Galvanic Applied Sciences ProTech903 User manual

ProTech903TM
H2S and Total Sulfur Lead Acetate Tape Analyzer
OPERATION MANUAL
P/N: MA2554
Revision 14 - August 2019
Galvanic Applied Sciences, Inc.
7000 Fisher Road S.E.
Calgary, Alberta, T2H 0W3
Canada
Phone: [phone]
Toll Free: 1-866-252-8470
E-mail: [e-mail]
World Wide Web: http://www.galvanic.com

NOTICES
This system is covered by a limited warranty. A copy of the warranty is included with this manual.
The operator is required to perform routine maintenance as described herein on a periodic basis
to keep the warranty in effect. For routine maintenance procedures, refer to Maintenance
All information in this manual is subject to change without notice and does not represent a
commitment on the part of Galvanic Applied Sciences, Inc.
No part of this manual may be reproduced or transmitted in any form or by any means without the
written permission of Galvanic Applied Sciences, Inc.
Note: Changes or modifications not expressly approved by Galvanic Applied Sciences, Inc.
could void the user's authority to operate the equipment.
© Copyright 2019, Galvanic Applied Sciences, Inc. All rights reserved.
Printed in Canada

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Table of Contents
SECTION 1PROTECH903 H2SAND TOTAL SULFUR ANALYZER .........................................................13
1.1 OVERVIEW...........................................................................................................................13
1.2 PRINCIPLE OF OPERATION....................................................................................................13
1.3 ANALYZER CONFIGURATIONS................................................................................................13
1.3.1 Hydrogen Sulfide Only..........................................................................................13
1.3.2 Hydrogen Sulfide and Total Sulfur .......................................................................13
1.3.3 Total Sulfur Only ...................................................................................................14
1.4 FEATURES OF THE ANALYZER ...............................................................................................14
1.5 SYSTEM OPERATING CONTROL.............................................................................................14
1.6 CONTENTS OF THIS MANUAL.................................................................................................15
SECTION 2ANALYZER COMPONENTS ..............................................................................................16
2.1 OVERVIEW...........................................................................................................................16
2.2 MOTHERBOARD ...................................................................................................................18
2.2.1 Description of the Motherboard ............................................................................18
2.2.2 Boards Associated with the Motherboard.............................................................18
2.2.3 AC and DC Power Supply ....................................................................................18
2.3 INTRINSICALLY SAFE BARRIER BOARD (PERIPHERAL INTERFACE)...........................................19
2.4 LCD DISPLAY BOARD,KEYPAD AND LED’S...........................................................................19
2.4.1 User Interaction Features .....................................................................................19
2.4.2 Display Board Communication Ports....................................................................20
2.5 CHASSIS..............................................................................................................................20
2.6 TAPE TRANSPORT SYSTEM...................................................................................................21
2.6.1 Supply and Take-up Reels ...................................................................................21
2.6.2 Optical Encoder ....................................................................................................22
2.7 SAMPLE CHAMBER ASSEMBLY..............................................................................................23
2.7.1 Rate/Read Aperture Strip and the Rear Window Assembly.................................23
2.7.2 Read/Rate Aperture Strip .....................................................................................24
2.7.3 Sensor Block ........................................................................................................25
2.7.4 Compression Head ...............................................................................................26
2.8 SAMPLE FLOW RELATED COMPONENTS ................................................................................27
2.8.1 Sample Humidifier ................................................................................................27
2.8.3 Rotameter .............................................................................................................28
2.8.4 Eductor .................................................................................................................29
2.9 TOTAL SULFUR OPTION........................................................................................................30
2.10 SAMPLE CONDITIONING SYSTEM...........................................................................................32
SECTION 3INSTALLATION................................................................................................................33
3.1 RECEIVING THE SYSTEM.......................................................................................................33
3.2 INSTALLATION REQUIREMENTS .............................................................................................33
3.2.1 Electrical Requirements........................................................................................33
3.2.2 Location of the System .........................................................................................33
3.2.3 Space Requirements ............................................................................................33
3.2.4 Area Classification Information.............................................................................36
3.2.5 Gas Requirements................................................................................................36
3.3 UNPACKING .........................................................................................................................36
3.4 INSTALLATION OF THE SOFTWARE .........................................................................................37
3.4.1 Computer Requirements ......................................................................................37
3.4.2 Install the Application Software ............................................................................37

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3.4.3 Power up the Analyzer .........................................................................................38
3.4.4 Connect the PC to the analyzer via RS-232.........................................................40
3.4.5 Open the Application Program and Set Communication Parameters ..................41
3.4.5.1 Com Port Direct Option .............................................................................42
3.4.5.2 Modem Option...........................................................................................42
3.4.5.3 Ethernet Option .........................................................................................43
3.4.5.4 Connect the Computer and the Analyzer..................................................44
3.5 INSTALLING THE KEYPAD,SENSING TAPE AND HUMIDIFIER.....................................................45
3.5.1 Installing the Keypad ............................................................................................45
3.5.2 Installing the Sensing Tape ..................................................................................45
3.5.3 Installing the Humidifier ........................................................................................47
3.6 TOTAL SULFUR FURNACE ASSEMBLY AND INSTALLATION OF THE QUARTZ REACTION TUBE. ....48
3.7 CONNECTING GAS TO ANALYZER ..........................................................................................50
3.7.1 Connecting Gas to the Analyzer...........................................................................50
3.7.2 Leak Testing of the Compression Head ...............................................................50
3.7.3 Leak Testing the Total Sulfur Accessory..............................................................51
3.7.4 Connecting the Eductor ........................................................................................52
3.8 TESTING THE ANALYZER.......................................................................................................53
SECTION 4OPERATING THE PROTECH903 ANALYZER VIA THE HANDHELD KEYPAD ...........................54
4.1 INTRODUCTION ....................................................................................................................54
4.2 THE FRONT PANEL LEDS.....................................................................................................54
4.3 THE MAIN PAGE OF THE LCD DISPLAY..................................................................................56
4.3.1 Status Indicator Lines ...........................................................................................57
4.3.2 Central Region......................................................................................................58
4.3.3 Display Menus and Sub-menus Descriptions.......................................................58
4.4 USING THE HANDHELD KEYPAD ............................................................................................59
4.5 THE STREAMS MENU ...........................................................................................................61
4.6 THE ALARMS LIST ................................................................................................................63
4.7 THE DISPLAY MENU .............................................................................................................64
4.7.1 The SQNC Menu ..................................................................................................64
4.7.2 I/O Menu ...............................................................................................................65
4.7.3 Analyzer Reading Menu .......................................................................................65
4.7.4 Analyzer Schedule Menu......................................................................................65
4.8 THE CONFIGURATION MENU .................................................................................................66
4.8.1 The Gen Menu......................................................................................................66
4.8.2 The DIO Menu (Digital Inputs/Outputs) ................................................................67
4.8.3 The AIO Menu (Analog Inputs/Outputs) ...............................................................68
4.8.4 The MSEQ Menu (Manual Sequencer) ................................................................68
SECTION 5GRAPHICAL USER INTERFACE (GUI)...............................................................................69
5.1 OPENING THE PROGRAM ......................................................................................................69
5.2 COMPONENTS OF THE MAIN WINDOW ...................................................................................71
5.2.1 Menu Bar ..............................................................................................................71
5.2.2 The Tool Bar .........................................................................................................72
5.2.2.1 Communicate Toolbar...............................................................................72
5.2.2.2 Operation Toolbar .....................................................................................74
5.2.2.3 General Toolbar ........................................................................................75
5.2.3 Application Screens (Tabs) ..................................................................................75
5.2.4 Status Bar .............................................................................................................76
5.3 COMMUNICATION BETWEEN THE COMPUTER AND THE ANALYZER ...........................................77
5.4 THE ANALYSIS TAB ..............................................................................................................79

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5.4.1 Field Names and Explanations.............................................................................79
5.4.2 Analysis Data........................................................................................................81
5.5 STATUS TAB ........................................................................................................................82
5.6 ALARMS TAB........................................................................................................................83
5.6.1 Global Alarms .......................................................................................................84
5.6.2 Analog Input Alarms .............................................................................................85
5.6.3 Analysis Alarms ....................................................................................................85
5.7 ARCHIVE TAB.......................................................................................................................86
5.7.1 The Table Format .................................................................................................86
5.7.2 The Graph Format ................................................................................................88
5.7.3 Filtering Data ........................................................................................................90
5.7.3.1 Filtering Data by Date ...............................................................................90
5.7.3.2 Filtering Data Numerically .........................................................................90
5.7.3.3 Exporting Data ..........................................................................................92
5.7.3.4 Log Configuration......................................................................................93
5.8 EVENTS TAB ........................................................................................................................95
5.9 GLOBAL TAB........................................................................................................................97
5.9.1 General .................................................................................................................98
5.9.1.1 Tape Box ...................................................................................................99
5.9.2 Global Alarms .....................................................................................................100
5.10 STREAMS TAB ...................................................................................................................101
5.10.1 Overview.............................................................................................................101
5.10.2 Universal Gas Run Commands ............................................................................103
5.10.3 The H2S and Total Sulfur Tab............................................................................103
5.10.3.1 Timing Commands ..................................................................................103
5.10.3.2 Switching .................................................................................................105
5.10.3.3 Frequency ...............................................................................................105
5.10.3.4 Analog Output Override ..........................................................................105
5.10.3.5 Stream Calibration Used .........................................................................106
5.10.3.6 Alarms .....................................................................................................106
5.10.4 Calibration, Reference and Zero Gas Tabs........................................................107
5.10.4.1 Calibration Tab........................................................................................107
5.10.4.2 Reference Tab ........................................................................................108
5.10.4.3 Zero Tab..................................................................................................108
5.10.4.4 Differences between the H2S/Total Sulfur Tabs and the
Calibration/Reference/Zero Gas Tabs ....................................................................109
5.11 INPUTS -DRY TAB.............................................................................................................110
5.11.1 Discrete Input Name...........................................................................................111
5.11.2 Enable & Alarm Check Boxes ............................................................................111
5.11.3 Polarity................................................................................................................111
5.11.4 Run Selector .......................................................................................................111
5.11.5 Action..................................................................................................................111
5.12 INPUTS -WET TAB ............................................................................................................112
5.13 OUTPUTS TAB....................................................................................................................113
5.13.1 Digital Outputs and Solenoids ............................................................................114
5.13.2 Analog Outputs...................................................................................................114
5.14 SEQUENCER TAB ...............................................................................................................115
5.14.1 Enables Entire Sequencer Operation Checkbox................................................115
5.14.2 Available Run Types...........................................................................................115
5.14.3 Sequencer Items ................................................................................................116
5.14.4 Manual Sequencer Request Checkbox..............................................................116
5.14.5 Digital Input Manual Sequencer Request Enable Checkbox .............................117
5.14.6 Manual Sequencer # 1 - 8 ..................................................................................117

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5.15 PORTS TAB........................................................................................................................118
5.16 MODBUS TAB.....................................................................................................................119
5.16.1 Enron ..................................................................................................................120
5.16.2 Modicon 16 .........................................................................................................121
5.16.3 Modicon with Floating Point................................................................................121
5.16.4 A Typical Modbus Setup.....................................................................................121
5.17 ANALOG INPUT TAB............................................................................................................125
5.17.1 Analog Input # ....................................................................................................125
5.17.2 Analog Input Parameters and Controls ..............................................................126
5.17.3 Analog Inputs Alarm ...........................................................................................126
5.18 TIMERS TAB.......................................................................................................................127
5.18.1 Schedule.............................................................................................................128
5.18.2 Analysis ..............................................................................................................128
5.18.3 Sequences..........................................................................................................128
5.19 MAINTENANCE TAB ............................................................................................................129
5.19.1 Entering the Calibration Mode............................................................................130
5.19.2 Calibrating Analog Outputs.................................................................................131
5.20 FACTORY TAB....................................................................................................................132
SECTION 6OPERATING THE SYSTEM.............................................................................................133
6.1 INTRODUCTION ..................................................................................................................133
6.2 EDITING A CONFIGURATION ................................................................................................133
6.2.1 Accessing the Active Configuration ....................................................................133
6.2.2 Types of Parameters in a Configuration.............................................................134
6.2.3 General Guidelines for Editing Parameters........................................................134
6.3 COMMONLY EDITED PARAMETERS ......................................................................................135
6.3.1 The Streams Tab................................................................................................135
6.3.2 Sequencer Tab ...................................................................................................136
6.4 LESS COMMONLY EDITED ANALYZER PARAMETERS.............................................................137
6.4.1 The Global Tab ...................................................................................................137
6.4.2 Dry and Wet Inputs.............................................................................................138
6.4.3 Outputs Tab........................................................................................................139
6.4.4 Timers Tab..........................................................................................................140
6.4.5 The Ports Tab.....................................................................................................141
6.4.6 Modbus Tab........................................................................................................142
6.5 CALIBRATING/VALIDATING THE ANALYZER OUTPUTS............................................................143
6.6 CALIBRATING/VALIDATING THE ANALYZER ...........................................................................144
6.6.1 Manual Calibration..............................................................................................144
6.6.2 Manually Initiated Auto Calibration.....................................................................145
6.6.3 Auto Calibration ..................................................................................................146
6.7 ANALYZING SAMPLES .........................................................................................................147
6.8 MONITORING SYSTEM OPERATION......................................................................................149
SECTION 7MAINTENANCE.............................................................................................................151
7.1 OVERVIEW.........................................................................................................................151
7.2. ROUTINE MAINTENANCE PROCEDURE .................................................................................151
7.3 CHANGING THE TAPE .........................................................................................................152
7.4 CHECKING THE H2SSAMPLE SYSTEM .................................................................................155
7.5 TOTAL SULFUR SAMPLE SYSTEM........................................................................................155
7.6 REPLACING THE QUARTZ TUBE IN THE TOTAL SULFUR SYSTEM............................................156
7.7 ADDING ACETIC ACID TO THE HUMIDIFIER ...........................................................................158

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SECTION 8TROUBLESHOOTING AND SERVICE................................................................................159
8.1 OVERVIEW.........................................................................................................................159
8.2 TROUBLESHOOTING MESSAGES AND ALARMS .....................................................................159
8.3 ALARMS TAB......................................................................................................................161
8.4 COMMONLY OBSERVED PROBLEMS ....................................................................................164
SECTION 9PROTECH903 H2S ANALYZER WIRING BOOK...............................................................166
SECTION 10 TECHNICAL SPECIFICATIONS ........................................................................................176
11.1 PERFORMANCE SPECIFICATIONS ........................................................................................176
11.2 FUNCTIONS........................................................................................................................176
11.3 COMMUNICATIONS /INTERFACE ..........................................................................................177
11.4 INSTRUMENT SPECIFICATIONS ............................................................................................178
SECTION 11 SPARE PARTS .............................................................................................................181
INDEX 183
SECTION 12 TABLES.......................................................................................................................186
SECTION 13 FIGURES .....................................................................................................................186

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Safety Symbols used in Manual
The Danger symbol indicates a hazardous situation that, if not
avoided will result in death or serious injury.
The Warning symbol indicates a hazardous situation that, if not
avoided could result in death or serious injury.
The Caution symbol with the safety alert symbol indicates a
hazardous situation that, if not avoided could result in minor or
moderate injury.
The Notice symbol is used to highlight information that will
optimize the use and reliability of the system.

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Important Safety Guidelines for the ProTech903 H2S and Total
Sulfur Analyzer
Please read the following warnings and cautions carefully before using the ProTech903 H2S and
Total Sulfur Analyzer
This equipment must be used as specified by the manufacturer or overall safety
will be impaired.
Access to this equipment should be limited to authorized, trained personnel ONLY.
: Due to the thermal mass of the hardware, cooling of the items takes substantial
time (total sulfur furnace in the total sulfur option only).
Observe all warning labels on the analyzer enclosures.
The analog outputs and alarm relay contacts may be powered by a source separate from the
one (s) used to power the analyzer system. Disconnecting the main power source may not
remove power from the analog output signals
Any safety recommendations or comments contained herein are suggested guidelines only.
Galvanic Applied Sciences Inc. bears no responsibility and assumes no liability for the use and/or
implementation of these suggested procedures.
This system, when operating in its normal mode, and/or when it is being serviced, maintained,
installed and commissioned contains items which may be hazardous to humans if handled or
operated incorrectly or negligently. These items include, but are not limited to;
a) High Voltage Electrical Energy
b) Toxic and Explosive Gases
c) High Temperature Surfaces (total sulfur furnace in the total sulfur option only)
The ProTech903 H2S and Total Sulfur Analyzer can be configured to be safely operated in a
Class 1, Div.1, Group B, C and D area, or a Class 1, Div 2, Groups B, C. D area or Ex protection:
II 2G, EEx d [ia] ia em II2B T3 (Tamb=50°) area.

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Manufacturer’s Warranty Statement
Galvanic Applied Sciences Inc. (“Seller”) warrants that its products will be free from defects in
materials and workmanship under normal use and service in general process conditions for 12
months from the date of Product start-up or 18 months from the date of shipping from Seller’s
production facility, whichever comes first (the “Warranty Period”). Products purchased by Seller
from a third party for resale to Buyer ("Resale Products") shall carry only the warranty extended by
the original manufacturer. Buyer agrees that Seller has no liability for Resale Products beyond
making a reasonable commercial effort to arrange for procurement and shipping of the Resale
Products. Buyer must give Seller notice of any warranty claim prior to the end of the Warranty
Period. Seller shall not be responsible for any defects (including latent defects) which are reported to
Seller after the end of the Warranty Period.
THIS WARRANTY AND ITS REMEDIES ARE IN LIEU OF ALL OTHER WARRANTIES OR
CONDITIONS EXPRESSED OR IMPLIED, ORAL OR WRITTEN, EITHER IN FACT OR BY
OPERATION OF LAW, STATUTORY OR OTHERWISE, INCLUDING BUT NOT LIMITED TO,
WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, WHICH SELLER SPECIFICALLY DISCLAIMS.
Seller’s obligation under this warranty shall not arise until Buyer notifies Seller of the defect.
Seller’s sole responsibility and Buyer’s sole and exclusive remedy under this warranty is, at
Seller’s option, to replace or repair any defective component part of the product upon receipt of
the Product at Seller’s production facility, transportation charges prepaid or accept the return of
the defective Product and refund the purchase price paid by Buyer for that Product. If requested
by Buyer, Seller will use its best efforts to perform warranty services at Buyer’s facility, as soon as
reasonably practicable after notification by the Buyer of a possible defect provided that Buyer
agrees to pay for travel time, mileage from the Seller’s facility or travel costs to the airport / train
station closest to Buyer’s facility plus all other travel fees, hotel expenses and subsistence.
Except in the case of an authorized distributor or seller, authorized in writing by Seller to extend
this warranty to the distributor’s customers, the warranty herein applies only to the original
purchaser from Seller (“Buyer”) and may not be assigned, sold, or otherwise transferred to a third
party. No warranty is made with respect to used, reconstructed, refurbished, or previously owned
Products, which will be so marked on the sales order and will be sold “As Is”.
Limitations
These warranties do not cover:
• Consumable items such as lamps.
• Analyzer components which may be damaged by exposure to contamination or fouling
from the process fluid due to a process upset, improper sample extraction techniques or
improper sample preparation, fluid pressures in excess of the analyzer’s maximum rated
pressure or fluid temperatures in excess of the analyzer’s maximum rated
temperature. These include but are not limited to sample filters, pressure regulators,
transfer tubing, sample cells, optical components, pumps, measuring electrodes,
switching solenoids, pressure sensors or any other sample wetted components.
• Loss, damage, or defects resulting from transportation to Buyer’s facility, improper or
inadequate maintenance by Buyer, software or interfaces supplied by Buyer, operation

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outside the environmental specifications for the instrument, use by unauthorized or
untrained personnel or improper site maintenance or preparation.
• Products that have been altered or repaired by individuals other than Seller personnel or
its duly authorized representatives, unless the alteration or repair has been performed by
an authorized factory trained service technician in accordance with written procedures
supplied by Seller.
• Products that have been subject to misuse, neglect, accident, or improper installation.
• The sole and exclusive warranty applicable to software and firmware products provided
by Seller for use with a processor internal or external to the Product will be as follows:
Seller warrants that such software and firmware will conform to Seller’s program manuals
or other publicly available documentation made available by Seller current at the time of
shipment to Buyer when properly installed on that processor, provided however that
Seller does not warrant the operation of the processor or software or firmware will be
uninterrupted or error-free.
The warranty herein applies only to Products within the agreed country of original end destination.
Products transferred outside the country of original end destination, either by the Seller at the
direction of the Buyer or by Buyer’s actions subsequent to delivery, may be subject to additional
charges prior to warranty repair or replacement of such Products based on the actual location of
such Products and Seller’s warranty and/or service surcharges for such location(s).
Repaired Products
Repaired products are warranted for 90 days with the above exceptions.
Limitation of Remedy and Liability
IN NO EVENT SHALL SELLER BE LIABLE TO BUYER FOR ANY INDIRECT,
CONSEQUENTIAL, INCIDENTAL, SPECIAL OR PUNITIVE DAMAGES, OR FOR ANY LOSS OF
USE OR PRODUCTION, OR ANY LOSS OF DATA, PROFITS OR REVENUES, OR ANY
CLAIMS RAISED BY CUSTOMERS OF BUYER OR ANY ENVIRONMENTAL DAMAGE OR ANY
FINES IMPOSED ON BUYER BY ANY GOVERNMENTAL OR REGULATORY AUTHORITIES,
WHETHER SUCH DAMAGES ARE DIRECT OR INDIRECT, AND REGARDLESS OF THE
FORM OF ACTION (WHETHER FOR BREACH OF CONTRACT OR WARRANTY OR IN TORT
OR STRICT LIABILITY) AND WHETHER ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES OR NOT.

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Section 1 ProTech903 H2S and Total Sulfur Analyzer
1.1 Overview
The Galvanic Applied Sciences ProTech903 H2S and Total Sulfur Analyzer is designed to
measure Hydrogen Sulfide (H2S) and total sulfur (with the optional total sulfur option) in up to
four gaseous streams.
1.2 Principle of Operation
When Hydrogen Sulfide (H2S) reacts with Lead Acetate (which is white), Lead Sulfide is
formed as shown in Equation 1-1.
Pb(CH3COO)2+ H2S

PbS + 2 CH3COOH 1-1
If a paper tape that has been impregnated with Lead Acetate is exposed to Hydrogen Sulfide,
brown stains will be seen on the tape. The rate of colour change on the tape is directly
proportional to the concentration of Hydrogen Sulfide in the gas stream. When the rate of
colour change is measured, the concentration of Hydrogen Sulfide in the gas stream can be
determined. The ASTM Methods used by the ProTech903 are D 4084-94, D4323-97 and
D4468-95. Analysis of Hydrogen Sulfide in Gaseous Fuels (Lead Acetate Reaction Rate
Method).
The total sulfur option includes a high temperature oven that is used to convert sulfur
containing compounds to H2S using H2.
The analyzer can use two different analysis algorithms to determine the concentration of H2S
in the sample.
•Standard Analysis (Peak Detect) - In the standard analysis method, the rate of stain
formation on the tape is monitored. The point at which the rate of stain is at a maximum
represents the concentration of H2S in the sample gas.
•Timed Analysis. In the timed analysis algorithm the average rate of stain on the tape is
calculated over a fixed period of time.
1.3 Analyzer Configurations
The analyzer is available in one of three different configurations:
1.3.1 Hydrogen Sulfide Only
The hydrogen sulfide only configuration allows the user to measure the hydrogen sulfide
content of a gas stream.
1.3.2 Hydrogen Sulfide and Total Sulfur
The hydrogen sulfide and total sulfur configuration allows the user to measure the hydrogen
sulfide and the total sulfur content of a gas stream. In this case the analyzer is equipped with
a total sulfur conversion furnace which will convert any sulfur bearing compounds in the gas

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to H2S. A 3 way solenoid valve is used to direct the gas either into the total sulfur conversion
furnace (in this case total sulfur will be measured) or not into the total sulfur conversion
furnace (in this case only H2S will be measured). The analyzer can be configured to
alternately measure H2S and Total Sulfur.
1.3.3 Total Sulfur Only
The total sulfur only configuration allows the user to measure the total sulfur content of a gas
stream. In this case the analyzer is equipped with a total sulfur conversion furnace which will
convert any sulfur bearing compounds in the gas to H2S.
1.4 Features of the Analyzer
The analyzer provides the following capabilities:
•The ability to measurement the H2S concentration over a 0-500 ppm range without dilution -
at least 12 times greater than traditional tape analyzers.
•A single analyzer can monitor up to four streams using different ranges. This multirange
capability replaces the need for separate analyzers calibrated each for separate streams
•Sensitivity as low as 10 ppb
•Rapid response
•Optical tape counter ensures exact spacing of stains and keeps track of tape consumption
•Unique humidifier system using a permeable membrane reduces dead volume providing
faster response time
•Rapid measurement of the extent to which H2S exceeds pre-set alarm levels.
•If the total sulfur option is included, H2S and total sulfur can be measured in different
ranges on the same analyzer.
•Low Operation and Maintenance Costs
•Uninterrupted operation with dual redundant AC and DC power supply
•Optional Ethernet communication
•USB port with easy to use Windows based PC software
•Enhanced data logging allows for up to ten months of data storage for complete audit trail
and trouble shooting and report generation.
•Built-in MODBUS communications / RTU capabilities and a large number of outputs and
inputs with sensor auto-calibration on each analysis and dual redundant power supply.
1.5 System Operating Control
The analyzer is controlled by a dedicated data acquisition system which provides supervisory
control, performs all calculations and provides the user interface.
The system includes an onboard computer system which provides full screen display of the
H2S concentration and total sulfur concentration (if the total sulfur option is present), key
system control parameters and their status.
A hand held key pad is provided for user interface with the analyzer. Operation of the system
with the keypad is described in Section 4. As an alternative, a PC based graphical user
interface (GUI) can be used to view and enter information on a remote basis (Section 5).

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1.6 Contents of this Manual
This manual contains the following information:
•Section 1: ProTech903 H2S and Total Sulfur Analyzer presents introductory information
about the system and the mode of operation.
•Section 2: Analyzer Components describes the design of the major components of the
system.
•Section 3:Installation describes unpacking the analyzer, installing it in the facility and
interfacing with other devices.
•Section 4: Operating the System via the Handheld Keypad describes how the user enters
data and views system parameters using the hand held controller module and on board
display panel
•Section 5: Graphical User Interface (GUI) presents a detailed discussion of the various
aspects of the application program on the personal computer.
•Section 6:Operating the System describes how to set up the system to perform analyses.
•Section 7: Maintenance includes a discussion of activities which should be performed on a
routine basis to optimize operation
•Section 8: Troubleshooting and Service presents information that is useful in diagnosing
problems with the analyzer and describes how various components are replaced.
•Section 9: Analyzer Q.C. Documentation includes the test documentation material used to
test the analyzer
•Section 10:ProTech903 H2S Analyzer Wiring Book includes diagrams to assist the
operator in interfacing auxiliary components such as relays, solenoids, etc. to the controller
module.
•Section 11: Technical Specifications presents the specifications for the analyzer.
•Section 12: Spare Parts lists a number of items which may be required to maintain
operation of the analyzer.

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Section 2 Analyzer Components
2.1 Overview
The ProTech903 H2S and Total Sulfur Analyzer is an integrated system designed to monitor
the concentration of H2S in a gaseous stream using the Lead Acetate tape method described
in Section 1. An overview of the major components of the analyzer is presented in Figure 2-1.
The total sulfur version of the ProTech903 includes the total sulfur furnace (Section 2.9).
An external sample conditioning system is available as an option (Section 2.10).
Figure 2-1: Schematic of ProTech903 Flow Path
The system includes the following major components:
•Motherboard (Section 2.2)
•Intrinsically Safe Barrier Board (Class I, Division 1 models only) (Section 2.3)
•Display Board, Keyboard, LED’s (Section 2.4)
•Chassis (Section 2.5)
•Tape Transport System (Section 2.6)

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•Sample Chamber Assembly (Section 2.7)
•Sample Flow Related Components (Section 2.8)
The total sulfur version of the ProTech903 includes the total sulfur furnace Section (2.9
Total Sulfur Option).
An external sample conditioning system is available as an option Section (2.10 Sample
Conditioning System).

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2.2 Motherboard
2.2.1 Description of the Motherboard
The motherboard is housed in an enclosure and consists of a large main board which houses
the system memory, system’s clock battery, the AC and DC power supplies, 6 isolated
analog outputs, 6 relays, 8 solenoids, 4 (Wet contact) discrete inputs and 4 (Dry contact)
discrete inputs. The type of enclosure the electronics is housed in will depend on the area
classification certification of the analyzer.
2.2.2 Boards Associated with the Motherboard
The main processor daughter board and an optional Ethernet card are associated with the
motherboard.
2.2.3 AC and DC Power Supply
The motherboard houses the AC and DC power supplies. The working AC voltage range is
100-230 VAC and the DC voltage range is 10-32 VDC.
If an AC supply is used, the analyzer uses the AC solenoid drivers which are black in colour.
If a DC supply is used, the analyzer uses the DC solenoid drivers which are Red in colour.
The analyzer can operate in a dual redundant power mode in which the DC power supply is
the backup if the AC power supply fails. It is important to note that in this mode the DC
solenoid drivers would be used.

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2.3 Intrinsically Safe Barrier Board (Peripheral Interface)
For Class 1, Division 1 systems, all electrical connections between the electronics enclosure
and the chassis must pass through an intrinsically safe barrier. The intrinsically safe barrier
connections are shown in Figure 2-2. Class 1, Division 2 analyzers do not employ an
intrinsically safe barrier.
Figure 2-2: Intrinsically Safe Barrier (Peripheral Interface) Connections
There are several connections that must pass through the barrier. The connections on the left
side of Figure 2-2 are on the hazardous side and come from the chassis. The connections on
the right of the figure are on the safe side. These connections are used for the keypad wiring,
power to both the sensor block and the Optical Encoder, and signal wiring to carry
communications between the sensor block and the electronics assembly.
2.4 LCD Display Board, Keypad and LED’s
2.4.1 User Interaction Features
The system presents the system status to the operator via a 128 x 64 LCD display on the
front panel. In addition, there are ten LED indicators which provide information about the
status of the system.
A hand held keypad is used to communicate with the system. Operation of the system via the
keypad is described in Section 4.
A detailed application program for a personal computer is provided to monitor the system,
view archived data and establish input and output protocols from/to external devices. A
detailed discussion of the user interface is presented in Chapter 5.

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20 August 02, 2019
2.4.2 Display Board Communication Ports
The system has two distinct communications ports housed on the display board. A USB/RS-
232 port is located on the right side of the display board. A pair of switches that can be set for
USB or RS232 communications is located on the reverse side of this board on the bottom left
hand corner. By default, the switch is set for USB usage.
A RJ-9/22 jack that can also be used for RS232 communications is located directly under the
LCD Display. There are jumpers located on the bottom left hand corner of the CPU board that
need to be set if this jack is to be used or if the Ethernet card is used. The Ethernet Card
option and the RJ-9/22 jack cannot be used simultaneously. See the drawing package for
Jumper positions.
2.5 Chassis
The chassis contains all of the mechanical parts of the system including the tape-advance
motor, the Optical Encoder used to accurately advance the tape, the lead acetate tape spool,
and the components related to the actual flow of sample gas and the measurement of the
concentration of H2S in the sample gas stream. A photo of the chassis with all the covers
removed is shown in Figure 2-3.
Figure 2-3: Chassis (All Covers Removed)