Southland H2S-625 User manual

H2S-625
Hydrogen Sulde Analyzer
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Rev 1.01 July 5th, 2023_BB
Instruction Manual
H2S-625 Hydrogen Sulde Analyzer
ATEX and IECEx Certied for Hazardous Areas

Part 1 Introduction
Part 2 Installation
Part 3 Operation
Part 5 Annexures
Part 4 Maintenance
1.1 General Introduction
1.2 PrincipleofOperation-TheHydrogenSuldeSensor
1.3 H2S-625Specications
1.4.1 General Safety Information (VAC)
1.4.2 General Safety Information (VDC)
1.5 Location Installation Considerations
1.6 Safety Considerations
2.1 ReceivingYourNewHydrogenSuldeAnalyzer
2.2 MountingTheHydrogenSuldeAnalyzer
2.3.1 Electrical Connections (VAC)
2.3.2 Electrical Connections (VDC)
2.3.3 EarthGroundingTheAnalyzer
2.4 Gas Connections
2.5 InstallingTheHydrogenSuldeSensor
2.6 Integral Sample System Flow Diagram
2.7 Sensor Selection
3.1 Understanding The Controls and Their Operation
3.2 Manual Range Output Adjustment
3.3 Analog Output 4 - 20mA or 1 - 5 VDC
3.4 Advanced Integral Alarms
3.5 Setting a Custom Range
3.6 Output Simulation
3.7 Output Calibration
4.1 SpanCalibrationUsingCertiedSpanGas
4.2 Procedure for Replacing the Sensor
4.3 Troubleshooting
5.1 Spare Parts List
5.2 Warranty
5.3 Material Safety Data Sheets
5.4 ConformanceCerticate
5.5 Modbus Instructions
5.6 Explosion Proof Electrical Connections
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Table of Contents
H2S-625 Hydrogen Sulde Analyzer

1.1 General Introduction
TheSouthlandSensingH2S-625HydrogenSuldeAnalyzerisamicroprocessorbasedonlineunitde-
signedforcontinousmeasurementsinavarietyofhazardousareaapplicationsandgasmixtures.The
AnalyzeriscertiedforuseinZone1GroupIIB+H2(ATEX,IECExandUKEX).
Theanalyzerwasdesignedwiththecustomerinmind,keepingtheoperationssimplewhilestillfeatur-
ingafastresponseandruggeddesign.Everyeorthasbeenmadetousemodernindustrialcompo-
nents and materials which has resulted in an advanced design, excellent performance, and an overall
low cost of ownership.
TheanalyzerhasnumerousoptionsincludingVACorVDCpowerinputwithanisolatedanalog4-
20mA or 1-5 VDC concentration output and optional digital RS485 Modbus RTU output meeting most
hydrogensuldeanalysisapplications.
Southland Sensing Ltd. appreciates your business and recommends reading through the complete
manualtobeabletogetthefullexperiencefromyournewhydrogensuldeanalyzer.
1.2 Principle of Operation - The Hydrogen Sulde Sensor
TheprecisionelectrochemicalhydrogensuldesensorusedintheH2S-625isdesignedandmanufac-
tured under a strict quality procedure.
Tounderstandhowthehydrogensuldeanalyzerfunctions,itisimportanttounderstandalittlebitof
the sensor characteristics.
Theactivecomponentsintheprecisionelectrochemicalhydrogensuldesensoraretheanode,cath-
ode,andaqueouselectrolytewhichareallhousedinthecellbody.Thehydrogensuldemoleculesin
the application pass through the front sensing membrane into the electrolyte, where a chemical reac-
tion occurs and a raw electrical current is generated.
TheseanalyzersneedtobecalibratedusingaspangaswithaknownH2Svalue.It’simportanttocali-
bratewiththesameowrateasyourprocessgas,werecommendaowbetween0.5-1.5SCFH.
Thiselectricalcurrentisproportionaltotheamountofhydrogensuldeintheapplication.Theanalyz-
er then processes this raw electronic signal, compensates for temperature, barometric pressure, and
owvariations,andconvertsthedataintoaparts-per-millionhydrogensuldemeasurementvalue.
Thehydrogensuldeconcentrationreadingisthendisplayedinrealtimeonthefullbacklitdisplayand
the user can automate the control of their process using any of the output signals which can be run to
Introduction
H2S-625 Hydrogen Sulde Analyzer
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com

Precision Electrochemical H2S Sensor
Designed for Natural gas & Biogas Applications
F.S. Ranges of 0 - 10 ppm up to 0 - 10000 ppm
Cost Eective and Low Maintenance
Large Backlit Display
Intuitive User Friendly Interface
Optional MODBUS RS485 RTU
2 Fully Congurable Alarm Relay Contacts
Specications:
Accuracy: < +/-1% Full Scale Range*
Alarms: 2 Congurable Relay Contacts
Analyzer Range: Multiple up to 0 - 10000 ppm
Area Classication: Zone 1 IIB + H2
Dimensions: 12” x 12”x 5.25”
Flow: 0.50 - 5.0 SCFH
Gas Connections: 1/4” Compression Tube
Output: Isolated 4 - 20mA or 1 - 5 VDC
Power: 12 - 24 VDC
100 - 240 VAC
Pressure 0.1 - 50 PSIG Inlet, vent to atm
Response Time: T90 in 45 Seconds
Sample System: Optional
Sensor: Precision Electrochemical Cell
Temperature: 0 to 50 deg C
Warranty Sensor: 12 Months
Warranty Electronics: 12 Months
Weight: 21 lbs
*Accuracy at constant conditions
Applications:
“Inquiry for Application Expertise”
• Natural Gas Extraction & Pipelines
• Natural Gas Processing
• Landll Gas Monitoring
• Biogas before and after the H2S Scrubber
• And Many Other Industrial Applications
ProductSpecicationSheet
H2S-625 H2S Analyzer
HazardousAreaOnlineProcessHydrogenSuldeAnalyzerw/SampleSystem
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Cross Sensitivity
Sensor response per 100 ppm of gas present:
Methyl Mercaptan: 40 ppm
Carbon Monoxide: 4 ppm
Hydrogen: 1 ppm
Sulfur Dioxide: 18 ppm
ATEX and IECEx Certied for Hazardous Areas
Optional Congurations:
- Sample System Add-On Components
- Bi-Directional RS485 Modbus RTU
- Extreme Weather Packaging
- Extended Temperature Ranges
Rev 1.09 July 5th, 2023_BB
2804

H2S-625 H2S Analyzer Product Specications
H2S Analyzer: H2S Sensor Technology:
Order Information:
Power Requirements:
H2S Sensors:
Record Part Number with selected options in Blank Indicated Area of Form
Model Number:
H2S-625H2SAnalyzer
Selected Range & Sensor:
1 0 - 200 PPM; H2S-1x PPM H2S Sensor (Ranges: 0 - 10 ppm, 0 - 50 ppm, 0 - 100 ppm, 0 - 200 ppm)
2 0 - 2000 PPM; H2S-2x PPM H2S Sensor (Ranges: 0 - 100 ppm, 0 500 ppm, 0 - 1000 ppm, 0 - 2000 ppm)
3 0 - 10000 PPM; H2S-3x PPM H2S Sensor (Ranges: 0 - 1000 ppm, 0 - 2000 ppm, 0 - 5000 ppm, 0 - 10000 ppm)
H2S-625 - - -
The H2S sensor used in the H2S-625 is based on the galvanic
electrochemical fuel cell principal. All H2S sensors are manu-
factured under a strict quality program.
The sensors are self-contained and minimal maintenance is
required - no need to clean electrodes or add electrolyte.
TheSouthlandSensingprecisionH2Ssensorsoerexcel-
lentperformance,accuracyandstabilitywhilemaximizingthe
expected life.
H2S-1x PPM H2S Sensor: 0 - 200 Max PPM Range
H2S-2x PPM H2S Sensor: 0 - 2000 Max PPM Range
H2S-3xPPMH2SSensor:0-10000MAXPPMRange
H2S sensors should be periodically calibrated. Factory recom-
mendation is every 1 - 3 months or as the application dictates.
Sensorsoerexcellentlinearitywhencalibratedtoacertied
span gas.
ThemodelH2S-625HydrogenSuldeanalyzer
combinesaruggeddesignwithSSO2’sprecision
H2S sensors. The result is a highly reliable and cost
eectivecompactdesignwithaneasy-to-useuser
interfacedesignedspecicallyfortheNaturalGas
and biogas industries.
TheoxygenanalyzeriscertiedforuseinZone1
IIB+H2applications.
TheH2Sanalyzerisisolatedbothonthepower
input and analog output. This eliminates most
electronic gremlins seen with existing competitive
equipmentintheeld.
Gasconnectionsaremadewith1/4”Compression
tubettings.SampleSystemsincludesSample/
Spanvalveandowmeter.
TheH2S-625analyzercomeswithanoptional
MODBUSRS485RTUBi-DirectionalCommunication
protocol.
Input Power: 12 - 24 V DC
Current Draw: 50 mA
** Optional power input choices available
Use This Part Number When Ordering
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Electronics Package:
4 12 - 24V DC Input Power
4M12-24VDCInputPower+MODBUSRS485RTU
7 100 - 240 VAC Input Power
7M100-240VACPower+MODBUSRS485RTU
Gas Connections:
41/4”CompressionTubeFittingswithSample/SpanValve&Flowmeter
6 6 mm CompressionTubeFittingswithSample/SpanValve&Flowmeter
DDeleteSample/SpanValve&FlowMeter,1/8”CompressionTubeFittings
Rev 1.09 July 5th, 2023_BB

H2S-625 H2S Analyzer Product Certications
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Rev 1.09 July 5th, 2023_BB
ATEX:
Southland Sensing Ltd.
4045 E. Guasti Rd. Suite 203, Ontario, CA 91761 USA
H2S-625 Series Hydrogen Sulde (H2S) Analyzer
ExVeritas 23ATEX1653X
II 2 G
Ex db ib IIB+H2 T4 Gb
Tamb -20⁰C to +50⁰C
IECEx:
Southland Sensing Ltd.
4045 E. Guasti Rd. Suite 203, Ontario, CA 91761 USA
H2S-625 Series Hydrogen Sulde (H2S) Analyzer
IECEx EXV 23.0038X
II 2 G
Ex db ib IIB+H2 T4 Gb
Tamb -20⁰C to +50⁰C
2804
2804

1.4.1 General Safety & Installation (VAC)
ThissectionsummarizestheprecautionsapplicabletotheH2S-625HydrogenSuldeAnalyzer.Ad-
ditionalprecautionsspecictothisanalyzerarecontainedinthefollowingsectionsofthemanual.To
operatetheanalyzersafelyandtoobtainthebestperformance,followthebasicguidelinesoutlinesin
thisowner’smanual.
CAUTION:
WARNING:
CAUTION:
Thissymbolisusedthroughouttheowner’smanualtowarnandalertthe
user of the presence of electrostatic discharge.
Thissymbolisusedthroughouttheowner’smanualtocautionandalert
theusertorecommendedsafetyand/oroperatingguidelines.
Thissymbolisusedthroughouttheowner’smanualtocautionandalert
the user that this device is operated on AC Voltage (VAC)
READ INSTRUCTIONS:Beforeoperatingthehydrogensuldeanalyzer,readtheinstructions.
RETAIN INSTRUCTIONS:Thesafetyprecautionsandoperatinginstructionsfoundintheowner’s
manual should be retained for future reference.
FOLLOW INSTRUCTIONS: Observe all precautions and operating instructions. Failure to do so may
result in personal injury or damage to the transmitter.
H2SANALYZERLABEL:
Introduction
H2S-625 Hydrogen Sulde Analyzer
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Model Number: H2S-625
Serial Number: 0036785
Hydrogen Sulde Analyzer
Voltage: 100 - 240 VAC
Max Current: 100mA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA
Ph: [phone] Web: www.sso2.com
ThissectionisforACpoweredanalyzers,ifyouranalyzerisDCpoweredproceedtothenextpage.
PleaserefertoAppendix5.6formakingelectricalconnectionsthatmaintainsthedesiredlevelof
protection.

1.4.2 General Safety & Installation (VDC)
ThissectionsummarizestheprecautionsapplicabletotheH2S-625HydrogenSuldeAnalyzer.Ad-
ditionalprecautionsspecictothisanalyzerarecontainedinthefollowingsectionsofthemanual.To
operatetheanalyzersafelyandtoobtainthebestperformance,followthebasicguidelinesoutlinesin
thisowner’smanual.
CAUTION:
WARNING:
CAUTION:
Thissymbolisusedthroughouttheowner’smanualtowarnandalertthe
user of the presence of electrostatic discharge.
Thissymbolisusedthroughouttheowner’smanualtocautionandalert
theusertorecommendedsafetyand/oroperatingguidelines.
Thissymbolisusedthroughouttheowner’smanualtocautionandalert
the user that this device is operated on DC Voltage (VDC)
READ INSTRUCTIONS:Beforeoperatingthehydrogensuldeanalyzer,readtheinstructions.
RETAIN INSTRUCTIONS:Thesafetyprecautionsandoperatinginstructionsfoundintheowner’s
manual should be retained for future reference.
FOLLOW INSTRUCTIONS: Observe all precautions and operating instructions. Failure to do so may
result in personal injury or damage to the transmitter.
H2SANALYZERLABEL:
Introduction
H2S-625 Hydrogen Sulde Analyzer
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Model Number: H2S-625
Serial Number: 0036785
Hydrogen Sulde Analyzer
Voltage: 12 - 24 VDC
Max Current: 50mA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA
Ph: [phone] Web: www.sso2S.com
ThissectionisforDCpoweredanalyzers,ifyouranalyzerisACpoweredseethepreviouspage.
PleaserefertoAppendix5.6formakingelectricalconnectionsthatmaintainsthedesiredlevelof
protection.

1.5 Location Installation Considerations
1.6 Safety Considerations
Thehydrogensuldeanalyzerisdesignedforinstallationintoeitherageneralpurposearea,orZone1
IIB+H2.
Theanalyzerconsistsoftwoenclosuresmountedonasinglebackpanel.ThesmallAdaletenclosure
on the left side is explosion-proof and contains the electrical connections for the user such as power,
alarms,analogoutput,anddigitalMODBUSoutput(ifapplicable).Thisexplosion-proofenclosurealso
contains the power supply and safety components for the other enclosure. The enclosure on the right
contains the analytical circuitry, the oxygen sensor, and the oxygen sensor housing. This circuitry is
designedforintrinsicsafetyandmeetsrequirementsforZone1IIB+H2.
WheninstallingaZone1IIB+H2devicepleasefollowyourlocalelectricalcodeshouldtheareaneed
tobedeclassiedpriortoinstallation.
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Introduction
H2S-625 Hydrogen Sulde Analyzer
TheSouthlandSensingH2S-625H2SAnalyzerisdesignedtobemountedonawalloronapipeina
generalpurposeorZone1IIB+H2area.Wheninstalledoutdoorsinextremecoldareasaheavyduty
heatedenclosureisrecommended.Consideralsogivingtheanalyzerasunshieldifitisgoingtobe
mounted in the direct sunlight.
Referenceyourlocalelectricalauthorityfortheproperinstallation.Referencesection5.6forspecic
gland requirements.
Seals/glandsarerequiredonthepowerandsignalconduletentries,referenceyourlocalelectrical
authority for the proper installation and section 5.6.
TheanalyzerisEMI/RFIprotected,howeveritisgoodpracticenottomountittooclosetosources
of electrical interference such as large transformers, motor start contactors, relays, large pumps, etc.
Alsoavoidsubjectingtheanalyzertosignicantvibration.
Mount the unit at a suitable eye level to easily read the local display. Gas connections are located on
thetoprightsideoftheanalyzer,ensurethereisadequateroomtohookupyourgaslines.

2.1 Receiving Your New Hydrogen Sulde Analyzer
Assoonasyoureceiveyournewhydrogensuldeanalyzercarefullyunpacktheunitandaccessoriesand
inspecttheinteriorandexterioroftheanalyzerfordamage,andalsoverifythehydrogensuldesensoris
present.
Ifdamagetoanyportionofthenewanalyzerispresent,stopandreportdamagetotheshippingcom-
pany as well as the factory.
Theanalyzerisshippedwithallmaterialsneededtoinstallandpreparethesystemforoperation.In
some instances, added sample system components are necessary to condition the gas sample before en-
teringthesensorhousing.SouthlandSensingoersfreeapplicationconsultationandweencourageyou
totakeadvantageofourengineersandtheirexpertise.
ItisalsoimportanttobemindfulofEMI/RFInoiseinterference.ProtectionfromEMI/RFInoiseisim-
portant for accurate readings.
Installation
H2S-625 Hydrogen Sulde Analyzer
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com