Analytical Industries Inc (AII) GPR-1200 MS Operating Manual

Technical Specifications *

Accuracy: < 2% of FS range under constant conditions
Analysis Ranges: 0-1, 0-10, 0-100, 0-1000 PPM FS ranges;

Auto-ranging or manual lock on a single range

Application: Oxygen analysis in inert, helium, hydrogen and mixed

gas streams
Area Classification: General purpose
Calibration: Max interval—3 months. Use certified span gas with O2

content (balance N2) approximating 80% of full scale.

For optimum accuracy, calibrate one range higher than

the range of interest.
Compensation: Temperature

Connections: 1/8" compression tube fittings
Controls: Water resistant keypad; menu driven range selection,

calibration and system functions
Display: Graphical LCD 2.75 x 1.375”; resolution .001 PPM
Enclosure: Painted aluminum NEMA 4X, 8.6 x 9 x 3", 12 lbs.

Flow: Sensitive; recommended flow rate 2 SCFH

LED Indicators: LOW BATT (72 hr. warning); CHARGE mode

GPR-1200 MS

Portable PPB O2 Analyzer

Rechargeable Battery Powered

Linearity: > .995 over all ranges
Pressure: Inlet - regulate to 5-30 psig to deliver 2 SCFH flow;

vent - atmospheric
Power: Rechargeable battery, 60 day cycle, 8 hrs with pump
Recovery Time: 2 minutes at 9 PPM to 10 PPB in < 10 min on N2 purge

30 seconds in air to < 1 PPM in < 45 min on N2 purge

Response Time: 90% of final FS reading in 10 seconds
Sample System: Flow control and sample/bypass valves; flow indicator
Sensitivity: < 0.5% of FS range

Sensor Model: GPR-12-2000MS
Sensor Life: 24 months in < 100 PPM O2 at 25ºC and 1 atm
Signal Output: 0-1V FS

Temp. Range: 5ºC to 45ºC
Warranty: 12 months analyzer; 12 months sensor

Wetted Parts: Stainless steel

Optional Equipment

Integral stainless steel bypass
sample system significantly in-

Innovative Sensor Technology

 Fast Recovery to < 1 PPM from Exposure to Air
 Unmatched Performance
 Unmatched Sensor Life and Warranty
 Excellent Stability

Sensitivity 0.5% Full Scale
Auto Ranging or Fixed Single
0-1 V Signal Output
Operates in Charging Mode
Low Battery Warning LED
Stainless Steel Wetted Parts

Carrying case with custom foam insert
Sample conditioning - pump, filter, scrubbers - contact factory

ISO 9001:2008 Certified

INTERTEK Certificate No. 485

* Subject to change without notice.

2855 Metropolitan Place, Pomona, CA 91767 USA ♦ Tel: [phone], Fax: [phone], www.aii1.com, e-mail: [e-mail] Rev 6/15

Portable ppm Oxygen Analyzer

GPR-1200 MS

Owner’s Manual

2855 Metropolitan Place, Pomona, CA 91767 USA ♦ Tel: [phone], Fax: [phone], e-mail: [e-mail], www.aii1.com

10/09

Table of Contents

Introduction
Quality Control Certification
Safety
Specifications
Operation
Maintenance
Spare Parts
Troubleshooting
Warranty
Material Safety Data Sheets
Appendix C – Pump Options

1
2
3
4
5
6
7
8
9
10

1 Introduction

Your new portable oxygen analyzer incorporates an advanced electrochemical sensor specific to oxygen along with
state-of-the-art digital electronics designed to give you years of reliable precise oxygen measurements in variety of
industrial oxygen applications. To obtain maximum performance from your new oxygen analyzer, 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; and, to design
the analyzer for superior performance and minimal cost of ownership. This analyzer was tested thoroughly by the
manufacturer prior to shipment 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.

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: _______________________
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.

2

2 Quality Control Certification

Date: Customer:

Order No.:

Model GPR-1200 MSMS Portable ppm Oxygen Analyzer
Sensor ( ) GPR-12-2000MS ppm Oxygen Sensor

Serial Nos.

Accessories Owner’s Manual
( ) PWRS-1002 9VDC Battery Charger/Adapter 110VAC

CONN-1034 Plug Mini Phone .141 dia. Black Handle
TOOL-1001 5/16 Combination Wrench

Configuration A-1151-E-B6-NB PCB Assembly Main/Display
Range: 0-1 ppm, 0-1 ppm, 0-100 ppm, 0-1000 ppm
Wetted parts: Stainless steel
Crossover bypass/shut off valve

Electronics Test LED indicators: Low battery, charge
Electronic offset
Analog signal output 0-1V
Gas Phase Test

Span adjustment within 10-50% FS
Final Overall inspection for physical defects

Options NA
Notes 1 of 1 analyzers due ASAP

Analyzer_________________________ Sensor _____________________________

( ) PWRS-1003 9VDC Battery Charger/Adapter 220VAC
( ) PWRS-1008 9VDC Battery Charger/Adapter 12VDC Auto Cigarette Lighter

Baseline drift on zero gas < ± 2% FS over 24 hour period on 0-1% range
Noise level < ± 0.5% FS

Pass

3

3 Safety

General

This section summarizes the essential precautions applicable to the GPR-1200 MS Series Portable ppm 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.

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 l ocal regulations.

Exposure to air: Minimize the time the sensor is exposed to air during installation.
Inlet Pressure: The analyzer is designed for flowing samples are intended to operate at positive pressure

regulated to between 5-30 psig.

Outlet Pressure: The sample gas vent pressure should be atmospheric.
Flow Rate: Recommended – 1 SCFH
Mounting: Mount as recommended by the manufacturer. The analyzer is approved for indoor or outdoor use.
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.

4

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.
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 l ocal regulations.

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.

5

A

g

4 Specifications *

Accuracy: < 1% of FS range under constant conditions
Analysis: 0-1 ppm, 0-10, 0-100, 0-1000 ppm FS ranges;

Application:

Approvals: CE, Intrinsic Safety (pending)
Area Classification: Meets recognized intrinsic safe ty standard s for us e in Class

Calibration: Certified gas of O

Compensation: Temperature and barometric pressure
Connections: 1/8" compression tube fittings
Controls: Water resistant keypad; menu driven ran

Display: Graphical LCD 2.75 x 1.375; resolution .001 ppb; displays

Enclosure: Painted aluminum NEMA 4X, 8.6x9x3", 12 lbs.
Flow Sensitivity: None between 1-3 SCFH, 1 SCFH recommended
LED Indicators: LOW BATT (72 hr. warning); CHARGE mode
Linearity: > .995 over all ranges
Pressure: Inlet - regulate to 5-30 psig; vent - atmospheric
Power: Rechargeable battery, 60 day duty cycle (pump 1 day)
Recovery Time: 60 seconds in air to < 1 ppm in < 20 minutes on N
Response Time: 90% of final FS reading in 10 sec onds
Sample System: Flow control, bypass and isolation valves; flow indicator
Sensitivity: < 0.5% of FS range
Sensor Model: GPR-12-2000MS
Sensor Life: 24 months at 25ºC and 1 atm; average O
Signal Output: 0-1V
Temp. Range: 5º to 45ºC
Warranty: 12 months analyzer; 12 months sensor
Wetted Parts: Stainless steel

Optional Equipment

auto-ranging or manually lock on single range

nalyze oxygen concentrations from 10 ppb to 1000 ppm

in inert, hydrocarbon, helium, hydrogen and gas streams

1, Division 1, Group C, D hazardous areas (see Options)

balance N2 approximating 80% of

analysis range or one range above analysis range

calibration and system functions

real time ambient temperature and pressure

2

e selection,

purge

2

< 100 ppm

2

GPR-1200 MS

Portable ppm O2 Analyzer

Advanced Sensor Technology
Accuracy < 1% FS Range
Sensitivity < 0.5% FS Range
Fast Recovery to < 1 ppm
24 Month Expected Life
No Maintenance
Intrinsically Safe Design
4 Standard Analysis Ranges
Auto or Manual Ranging
SS Bypass Sample System
Water Resistant Enclosure
ISO 9001:2008 Approved QA System

Integral sampling pump - general purpose or intrinsically safe designs
Carrying case with custom foam insert
Sample conditioning accessories - contac t factory

* Specifications subject to change without notice

6

Integral bypass sample system increases productivity.

5 Operation

Principle of Operation

The GPR-1200 MS portable oxygen analyzer incorporates a proprietary Pico-Ion oxygen sensor. The analyzer is
configured in a general purpose NEMA 4 rated enclosure and meets the intrinsic safety standards required for use
in Class 1, Division 1, Groups A, B, C, D hazardous areas. Two integral sampling pump options are available – one
that meets the intrinsic safety standards and a less expensive option for general purpose service.

Breakthrough Sensor Technology:

A breakthrough sensor technology measures the partial pressure of oxygen from less than 10 ppb to 1000 ppm
level in inert gases, gaseous hydrocarbons, helium, hydrogen and mixed gas streams. The “Pico-Ion” sensor design
and chemistry have been combined to produce a significant advancement in oxygen sensor technology.

7

Oxygen, the fuel for this electrochemical transducer, 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 four ranges and remains virtually constant over its useful life. The sensor requires no maintenance or
electrolyte addition and is easily and safely replaced at the end of its useful life.

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. Several selectable averaging modes are available to enhance the
stability of the analyzer and eliminate anomalies if desired. Sample oxygen is analyzed very accurately. Response
time of 90% of full scale is less than 10 seconds on the 0-1 ppm range (actual experience may vary due to the
integrity of sample line connections, dead volume and flow rate selected).

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.

Power is supplied by an integral rechargeable lead acid battery which provides enough power to operate the
analyzer continuously for approximately 60 days. An LED located on the front panel provides a blinking 72 hour
warning to recharge the battery. A 9VAC adapter (positive pole located on the inside of the female connector) can
be used to recharge the battery from a convenience outlet. The analyzer is designed to be fully operational during
the 8-10 hour charging cycle which is indicated by a second continuously lit LED.

Sample System:

The GPR-1200 MS is supplied with a bypass sample system which enables the user to isolate the sensor from
exposure to high oxygen concentration which results is a substantial increase is user productivity. The bypass
feature has two important features: One, the sensor can be isolated from exposure to high oxygen levels when
changing sample lines, during transport and during standby intervals making it ideal for mobile cart applications.
Two, it enables the user to purge newly connected gas lines of the oxygen trapped inside. The result is an analyzer
that comes on-line at ppb levels in a matter of minutes and provides users with a significant increase in
productivity.

However the sample must be properly presented to the sensor to ensure an accurate measurement. Users
interested in adding their own sample conditioning system should consult the factory. Advanced Instruments Inc.
offers a full line of sample handling, conditioning and expertise to meet your appl ication requirements. Contact us
at 909-392-6900 or e-mail us at [e-mail]

8

Pressure & Flow

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.

The sensor is exposed to sample gas that must flow or be drawn through the analyzer’s internal sample system.
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 control valve upstream of the sensor controls the flow rate of the sample gas which is displayed by the flow
indicator downstream of the sensor. 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).

Positive Pressure Applications:

If the sample pressure is greater than 30 psig an external pressure regulator (optional) is required upstream of the
analyzer to control of sample flow. A pressure regulator with a metallic diaphragm is recommended to prevent high
oxygen readings that could result from the use of diaphragms constructed of more gas permeable materials.

If other optional sample system components such as coiled metal tubing (samples must be cooled to at least 35­40º C for continuous use), coalescing filters, scrubbers, etc. are required install the pressure regulator after the
coiled tubing and before the other components and the analyzer. Note: A scrubber requires a flow valve upstream
for optimum efficiency and response time and that the analyzer flow valve is opened completely.

Atmospheric or Slightly Negative Pressure Applications:

For accurate high ppb and/or low ppm range measurements, an optional sample pump is required downstream of
the analyzer to draw the sample through the analyzer. The vacuum drawn on the analyzer and sensor should not
exceed 4” of water.

Caution: Use of pump downstream of the sensor requires the flow control valve upstream of the sensor be
completely opened to avoid drawing excessive vacuum on the sensor, which can damage the sensor.

If pump over-loading (due to the limitation of low flow rate of the sample gas) is a consideration, a second throttle
valve on the pump’s inlet side may be necessary to provide a bypass path, as illustrated below, to prevent the
pump from over-loading and over-heating while maintaining the required sample flow rate within the above­mentioned parameters.

Standard Bypass Sample System

The GPR-1200MS Portable 0-1 ppm Oxygen Analyzer is equipped with a bypass sample system featured below:

1. Manufacturer supplies the analyzer with the sensor it was qualified with.

2. Isolate the sensor during transport and maintenance intervals and extend sensor life.

3. Isolate the sensor from exposure to high oxygen levels during upset conditions and extend sensor life.

4. Purge the high oxygen levels or air trapped in the sample system following a process upset, changing sample
gas lines or connecting span gas lines.

5. Increase productivity by complimenting the recovery capability of the sensor to reduce downtime.

9