Galvanic Applied Sciences 943-TGX User manual

943-TGX
Automatic Process UV Spectrophotometer for Tail Gas Analysis
OPERATION MANUAL
P/N: MA7428
Revision 4
August 2019
Galvanic Applied Sciences, Inc.
7000 Fisher Road S.E.
Calgary, Alberta, T2H 0W3
Canada
Phone: [phone]
Fax: [phone]
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 Section 8.
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

Revision 4 3 August 02, 2019
Table of Contents
SECTION 1MODEL 943-TGX TAIL GAS ANALYZER SPECTROPHOTOMETER OVERVIEW......................12
1.1 OVERVIEW...........................................................................................................................12
1.2 ANALYTICAL METHOD...........................................................................................................13
1.3 ANALYZER DESIGN...............................................................................................................13
1.4 SAMPLING SYSTEM ..............................................................................................................14
1.5 SYSTEM OPERATING CONTROL.............................................................................................15
1.6 CONTENTS OF THIS MANUAL.................................................................................................15
SECTION 2INSTALLATION................................................................................................................16
2.1 RECEIVING THE SYSTEM.......................................................................................................16
2.2 ENVIRONMENTAL REQUIREMENTS.........................................................................................16
2.2.1 Electrical Requirements........................................................................................16
2.2.2 Temperature .........................................................................................................16
2.2.3 Space Requirements ............................................................................................16
2.2.4 Instrument Air .......................................................................................................16
2.2.5 Steam ...................................................................................................................17
2.2.6 Area Classification................................................................................................17
2.3 UNPACKING .........................................................................................................................17
2.4 INSTALLATION STEPS ...........................................................................................................18
2.4.1 Mounting of the Analyzer System.........................................................................18
2.4.2 Mating of the Process and Analyzer System Flanges..........................................20
2.4.3 Connection of the AC Power Service ...................................................................22
2.4.4 Connection of the Analog Signal Cables..............................................................22
2.4.5 Connection of the Digital Signal Cables ...............................................................22
2.4.6 Connection of Instrument Air Services .................................................................22
2.4.7 Connection (s) of Steam.......................................................................................23
2.4.8 Connection of the ‘Loss of Purge Signal’ .............................................................23
SECTION 3OPERATION...................................................................................................................24
3.1 OVERVIEW...........................................................................................................................24
3.2 FLOW CONTROL SETTINGS...................................................................................................24
3.2.1 Cabinet Purge Air Flow Adjust Valve ...................................................................24
3.2.2 Cabinet Cooler Air Valve ......................................................................................25
3.2.3 Condenser Cooling Air Flow Adjust Valve............................................................25
3.2.4 Zero Air Flow Adjust Valve ...................................................................................25
3.2.5 Aspirator Drive Air Flow Adjust Valve...................................................................26
3.2.6 System Regulator .................................................................................................26
3.3 ANALYZER OUTPUTS............................................................................................................27
3.3.1 Analog Outputs .....................................................................................................27
3.3.2 Digital Outputs ......................................................................................................28

Revision 4 4 August 02, 2019
SECTION 4SYSTEM CONTROL ........................................................................................................30
4.1 THE USER INTERACTION PROGRAM -OVERVIEW ...................................................................30
4.2 USING THE ONBOARD DISPLAY AND HAND HELD KEYPAD ......................................................30
4.2.1 The Onboard Display............................................................................................30
4.2.2 The Hand Held Keypad ........................................................................................31
4.3 THE ANALYSIS 1TAB ...........................................................................................................32
4.3.1 Online/Offline Button ............................................................................................32
4.3.2 Air Demand, H2 S, SO2, COS and Svap Fields .......................................................32
4.3.3 Relay Indicator Fields ...........................................................................................33
4.3.4 Manual Zero .........................................................................................................34
4.3.5 Back Purge ...........................................................................................................34
4.3.6 Graphic Display ....................................................................................................34
4.4 ANALYSIS 2PANEL...............................................................................................................35
4.5 INDICATORS PANEL ..............................................................................................................36
4.6 SPECTRUM PANEL ...............................................................................................................37
4.7 ABSORBANCE PANEL ...........................................................................................................39
4.8 CONFIG PANEL ....................................................................................................................40
4.8.1 Outputs Sub-Panel ...............................................................................................40
4.8.2 Calculation Sub-Panel..........................................................................................41
4.8.3 Display ..................................................................................................................44
4.8.4 Timers/Alarms ......................................................................................................45
4.8.5 Network Sub Panel...............................................................................................47
SECTION 5WEB BASED OPERATION................................................................................................49
5.1 OVERVIEW...........................................................................................................................49
5.2 ANALYSIS SECTION ..............................................................................................................50
5.2.1 Analysis Page.......................................................................................................50
5.2.1.1 Value Display ............................................................................................50
5.2.1.2 Status and Control ....................................................................................51
5.2.1.3 Relay Indicator Fields................................................................................52
5.2.1.4 Graphic Display.........................................................................................53
5.2.2 Calibration Matrix Page ........................................................................................54
5.2.3 Indicators Page.....................................................................................................55
5.2.4 Spectrum Curve Page ..........................................................................................56
5.2.5 Absorbance Page .................................................................................................57
5.3 PARAMETERS SECTION ........................................................................................................59
5.3.1 Parameters ...........................................................................................................59
5.3.2 Modbus .................................................................................................................60
5.3.2.1 Overview ...................................................................................................60
5.3.2.2 The Enron Modbus Protocol .....................................................................62
5.3.2.3 The Modicon 16 Protocol ..........................................................................62
5.3.2.4 Modicon with Floating Point Protocol........................................................62
5.4 FACTORY SECTION ..............................................................................................................63
5.4.1 Changing the Passwords......................................................................................64
5.5 HELP SECTION.....................................................................................................................65
5.5.1 Drawings...............................................................................................................65
5.5.2 User Manual .........................................................................................................65
5.5.3 Revision History....................................................................................................65

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SECTION 6MAINTENANCE...............................................................................................................66
6.1 OVERVIEW...........................................................................................................................66
6.2 ROUTINE PREVENTATIVE MAINTENANCE ...............................................................................66
6.2.1 Visual Inspection of Key Operating Parameters...................................................66
6.2.2 Maintenance Check Out Procedure .....................................................................68
6.3 CHANGING THE ANTI-SOLARANT SOLUTION...........................................................................70
6.4 OPTIMIZING THE SPECTROMETER ENERGY LEVEL..................................................................72
6.4.1 Automated Optimization .......................................................................................72
6.4.2 Manual Optimization.............................................................................................73
SECTION 7SERVICE .......................................................................................................................74
7.1 OVERVIEW...........................................................................................................................74
7.2 ANALYZER FAULT TABLE ......................................................................................................74
7.3 CHANGING THE UV SOURCE LAMP .......................................................................................77
7.4 CHANGING THE FIBRE OPTIC CABLE (S) ................................................................................80
7.5 MEASUREMENT CELL REMOVAL............................................................................................82
7.6 CELL WINDOWS REPLACEMENT............................................................................................84
7.8 MEASUREMENT CELL INSTALLATION......................................................................................85
7.9 STEAM PURGING THE SAMPLE PROBE ASSEMBLY..................................................................87
7.10 SPECTROMETER REPLACEMENT ...........................................................................................88
SECTION 8THE PRODUCT QUALITY ASSURANCE PROGRAM .............................................................89
8.1 OVERVIEW...........................................................................................................................89
8.2 OVERALL SYSTEM IDENTIFICATION........................................................................................89
8.3 QA DOCUMENT PACKAGE CHECK LIST AND REQUIREMENTS..................................................90
SECTION 9DRAWINGS ....................................................................................................................91
SECTION 10 SPECIFICATIONS............................................................................................................99
SECTION 11 RECOMMENDED SPARE PARTS ....................................................................................100
SECTION 12 THE PERIPHERAL BOARD.............................................................................................102
12.1 ACCESSING THE BOARD .....................................................................................................102
12.2 THE STATUS TAB ...............................................................................................................103
12.2.1 Information on the Status Tab ............................................................................103
12.3 MANUAL OVERRIDE TAB.....................................................................................................104
12.3.1 Analog Output Fields ..........................................................................................105
12.3.1.1 Calibrating and Testing the Analog Outputs ...........................................105
12.3.2 Testing the Digital Inputs ....................................................................................106
12.3.3 Testing Digital Outputs .......................................................................................106
INDEX .............................................................................................................................................107

Revision 4 6 August 02, 2019
Tables
TABLE 6-1: NORMAL VALUES OF KEY OPERATING PARAMETERS .........................................................67
TABLE 7-1: ANALYZER FAULT TABLE..................................................................................................76
TABLE 8-1: DOCUMENT PACKAGE CHECK LIST ...................................................................................90
TABLE 11-1: ONE YEAR KIT.............................................................................................................101
TABLE 11-2: TWO YEAR KIT ............................................................................................................101

Revision 4 7 August 02, 2019
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.
Applies to the 943-TGX-CE only.
Protective earth terminal.
943-TGX-CE

Revision 4 8 August 02, 2019
Important Safety Guidelines for the 943-TGX
Field Programmable Tail Gas Analyzer System
Please read the following warnings and cautions carefully before using the 943-TGX Tail Gas
Analyzer System:
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.
Observe all warning labels on the analyzer enclosures.
Install fuses of the Type and Rating as shown on the Fuse Identifier labels.
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 AC Mains Source (s) 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:
•High Voltage Electrical Energy
•Toxic and Explosive Gases
•Intense Ultraviolet Radiation
•High Temperature Surfaces
Installation of the system requires the opening of the process sample point to allow for the
insertion of the system sample probe assembly. To achieve this, removing the process access
point blind flange is necessary. When the flange is removed, toxic, hot (approximately
150ºC/300ºF) gases and molten sulfur may be expelled to the atmosphere until the system
sample probe and its associated flange are in place and securely fastened.
943-TGX-CE
Refer to the 943-TGX-CE User Manual Important Safety Guidelines for the
943-TGX-CE Tail Gas Analyzer System also.

Revision 4 9 August 02, 2019
It is recommended that the personnel installing the probe wear plant approved breathing air
apparatus, and approved personal protective equipment (i.e. gloves, coveralls and protective eye
wear) suitable for high temperature work. This applies even if the Tail Gas Line (Process Stream)
is believed to be at negative pressure.
During normal operation, toxic gases, (H2S, SO2, COS and CS2) are present in the tubing,
measurement cell, aspirator and all other system components through which the tail gas sample
flows. They should not be opened before the complete system is purged with zero gas (an inert
gas or instrument air), and the system is blocked using the two valves in the sample oven
identified as the Sample Flow and Vent Flow on/off valves.
Purging of the system should be performed with both valves in the open position and maintained
for approximately five (5) minutes. Once purging is complete, and with the purge gas still flowing,
the two valves should be switched to the Off position. The purge gas can now be shut off and the
tubing or associated apparatus opened.
The sampling system will be under positive pressure. Loosen a fitting and allow the pressure to
be released before completely disconnecting the tubing.
The entire system is enclosed in an oven cabinet that is heated and maintained at approximately
150ºC/300ºF to prevent the condensation of sulfur. Maintenance performed before the cooling of
the oven and hardware should be done while wearing suitable protective clothing, eye wear, and
gloves to prevent burns to the hands and arms.
The system includes an Ultraviolet spectrometer which employs a source that generates intense
UV radiation that is transmitted to the measurement cell and spectrometer through fibre optic
cables.
This radiation is extremely harmful to the naked eye and skin, even in short duration exposures.
Always extinguish the UV radiation source (lamp) before removing a fibre optic cable or the lamp
power supply cover by turning the AC power to the lamp power supply ‘Off’. Should the lamp be
turned on for any reason while the cover is off, ensure that certified eye protection is worn and
that the exposure is limited to the bare minimum.
Although the UV radiation is transmitted through a narrow diameter fibre, it should never be
viewed directly. The beam is extremely intense and will cause permanent eye damage. Should
visual inspection of the beam be required, point the end of the fibre at an inanimate object and
view the illumination reflection. Never expose human skin to the radiation from the optical fibres.
943-TGX-CE
Device Group: II 2 G.
Ex protection: II 2 G Ex d e ia mb px IIC T3 Gb.
Ambient Temperature: -20°C to +50°C.
The control cabinet purge gas is to be air only.

Revision 4 10 August 02, 2019
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

Revision 4 11 August 02, 2019
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.

Revision 4 12 August 02, 2019
Section 1 Model 943-TGX Tail Gas Analyzer
Spectrophotometer Overview
1.1 Overview
The use of a Tail Gas Analyzer to assist in the control of combustion air to acid gas ratios in
Claus Sulfur Recovery Plants is a standard procedure in industry. The plant tail gas is
analyzed using ultraviolet spectroscopy and an output signal that corresponds to the air
requirement is determined. This observed signal is proportional to the percentage change
required in the combustion air to provide stoichiometric concentrations of the principal
reactants; H2S and SO2. When the process is optimized and the correct stoichiometric
concentrations of H2S and SO2 are achieved, the feedback signal (normally referred to as Air
Demand) is zero (which means that no change is required).
The simplified Air Demand equation is:
Air Demand = F × ([H2S] - Rop [SO2])
where:
F = plant specific gain factor
[H2S] = concentration of H2S
[SO2] = concentration of SO2
Rop = operating ratio (typically 2)
When the stoichiometric concentrations of H2S and SO2 ([H2S] / [SO2]) are equal to 2, the
Air Demand output becomes zero regardless of the plant specific gain factor (F) when the
operating ratio (Rop) is two (2). When the plant specific gain factor (F) is established for a
particular process, the units of Air Demand become ‘percent change required in process air’.
(i.e., a computed Air Demand of +1.5% means that the process is 1.5% excess in air.) To
achieve optimum performance of the Claus Sulfur Recovery Plant, the Air Demand should be
kept near zero.
The sample gas obtained from the sulfur plant waste or tail gas stream may also contain
other sulfur species such as COS, CS2, and Svapour. These species, if present in significant
concentrations, must be analyzed for and a correction be made to avoid interference with the
H2S and SO2 analysis.

Revision 4 13 August 02, 2019
1.2 Analytical Method
The analyzer uses a spectrometer with a diffraction grating that is optimized in the spectral
region where the species of interest absorb (the compounds of interest absorb between 200
and 400 nm) coupled to a detection system that maximizes sensitivity and resolution while
minimizing dark current and stray light noise (a 2048 element CCD detector is employed).
The UV radiation is supplied by a highly stable deuterium broadband source and is
transmitted to/from the measurement cell via UV fibre optic cables. This approach provides
for analytical accuracy and allows for more precise multi-species analysis than that of a
conventional photometer which uses narrow band optical filters. The conventional photometer
measures only a few discrete wavelengths and spectrometers having lower resolution and
fewer elements in the detector are also less precise.
If, as is frequently the case, more than one of the sulfur containing compounds indicated
above are present, their spectra will overlap. The system uses a deconvolution protocol to
separate the signals for each component via a multi component algorithm.
1.3 Analyzer Design
The Model 943-TGX Analyzer System is packaged in two (2) frame mounted cabinets:
a) An oven cabinet which contains the sample handling system and associated hardware
(i.e., solenoids, oven, heaters, etc.). All electrical equipment residing in the oven cabinet
is installed using appropriate explosion proof and/or intrinsically safe wiring methods.
b) A control cabinet which contains the electrical hardware necessary for the operation of
the analyzer. Under normal operating circumstances, the interior of the control cabinet
maintains a general purpose area classification through a purge system. Both visual and
electrical (contact closure) indications are provided for monitoring the status of the control
cabinet purge.

Revision 4 14 August 02, 2019
1.4 Sampling System
The Analyzer system utilizes a close coupled mounting arrangement of the measurement cell
to the tail gas process sampling point to minimize the sample system length. The short length
allows for analyzer response times to be optimized while sample transport problems are
mitigated. A small volume of tail gas sample is educted through the measurement cell where
the concentrations of the various species are determined photometrically.
The measurement sample is drawn from a central point of the process duct using a
specifically sized sample probe. After measurement, the process sample (mixed with the
educting media) is vented to the wall of the process duct. The concentric chamber design of
the sample probe provides both the eduction and venting of the tail gas sample through a
single sampling point on the process duct.
The sample probe incorporates a mechanism for reducing the dew point of sulfur vapour in
the sampled gas stream. Instrument air can be introduced to provide an exposed cool surface
to the incoming sample gas. Excess condensed sulfur is hydrostatically returned to the
process duct. The sulphur vapour concentration is measured and displayed on the analyzer
display. The sulphur vapour concentration is useful for system troubleshooting.
Incoming sample gas is filtered to 60 micron and drawn through the measurement cell by the
aspirator. The measurement cell exposes a known length of sample to UV radiation for
spectroscopic analysis. The aspirator is integral to the measurement cell and uses instrument
air (or other inert gas) as the educting media. The analyzer turns on the aspirator drive media
only when a ‘no fault’ state exists.
Analyzer zeroing is accomplished by introducing higher pressure instrument air (or other inert
gas) upstream of the measurement cell. The zero gas flushes the entire sample system
(probe to vent) and allows readings to be taken through the measurement cell when no
absorbing species are present. To the sample system, zeroing and back purging are the
same thing. The default state (power ‘off’) of the analyzer is to have the sample system in the
back purge (zeroing) mode. Valving is provided for isolating the sample system components
from the process stream. A provision is included in the oven plumbing for the steam purging
of the sample probe after a plant shut-down or turn-around, should it be required.
A temperature-controlled oven maintains all components exposed to the tail gas sample at
higher than dew point values. The oven and sample probe are mounted to an interface plate,
which in turn is directly mounted to the steam heated process duct sample nozzle (typically a
2 inch, 150 pound pipe flange configuration). Electrical heat is applied to the measurement
cell to achievee precise temperature control.

Revision 4 15 August 02, 2019
1.5 System Operating Control
The analyzer system operation 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 a graphic display of key
system control parameters and their status, a digital display of the instantaneous value of the
Air Demand, H2S, SO2, and COS, and historical graphic displays of the Air Demand, H2S and
SO2. The display monitor is mounted on the door of the control cabinet. Cabinet access is not
required for viewing or operation.
The Air Demand, H2S, SO2, and AO4 outputs can be configured as loop-powered 4 – 20 mA
signals and the system status can be provided via relay contacts. As an option, the AO4
output can be configured to output Air Demand, H2S, SO2, COS, Sigma S (the sum of the
H2S and SO2concentrations), or H2S/SO2ratio. An RS485 serial port is also provided which
can be used for available for Modbus communication.
A hand held key pad is provided for user interface with the analyzer. Operation of the system
with the keypad is described in Section 4.2. As an alternative, a web based graphical user
interface (GUI) can be used to view and enter information on a remote basis (Section 4.3).
1.6 Contents of this Manual
This manual contains the following information:
•Section 1: Model 943-TGX Tail Gas Analyzer Spectrophotometer Overview presents
introductory information about spectrophotometry and the system.
•Section 2: Installation describes unpacking the analyzer, installing it in the facility and
interfacing with other devices.
•Section 3: Operation of the System explains how the operator interacts with the analyzer.
•Section 4: Control of the System describes how the user enters data and views system
parameters.
•Section 5: Operating the Spectrophotometer via the Controller Module describes the role of
the keypad controller.
•Section 6: The Graphical User Interface presents a detailed discussion of the various
aspects of the application program on the personal computer.
•Section 7: Operating the System discusses routine operation of the analyzer.
•Section 8: Maintenance and Troubleshooting includes a discussion of required
maintenance activities and presents information that is useful in diagnosing problems with
the analyzer.
•Section 9: Wiring Book includes information about interfacing auxiliary components such
as relays, solenoids, etc. to the controller module.
•Section 10: Spare Parts lists a number of items which may be required to maintain
operation of the analyzer.
•Section 11: Specifications presents the specifications for the analyzer.

Revision 4 16 August 02, 2019
Section 2 Installation
The initial installation of the analyzer system is usually completed by the
purchaser. The start-up and commissioning is usually performed by
Galvanic Applied Sciences Inc. personnel.
2.1 Receiving the System
When the system arrives, inspect the packaging for external signs of damage. If there is any
obvious physical damage, contact the shipping agent and Galvanic Applied Sciences to
report the damage and request that the carrier's agent be present when the unit is unpacked.
It is recommended that you retain the shipping container so that it may be used for future
shipment of the unit, if necessary.
2.2 Environmental Requirement
2.2.1 Electrical Requirements
The power input is 100 – 240 Vac, 1 phase, 50/60 Hz, 800 W. The operating voltage is
specified on the serial number name plate
2.2.2 Temperature
The system is designed to be operated at ambient temperatures from 10 – 50oC. Galvanic
offers complete analyzer shelters from sun shades to complete building, please contact
Galvanic Applied Sciences, Inc. (or your local representative) for additional information.
2.2.3 Space Requirements
The system includes two cabinets, each are 30” (76 cm) H x 24” (61 cm) W x 12” (30 cm) D.
The overall outer dimension of the system with the mounting frame is 41.75” (106 cm) H x 57”
(145 cm W) x 16” (41 cm) D. The weight of the system is approximately 275 lb (125 kg), the
actual weight will depend on the system.
2.2.4 Instrument Air
The system requires 22 SCFM (37m3/hr) at 80-100 psi (37m3/hr 5.5 – 8barg).
943-TGX-CE
Refer to the 943-TGX-CE User Manual Sections 2.1, 2.2, 2.3, 2.4, 2.5, and
2.6.

Revision 4 17 August 02, 2019
2.2.5 Steam
Two supplies are required:
•Nozzle: Pressure = 40-80 psi, maximum temperature = 160oC
•Oven Heater: Pressure = 140-175 psi, maximum temperature = 200oC
2.2.6 Area Classification
2.3 Unpacking
The 943-TGX analyzer system is packed for shipment in a wooden crate.
To unpack the system:
a) Remove the lid by undoing the marked lag bolts.
b) Once the lid is off, remove the excess packing material, boxes and sample probe from
the shipping crate. The sample probe will be wrapped in packing material. Probes with a
guide length of 5.5 feet or longer are packed in a separate crate.
c) Visually inspect the small packages and the sample probe to ensure that no major
damage has occurred. If damage has occurred, contact the shipping company and
Galvanic Applied Sciences. Place the small packages and the sample probe aside in a
safe, secure storage area as they are not needed at this stage of the system installation.
The analyzer weighs approximately 275 lb/125 kg. Use suitable precautions
when removing it from the crate and placing it in the facility.
d) Locate and remove the four (4) bolts that secure the analyzer framework to the 2' x 4'
boards at the bottom of the shipping crate.
e) Once the bolts are removed the analyzer system can be lifted from the crate.
f) Lay the analyzer system frame onto a structurally strong and level surface and inspect for
any visual damage.
943-TGX-CE
Device Group: II 2 G.
Ex protection: II 2 G Ex d e ia mb px IIC T3 Gb.
Ambient Temperature: -20°C to +50°C.
943-TGX-CE
Steam is supplied to the nozzle only. There is no requirement for oven heater
steam on the 943-TGX-CE. There is no steam heater in 943-TGX-CE oven.

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g) Remove the plastic wrap from the analyzer system to gain access to the doors of the
cabinets.
h) Open the cabinet doors and carefully remove the packing material from inside each of
the two (2) analyzer cabinets.
Care should be taken while removing the cabinet packing material so that
no hardware or wiring is damaged.
i) Inspect the internal equipment to ensure that no damage has occurred and that no
components have become loose during transport.
If any damage is visible contact Galvanic Applied Sciences Inc. immediately and do not
proceed with the system installation. Do not attempt to facilitate repairs yourself as this
will negate and/or invalidate any possible insurance claim or equipment warranty.
j) If no damage is apparent, the analyzer system is ready for transport to the installation
(sample point) site. The analyzer system framework has two (2) lifting rings located at the
top. Installation of proper clevises is recommended. The lifting rings are rated for
approximately 227 kg / 500 lbs per ring.
2.4 Installation Steps
Installation of the 943-TGX analyzer system consists of the following steps
•Mounting of the Analyzer System (Section 2.4.1)
•Mating of the Process and Analyzer System Flanges (Section 2.4.2)
•Connection of the AC Power Service (Section 2.4.3)
•Connection of the Analog Signal Cables (Section 2.4.4)
•Connection of the Digital Signal Cables (Section 2.4.5)
•Connection of the Instrument Air Services (Section 2.4.6)
•Connection of Steam (Section 2.4.7)
•Connection of the ‘Loss of Purge Signal’ (Section 2.4.8)
The user should read each step and make certain that it is fully understood
before proceeding to installing the analyzer.
2.4.1 Mounting of the Analyzer System
The framework that is used in the analyzer system must be securely attached to a support
structure provided by the end user. The support structure must be positioned so that when
the analyzer framework is bolted in place, the flange of the analyzer cabinet and the process
sample access point are correctly aligned. The plant support structure should be suitable for
mounting the analyzer frame as shown in the Mounting drawing (Figure 2-1). An overview of
the service connections is presented in Figure 2-2.
The steam jacketed ball valve must be installed on the process sample point before mounting
the analyzer system.

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The Steam jacketed ball valve must remain closed until the sample probe is
installed and connected in the sample handling oven.
Figure 2-1: Analyzer Dimensions
Figure 2-2 indicates the location of the various connections that have to be made.

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Figure 2-2: Service Connections
2.4.2 Mating of the Process and Analyzer System
Flanges
The analyzer is shipped with a 316 SS blind flange plate and gasket mounted inside the oven
compartment to prevent the process gas from flowing into the compartment before installation
of the sample probe assembly. Check to ensure that this blind flange is in place and secure.
Explosive, toxic and hot gases and molten sulfur may be released once the
stream jacketed ball valve is opened. All company and/or regulatory
943-TGX-CE
Refer to the 943-TGX-CE User Manual Section 2.7.2.
943-TGX-CE
There are no oven steam supply fittings on the 943-TGX-CE.