Advanced Instruments GPR-2500 A Manual (ATEX)

Technical Specifications *

Accuracy: < 2% of FS range under constant conditions

Analysis:

Application:

Area Classification: General purpose
Alarms:

Calibration:

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

Display:

Enclosure: Fiberglass NEMA 4X, 4 x 9 x 3", 8 lbs.
Flow Sensitivity: Not flow sensitive, 1-2 SCFH recommended
Linearity: ±1% of full scale
Pressure:

Power: 12-28 VDC non-loop or 110-220 VAC

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

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

Two user configurable alarms: magnetic coil relays rated
3A at 100 VAC, field programmable alarm time delays,
alarm bypass for calibration and system fail alarm

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 and system functions

Graphical LCD 2.75” x 1.375”; resolution 0.001%;
displays real time ambient temperature and pressure

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

GPR-2500 A

Oxygen Analyzer

12-24 VDC Non-Loop or 110-220 VAC

Powered Oxygen Analyzer

Advanced Galvanic Sensor Technology with

Optional Sample Systems

Response Time: 90% of final reading in 13 seconds
Sample System: None

Sensitivity: < 0.5% of FS range
Sensor Model:

Sensor Life:

Signal Output: 4-20mA non-isolated or 1-5V; optional Modbus
Operating Range: 5ºC to 45ºC (GPR sensor), -10º to 45ºC (XLT sensor)

Warranty: 12 months analyzer; 12 months sensor
Wetted Parts: Stainless steel

Optional Equipment

Sample conditioning system - Contact factory.

* Subject to change without notice

2855 Metropolitan Place, Pomona, CA 91767 USA ♦ Tel: [phone], Fax: [phone], www.aii1.com, e-mail: [email protected] Rev 10/15

GPR-11-32-4 for non-acid (CO2) gas streams;
XLT-11-24-4 for gases containing > 0.5% CO2

GPR-11-32-4 32 months in air at 25ºC and 1 atm
XLT-11-24-4 32 months in air at 25ºC and 1 atm

2 Field Selectable Alarm Setpoints
12-24 VDC or 110-220 VAC Power
4-20 mA Signal Output
Sensitivity 0.5% Full Scale
4 Ranges Standard
Auto Ranging or Single Fixed
Stainless Steel Wetted Parts

ISO 9001:2008 Certified

INTERTEK Certificate No. 485

Advanced Instruments, Inc.

2855 Metropolitan Place, Pomona, CA 91767 USA ♦ Tel: [phone], Fax: [phone], e-mail: info@aii2 .com, www.aii2.com

GPR-2500A
% Oxygen Transmitter

Owner’s Manual

Revised June 2014

Table of Contents

1

2

3

4

5

6

7

8

9

10

A/R

Introduction
Quality Control Certification
Safety
Features & Specifications
Operation
Maintenance
Spare Parts
Troubleshooting
Warranty
Material Safety Data Sheets

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Drawings

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1. Introduction

Your new oxygen transmitter incorporated an advanced electrochemical sensor specific to ox ygen along
with state-of-the-art digital electronics designed to give you years of reliable precise oxygen
measurements in a variety of industrial oxygen applications.

To obtain maximum performance from your new oxygen transmitter, please read and follow the
guidelines provided in this Owner’s Manual.

Every effort has been made to select the most reliable state of the art materials and components, to
design the transmitter for superior performance and minimal cost of ownership. This transmitter was
tested thoroughly by the manufactur er prior to shipment for best performance.

However, all electronic devices do require service from time to time. The warranty included herein plus a
staff of trained professional technicians to quickly service your transmitter is your assurance that we
stand behind every transmitter sold.

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

Serial Number : _______________________

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

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2. Quality Control Certification

Date:

Customer: Order No.:

Pass

Model:

GPR-2500A Oxygen Transmitter

( ) XLT-11-24-4 oxygen Sensor

______________________

Accessories:

Owner’s Manual

Configuration:

A-1161-AIS-2 Rev C4 PCB Assembly Main Processing

A-1166-AIS-2 Rev H PCB Assembly Alarms/Power Connection

Software rev:

Ranges: 0-1%, 0-5%, 0-10%, 0-25%

Power: 12-24V DC

Barometric pressure and temperature compensation

NEMA 4X rated wall mount enclosure

Test:

Pass

Pass

Set default zero

Set default span @ 40uA

Alarm delay

Zero calibration

Alarm bypass

ALARM 2

Analog signal output 4-20mA full scale

Alarm function; ALARM 1, ALAR M 2

10-50% FS

period

defects

Options:

Notes:

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Sensor: ( ) GPR-11-32-4 Oxygen Sensor

Serial Nos.: Transmitter ______________________ Sensor

Span Calibration Alarm configurations; ALARM 1,

Calibrates with adequate span adjustment within

Baseline drift on zero gas < ± 2% FS over 24 hour

Noise level < ± 1.0% FS

Alarm relays; ALARM 1, ALARM 2

Alarm system fail, dry contact

Overall inspection for physical

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3. Safety

General

This section summarizes the essential pre cautions applicable to the GPR-2500A Oxygen Transmitter.
Additional precautions specific to individual transmitter are contained in the following sections of this
manual. To operate the transmitter 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 symbo l is used througho ut the Owner’s Manual to identify sources of
immediate danger such as the presence of hazardous voltages.

Read Instructions: Before operating the transmitter 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 transmitter, 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 transmitter.

Pressure and Flow

Inlet Pressure: GPR-2500A Oxygen Transmitters are designed for flowing samples, equipped with 1/8”

bulkhead tube fitting connections on the side of the unit (unless otherwise indicated, either fitting can
serve as inlet or vent) and are intended to operate at positive sample pressure regulated between 5-30
psig.

Caution: If equipped w ith a H2S scrubber as part of an optional sample conditioning system,
inlet pressure must not exceed 30 psig.

Outlet Pressure: The sample gas must be vented to atmosphere or vent pipe with atmospheric
pressure.

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. A vo id 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 of the Transmitter: The transmitter is approved for indoor or outdoor use. Mount the
transmitter on a flat surface.

Power Requirement: Supply power to the transmitter only as rated by the specification or markings on
the transmitter enclosure. The wiring that connects the transmitter to the power so urce 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 transmitter. Never yank wiring to remove it
from an outlet or from the transmitter.

0

Operating Temperature: The maximum operating temperature is between 0

C to 45º C.

Heat: Situate and store the transmitter away from sources of heat.
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Liquid and Object Entry: The transmitter 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 transmitter.

Handling: Do not use force when using the switches or terminal blocks. Before moving your transmitter,
be sure to disconnect the wiring/power cord and any cables connected to the output terminals located on
the transmitter.

Maintenance

Serviceability: Except for replacing the oxygen sensor, there are no parts inside the transmitter for the

operator to service.
Only trained personnel with the authorization of their supervisor should conduct maintenance.
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. A vo id 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.

Troubleshooting: Consult the gui delines in Section 8 for advice on the common operating errors before
concluding that yo ur transmitter is faulty.

Do not attempt to service the transmitter 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 1 0 and may result in
electrical shock, injury or damage. All other servicing should be referred to qualified service personnel.

Cleaning: The transmitter should be cleaned only as recommended by the manufacturer. Wipe off dust
and dirt from the out sid e of the unit with a soft damp cloth then dr y imm ediately. Do not use solvents or
chemicals.

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

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4. Features and Specification

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5. Operation

Principle of Operation

The GPR-2500A oxygen transmitter incorporates a variety of advanced galvanic fuel cell type sensors.
The transmitter is a compact efficient package configured with the oxygen sensor and separate circuit
boards for signal processing and terminals for incoming power, power supply, signal output and alarm
relay contacts housed in a general purpose NEMA 4X rated enclosure.

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

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. Oxygen readings may
be recorded by an external device via the 0-1V signal output jack.

The circuit for the 4-20mA signal output and two adjustable alarms is powered by a DC/DC transformer
that requires a 12-24VDC power source a nd separate wiring for the signal outputs.

Caution: A loop power source is not sufficient to power this transmitter. Further, the 4-20mA signal
output does not require any external power (applying power to 4-20 mA terminal will permanently

damage the transmitter and void transmitter warranty).

Sample System

The GPR-2500A is supplied without a sample conditioning system thereby giving users the opt ion of
adding their own or purchasing a factory designed sample conditioning system. Whatever the choice, the
sample must be properly presented to the sensor to ensure an accurate measurement. Users interested
in adding their own sample conditioning system sho uld consult the factory. 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

Pressure and Flow Consideration
All electrochemical oxygen sensors respond to partial pressure changes in oxygen. The inlet pressure

must always be higher than the pressure at the outlet vent which is normally at atmospheric pressure.

Flow-Through Configuration

The sensor is exposed to sample gas that must flow or be drawn through the sensor housing inside the
transmitter. The GPR-2500A internal sample system in cludes 1/8” compression tube sample inlet and
vent fittings, a Delrin or optio nal stainless steel sensor housing.

[email protected]

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Delrin Senor Housing with sensor installed.

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 of the two tube fitting connectors can serve as the inlet or vent.

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
1-2 SCFH or 0.4-1 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) genera tes a vacuum on the sensor and may damage

the sensor (voiding the sensor warranty).

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. If necessary, a pressure regula tor (pressure regulator
with a metallic diaphragm is recommended for optimum accuracy, the use 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.

Caution: If equipped with a H2S scrubber as part of an optional sample conditioning system, inlet
pressure must not exceed 30 psig.

Application Pressure - Atmospheric or Slightly Nega t iv e :

For accurate oxygen measurements, an optional external sampling pump should be positioned upstream
of the sensor to draw the sample from the process and push it through the sensor housing and out to
atmosphere. A flow meter is not necessary if the discharge of the sampling pump approximates the
recommended 1-2 SCFH flow rate.

If pump loading is a consideration, a second throttle valve on the pump’s inlet side may be necessary to
provide a bypass path so the sample flow rate is within the above parameters.

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To avoid erroneous oxygen readings and damage to the sensor:

• Do not place your finger over the vent (it press urizes the sensor) to test the flow indicator whe n
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).

• Assure there are no restrictions in the sample or vent lines

• Avoid drawing a vacuum that exceeds 14” of water column pressure – unless done gradually

• Avoid excessive flow rates above 5 SCFH which generate backpressure on the sensor.

• Avoid sudden releases of backpressure that can severely damage the sensor.

• Avoid the collection of particulates, liquids or condensation collect on the sensor that could block

the diffusion of oxygen into the sensor.

• If the transmitter 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 mete r ing valve to avoid drawing a vacuum on the sensor and placing an
undue burden on the pump.

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Choices of Calibration & Accuracy

Single Point Calibration: As previously described the galvanic oxygen sensor genera tes an electrical

current sensor exhibiting 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, sing le 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 o f the sa mple 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 ar e 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 +5% (over the recommended operating temperature range) or better and
generates an output signal that is relatively independent of temperature. Note: 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 temper ature variations of 10-15º produce < +1% error .

Accuracy: In light of the above parameters, the overall accuracy of an transmitter is affected by two
types of errors: 1) those produci ng 'percent of reading errors', illustrated by Graph A below, such as +
temperature compensation
to make span adjustments and 2) thos e producing 'percent of full scale errors', illustrated by Graph B,
such as +1-2% linearity errors in readout devices, which are really minimal due to today's 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 transmitter's
overall accuracy statement of +2% of full scale at constant temperature or +5% over the operating
temperature range. QC testing is typically <+0.5% prior to shipment.

circuit, tolerances of range resistors and the 'play' in the potentiometer used

5%

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Example: 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.

Recommendation: Calibrating with a span gas approximating 80% of the full scale range one or two
ranges higher than the full scale range of interest is recommended for 'optimum c alibration accuracy'.
Always calibrate at the same temperature and pressure of the sample gas stream.

Starting-up the Analyzer

The GPR-2500A Oxygen Transmitter has been tested, calibrated at the factory prior to shipment with the
sensor installed and is fully operational from the shipping container. Allow the transmitters to stabilize for
30 minutes and then recalibrate the device as instructed below.

Installation Considerations

The GPR-2500A consists of two circuit boards, sensor housing and sample 1/8” sample inlet and vent
connections housed in a NEMA 4X rated enclosure and is suitable for mounting on any vertical flat
surface.

For optimum accuracy zero and calibrate a transmitter after it has been allowed to stabilize, typically 24­36 hours after installation. Assuming the initial zero is performed according to the procedure described
herein, the analyzer should not require zeroing again until the either the sensor is replaced or a change is
made to the sample system or gas lines. Following the initial zero and calibration, the analyzer should not
require span calibration again for up to 3 months under “normal” application conditions as described in
the published specifications.

Note: As described below, zeroing the transmitter is recommended only for measurements below 1%
and not practical for measurement ranges above 1%. The low end sensitivity (zero capability) has been
verified at the factory; however, no ZERO OFFSET adjustment has been made. A factory adjustment
would be meaningless because of the difference in sample systems and leakage factors between the
factory set-up and the actual application conditions.

Assemble the necessary hardware for mounting the transmitter and optional components - such as
coalescing or particulate filters and pumps, 1/8” metal or plastic tubing for interconnecting the
transmitter and optional components.

Temperature: The sample must be sufficiently cooled before it enters the transmitter 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 as described above

Moisture & Particulates: Prevent water and/or particulates from entering the sample system. They can
clog the tubing and damage the optional components such as pumps, scrubbers or sensors. Insta llation
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. Consult the factory for recommendations concerning the proper selection and
installation of components.

Contaminant Gases: A gas scrubber and flow indicator with integral metering valve are required
upstream of the transmitter to remove interfering gases such as oxides of sulfur and nitrogen or
hydrogen sulfide that can produce false readings and reduce the expected life of the sensor. 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 optiona l components. Cons ult the factory for
recommendations concerning the proper selection and installatio n of components.

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Mounting Pads

Gas Connections: Inlet and outlet vent gas lines require 1/8” diameter tubing preferably metal.
Power Connection: Locate a source of AC power to meet area classification and to plug in the charging

adapter.
Zero Calibration: Required only for very low percentage range measurements, less than 5% of full

scale at the most sensitive range of the analyzer.
Span Calibra ti o n: Users are responsible for certified spa n ga s cylinder, regulator and flow control valve.

The analyzer must be calibrated with a certified span gas and regular intervals, typically every 30 days of
operation.

Mounting the Analyzer

The GPR-2500A is housed in a Fiber Glass NEMA4X rated enclosure. This configuration is designed to be
mounted directly to any flat vertical surface, wall or bulkhead plate with four (4 ) of the appropriate size
screws. To facilitate servicing the interior of the transmitters, position it approximately 5 feet off ground
level.

• Loosen the four mounting pads at the rear of the enclosure.

• Select four appropriate mounting screws (customer supplied).

• Secure the enclosure to a vertical surface approximately 5 feet from the floor or a level accessible

to service personnel. This requires the user to supply four (4) additional proper size screws and
anchors.

Caution: Do not remove or discard the gaskets from either the enclosure or junction box.
The transmitters design provides protection from RFI that is maintained by leaving specific

mating areas of the enclosure unpai nted to maintain conductivity of the gasket, top and
bottom sections of the smaller enclosure housing the electronics. These unpainted areas are protected by
gaskets and contribute to maintaining the NEMA 4 rating as well as protection from RFI/EMI. Do no t paint
these areas.

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Sample Vent

Sample In

Gas Connections

The GPR-2500A with its standard flow through configuration is designed for positive pressure samples
and requires connections for incoming sample a nd outgoing vent lines. T he user is responsible for
calibration gases and other 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 1-2 SCFH or 0.4-1 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).

Procedure of Connecting Sample Gas:

• Designate one of the bulkhead tube fittings as the VENT and the other as SAMPLE.

• Regulate the sample/span gas pressure to 5-30 PSIG.

• Connect a 1/8” vent line to the compression fitting to be used for venting the sample.

• Connect a 1/8” ZERO, SPAN or SAMPLE line to the fitting designated SAMPLE.

• If equipped with optional fittings and/or sample system, connect the ZERO and or SPAN gas

lines.

• Allow gas to flow through the transmitters and set the flow rate to 1-2 SCFH.

Installing the Oxygen Sensor

• Loosen the two (2) anchors securing the top lid of the enclosure.

• Remove the oxygen sensor from the bag.

• Screw the oxygen sensor into the sensor flow-through housing, finger tighten plus one half (1/4)

turn to ensure a good seal from the o-ring affixed to the sensor.

• Remove the shorting device (looped wire) from the receptacle located at the rear of the sensor.

• Assure the keyway registration of the female plug on the cable and male receptacle on the

sensor match up.

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• Push the female plug on to the sensor mating connector

• Screw the knurled lock nut (attached to the cable) onto to the male connector (attached to the

sensor), tighten finger tight.

• Close the front cover of the transmitter and ensure that the gasket remains in place to maintain
CE approval and NEMA 4 rating.

• Secure the lid by the two (2) anchors

Proceed to calibration (see below for details).

Remote Oxygen Sensor:

Applications requiring the sensor to be located remotely from the electronics dictate
the separate packaging and shipment of the electronics enclosure, oxygen sensor and
sensor flow-trough housing. The appropriate length of cable to connect the sensor to
the electronics is supplied and connected to the electronics. To install the remote
sensor:

• Locate the sensor flow housing and note the thro ugh holes in the flanged
sections.

• Identify the spot for installation.

• Using two (2) 6/32 screws of the appropriate type and length secure the

sensor flow-through housing to a flat surface.

• Remove the oxygen sensor from the bag.

• Screw the oxygen sensor into the sensor flow housing (finger tighten plus

one quarter 1/4 turn to ensure a good seal between the o-ring af fi xed to the
sensor and the sensor housing.

• Remove the shorting device (looped wire) from the receptacle located at the
rear of the sensor.

• Assure the keyway registration of the female plug on the cable and male receptacle on the
sensor match up.

• Push the female plug (including the knurled lock nut) molded to t he cable into the male
receptacle of the sensor.

• Screw the knurled lock nut (attached the cable) onto to the male connector (attached to the
sensor), tighten finger tight.

Proceed to calibration (see below for details).

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Two user selectable Alarms

12-24 VDC Power In

Power Fuse

4-20 mA Signal

Power Fail Alarm

Electrical Connections

All electrical connections are located in a small jun ction box located on the side of the larger enclosure.
Power at the specified rating must be supplied via a two wire shielded cable. A safety fuse is also
mounted in the junction box.

Do not supply power beyond the rating. Failure to do so may permanently damage the
analyzer.

The integral 4-20mA converter is internally powered and does not require external power. DO
NOT supply any voltage to either of the two terminals of the 4-20mA output connector. Failure
to do so will permanently damage the 4-20mA converter .

Procedure

• Remove the front cover of the junction box located on left side of the transmitters by removing
the four (4) screws securing the cover and set them aside for reinstallation.

• Loosen the nut of the cable gland (customer provide and mounted at the bottom of the smaller
enclosure).

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Sensor installed

• Insert power and alarm and signal output wires through the cable gland. Strip ~ ¼ inch of the
wires. Insert the stripped end of wires to the appropriate terminals and secure them by
tightening the screws of the terminal block. Note: Use wires that comply with local regulatory
requirements.

• Thread the wires through the cable gland into the i nside of the junction box.

• Ensure the positive and negative terminals of the power supply are connected to the appropriate

terminals.

• If using shielded cables, connect the shielding of the cable to the copper ground screw inside the
junction box.

• Replace the junction box cover ensuring the gaskets are in place and tighten the four ( 4) screws.

• Tighten the cable gland to maintain NEMA 4 rating .

Installation of Oxygen Sensor

The GPR-2500A Oxygen Transmitter is normally equipped with an integra l oxygen sensor. It has been
tested and calibrated by the manufacturer prior to shipment and are fully operational from the shipping
container. However, when the application requires a remote sensor (external to the electronics enclosure)
or other special circumstances, the oxygen sensor will be packaged separately and must be installed prior
to operating the transmitter. If the sensor has not been installed at the factory, it will be necessary to
install the sensor in the field.

Delrin Housing with Oxygen

Note: All transmitters must be calibra ted once the installation has been completed and periodically
thereafter as described below. Following the i nitial installation and calibration, allow the transmitters to
stabilize for 24 hours and perform a calibration again with a certified span gas.

Caution: DO NOT open the oxygen sensor. The se nsor 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.

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Span Calibration

Span Gas Preparation

One of the most accurate, reliable and inexpensive means of calibrating the GPR-2500A is to expose the
sensor to the 20.9% oxyg en content fou nd in ambient air. However, exposing the sensor to ambient air
with the GPR-2500A flow th rough configuration requires opening the enclosure and unscrewing the
sensor from its flow housing. However, many users opt to calibrate with a certified span gas which
requires additional components and time.

Caution: When using a certified span gas from a span gas cylinder, do not contaminate the span gas
cylinder when connecting the pressure regulator. When installing the pressure regulator, bleed the air
filled regulator to flush air from the regulator before securing it on the cylinder. When using a span gas,
always bleed the pressure regulator before opening the span gas to the analyzer (this requires a bypass
valve at the exit of the pressure regulator valve).

Note: Always use a certified span gas with an oxygen concentration, balance nitrogen, ap proximating
50-80% of the full scale range of interest or one range above the intended measuring range. You will
require the following components to deliver a span gas to the analyzer/transmitter.

Set the span gas pressure as close as possible t o t he sample gas pressure. This will assure a smooth shift
from sample to span or vise versa without the need to readjust the gas flow rate.

18

Advanced Instruments, Inc.

12-24 VDC Power In

REV 2.15

Establishing Power to Electronics

Once the two wires bringing power to the transmitter are properly connected to the terminals inside the
junction box, the digital display responds instantaneously. At power-up, the transmitter performs several
diagnostic system status checks termed “START-UP TEST” as illustrated below:

START-UP TES T
ELECTRONICS PASS
TEMP SENSOR PASS
BAROMETRIC SENSOR PASS

19

Advanced Instruments, Inc.

77 F 100 KPa

77 F 100 KPa

After initial self diagnostics, the display shows the actual oxygen concentration and analysis range a long
with ambient temperature and pressure

3.30 %

Auto Range
0-10%

Menu Navigation

The four (4) pushbuttons located on the front of the transmitter operate the micro-processor:
Green ENTER (select)
Yellow UP ARROW
Yellow DOWN ARROW
Blue MENU (escape)

Main Menu
Access the MAIN MENU by pressing the MENU key:

MAIN MENU

AUTO SAMPLE
MANUAL SAMPLE
CALIBRATE

Range Selection

The GPR-2500A transmitter 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) mo de.

Procedure – Auto Sampling

• Access the MAIN MENU by pressing the MENU key.

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

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

• The display returns to the sampling mode:

20

Advanced Instruments, Inc.

77 F 100 KPa

77 F 100 KPa

77 F 100 KPa

77 F 100 KPa

3.30 %

Auto Range
0-10%

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 transmitter 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 0-10% range when the oxygen reading drops to 8.5%.

Procedure – Manual Sampling

Access the MAIN MENU by pressing the MENU key.
Advance the reverse shade cursor using the ARROW keys to highlight MANUAL SAMPLE.
Press the ENTER key to select the highlighted menu option.
The following displays appears:

MAIN MENU

AUTO SAMPLE
MANUAL SAMPLE
CALIBRATION
CONFIG ALARMS
BYPASS ALARMS

MANUAL RANGE
25%
10%
5%
1%

Advance the reverse shade cursor using the ARROW keys to highlight the desired RANGE.
Press the ENTER key to select the highlighted menu option.
The following display appears with the range selected and oxygen concentration of the sample gas:

3.30%

Manual Range
0-10%

21

Advanced Instruments, Inc.

77 F 100 KPa

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.

Once the OVER RANGE warning appears the user must advance the transmitter 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.

12.5%
OVER RANGE

Manual Range
0-10%

Start-Up is Complete…Proceed to Calibration
Zero Calibration

In theory, the oxygen sensor produces no signal output when exposed to an oxygen free sample gas.
However, the transmitter will 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
Tolerances of the electronic components

Recommendation

Zero calibration is recommended for measurements below 0.1% on the 0-1% range only. At ranges
above 0-1%, the overall zero offset is negligible and does not contribute any erro r in me asurements.

Procedure

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

• The overall zero offset from oxygen dissolved in the sensor electrolyte and or from the
electronics is typically less than 0.05% (on 0-1% range). This offset can be nulled by using the
zero calibration. Since the magnitude of zero of fset is low, it is not necessary to perform zero i f
the measurements are to be made on ranges above 0-1% range.

Caution: Prematurely zeroing the transmitter can cause a negative reading in both the
ZERO

• Access the MAIN MENU by pressing the MENU key.

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

• Press the ENTER key to select the highl ighted menu option.

22

Advanced Instruments, Inc.

77 F 100 KPa

77 F 100 KPa

0.005%

77 F 100 KPa

• Select ZERO CALIBRATE. The following display appears

MAIN MENU

AUTO SAMPLE
MANUAL SAMPLE
CALIBRATE

CALIBRATION

SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO

Allow the zero gas to flow through the transmitter until a stable oxygen reading is obtained. This may
take from several minutes to a few hours. It is highly recommended to monitor oxygen trend on a chart
recorder to ensure that the oxygen reading has stabilized; evidenced by a horizontal trend.

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

CALIBRTION IN PROCESS

ENTER TO CALIBRATE MENUE T O ABORT

ZERO

Pressing ENTER, the analyzer will complete ZERO calibration and return to Sample mode. If you press
ENTER when the oxygen reading is outside of the acceptable zero offset limit, the analyze r will fail ZERO
calibration and return to the Sample mode.

PASSED

CALIBRATION

FAILED

CALIBRATION

Note: The maximum zero calibration adjustment permitted is approximately 60% of the lowest full scale

range available. Thus the maximum zero calibration adjustment or zero offset for this analyzer is 0.6%
oxygen.

Factory Default Zero

The software will eliminate any previous zero calibra tion adjustment and display the actual signal output
of the sensor at a specified oxygen concentration. For example, assuming a zero gas is introduced, the
display will reflect an oxygen reading representing basically zero oxygen contents. However, a small
oxygen reading contributed by the sensor and electronics may be seen (typically less than 2% of the full
scale of the most sensitive range of the transmitter. This feature allows the user to test the integrity of
the sample system, sensor and electronics without removing the sensor from the sensor housing.

23

Advanced Instruments, Inc.

77 F 100 KPa

77 F 100 KPa

77 F 100 KPa

77 F 100 KPa

MAIN MENU

AUTO SAMPLE
MANUAL SAMPLE
CALIBRATE

CALIBRATION

SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO

Span Calibration

The transmitter is generally delivered calibrated and ready to use. However, in order to obtain reliabl e
data, the transmitter must be calibrated at the initial start-up and periodically thereafter. The maximum
calibration interval recommended is approximately 1-3 months, or as determined by the user’s
application.

Calibration involves adjusting t he transmitter electronics gain (sensitivity) to t he 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 range of analysis or one range above the intended measuring range is
recommended for optimum accuracy, see Calibration and Accuracy. Calibrat ion with ambient or
instrument air (20.9%) is recommended when installing a new sensor or when a certified gas is not
available.

Factory Default Span

The embedded software will remove previous span calibration data and reset the SPAN adjustment to the
factory default val ue based on the average oxygen sensor’s signal output. For example, after facto ry
default span, when a span gas is introduced, the micro-processor will display oxygen reading within

50% of the span gas value when the sensor signal output is within its specification. If the sensor’s

+
signal output is outside of its specification, the oxygen reading will be beyond +/-50% of the span gas
value. This feature allows t he user to test the sensor’s signal output without removing it from the sensor
housing.

Access the MAIN MENU by pressing the MENU key.
Advance the reverse shade cursor using the ARROW keys to highlight MANUAL SAMPLE.
Press the ENTER key to select the highlighted menu option. The following display appears:

MAIN MENU

AUTO SAMPLE
MANUAL SAMPLE
CALIBRATE

CALIBRATION

SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO

Manual Span

The user must ascertain that the oxyg en reading (actually the sensor’ s signal output) has reached a
stable value within the acceptable limits before completing the span adjustment. Fa ilure to do so will
result in an error.

24

Advanced Instruments, Inc.

77 F 100 KPa

77 F 100 KPa

77 F 100 KPa

Procedure

For calibration purposes, use of the AUTO SAMPLE mode is recommended. However, the user can select
the full scale MANUAL SAMPLE RANGE – for example, a span gas with an 8% oxygen concentration with
the balance nitrogen would dictate the use of the 0-10% full scale range for calibration.

Regulate the span gas pressure between 5-30 psig and set flow rate between 1-2 SCFH.
Allow the span gas to flow for 1-2 minutes to purge the air trapped in the span gas line.
Disconnect the sample gas line and connect the span gas line to the sample IN.
The transmitter will immediately respond to the spa n gas. Typically, within 5-10 minutes, oxygen reading

will stabilize. To perform span calibration
Access the MAIN MENU by pressing the MENU key.
Advance the reverse shade cursor using the ARROW keys to highlight AUTO SAMPLE.
Press the ENTER key to select the highlighted menu option.
Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATE and press ENTER.
The following displays appear:

MAIN MENU

AUTO SAMPLE
MANUAL SAMPLE
CALIBRATE

CALIBRATION
SPAN CALIBRATE

ZERO CALIBRATE
DEFAULT S PAN
DEFAULT ZERO

Press the ENTER key to select the SPAN CALIBRATE option. The following display will appear.

20.09%

GAS CONCENTRATION

Use the ARROW keys to enter the first digit of the span value.

Press the ENTER key to advance the underline cursor right or press the MENU key to adva nce the underline cursor left.

Repeat steps until the complete span value has been entered. After entering the span value, the following display appears

25

Advanced Instruments, Inc.

20.01%
SPAN

CALIBRATION IN PROGRESS

ENTER TO CALIBRATE

MENU TO ABORT

Allow approximately 5-1 0 min for oxygen to stabilize and the press ENTER to complete span gas
calibration

Both the Zero Calibrate and Span Cal ibrate functions result in the following displays sho wing either
'PASSED CALIBRATION" OR "FAILED CALIBRATION"

PASSED

CALIBRATION

FAILED

CALIBRATION

In either case, the transmitter returns to the SAMPLING mode and resume sampling.
Disconnect the span gas line and replace it with sample gas line.
Wait 10-15 minutes to ensure the reading is stable and then proceed to sampling.

26

Advanced Instruments, Inc.

100.0

4-20 mA Signal Output Adjustment

In rare instances the 4-20mA signal output ma y not agree to the reading displayed on the LCD. This
feature enables the user to adjust the 4mA signal output when the LCD displa ys 0 0.0 0. Note: Adjust the
20mA signal output with the OUTPUT SPAN option described below.

Access the MAIN MENU by pressing the MENU key.
Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.
Press the ENTER key to select the highlighted menu option and the following displays appear:

GAS MAIN MENU

AUTO SAMPLE
MANUAL SAMPLE
CALIBRATE
CONFIG ALARMS
BYPASS ALARMS

CALIBRATION

SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO
OUTPUT SPAN
OUTPUT ZERO

Advance the reverse shade cursor using the ARROW keys to highlight DEFAULT ZERO.
Press the ENTER key to select the highlighted menu option and the following display appears:

OUTPUT ZERO OFFSET

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

The default setting of 100 illustrates no adjustment t o the analog output signal. 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 value to above 100 to increase the analog signal value or
decrease it below 100 to decrease the analog signal.

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.

Press the ARROW keys to enter the OUTPUT ZERO OFFSET value.
Repeat the OUTPUT ZERO OFFSET routine until the output is 4 mA .
Save the adjustment value by pressing the ENTER key or abort by pressing the MENU key. After

adjustment, the system returns to the SAMPLING mode.
Repeat the above procedure for 20 mA signal adjustment by selecting OUTPUT SPAN adjustment instead

of OUTPUT ZERO adjustment.

27

Advanced Instruments, Inc.

Sampling

GPR-2500A Oxygen Transmitter requires positive pressure to flow the samp le through the sensor housing
to measure the oxygen concentration in a sample gas.

Procedure

Following calibration, the transmitter returns automatically to the SAMPLE mode.
Select the desired sampling mode - Auto or if Manual, the range that provides maximum resolution – as

described above.
Use metal tubing to transport the sample gas to the transmitter.
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 securely
connected

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 betw een 1-5 SCFH, a flow rate of 1-2 SCHF is
recommended.

For sample gases under atmospheric or slightly negative pressure an optional sampling pump is
recommended to push the sample through the transmitter. Ensure that sample flow is within the
recommended range; if necessary, use a flow control valve to set the sample flow.

Assure the sample is adequately vented for optimum response and re c overy – and safety.
Allow the oxygen reading to stabilize for approximately 10 minutes at each sample point.
Avoid drawing a vacuum on the sensor that exceeds 14” of water column pressure.
Avoid excessive flow rates above 5 SCFH which generate backpressure on the sensor.
Avoid the collection of particulates, liquids or condensation collect on the sensor that could block the

diffusion of oxygen into the sensor.

Standby

The transmitter has no special storage requirements.
The sensor should remain connected during storage periods.
Store the transmitter with the power OFF.
If storing for an extended period of time, store at temperature below 45 degree C and away from direct

heat.

28

Advanced Instruments, Inc.

6. Maintenance

Generally, cleaning the electrical contacts or replacing filter elements is the extent of the maintenance
requirements of this transmitter.

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 Features & Specifications
define the normal operating conditions and expected life of the standard sen sor utilized by the GPR­2500A transmitter. Expected sensor life is inversely proportional to changes in oxygen concentration,
pressure and temperature. To replace sensor, follow the procedure outlined in the section “Operation”

Serviceability: Except for replacing the oxygen sensor, there are no parts inside the transmitter for the
operator to service. Only trained personnel wi th the authorizati on of their supervisor should conduct
maintenance.

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. Avoid contact with any liquid o r crystal type po wder in or around the s ensor or sensor housing,
as either could be a form of electrolyte. Leaking sensors should be disposed of in accordance with local
regulations.

29

7. Spare Parts

Item No.

Description

GPR-11-32-4

Oxygen Sensor (GPR-2500A)

XLT-11-24-4

Oxygen Sensor (GPR-2500A)

Item No.

Description

A-2079

Bracket Sensor Mounting

CONN-1014

Cable Sensor with Female Socket

FITN-1018

Connector SS 1/8” MNPT to 1/ 8” Tube

FITN-1039

Elbow SS 1/8”

A-3051

Housing Flow Adaptor

MTR-1010

Meter Digital Panel LCD Backlight

A-2781

Nut Sensor Retaining

Rev C4

Recommended spare parts for the GPR-2500A Oxygen Transmitter:

Other spare parts:

Advanced Instruments, Inc.

A-1161-AIS-2-

A-1166-AIS-2 Rev H PCB Assembly Power Supply / Interconnections

PCB Assembly Main / Display

30

8. Trouble Shooting

Symptom

Possible Cause

Recommended Action

Advanced Instruments, Inc.

No Display

Reading does not reflect
expected values

Unable to span calibrate the
sensor with ambient air or
with a certified span gas

Slow response time

Inadequate power supply
Incorrect polarity of power input

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

Indication sensor signal output is
outside the acceptable limit

Longer sample line
Low sample flow
Liquid covering sensing membrane

Ensure that power to the transmitter is
within the recommended range

Ensure that the polarity of the input
power matches with the designation on
the power input terminal

Recalibrate the analyzer at ambient
conditions that resemble with sampling
conditions.

Replace sensor, see Section 6 ­Maintenance.

Reduce the sample tubing to a
minimum, set sample flow between 1-2
SCFH, gently remove any liquid that
might have accumulated on the
sensor’s sensing side. If condensable
components are present, use a
coalescing filter upstream of sensor

Erratic oxygen reading

No oxygen reading

High oxygen reading

Presence of interference gases.
Damaged sensor cable and or sensor

housing bring sig nal to the PCB

No signal from sensor possibly due to
defective/used up sensor or broken
wire connections from sensor cable or
sensor housing to PCB

Inadequate contr ol of pressure and
sample flow rate

Consult factory, interfering gas such as
H2S might need to removed from the
sample gas, replace sensor.

Replace sensor cable
Replace upper section of sensor

housing

Check for any physical damag e to
sensor cable and or sensor housing.
Use a voltmeter and check continuity
from sensor housing to the Molex
connector (the connector from sensor
housing to the PCB)

Check sensor signal output in air (by
using a voltmeter (set to measure
micro-amp current). Sensor signal in
air must be within 40-60 uA (%
sensor) or 450-900 uA (PPM sensor).

Set sample gas pressure within
recommended range of 5-30 PSIG

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Advanced Instruments, Inc.

Zero calibration.

Cannot perform Zero
calibration

Excessive back pressure on sensor
caused by high sample flow

Obstruction on sample vent line

Abnormality in span gas

Leak in sample/zero gas line
Inadequate zero gas flow
Contaminated zero gas
Attempting to Zero calibrate

prematurely

Set sample flow between 1-2 SCFH
Vent sample to atmosphere
If venting sample to a vent pipe with

pressure above atmosphere, consult
factory for rec ommendations.

Qualify span gas with a secondary
analyzer

Check for any leakage in sample/zero
gas line

Check the integrity of zero gas
Set the gas flow rate between 1-2

SCFH
Allow sufficient time for the oxygen

reading to stabilize before attempting

32

Advanced Instruments, Inc.

What is covered:

transmitter.

For how long:

One year from shipment by manufacturer or purchase from a distributor with proof of purchase.

Who is warranted:

warranty extend to more than one customer.

What we will do:

reconditioned one of the same or upgraded design.

Limitations:

to province.

What is not covered:

transmitter; fire, flood, or acts of God; or other failure to follow the O wner’s Manual.

9. Warrant Policy

Any defect in mater ial and workmanship from normal use in accordance w ith the Owner’s Manual.
This warranty applies to all transmitter purchased worldwide. Advanced Instruments Inc. reserves the

right in its sole discretion to invalidate this warranty if the serial number does not appear on the

This warranty is limited to the first customer who submits a claim. Under no circumstances will the

If your Advanced Instruments Inc. transmitter is defective with respect to material and workmanship, we
will repair it or, at our option, replace it at no charge to you.

If we choose to replace your Advanced Instruments Inc. transmitter, we may use new or reconditioned
replacement parts.

If we choose to replace your Advanced Instruments Inc. transmitter, we may replace it with a new or

Implied warranties, including those of fitness for a par ticular purpose and merchantability (an unwritten
warranty that the product is fit for ordinary use), are limited to one year from the date of shipment by
manufacturer or purchase from a di stributor with proof of purchase.

Advanced Instruments Inc. will not pay for: loss of time; inconvenience; loss of use of your Advanced
Instruments Inc. transmitter or property damage caused by your Advanced Instru ments Inc. transmitter
or its failure to work; any special, incidental or consequential damages; or any damage re sulting from
alterations, misuse or abuse; lack of proper maintenance; unauthorized repair or modification of the
transmitter; affixing of any attachment not provi ded with the transmitter 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, so the above exclusions may not apply to you. This warranty gives
you specific legal rights, and you may also have other rights which vary from state to state and province

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 transmitter; affixing of any attachment not provided with the

33

Advanced Instruments, Inc.

Sole Warranty

There are no other express warranties.

How to obtain warranty service:

warranty.

This warranty is the only one we will give on your Advanced Instruments Inc. transmitter, and it sets
forth all our responsibilities regarding your Advanced Instruments Inc. transmitter.

Do-It-Yourself-Service:
Call Advanced Instruments Inc. at 909-392-6900 between 8:00am and 5:00pm Pacific Time weekdays.

Trained technicians will assist you in diagnosing the problem and arrang e to supply you with the required
parts.

Service from Distributors:
If warranty service is provided by a distributor, Advanced Instruments Inc. will provide all required parts

under warranty at no charge to you, but the distributor is an independent business and may render a
service charge for their services. Advanced Instruments Inc. will not reimburse you or otherwise be
responsible for those charges.

Return to Advanced Instruments Inc.:
You may obtain warranty service by returning you transmitter, postage prepaid to:

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

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

Your choice of any one of the service options described above is your exclusive remedy under this

34

Advanced Instruments, Inc.

Product Name

Oxygen Sensor Models CAD, GPR, PSR, SAF, 67013

Synonyms

Galvanic Fuel Cell, Electrochemical Transdu ce r

Manufacturer

Analytical Industries Inc.

2855 Metropolitan Place, Pomona, CA 91767 USA

Emergency Phone Number

909-392-6900

Preparation / Revision Date

January 1, 1995

electrolyte unless otherwise noted.

Carcinogens at levels > 0.1%

None

Others at levels > 1.0%

Potassium Hydroxide, Lead

CAS Number

Potassium Hydroxide = KOH 1310-58-3, Lead = Pb 7439-92-1

Family

Boiling Point Range

100 to 115° C

Melting Point Range

KOH -10 to 0° C, Lead 327° C

Freezing Point

-40 to 0° C

Molecular Weight

KOH = 56, Lead = 207

Specific Gravity

1.09 @ 20° C

Vapor Pressure

Not applicable

Vapor Density

Not applicable

pH

> 14

Solubility in H2O

Complete

% Volatiles by Volume

None

Evaporation Rate

Similar to water

Appearance and Odor

Colorless, odorless aqueous solution

Use

Potassium Hydroxide - electrolyte, Lead - anode

Handling

Rubber or latex gloves and safety glasses

Storage

Indefinitely

10. Material Safety Data Sheet [MSDS]

Product Identification

Notes Oxygen sensors are sealed, contain protective coverings and in normal

conditions do not present a health haz ard. Information applies to

Specific Generic Ingredients

Chemical (Synonym) and

Physical Properties

Potassium Hydroxide (KOH) - Base, Lead (Pb) - Metal

General Requirem en ts

35

Fire and Explosion Data

Flash and Fire Points

Not applicable

Flammable Limits

Not flammable

Extinguishing Method

Not applicable

Special Fire Fighting Procedures

Not applicable

Hazards

Stability

Stable

Instability

Incompatibility

Avoid contact with strong acids

Products

Conditions to Avoid

None

Use a fresh towel each time.

disposal

Primary Route(s) of Entry

Ingestion, eye and skin contact

.05 mg/cubic meter

Effects of Exposure -

2433 mg/kg

of vision.

burn.

Inhalation

Liquid inhalation is unlikely.

Symptoms

Eye contact - bur ning sens a ti on; Skin co nt act - soapy slick feeling.

Medical Conditions Aggravated

None

not listed; OSHA - not listed

Other

Lead is listed as a chemical known to the State of Calif ornia to cause

Advanced Instruments, Inc.

Unusual Fire and Explosion

Reactivity Data

Conditions Contributing to

Hazardous Decomposition

Spill or Leak

Steps if material is released Sensor is packaged in a sealed protective plastic bag, check the se nsor

Waste Disposal Method In accordance with federal, state and local regulations for battery

Not applicable

None

None

inside for electrolyte leakage.
If the sensor leaks inside the protective plastic bag or inside a

transmitter 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.

Health Hazard Information

Exposure Limits Potassium Hydroxide - ACGIH TLV 2 mg/cubic meter; Lead - OSHA PEL

Ingestion Electrolyte could be harmful or fatal if swallowed. Oral LD50 (RAT) =

Eye Electrolyte is corrosive and eye contact could result in permanent loss

Skin Electrolyte is corrosive and skin contact could result in a chemica l

Carcinogenic Reference Data NTP Annual Report on Carcinogens - not listed; LARC Monogra p hs -

36

birth defects or other reproductive harm.

Emergency First Aid

attention immediately.

contaminated clothing; If burning persists, seek me d ical attention.

medical attention immediately.

Inhalation

Liquid inhalation is unlikely.

Ventilation Requirements

None

Eye

Safety glasses

Hand

Rubber or latex gloves

Respirator Type

Not applicable

Other Protective Equipment

None

body may contain hazardous residue.

Transportation

Not applicable

Product Name

Oxygen Sensor Models XLT

Synonyms

Galvanic Fuel Cell, Electrochemical Transdu ce r

Manufacturer

Analytical Industries Inc.

2855 Metropolitan Place, Pomona, CA 91767 USA

Emergency Phone Number

909-392-6900

Preparation / Revision Date

January 1, 1995

Information applies to electrolyte unless otherwise noted.

Carcinogens at levels > 0.1%

None

Others at levels > 1.0%

Acetic Acid, Lead

CAS Number

Acetic Acid = 64-19-7, Lead = Pb 7439-92-1

Family

Boiling Point Range

100 to 117° C

Advanced Instruments, Inc.

Ingestion

Skin Contact Wash affected area repeatedly with plenty of water; Remove

Eye Contact Flush repeatedly with plenty of water for at least 15 minutes; Seek

Special Protection Information

Special Precautions

Precautions

Do not induce vomiting; Give plenty of cold water; Seek medical

Do not remove the sensor’s pr otective Teflon and PCB coverings; Do
not probe the sensor with sharp objects; Wash hands thoroughly after
handling; Avoid contact with eyes, skin and clothing; Empty sensor

Product Identification

Notes Oxygen sensors are sealed, contain protective coverings and in normal

conditions do not present a health haz ard.

Specific Generic Ingredients

Chemical (Synonym) and

Acetic Acid (CH3CO2H) - Acid, Lead (Pb) - Metal

Physical Properties

37

Melting Point Range

Acetic Acid = not applicable, Lead 327° C

Freezing Point

-40 to -10° C

Molecular Weight

Acetic Acid = not applicable, Lead = 207

Specific Gravity

1.05 @ 20° C

Vapor Pressure

11.4 @ 20° C

Vapor Density (air = 1)

2.07

pH

2-3

Solubility in H2O

Complete

% Volatiles by Volume

None

Evaporation Rate

Similar to water

Appearance and Odor

Colorless, vinegar-like odor aqueous solution

General Requirem en ts

Use

Acetic Acid - electrolyte, Lead - anode

Handling

Rubber or latex gloves; Safety glasses

Storage

Indefinitely

Flash and Fire Points

Not applicable

Flammable Limits

Not flammable

Extinguishing Method

Not applicable

Special Fire Fighting Procedures

Not applicable

Hazards

Stability

Stable

Instability

Incompatibility

Avoid contact with strong bases

Products

Conditions to Avoid

Heat

Use a fresh towel each time.

disposal.

Advanced Instruments, Inc.

Fire and Explosion Data

Unusual Fire and Explosion

Reactivity Data

Conditions Contributing to

Hazardous Decomposition

Spill or Leak

Steps if material is released

Not applicable

None

Emits toxic fumes when heated

Sensor is packaged in a sealed protective plastic bag, check the sensor
inside for electrolyte leakage. If the sensor leaks inside the protective
plastic bag or inside an transmitter sensor housing do not remove it
without rubber or latex gloves, safety glasses and a source of water.
Flush or wipe all surfaces repeatedly with water or wet paper towel.

Waste Disposal Method In accordance with federal, state and local regulations for battery

38

Advanced Instruments, Inc.

Primary Route(s) of Entry

Ingestion, eye and skin contact

mg/cubic meter

Effects of Exposure -

6620 mg/kg

of vision.

burn.

Inhalation

Liquid inhalation is unlikely.

Symptoms

Eye contact - bur ning sens a ti on; Skin co nt act - burning sensation.

Medical Conditions Aggravated

None

not listed; OSHA - not listed

to cause cancer.

Seek medical attention immediately.

contaminated clothing; If burning persists, seek m edical attention.

medical attention immediately.

Inhalation

Liquid inhalation is unlikely.

Ventilation Requirements

None

Eye

Safety glasses

Hand

Rubber or latex gloves

Respirator Type

Not applicable

Other Protective Equipment

None

body may contain ha zardous residue.

Transportation

Not applicable

Health Hazard Information

Exposure Limits Acetic Acid - ACGIH TLV / OSHA PEL 10 (TWA); Lead - OSHA PEL .05

Ingestion Electrolyte could be harmful or fatal if swallowed; Oral LD50 (RAT) =

Eye Electrolyte is corrosive and eye contact could result in permanent loss

Skin Electrolyte is corrosive and skin contact could result in a chemical

Carcinogenic Reference Data NTP Annual Report on Carcinogens - not listed; LARC Monogr ap hs -

Other Lead is listed as a chemical known to the State of California to cause

birth defects or other reproductive harm. Lead acetate formed as the
sensor is used is listed as a chemical known to the State of California

Emergency First Aid

Ingestion

Skin Contact Wash affected area repeatedly with plenty of water; Remove

Eye Contact Flush repeatedly with plenty of water for at least 15 minutes; Seek

Special Protection Information

Special Precautions

Precautions

Do not induce vomiting; Give ple n ty of cold water or if available milk;

Do not remove the sensor’s pr otective Teflon and PCB coverings; Do
not probe the sensor with sharp objects; Wash hands thoroughly after
handling; Avoid contact with eyes, skin and clothing; Empty sensor

39