.9% oxygen content of ambient air and operated confidently at the lowest levels of the most sensitive analysis range. However, the GPR-2900 may be calibrated with span gas at the user’s discretion.

Caution: Do not contaminate the span gas cylinder when connecting the regulator. Bleed the air filled regulator (faster and more reliable than simply flowing the span gas) before attempting the initial calibration of the instrument.

Required components: ¾ Certified span gas cylinder with an oxygen concentration, balance nitrogen, approximating 80% of the full scale range

above the intended measuring range.

¾ Regulator to reduce pressure to between 5 and 30 psig. ¾ Flow meter to set the flow between 1-5 SCFH, ¾ Suitable fittings and 1/8” dia. 4-6 ft. in length of metal tubing to connect the regulator to the flow meter inlet ¾ Suitable fitting and 1/8” dia. 4-6 ft. in length of metal tubing to connect from the flow meter vent to tube fitting designated

SAMPLE IN on the GPR-2900.

Procedure:

1. With the span gas cylinder valve closed, install the regulator on the cylinder.

2. Open the regulator’s exit valve and partially open the pressure regulator’s control knob.

3. Open slightly the cylinder valve.

4. Loosen the nut connecting the regulator to the cylinder and bleed the pressure regulator.

5. Retighten the nut connecting the regulator to the cylinder

6. Adjust the regulator exit valve and slowly bleed the pressure regulator.

7. Open the cylinder valve completely.

8. Set the pressure between 5-30 psig using the pressure regulator’s control knob.

9. Caution: Do not exceed the recommended flow rate. Excessive flow rate could cause the backpressure on the sensor

and may result in erroneous readings and permanent damage to the sensor.

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Establishing Power to the Electronics:

Once the power to the electronics is established, the digital display responds instantaneously. When power is applied, the analyzer performs several diagnostic system status checks termed “START-UP TEST” as illustrated below:

START-UP TEST

ELECTRONICS – PASS TEMP SENSOR – PASS BAROMETRIC SENSOR – PASS

REV. 1.61

Note: The analyzer display defaults to the sampling mode when 30 seconds elapses without user interface.

3.3%

AUTO SAMPLING

10 % RANGE

24.5 C LO1 1% 10% HI2

Menu Navigation

The four (4) pushbuttons located on the front of the analyzer operate the micro-processor:

1. blue ENTER (select)

2. yellow UP ARROW

3. yellow DOWN ARROW

4. green MENU (escape)

Main Menu

Access the MAIN MENU by pressing the MENU key:

MAIN MENU

AUTO SAMPLE

MANUAL SAMPLE CALIBRATION CONFIG ALARMS BYPASS ALARMS

Range Selection

The GPR-2900 analyzer is equipped with four (4) standard measuring ranges (see specification) and provides users with a choice of sampling modes. By accessing the MAIN MENU, users may select either the AUTO SAMPLING (ranging) or MANUAL SAMPLING (to lock on a single range) mode.

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Note: For calibration purposes, use of the AUTO SAMPLE mode is recommended. However, the user can select the full scale MANUAL SAMPLE RANGE for calibration as dictated by the accuracy of the analysis required – for example, a span gas with an

8.0% oxygen concentration with the balance nitrogen would dictate the use of the 0-10% full scale range for calibration and a

0-5% or 0-1% measuring ranges. Auto Sampling:

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight AUTO SAMPLE.

3. Press the ENTER key to select the highlighted menu option.

4. The display returns to the sampling mode:

MAIN MENU

AUTO SAMPLE

MANUAL SAMPLE CALIBRATION CONFIG ALARMS BYPASS ALARMS

The display will shift to the next higher range when the oxygen reading (actually the sensor’s signal output) exceeds 99.9% of the upper limit of the current range. The display will shift to the next lower range when the oxygen reading drops to 85% of the upper limit of the next lower range.

For example, if the analyzer is reading 1% on the 0-10% range and an upset occurs, the display will shift to the 0-25% range when the oxygen reading exceeds 9.9%. Conversely, once the upset condition is corrected, the display will shift back to the 010% range when the oxygen reading drops to 8.5%.

Manual Sampling:

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight MANUAL SAMPLE.

3. Press the ENTER key to select the highlighted menu option.

4. The following display appears:

3.3 %

AUTO SAMPLING

5 % RANGE

24.5 C LO1 1% 10% HI2

MAIN MENU

AUTO SAMPLE

MANUAL SAMPLE

CALIBRATION CONFIG ALARMS BYPASS ALARMS

5. Advance the reverse shade cursor using the ARROW keys to highlight the desired MANUAL RANGE.

6. Press the ENTER key to select the highlighted menu option.

7. The following displays appears with the range selected and oxygen concentration of the sample gas:

MANUAL RANGE

25% 10%

8. The display will not shift automatically. Instead, when the oxygen reading (actually the sensor’s signal output) exceeds 110% of the upper limit of the current range an OVER RANGE warning will be displayed.

>>>

MANUAL RANGE

25% 10% 5%

3.3%

MANUAL SAMPLING

5 % RANGE

24.5 C LO1 1% 10% HI2

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9. Once the OVER RANGE warning appears the user must advance the analyzer to the next higher range via the menu and keypad Press MENU, select MANUAL SAMPLING, press ENTER, select the appropriate MANUAL RANGE and press ENTER again.

Alarms

The CONFIG ALARMS features a system that can be configured in the field. Two field adjustable alarm relays with dry contacts operate independently of one another which means the alarms can be set-up as:

¾ HI and LO ¾ LO and LO, LO, ¾ HI and HI,HI

Additional feature includes delaying the activation of the local audible alarm and relay contacts for up 99 minutes to enable users to distinguish between transient occurrences and true upset conditions which is particularly useful on remote applications without affecting the 4-20mA signal output. The local audible alarm can be silenced or disabled as well without affecting the 420mA signal output.

Note: A separate feature, BYPASS ALARMS described below, enables the user to disable the local audible alarm and relay contacts during calibration or servicing. The alarms are enabled when the alarm condition is corrected.

Set Alarm Values:

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight CONFIG ALARMS.

3. Press the ENTER key to select the highlighted menu option.

4. The following displays appears:

MAIN MENU

AUTO SAMPLE MANUAL SAMPLE CALIBRATION

CONFIG ALARMS

BYPASS ALARMS

>>>

MAIN MENU

SET ALARM 1

SET ALARM 2 SET ALARM DELAY ALARM 1 HI/LO ALARM 2 HI/LO ALARMS AUDIBLE/SILENT

5. Advance the reverse shade cursor using the ARROW keys to highlight the SET ALARM 1 option.

6. Press the ENTER key to select the highlighted menu option.

7. The following displays appears with PERCENT as the default alarm value :

MAIN MENU

SET ALARM 1

SET ALARM 2 SET ALARM DELAY ALARM 1 HI/LO ALARM 2 HI/LO ALARMS AUDIBLE/SILENT

>>>

GAS CONCENTRATION

PERCENT

PPM

8. Advance the reverse shade cursor using the ARROW keys to highlight the desired option.

9. Press the ENTER key to select the highlighted menu option.

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10. Note: The PERCENT alarm value is entered with one decimal, the PPM alarm value is entered as an integer.

GAS CONCENTRATION

PERCENT

PPM

>>>

GAS CONCENTRATION

PERCENT

PPM

>>>

01.0

SET ALARM 1 VALUE

PRESS UP OR DOWN TO CHANGE VALUE ENTER TO SAVE MENU TO RETURN

002

SET ALARM 1 VALUE

PRESS UP OR DOWN TO CHANGE VALUE ENTER TO SAVE MENU TO RETURN

11. Press the ENTER key to advance the underline cursor right or press the MENU key to advance the underline cursor left to reach to the desired digit of the alarm value.

12. Press the ARROW keys to enter the alarm value.

13. Repeat steps 11 and 12 until the complete span value has been entered.

14. Note: If an alarm is set as a PERCENT value and subsequently changed to a PPM value, the PERCENT value is not retained and is reset to 00.0. This holds if the alarm was first set as PPM value and then changed to a PERCENT value.

15. Save the alarm value by pressing the ENTER key or abort by pressing the MENU key.

16. The system returns to the SAMPLING mode and displays:

3.3%

AUTO SAMPLING

24.5 C LO1 2% 10% HI2

Repeat the steps above to set the ALARM 2 value:

10 % RANGE

MAIN MENU

AUTO SAMPLE MANUAL SAMPLE CALIBRATION

CONFIG ALARMS

BYPASS ALARMS

>>>

MAIN MENU

SET ALARM 1

SET ALARM 2

SET ALARM DELAY ALARM 1 HI/LO ALARM 2 HI/LO ALARMS AUDIBLE/SILENT

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Set Alarm Delay: Once the values for ALARM 1 and ALARM 2 have been entered, the user may elect to delay the activation of the local alarms and relay contacts for up to 99 minutes. This feature allows users to distinguish between transient occurrences and true upset conditions. This feature can be particularly useful on remote applications without affecting the 4-20mA signal output.

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight CONFIG ALARMS.

3. Press the ENTER key to select the highlighted menu option.

4. The following displays appear:

MAIN MENU

AUTO SAMPLE MANUAL SAMPLE CALIBRATION

CONFIG ALARMS

BYPASS ALARMS

>>>

MAIN MENU

SET ALARM 1 SET ALARM 2

SET ALARM DELAY

ALARM 1 HI/LO ALARM 2 HI/LO ALARMS AUDIBLE/SILENT

5. Advance the reverse shade cursor using the ARROW keys to highlight the SET ALARM DELAY.

6. Press the ENTER key to select the highlighted menu option.

7. The following displays appear with last alarm delay value :

MAIN MENU

SET ALARM 1 SET ALARM 2

SET ALARM DELAY

ALARM 1 HI/LO ALARM 2 HI/LO ALARMS AUDIBLE/SILENT

>>>

DELAY IN MINUTES

PRESS UP OR DOWN TO CHANGE VALUE ENTER TO SAVE MENU TO RETURN

8. Press the ENTER key to advance the underline cursor right or press the MENU key to advance the underline cursor left to reach to the desired digit of the alarm value.

9. Press the ARROW keys to enter the alarm value.

10. Repeat steps 17 and 18 until the complete span value has been entered.

11. Save the alarm value by pressing the ENTER key or abort by pressing the MENU key.

12. The system returns the SAMPLING mode and displays:

3.3%

AUTO SAMPLING

24.5 C LO1 2% 10% HI2

10 % RANGE

Set HI/LO Alarms:

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight CONFIG ALARMS.

3. Press the ENTER key to select the highlighted menu option.

4. The following displays appears:

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MAIN MENU

AUTO SAMPLE MANUAL SAMPLE CALIBRATION

CONFIG ALARMS

BYPASS ALARMS

>>>

MAIN MENU

SET ALARM 1 SET ALARM 2 SET ALARM DELAY

ALARM 1 HI/LO

ALARM 2 HI/LO ALARMS AUDIBLE/SILENT

5. Advance the reverse shade cursor using the ARROW keys to highlight the ALARM 1 option, which appears as either ALARM 1 HI or ALARM 1 LO.

6. Press the ENTER key to toggle and change the displayed setting. After 3 seconds, the system returns to SAMPLING mode.

3.3%

AUTO SAMPLING

24.5 C LO1 2% 10% HI2

10 % RANGE

7. Repeat steps 1 through 6 for the ALARM 2 HI/LO setting.

Set Local Alarms:

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight CONFIG ALARMS.

3. Press the ENTER key to select the highlighted menu option.

4. The following displays appears:

MAIN MENU

AUTO SAMPLE MANUAL SAMPLE CALIBRATION

CONFIG ALARMS

BYPASS ALARMS

>>>

MAIN MENU

SET ALARM 1 SET ALARM 2 SET ALARM DELAY ALARM 1 HI/LO ALARM 2 HI/LO

ALARMS AUDIBLE/SILENT

5. Advance the reverse shade cursor using the ARROW keys to highlight the ALARMS AUDIBLE/SILENT option, which appear as either ALARMS AUDIBLE or ALARMS SILENT.

6. Press the ENTER key to toggle and change the displayed setting. After 3 seconds, the system returns to SAMPLING mode.

3.3%

AUTO SAMPLING

24.5 C LO1 2% 10% HI2

10 % RANGE

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Bypass Alarms: This feature, separate from CONFIG ALARMS above, enables the user to disable the local audible alarm and relay contacts during calibration or servicing. The alarms are enabled when the alarm condition is corrected.

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight BYPASS ALARMS.

3. The following displays appears:

MAIN MENU

AUTO SAMPLE MANUAL SAMPLE CALIBRATION CONFIG ALARMS

BYPASS ALARMS

4. Press the ENTER key to bypass and disable both the local audible alarm and relay contacts. After 3 seconds, the system returns to SAMPLING mode.

Note: The appropriate alarm setting will alternately reverse shades indicating the alarm condition exists but the BYPASS ALARMS feature has disabled the local audible alarm and relay contact. The alarms are enabled when the alarm condition is corrected.

3.3%

AUTO SAMPLING

24.5 C LO1 2% 10% HI2

10 % RANGE

Installation & Start-up is now complete . . . proceed to Calibration

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Zero Calibration

In theory, the oxygen sensor produces no signal output when exposed to an oxygen free sample gas. In reality, expect the analyzer to generate an oxygen reading when sampling oxygen free sample gas due to:

¾ Contamination or quality of the zero gas ¾ Minor leakage in the sample line connections ¾ Residual oxygen dissolved in the sensor’s electrolyte ¾ Tolerances of the electronic components

Recommendation: Zero calibration is recommended only for online analyzers intended for continuous precise measurements below 0.1% on the 0-1% range and then only when the sample system connections are modified and when installing a new oxygen sensor. It is not practical on higher ranges or portable analyzers for the following reasons:

1. Determining the true zero offset reguires gas as evidenced by a stable reading with no downward trend on an external recording device. Note: Approximately 24-36 hours is required to assure the sensor has consumed the oxygen that has dissolved into the electrolyte inside the sensor while exposed to air or percentage levels of oxygen. For optimum accuracy, utilize as much of the actual sample system as possible.

2. Thus it is not practical to find the true zero offset particularly in the case of applications requiring higher level oxygen measurements because of the low offset value, normally 50% of the most sensitive analysis range, is not material to the accuracy of higher level measurements. Nor is it practical to zero a portable analyzer every time it is moved from one sample point to another.

3. Caution: Prematurely zeroing the analyzer can cause a negative reading in both the ZERO and SAMPLE modes.

4. Satisfying users that the zero offset is reasonably acceptable for their application can be accomplished much quicker. Unless the zero gas is contaminated or there is a significant leak in the sample connections, the analyzer should read less than 1000 ppm oxygen within 2-3 minutes after being placed on zero gas thereby indicating it is operating normally.

Procedure:

Zero calibration should precede the span calibration and once performed should not have to be repeated with subsequent span calibrations. Normally, zero calibrations are performed when a new sensor is installed or changes are made in the sample system connections.

Refer to Span Calibration below for the detailed procedure. Differences include the displays illustrated below, substituting a suitable zero gas for the span gas and the time required to determine the true zero offset of specific oxygen sensor, analyzer and sample system combination.

The maximum zero calibration adjustment permitted is 50% of the lowest full scale range available. Accordingly, the analyzer’s ZERO has not been adjusted prior to shipment because the factory conditions are different from the application condition at the user’s installation.

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.

3. Press the ENTER key to select the highlighted menu option.

4. The following displays appear:

the user allow the analyzer approximately 24 hours to stabilize with flowing zero

MAIN MENU

AUTO SAMPLE MANUAL SAMPLE

CALIBRATION

CONFIG ALARMS BYPASS ALARMS

5. Advance the reverse shade cursor using the ARROW keys to highlight ZERO CALIBRATE.

6. Press the ENTER key to select the highlighted menu option.

7. The following displays appear:

>>>

CALIBRATION

SPAN CALIBRATE

ZERO CALIBRATE

DEFAULT SPAN DEFAULT ZERO OUTPUT SPAN OUTPUT ZERO

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0.000 PPM

ZERO CALIBRTION ENTER TO CALIBRATE MENU TO ABORT

8. Press the ENTER key to calibrate or MENU key to abort and return to SAMPLING mode.

9. Allow approximately 60 seconds for the calibration process while the processor determines whether the signal output or reading has stabilized within 50% of the full scale low range.

10. Both the Zero Calibrate and Span Calibrate functions result in the following displays:

PASSED

CALIBRATION

Default Zero:

The software will eliminate any previous zero calibration adjustment and display the actual the signal output of the sensor at any specific oxygen concentration. For example, assuming a zero gas is introduced, the display will reflect an oxygen reading representing basically the zero calibration adjustment as described above. This feature allows the user to test the sensor’s signal output without removing it from the sensor housing.

Procedure:

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.

3. Press the ENTER key to select the highlighted menu option.

4. The following displays appear:

MAIN MENU

AUTO SAMPLE MANUAL SAMPLE

CALIBRATION

CONFIG ALARMS BYPASS ALARMS

>>>

FAILED

CALIBRATION

SPAN CALIBRATE ZERO CALIBRATE DEFAULT SPAN

DEFAULT ZERO

OUTPUT SPAN OUTPUT ZERO

5. Advance the reverse shade cursor using the ARROW keys to highlight DEFAULT ZERO.

6. Press the ENTER key to select the highlighted menu option.

7. The following display appears and after 3 seconds the system returns to the SAMPLING mode:

FACTORY

DEFAULTS

SET

3.3%

AUTO SAMPLING

10 % RANGE

24.5 C LO1 2% 10% HI2

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Output Zero:

In rare instances the 4-20mA signal output may not agree to the reading displayed by the LCD. This feature enables the user to adjust the 4mA signal output when the LCD displays 00.00. Compute the adjustment value as described in Appendix B or consult the factory.

Note: Adjust the 20mA signal output with the OUTPUT SPAN option described below. The true adjustment value must be determined empirically by trial and error. Adjust the initial adjustment value for additional percent errors.

Procedure:

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.

3. Press the ENTER key to select the highlighted menu option.

4. The following displays appear:

MAIN MENU

AUTO SAMPLE MANUAL SAMPLE

CALIBRATION

CONFIG ALARMS BYPASS ALARMS

>>>

5. Advance the reverse shade cursor using the ARROW keys to highlight OUTPUT ZERO.

6. Press the ENTER key to select the highlighted menu option.

7. The following display appears

100.0

OUTPUT ZERO OFFSET

PRESS UP OR DOWN TO CHANGE VALUE ENTER TO SAVE MENU TO RETURN

8. Compute the adjustment value as described in Appendix B. Note: The true adjustment value must be determined empirically by trial and error. Adjust the initial adjustment value for additional percent errors.

090.0

OUTPUT ZERO OFFSET

PRESS UP OR DOWN TO CHANGE VALUE ENTER TO SAVE MENU TO RETURN

9. Press the ENTER key to advance the underline cursor right or press the MENU key to advance the underline cursor left to reach to the desired digit of the OUTPUT ZERO OFFSET value.

10. Press the ARROW keys to enter the OUTPUT ZERO OFFSET value.

11. Repeat steps 9 and 10 until the complete OUTPUT ZERO OFFSET value has been entered.

12. Save the adjustment value by pressing the ENTER key or abort by pressing the MENU key.

13. The system returns to the SAMPLING mode.

CALIBRATION

SPAN CALIBRATE ZERO CALIBRATE DEFAULT SPAN DEFAULT ZERO OUTPUT SPAN

OUTPUT ZERO

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Span Calibration

Maximum drift from calibration temperature is approximately 0.11% of reading per °C. The analyzer has been calibrated at the factory. However, in order to obtain reliable data, the analyzer must be calibrated at the initial start-up and periodically thereafter. The maximum calibration interval recommended is approximately 3 months, or as determined by the user’s application.

Calibration involves adjusting the analyzer electronics to the sensor’s signal output at a given oxygen standard, e.g. a certified span gas with an oxygen content (balance nitrogen) approximating 80% of the next higher full scale range above the intended measuring range is recommended for optimum accuracy, see Calibration and Accuracy.

Recommendation – based on the inherent linearity of the galvanic oxygen sensor air calibrate the analyzer as described below when installing and replacing the oxygen sensor (exception UHP and MS versions of the Pico Ion Sensor); or, to verify the oxygen content of a certified span gas; or, when a certified span gas is not available (immediately following air calibration reintroduce a gas with a low oxygen concentration to expedite the return to ppm level measurements).

Caution: Prematurely initiating the SPAN CALIBRATION key before the galvanic fuel cell sensor based analyzer reading has stabilized can result in erroneous readings.

For example, to assure an accurate air calibration when installing a new ppm oxygen sensor from its packaged oxygen free atmosphere allow the oxygen sensor 2-3 minutes to reach equilibrium with the oxygen content of the ambient air surrounding it before pressing the SPAN CALIBRATE key. A ppm oxygen sensor that has not been allowed to reach equilibrium will generate a lower current output than a ppm oxygen sensor that has reached equilibrium. Pressing the SPAN CALIBRATE key before the ppm oxygen sensor has reached equilibrium forces the micro-processor to prematurely read the (erroneous low) current output of the ppm oxygen sensor and introduce larger (erroneous) than required electronic gain adjustment and display (also erroneous) CALIBRATION SUCCESSFUL message to the user. The error will become evident when a zero gas with a low oxygen concentration is introduced into the ppm analyzer to purge it down below 10 ppm. The analyzer reading may stop and appear to stabilize as high as 1800 ppm – giving the user the (erroneous) impression there is a problem with the ppm oxygen sensor when in fact the problem lies with the user’s failure to follow the recommended calibration procedure.

Required components: Refer to Installing Span Gas section above.

1. Certified span gas cylinder with an oxygen concentration, balance nitrogen, approximating 80% of the full scale range above the intended measuring range.

2. Regulator to reduce pressure to between 5 and 30 psig.

3. Flow meter to set the flow between 1-5 SCFH,

4. Suitable fittings and a 4-6 ft. in length of 1/8” dia. metal tubing to connect the regulator to the flow meter inlet

5. Suitable fitting and a 4-6 ft. in length of 1/8” dia. metal tubing to connect to the flow meter vent

6. 1/8” male NPT to tube adapter fitting to connect the 1/8” dia. metal tubing from the flow meter vent to the mating male fitting supplied with the GPR-2900.

Procedure:

The user must ascertain that the oxygen reading (actually the sensor’s signal output) has reached a stable value within the limits entered below before entering the span adjustment. Failure to do so will result in an error.

This procedure assumes a span gas under positive pressure and is recommended for a analyzer without an optional sampling pump, which if installed downstream of the sensor should be placed in the OFF position and disconnected so the vent is not restricted during calibration. To assure an accurate calibration, the temperature and pressure of the span gas must closely approximate the sample conditions.

For calibration purposes, use of the AUTO SAMPLE mode is recommended. However, the user can select the full scale MANUAL SAMPLE RANGE for calibration as dictated by the accuracy of the analysis required – for example, a span gas with an 80 ppm oxygen concentration with the balance nitrogen would dictate the use of the 0-100 ppm full scale range for calibration and a 010 ppm measuring range. Select as described above.

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight AUTO SAMPLE.

3. Press the ENTE

4. The following displays appear:

R key to select the highlighted menu option.

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MAIN MENU

AUTO SAMPLE

MANUAL SAMPLE CALIBRATION CONFIG ALARMS BYPASS ALARMS

5. Return to the MAIN MENU by pressing the MENU key.

6. Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.

7. Press the ENTER key to select the highlighted menu option.

8. Repeat to select SPAN CALIBRATE

9. The following displays appear:

3.3%

AUTO SAMPLING

10 % RANGE

24.5 C LO1 2% 10% HI2

MAIN MENU

AUTO SAMPLE MANUAL SAMPLE

CALIBRATION

CONFIG ALARMS BYPASS ALARMS

10. Assure there are no restrictions in vent line.

11. Regulate the pressure and control the flow rate as described above at 5-30 psig and a 2 SCFH flow rate.

12. Allow the span gas to flow for 1-2 minutes to purge the air trapped in the span gas line.

13. Disconnect the sample gas line and install the purged span gas line.

14. Caution: Allow the span gas to flow and wait until the reading is stable before proceedin g with calibration. The wait time will vary depending on the amount oxygen introduced to the sensor when the gas lines were switched.

15. Press the ENTER key to select the SPAN CALIBRATE option.

16. Note: A span gas concentration above 1000 ppm dictates the selection of the PERCENT option.

17. Advance the reverse shade cursor using the ARROW keys to highlight the desired GAS CONCENTRATION.

18. Press the ENTER key to select the highlighted menu option.

GAS CONCENTRATION

PERCENT

PPM

>>>

CALIBRATION

SPAN CALIBRATE

ZERO CALIBRATE DEFAULT SPAN DEFAULT ZERO OUTPUT SPAN OUTPUT ZERO

19. The following displays appear:

000.00 PPM

PRESS UP OR DOWN TO CHANGE VALUE ENTER TO SAVE MENU TO RETURN

20. Press the ENTER key to advance the underline cursor right or press the MENU key to advance the underline cursor left to reach to the desired digit of the alarm value.

21. Press the ARROW keys to enter the alarm value.

22. Repeat steps 20 and 21 until the complete SPAN value has been entered.

>>>

080.00 PPM

SPAN CALIBRATION ENTER TO CALIBRATE MENU TO ABORT

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23. Save the adjustment value by pressing the ENTER key or abort by pressing the MENU key.

24. Allow approximately 60 seconds for the calibration process while the processor determines whether the signal output or reading has stabilized within 60% of the full scale low range. Both the Zero Calibrate and Span Calibrate functions result in the following displays:

25. If the calibration is successful, the analyzer returns to the SAMPLING mode after 30 seconds.

26. If the calibration is unsuccessful, return to the SAMPLING mode with span gas flowing through the analyzer, make sure the reading stabilizes and repeat the calibration before concluding the equipment is defective.

27. Before disconnecting the span gas line and connecting the sample gas line, restart if necessary the flow of sample gas and allow it to flow for 1-2 minutes to purge the air inside the line.

28. Disconnect the span gas line and replace it with the purged sample gas line.

29. Wait 10-15 minutes to ensure the reading is stable and proceed to sampling.

Default Span

The software will set the SPAN adjustment based on the average oxygen reading (actually the sensor’s signal output) at any specific oxygen concentration. For example, when a span gas is introduced, the micro-processor will display an oxygen readin g within + sensor housing.

Procedure:

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.

3. Press the ENTER key to select the highlighted menu option.

4. The following displays appears:

50% of the span gas value. This feature allows the user to test the sensor’s signal output without removing it from the

PASSED

CALIBRATION

FAILED

CALIBRATION

MAIN MENU

AUTO SAMPLE MANUAL SAMPLE

CALIBRATION

CONFIG ALARMS BYPASS ALARMS

5. Advance the reverse shade cursor using the ARROW keys to highlight DEFAULT SPAN.

6. Press the ENTER key to select the highlighted menu option.

7. The following displays appear and after 3 seconds the system returns to the SAMPLING mode:

FACTORY

DEFAULTS

SET

>>>

CALIBRATION

SPAN CALIBRATE ZERO CALIBRATE

DEFAULT SPAN

DEFAULT ZERO OUTPUT SPAN OUTPUT ZERO

3.1%

AUTO SAMPLING

10 % RANGE

24.5 C LO1 2% 10% HI2

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Output Span:

In rare instances the 4-20mA signal output may not agree to the reading displayed by the LCD. This feature enables the user to adjust the 20mA signal output should the LCD display not agree.

Note: Adjust the 4mA signal output with the OUTPUT ZERO option described above.

Procedure:

1. Access the MAIN MENU by pressing the MENU key.

2. Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.

3. Press the ENTER key to select the highlighted menu option.

4. The following displays appear:

MAIN MENU

AUTO SAMPLE MANUAL SAMPLE

CALIBRATION

CONFIG ALARMS BYPASS ALARMS

>>>

CALIBRATION

SPAN CALIBRATE ZERO CALIBRATE DEFAULT SPAN DEFAULT ZERO

OUTPUT SPAN

OUTPUT ZERO

5. Advance the reverse shade cursor using the ARROW keys to highlight OUTPUT SPAN.

6. Press the ENTER key to select the highlighted menu option.

7. The following display appears

100.0

OUTPUT SPAN OFFSET

PRESS UP OR DOWN TO CHANGE VALUE ENTER TO SAVE MENU TO RETURN

8. Compute the adjustment value as described in Appendix B or consult the factory. The true adjustment value must be determined empirically by trial and error. Adjust the initial adjustment value for additional percent errors.

099.0

OUTPUT SPAN OFFSET

PRESS UP OR DOWN TO CHANGE VALUE ENTER TO SAVE MENU TO RETURN

9. Press the ENTER key to advance the underline cursor right or press the MENU key to advance the underline cursor left to reach to the desired digit of the OUTPUT SPAN OFFSET value.

10. Press the ARROW keys to enter the OUTPUT SPAN OFFSET value.

11. Repeat steps 9 and 10 until the complete OUTPUT SPAN OFFSET value has been entered.

12. Save the adjustment value by pressing the ENTER key or abort by pressing the MENU key.

13. The system returns to the SAMPLING mode.

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Sampling

GPR-2900 Oxygen Analyzer requires positive pressure to flow the sample gas by the sensor to measure the oxygen concentration in a sample gas. If not available see Pressure & Flow section.

Note: Prematurely initiating the ZERO CALIBRATION procedure can cause the analyzer to display a negative reading in both the ZERO and SAMPLE modes. Prematurely initiating the SPAN CALIBRATION procedure can cause erroneously high offsets and inaccurate readings.

Procedure:

Following calibration the analyzer returns to the SAMPLE mode after 30 seconds.

1. Select the desired sampling mode - auto or if manual, the range that provides maximum resolution – as described above.

2. Use metal tubing to transport the sample gas to the analyzer.

3. The main consideration is to eliminate air leaks which can affect oxygen measurements above or below the 20.9% oxygen concentration in ambient air - ensure the sample gas tubing connections fit tightly into the 1/8” male NPT to tube adapter, and, the NPT end is taped and securely tightened into the mating male quick disconnect fittings which mate with the female fittings on the analyzer

4. Assure there are no restrictions in the sample line.

5. For sample gases under positive pressure the user must provide a means of controlling the inlet pressure between 5-30 psig and the flow of the sample gas between 1-5 SCFH, a flow rate of 2 SCHF is recommended

6. For sample gases under atmospheric or slightly negative pressure an optional sampling pump is recommended to draw the sample into the analyzer. Generally, no pressure regulation or flow control device is involved.

7. Caution: If the analyzer is equipped with an optional sampling pump and is intended for use in both positive and atmospheric/slightly negative pressure applications where a flow meter valve is involved – ensure the valve is completely open when operating the sampling pump. Refer to the Pressure & Flow section above.

8. Assure the sample is adequately vented for optimum response and recovery – and safety.

9. Allow the oxygen reading to stabilize for approximately 10 minutes at each sample point.

To avoid erroneous oxygen readings and damaging the sensor:

¾ Do not place your finger over the vent (it pressurizes the sensor) to test the flow indicator when gas is flowing to the

sensor. Removing your finger (the restriction) generates a vacuum on the sensor and may damage the sensor (voiding the sensor warranty).

¾ Assure there are no restrictions in the sample or vent lines ¾ Avoid drawing a vacuum that exceeds 14” of water column pressure – unless done gradually ¾ Avoid excessive flow rates above 5 SCFH which generate backpressure on the sensor. ¾ Avoid sudden releases of backpressure that can severely damage the sensor. ¾ Avoid the collection of particulates, liquids or condensation collect on the sensor that cou ld block the diffusion of oxygen

into the sensor.

¾ If the analyzer is equipped with an optional integral sampling pump (positioned downstream of the sensor) and a flow

control metering valve (positioned upstream of the sensor), completely open the flow control metering valve to avoid drawing a vacuum on the sensor and placing an undue burden on the pump.

Standby

¾ The analyzer has no special storage requirements. ¾ The sensor should remain connected during storage periods. ¾ Store the analyzer with the power OFF. ¾ If storing for an extended period of time protect the analyzer, cable and sensor from dust, heat and moisture.

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6 Maintenance

There are no moving parts in the analyzer given the modular nature of the electronics and sensor. Cleaning the electrical contacts when replacing the sensor is the extent of the maintenance requirements of this analyzer.

Sensor Replacement: Periodically, the oxygen sensor will require replacement. The operating life is determined by a number of factors that are influenced by the user and therefore difficult to predict. The sections dealing with Specification and Installation Considerations define the normal operating conditions and expected life of the standard sensor utilized by the GPR-2900 analyzer. Expected sensor life is inversely proportional to changes in oxygen concentration, pressure and temperature.

Procedure:

1. Unscrew the knurled lock ring connecting the cable to the sensor.

2. Disconnect and remove the female plug (including the knurled lock ring) molded to the cable from the male receptacle attached to the old oxygen sensor.

3. Unscrew the old oxygen sensor from the threaded hole in the sensor flow housing.

4. Open the barrier bag containing the new sensor.

5. The new oxygen sensor is equipped with a wire spring type shorting device, remove the shorting wire from the pins of the male receptacle attached to the new oxygen sensor.

6. Line up the registration point of the female plug molded to the cable and male receptacle on the oxygen sensor.

7. Push the female plug (including the knurled lock ring) into the male receptacle attached to the oxygen sensor.

8. Screw and finger tighten the knurled lock ring of the cable plug into to the male connector attached to the sensor.

9. Place the analyzer in the auto ranging mode, as described above.

10. With the sensor exposed to ambient air wait for 5-10 minutes until the reading stabilizes.

11. Perform and air calibration as described above.

12. Screw the new sensor, finger tight plus ¼ turn, into the threaded hole in the flow housing and ensure the o-ring seal is engaged but not ‘crushed’.

13. Begin sampling.

7 Spare Parts

Recommended spare parts for the GPR-2900 Oxygen Analyzer include:

Item No. Description

GPR-11-60-4 Oxygen Sensor XLT-11-24-4 Oxygen Sensor (CO2 background gas)

Other spare parts:

A-2070 Bracket Mount Remote Sensor CONN-1014 Connector 4 Conductor Shielded Cable with Plug A-2568 Housing Flow 1/8 SS Tube Fittings MTR-1011 Meter Digital Panel LCD Backlight A-2781 Nut Retain Remote Sensor A-1161-A2 PCB Assembly Main / Display A-1162-AC PCB Assembly AC Power Supply / Interconnection A-1162-DC PCB Assembly AC Power Supply / Interconnection

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8 Troubleshooting

Symptom Possible Cause Recommended Action

Reading does not reflect expected values

Oxygen reading drifts toward zero or significant number of turns of the span control adjustment is required to calibrate the analyzer.

Slow response time Erratic oxygen reading No oxygen reading

High oxygen reading

Sensor was not calibrated at the pressure, flow rate and temperature anticipated in the sample gas stream

Indication sensor is nearing the end of its useful life

Liquid covering sensing membrane Presence of interference gases. Unauthorized maintenance Defective electrical connection Sensor failure

Inadequate control of pressure and flowrate

Abnormality in span gas

Recalibrate the analyzer using the known oxygen content of ambient air, 20.9%, and if the sensor responds we should presume it is correct.

Replace sensor

Gently remove with alcohol and lint free towel. Consult factory, replace sensor

Use voltmeter and determine uA or mV output and contact factory.

See Installation Considerations, section 5

Qualify source by recalibrating the analyzer with the known oxygen content of ambient air, 20.9%

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9 Warranty

The design and manufacture of GPR Series oxygen analyzers, monitors and oxygen sensors are performed under a certified Quality Assurance System that conforms to established standards and incorporates state of the art materials and components for superior performance and minimal cost of ownership. Prior to shipment every analyzer is thoroughly tested by the manufacturer and documented in the form of a Quality Control Certification that is included in the Owner’s Manual accompanying every analyzer. When operated and maintained in accordance with the Owner’s Manual, the units will provide many years of reliable service.

Coverage

Under normal operating conditions, the monitor, analyzers and sensor are warranted to be free of defects in materials and workmanship for the period specified in accordance with the most recent published specifications, said period begins with the date of shipment by the manufacturer. The manufacturer information and serial number of this analyzer are located on the rear of the analyzer. Advanced Instruments Inc. reserves the right in its sole discretion to invalidate this warranty if the serial number does not appear on the analyzer.

If your Advanced Instruments Inc. monitor, analyzer and/or oxygen sensor is determined to be defective with respect to material and/or workmanship, we will repair it or, at our option, replace it at no charge to you. If we choose to repair your purchase, we may use new or reconditioned replacement parts. If we choose to replace your Advanced Instruments Inc. analyzer, we may replace it with a new or reconditioned one of the same or upgraded design. This warranty applies to all monitors, analyzers and sensors purchased worldwide. It is the only one we will give and it sets forth all our responsibilities. There are no other express warranties. This warranty is limited to the first customer who submits a claim for a given serial number and/or the above warranty period. Under no circumstances will the warranty extend to more than one customer or beyond the warranty period.

Limitations

Advanced Instruments Inc. will not pay for: loss of time; inconvenience; loss of use of your Advanced Instruments Inc. analyzer or property damage caused by your Advanced Instruments Inc. analyzer or its failure to work; any special, incidental or consequential damages; or any damage resulting from alterations, misuse or abuse; lack of proper maintenance; unauthorized repair or modification of the analyzer; affixing of any attachment not provided with the analyzer or other failure to follow the Owner’s Manual. Some states and provinces do not allow limitations on how an implied warranty lasts or the exclusion of incidental or consequential damages, these exclusions may not apply.

Exclusions

This warranty does not cover installation; defects resulting from accidents; damage while in transit to our service location; damage resulting from alterations, misuse or abuse; lack of proper maintenance; unauthorized repair or modification of the analyzer; affixing of any label or attachment not provided with the analyzer; fire, flood, or acts of God; or other failure to follow the Owner’s Manual.

Service

Call Advanced Instruments Inc. at 909-392-6900 (or e-mail info@aii1.com) between 7:30 AM and 5:00 PM Pacific Time Monday thru Thursday or before 12:00 pm on Friday. Trained technicians will assist you in diagnosing the problem and arrange to supply you with the required parts. You may obtain warranty service by returning you analyzer, postage prepaid to:

Advanced Instruments Inc. 2855 Metropolitan Place Pomona, Ca 91767 USA

Be sure to pack the analyzer securely. Include your name, address, telephone number, and a description of the operating problem. After repairing or, at our option, replacing your Advanced Instruments Inc. analyzer, we will ship it to you at no cost for parts and labor.

Advanced Instruments Inc.

10 MSDS Material Safety Data Sheet

Product Identification

Product Name Oxygen Sensor Series - PSR, GPR, AII, XLT Synonyms Electrochemical Sensor, Galvanic Fuel Cell Manufacturer Analytical Industries Inc., 2855 Metropolitan Place, Pomona, CA 91767 USA Emergency Phone Number 909-392-6900 Preparation / Revision Date January 1, 1995 Notes Oxygen sensors are sealed, contain pro tective cov erings and in normal c onditions do not present a

Specific Generic Ingredients

Carcinogens at levels > 0.1% None Others at levels > 1.0% Potassium Hydroxide or Acetic Acid, Lead CAS Number Potassium Hydroxide = KOH 1310-58-3 or Acetic Acid = 64-19-7, Lead = Pb 7439-92-1 Chemical (Synonym) and Family Pota ss ium Hydroxide (KOH) – Base or Acetic Acid (CH

General Requirements

Use Potassium Hydroxide or Acetic Acid - electrolyte, Lead - anode Handling Rubber or latex gloves, safety glasses Storage Indefinitely

Physical Properties

Boiling Point Range Melting Point Range Freezing Point Molecular Weight KOH = 56 or Acetic Acid – NA, Lead = 207 Specific Gravity Vapor Pressure Vapor Density KOH – NA or Acetic Acid = 2.07 pH KOH > 14 or Acetic Acid = 2-3 Solubility in H % Volatiles by Volume None Evaporation Rate Similar to water

Appearance and Odor Aqueous solutions: KOH = Colorless, odorless or Acetic Ac id = Colorless, vinegar-like odor

O Complete

Fire and Explosion Data

Flash and Fire Points Not applicable Flammable Limits Not flammable Extinguishing Method Not applicable Special Fire Fighting Procedures Not applicable Unusual Fire and Explosion Hazards Not applicable

Reactivity Data

Stability Stable Conditions Contributing to Instability None Incompatibility KOH = Avoid contact with strong acids or Acetic Acid = Avoid contact with strong bases Hazardous Decomposition Products KOH = None or Acetic Acid = Emits toxic fumes when heated Conditions to Avoid KOH = None or Acetic Acid = Heat

health hazard. Information applies to electrolyte unless otherwise noted.

H) – Acid, Lead (Pb) – Metal

3CO2

KOH = 100 to 115° C or Acetic Acid = 100 to 117° C KOH -10 to 0° C or Acetic Acid – NA, Lead 327° C KOH = -40 to -10° C or Acetic Acid = -40 to -10° C

KOH = 1.09 @ 20° C, Acetic Acid = 1.05 @ 20° C KOH = NA or Acetic Acid = 11.4 @ 20° C

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Spill or Leak

Steps if material is released Sensor is packaged in a sealed plastic bag, check the sensor inside for electrolyte leakage. If the

Disposal

Health Hazard Information

Primary Route(s) of Entry Ingestion, eye and skin contact Exposure Limits Potassium Hydroxide - ACGIH TLV 2 mg/cub ic meter or Acetic Acid - ACGIH TLV / OSHA PEL 10

Ingestion Electrolyte could be harmful or fatal if swallowed. KOH = Oral LD50 (RAT) = 2433 mg/kg or Acetic

Eye Electrolyte is corrosive and eye contact could result in permanent loss of vision. Skin Electrolyte is corrosive and skin contact could result in a chemical burn. Inhalation Liquid inhalation is unlikely. Symptoms Eye contact - burning sensation. Skin contact - soapy slick feeling . Medical Conditions Aggravated None Carcinogenic Reference Data KOH and Acetic Acid = NTP Annual Report on C arcinogens - not listed; LARC Monographs - not

Other Lead is listed as a chemical known to the State of California to cause birth defects or other

Special Protection Information

Ventilation Requirements None Eye Safety glasses Hand Rubber or latex gloves Respirator Type Not applicable Other Special Protection None

Special Precautions

Precautions Do not remove the sensor’s protective Teflon and PCB coverings. Do not probe the sensor with

Transportation Not applicable

sensor leaks inside the plastic bag or inside an analyzer sensor housing do not remove it without rubber or latex gloves and safety glasses and a source of water. Flush or wipe all surfaces repeatedly with water or wet paper towel (fresh each time).

In accordance with federal, state and local regulations.

ppm (TWA), Lead - OSHA PEL .05 mg/cubic meter

Acid = Oral LD50 (RAT) = 6620 mg/kg

listed; OSHA - not listed

reproductive harm.

sharp objects. Wash hands thoroughly after ha nd ling. Avoid contact with eyes, skin and clothing. Empty sensor body may contain hazardous residue.

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Appendix B

Correlating Readings - LCD Display and 4-20mA Output

In rare instances the 4-20mA signal output may not agree to the reading displayed by the LCD. The Output Zero and Output Span features enable the user to adjust the 4mA signal output to correlate with the reading displayed by the LCD.

For optimum accuracy make two separate adjustments as follows:

1. OUTPUT ZERO feature: To adjust the 4mA signal output and requires zero gas.

2. OUTPUT SPAN feature: To adjust the 20mA signal output and requires span gas near full range.

In the field or in the absence of the preferred gases, use the OUTPUT SPAN feature and adjust the 20mA signal output using the span gas available.

Procedure – regardless of type of adjustment:

1. The microprocessor defaults to 100% to start.

2. The “actual” 4-20mA signal output will be adjusted to the “theoretical” value of the LCD display.

3. Adjustment general rule:

a) If the actual 4-20mA value < the theoretical LCD value, the adjustment value will be > 100%. b) If the actual 4-20mA value > the theoretical LCD value, the adjustment value will be < 100%.

4. Convert the “actual” reading of the LCD display to the “theoretical” 4-20mA as follows:

a) Divide the “actual” (ppm or percent) LCD reading by the value of the span gas available. b) Multiply 16mA (20mA – 4mA) times the “result of a.” c) Add 4mA plus the “result of b.” to obtain the “theoretical” 4-20mA signal output value.

5. Adjustment value: Divide the theoretical by the actual 4-20mA values and multiply by 100.

6. Enter the adjustment value via OUTPUT ZERO or OUTPUT SPAN routines described below.

Example: Analyzer reading is 60 ppm oxygen (100 ppm range) on 84 ppm span gas, 4-20mA signal output at PLC is 24mA Solution: a) Use OUTPUT SPAN feature to make the adjustment.

b) Adjustment will be < 100% (default value of OUTPUT SPAN feature). c) 13.6mA is the “theoretical” 4-20mA converted from the “actual” reading of the LCD. 60 ppm divided by 84 ppm = 0.71 or 71% 16mA multiplied by 0.71 = 11.36mA 4mA plus 11.36mA = 15.36mA “theoretical” 4-20mA signal output value d) 15.36mA divided by 24mA the “actual” 4-20mA value = 64.0 adjustment value e) Enter 64.0 via OUTPUT SPAN procedure below.

Output Zero

7. Access the MAIN MENU by pressing the MENU key.

8. Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.

9. Press the ENTER key to select the highlighted menu option.

10. The following displays appear:

MAIN MENU

AUTO SAMPLE MANUAL SAMPLE

CALIBRATION

>>>

CALIBRATION

SPAN CALIBRATE ZERO CALIBRATE DEFAULT SPAN DEFAULT ZERO OUTPUT SPAN

OUTPUT ZERO

11. Advance the reverse shade cursor using the ARROW keys to highlight DEFAULT ZERO.

12. Press the ENTER key to select the highlighted menu option.

13. The following display appears:

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100.0

OUTPUT ZERO OFFSET

PRESS UP OR DOWN TO CHANGE VALUE ENTER TO SAVE MENU TO RETURN

14. Enter the calculated adjustment value. Note: Once the initial adjustment is made and checked at the PLC it may be necessary to fine tune the initial adjustment by repeating. Any additional percent error must be added or subtracted from the initial adjustment value

000.0

OUTPUT ZERO OFFSET

PRESS UP OR DOWN TO CHANGE VALUE ENTER TO SAVE MENU TO RETURN

15. Press the ENTER key to advance the underline cursor right or press the MENU key to advance the underline cursor left to reach to the desired digit of the adjustment OUTPUT ZERO OFFSET value.

16. Press the ARROW keys to enter each the numerical value of each digit of the adjustment OUTPUT ZERO OFFSET value.

17. Repeat until the complete OUTPUT ZERO OFFSET value has been entered.

18. Save the adjustment value by pressing the ENTER key or abort by pressing the MENU key.

19. The system returns to the SAMPLING mode.

Output Span

20. Access the MAIN MENU by pressing the MENU key.

21. Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.

22. Press the ENTER key to select the highlighted menu option.

23. The following displays appear:

MAIN MENU

AUTO SAMPLE MANUAL SAMPLE

CALIBRATION

24. Advance the reverse shade cursor using the ARROW keys to highlight OUTPUT SPAN.

25. Press the ENTER key to select the highlighted menu option.

26. The following display appears:

100.0

OUTPUT SPAN OFFSET

PRESS UP OR DOWN TO CHANGE VALUE ENTER TO SAVE MENU TO RETURN

>>>

CALIBRATION

SPAN CALIBRATE ZERO CALIBRATE DEFAULT SPAN DEFAULT ZERO

OUTPUT SPAN

OUTPUT ZERO

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27. Enter the calculated adjustment value, refer to example described above. Note: Once the initial adjustment is made and checked at the PLC it may be necessary to fine tune the initial adjustment by repeating. Any additional percent error must be added or subtracted from the initial adjustment value

064.0

OUTPUT SPAN OFFSET

PRESS UP OR DOWN TO CHANGE VALUE ENTER TO SAVE MENU TO RETURN

28. Press the ENTER key to advance the underline cursor right or press the MENU key to advance the underline cursor left to reach to the desired digit of the adjustment OUTPUT SPAN OFFSET value.

29. Press the ARROW keys to enter the numerical value of each digit of the OUTPUT SPAN OFFSET value.

30. Repeat until the complete OUTPUT SPAN OFFSET value has been entered.

31. Save the adjustment value by pressing the ENTER key or abort by pressing the MENU key.

32. The system returns to the SAMPLING mode.

Analytical Industries Inc (AII) GPR-2900 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual