Southland H2S-625 Instruction Manual

Hydrogen sulfide analyzer

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H2S-625 Hydrogen Sulfide Analyzer

Instruction Manual

H2S-625

Hydrogen Sulfide Analyzer

ATEX and IECEx Certified for Hazardous Areas

Rev 1.01 July 5th, 2023_BB

Designed, Tested, and Assembled in California, USA

4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : sales@sso2.com : www.sso2.com

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Page 1 H2S-625 Hydrogen Sulfide Analyzer Instruction Manual H2S-625 Hydrogen Sulfide Analyzer ATEX and IECEx Certified for Hazardous Areas Rev 1.01 July 5th, 2023_BB Designed, Tested, and Assembled in California, USA 4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : sales@sso2.com : www.sso2.com...
Page 2: Table Of Contents
H2S-625 Hydrogen Sulfide Analyzer Table of Contents Part 1 Introduction General Introduction 1.2 Principle of Operation - The Hydrogen Sulfide Sensor 1.3 H2S-625 Specifications 1.4.1 General Safety Information (VAC) 1.4.2 General Safety Information (VDC) Location Installation Considerations Safety Considerations Part 2 Installation 2.1 Receiving Your New Hydrogen Sulfide Analyzer 2.2 Mounting The Hydrogen Sulfide Analyzer 2.3.1 Electrical Connections (VAC) 2.3.2 Electrical Connections (VDC)
Page 3: Introduction
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 sulfide 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 sulfide analyzer. Principle of Operation - The Hydrogen Sulfide Sensor The precision electrochemical hydrogen sulfide sensor used in the H2S-625 is designed and manufac- tured under a strict quality procedure.
Page 4 H2S-625 H2S Analyzer Product Specification Sheet Hazardous Area Online Process Hydrogen Sulfide Analyzer w/ Sample System ATEX and IECEx Certified for Hazardous Areas Precision Electrochemical H2S Sensor Designed for Natural gas & Biogas Applications F.S. Ranges of 0 - 10 ppm up to 0 - 10000 ppm Cost Effective and Low Maintenance...
Page 5 H2S-625 H2S Analyzer Product Specifications H2S Analyzer: H2S Sensor Technology: The H2S sensor used in the H2S-625 is based on the galvanic The model H2S-625 Hydrogen Sulfide analyzer electrochemical fuel cell principal. All H2S sensors are manu- combines a rugged design with SSO2’s precision factured under a strict quality program. H2S sensors. The result is a highly reliable and cost...
Page 6 H2S-625 H2S Analyzer Product Certifications ATEX: Southland Sensing Ltd. 4045 E. Guasti Rd. Suite 203, Ontario, CA 91761 USA H2S-625 Series Hydrogen Sulfide (H2S) Analyzer ExVeritas 23ATEX1653X II 2 G Ex db ib IIB+H2 T4 Gb 2804 Tamb -20⁰C to +50⁰C IECEx: Southland Sensing Ltd.
Page 7 H2S-625 Hydrogen Sulfide Analyzer Introduction 1.4.1 General Safety & Installation (VAC) This section is for AC powered analyzers, if your analyzer is DC powered proceed to the next page. This section summarizes the precautions applicable to the H2S-625 Hydrogen Sulfide Analyzer. Ad- ditional precautions specific 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. This symbol is used throughout the owner’s manual to caution and alert CAUTION: the user that this device is operated on AC Voltage (VAC) This symbol is used throughout the owner’s manual to caution and alert CAUTION: the user to recommended safety and / or operating guidelines. This symbol is used throughout the owner’s manual to warn and alert the WARNING: user of the presence of electrostatic discharge.
Page 8 H2S-625 Hydrogen Sulfide Analyzer Introduction 1.4.2 General Safety & Installation (VDC) This section is for DC powered analyzers, if your analyzer is AC powered see the previous page. This section summarizes the precautions applicable to the H2S-625 Hydrogen Sulfide Analyzer. Ad- ditional precautions specific 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. This symbol is used throughout the owner’s manual to caution and alert CAUTION: the user that this device is operated on DC Voltage (VDC) This symbol is used throughout the owner’s manual to caution and alert CAUTION: the user to recommended safety and / or operating guidelines. This symbol is used throughout the owner’s manual to warn and alert the WARNING: user of the presence of electrostatic discharge.
Page 9: Location Installation Considerations
H2S-625 Hydrogen Sulfide Analyzer Introduction Location Installation Considerations 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 specific 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.
Page 10: Installation
H2S-625 Hydrogen Sulfide Analyzer Installation Receiving Your New Hydrogen Sulfide Analyzer As soon as you receive your new hydrogen sulfide analyzer carefully unpack the unit and accessories and inspect the interior and exterior of the analyzer for damage, and also verify the hydrogen sulfide 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 offers 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.
Page 11: Mounting The Hydrogen Sulfide Analyzer
Installation Mounting the Hydrogen Sulfide Analyzer The H2S-625 is designed to be mounted on a wall or around a pipe. See below for the mounting dimen- sions. If mounting in extreme temperature consider an enclosure and heater if necessary. Refer to Part 3: Operation section of this instruction manual for more information on how to operate the controls of this hydrogen sulfide analyzer.
Page 12: Electrical Connections (Vac)
H2S-625 Hydrogen Sulfide Analyzer Installation 2.3.1 Electrical Connections (VAC) This section is for AC powered analyzers, if your analyzer is DC powered proceed to the next page. Incoming power/signal output connections are made to the green terminal block located on the Back of the unit. Do not supply voltage more than specified in this manual and noted on the analyzer label inside of the unit. Shielded cable is recommended when connect- ing power and signal output. Voltage: 100 - 240 VAC...
Page 13: Electrical Connections (Vdc)
H2S-625 Hydrogen Sulfide Analyzer Installation 2.3.2 Electrical Connections (VDC) This section is for DC powered analyzers, if your analyzer is AC powered go to the previous page. Incoming power/signal output connections are made to the green terminal block located on the Back of the unit. Do not supply voltage more than specified in this manual and noted on the analyzer label inside of the unit. Shielded cable is recommended when connect- ing power and signal output. Voltage: 10 - 24 VDC...
Page 14: Earth Grounding The Analyzer
H2S-625 Hydrogen Sulfide Analyzer Installation 2.3.3 Earth Grounding The Analyzer Analyzer Ground Terminal Must Be Connected to Earth Ground. Conductor Size Must Be At Least The Size Of The Power Supply Input Wire. Analyzer Ground Terminal Must Be Ground Designed, Tested, and Assembled in California, USA...
Page 15: Gas Connections
Sample connections are designed for your process gas. Span connec- tions are designed for a certified bottle of calibration gas (required). Vent is the outlet, typically designed to vent to the atmosphere, a flare stack, or per your local regulations. Installing the H2S Sensor The H2S-625 can accept either an H2S-1x (200 ppm max), H2S-2x (2000 ppm max), or H2S-3x (10,000 ppm max) hydrogen sulfide sensor for trace H2S analysis. For help selecting a sensor, contact your local sales representative or the factory. Prior to installing the sensor, it is important to ensure that the gas lines are hooked up and the unit is ready to purge. Connect the process gas line and set your flow between 0.5 - 1.5 SCFH.
Page 16: Integral Sample System Flow Diagram
H2S-625 Hydrogen Sulfide Analyzer Installation Integral Sample System Flow Diagram Southland Sensing Ltd. strives to select the highest quality sample system components in the market. All gas connections are made via compression tube fittings. Our valves are high quality and leak tight which we rigorously test in our environmental chamber. Our flow indicators / flow meters are from Dwyer, an industry recognized leader in flow control When dealing with critical applications such as petrochemical processing and natural gas extraction, we want to make sure we can deliver a high quality sample system and we do so by partnering with some of the best brands in the market. Along with our standard sample system as shown below, we can also custom design sample systems to meet unique applications including the additional of moisture filters, pressure regulators, etc. For more information on a custom solution for your application, please contact your local distributor or the factory.
Page 17: Operation
H2S-625 Hydrogen Sulfide Analyzer Operation Understanding the Controls and their Operation The H2S-625 Hydrogen Sulfide Analyzer is a feature packed unit with an easy-to-use menu interface. The key attributes within the menu are the ability to select a measurement range manually or using the auto-range mode, to calibrate the unit with a known gas, also referred to as a SPAN Calibration or SPAN CAL, and to perform a zero calibration (if necessary, for most applications it is not required). All features are programmable / selectable through the MENU button. The UP / DOWN buttons will allow you to select your set points and the ENTER button saves the data. If you want to cancel your selection, or return to the previous screen the escape key ESC will allow you to do this. Once the unit starts up, the following home screen will appear:...
Page 18 H2S-625 Hydrogen Sulfide Analyzer Operation Measurement Range Overview The H2S-625 hydrogen sulfide analyzer allows the user to field select 4 available ranges - custom ranges can be programmed in the built-in menu, see Section 3.5. These ranges can be selected in manual mode, meaning they are locked into that range by the user, or they can be set to auto-range so the analyzer will adjust to give you the best full scale resolution. When using the Manual-Range mode the Manual Range locks the 4 - 20mA output to a single range, and the display will continue to operate in auto-range mode giving the user the full spectrum of analysis ranges. Other manufactures lock the display as well - the problem is if you over-range and...
Page 19 PLC, DCS prior to connecting the 4 - 20mA. The H2S-625 is equipped with a 4 - 20mA analog output. When physically connecting the analog output, refer to the circuit board pinout in section 2.3 To verify the signal output of the 4 - 20mA circuit is working properly, connect an ammeter across the (+) and (-) pins. With no hydrogen sulfide sensor connected, it should read approximately 4 mA. If a...
Page 20: Advanced Integral Alarms
H2S-625 Hydrogen Sulfide Analyzer Operation Advanced Integral Alarms The H2S-625 Hydrogen Sulfide Analyzer is equiped with 2 advanced relay contact alarms. These alarms can be configured as normally open or normally closed, have a delay mode built-in, and can be enabled or disabled when necessary. The alarms are rated at 5A @ 230VAC. If you are connecting to solenoid valves or a pump whose current can fluctuate greatly, it is adviseable to use a slave relay to ensure no damage occurs to the electronics. MAIN MENU The procedure for setting Alarm 1 and Alarm 2 is identical. To begin,...
Page 21: Setting A Custom Range
H2S-625 Hydrogen Sulfide Analyzer Operation Setting a Custom Range The H2S-625 Hydrogen Sulfide Analyzer can have a custom range programmed into it in case you need a specific non-standard range. Once you have set your custom range, you can select it in the Manual Range menu to lock the 4-20 mA output to that range. To set a custom range, perform the following steps: MAIN MENU AUTO RANGE MANUAL RANGE Press the MENU button to go into the onboard menu. Use the UP/ SPAN CAL DOWN buttons to scroll down to SYSTEM and press the ENTER button.
Page 22: Output Simulation
4 - 20mA. The H2S-625 allows the user to simulate an analog output to calibrate a PLC or DCS system. To ac- complish this, the H2S-625 will self generate a 4mA, 8mA, 12mA, 16mA or 20mA signal output.
Page 23: Maintenance
H2S-625 Hydrogen Sulfide Analyzer Maintenance Span Calibration using a Certified Span Gas Calibration involves using a known span gas to match and adjust the hydrogen sulfide sensor / analyzer combo to a known value. For this section, we will focus on using a certified span gas from your local air separation company. When using a certified bottle, it is recommended to get a span gas with 50 ppm H2S for the H2S-1x sensor, 100 ppm for the H2S-2x sensor, and 1000 ppm for the H2S-3x sensor. Contact your local supply company to see what may be available.
Page 24: Troubleshooting
H2S-625 Hydrogen Sulfide Analyzer Maintenance Procedure for Replacing the Hydrogen Sulfide Sensor The characteristics of a precision electrochemical fuel cell are similar to those of a battery. They both provide an output that is nearly constant throughout their useful life and simply fall of sharply to- wards zero at the end. With the H2S sensors you should get approximately 1 - 3 years of life depend-...
Page 25: Annexures
H2S-625 Hydrogen Sulfide Analyzer Annexures Spare Parts List Spare Parts List - H2S-625 Replacement Hydrogen Sulfide Sensors: H2S-1x PPM Hydrogen Sulfide Sensor, 200 PPM Max H2S-2x PPM Hydrogen Sulfide Sensor, 2000 PPM Max H2S-3x PPM Hydrogen Sulfide Sensor, 10000 PPM Max Replacement Parts: EX-PCB-10047-4 Circuit Board for H2S-625 Gen 2 EX-PCB-10041-2 Power Board, DC H2S-625 Gen 2 (4-Wire DC) EX-PCB-10041-3 Power Board, DC H2S-625 Gen 2 (4-Wire DC + Modbus) EX-PCB-10041-4 Power Board, DC H2S-625 Gen 2 (100 - 240VAC) EX-PCB-10041-5 Power Board, DC H2S-625 Gen 2 (100 - 240VAC + Modbus) EX-PCB-10049 MODBUS RTU RS485 Add On Board (Optional) ORING-1001 Sensor Housing O-ring FUSE-1001 Replacement Fuse H2S-625 For additional troubleshooting or replacement parts, please contact the factory: sales@sso2.com;...
Page 26: Warranty
Southland Sensing Ltd. reserves the right in its sole discretion to invalidate this warranty if the serial number does not appear. Limitations Southland Sensing Ltd. will not pay for: loss of time, inconvenience, loss of use, or property damage caused by the hydrogen sulfide analyzer / sensor or its failure to work.
Page 27 H2S-625 Hydrogen Sulfide Analyzer Annexures Material Safety Data Sheet (MSDS) Contact the factory for the MSDS. Designed, Tested, and Assembled in California, USA 4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : sales@sso2.com : www.sso2.com...
Page 28 H2S-625 Hydrogen Sulfide Analyzer Annexures Certificate of Conformance Model Number: H2S-625 Hydrogen Sulfide Analyzer Serial Number: ________________ Sensor Selection: ( ) H2S-1x Hydrogen Sulfide Sensor ( ) H2S-2x Hydrogen Sulfide Sensor ( ) H2S-3x Hydrogen Sulfide Sensor Serial Number: ________________ Sensor Housing Selection: H3 Flow Through Sensor Housing Sample System: ( ) Sample / Span valve, Flow Meter, 1/4” Compression Tube Fittings ( ) Sample / Span valve, Flow Meter, 6mm Compression Tube Fittings ) Delete Sample System; Fittings: _______________ Configuration: Ranges: 0 - 10 ppm, 0 - 50 ppm, 0 - 100 ppm, 0 - 200 ppm...
Page 29 H2S-625 Oxygen Analyzer Part 5 Annexures MODBUS RS485 RTU Bi-Directional Communication Protocol MODBUS RTU Protocol The H2S-625 uses MODBUS RTU at 19200 Baud, 8 bits of data, 1 stop bit, and Even Parity. The communication settings are not adjustable on the H2S-625. The MODBUS ID number is set as 1. MODBUS RTU structure looks like this: DEVICE ADDRESS 1 char ID = 1 FUNCTION CODE 2 chars REGISTER NUMBER 2 chars REGISTER COUNT n chars Data + length, depends on message length DATA n chars, depends on message length...
Page 30 H2S-625 Oxygen Analyzer Part 5 Annexures 5.5_2 MODBUS RS485 RTU Bi-Directional Communication Protocol MODBUS RTU Protocol Gas concentration when read from or when written to the H2S-625 is in PPM, as XX XX XX.XX, ie. 22.7 Percent Oxygen on the display would be 227,194.82 and would appear as 22719482. Command 4 is for reading input registers, we use this when reading gas concentration. This will re- turn the gas concentration in PPM, regardless of the manual range setting. The MODBUS command...
Page 31 H2S-625 Oxygen Analyzer Part 5 Annexures 5.5_3 MODBUS RS485 RTU Bi-Directional Communication Protocol MODBUS RTU Protocol Command 4 will return the gas concentration, the following example is for MODBUS ID #1, and is returning 22.7 Percent or 227,194.82 PPM, “ 01 01 5A A5 A6 21 41 ”. In this instance 01 5A A5 A6 Hex = 22717862 Decimal, or 227,194.82 PPM “01” Device ID, “04” Function – Read Input Registers, “04” Byte Count – Always 4 bytes “01”, Data Byte Hi, #1 “5A”, Data Byte Lo, #1 “A5”, Data Byte Hi, #2...
Page 32: Explosion Proof Electrical Connections
H2S-625 Hydrogen Sulfide Analyzer Installation Explosion Proof Electrical Connections Electrical connections require an approved explosion proof cable gland / conduit sealing fitting and packing around wires and cables (for incoming power for the analyzer electronics and analyzer out- puts) coming into and out of the explosion proof enclosure that houses the power supply. Full compliance with hazardous area electrical code requires the user to supply cable gland, fittings and /or conduit commensurate with the level of protection or classification desired. To maintain the ATEX / IECEx / UKEX certification of this unit, the user must install ATEX / IECEx / UKEX approved components according to the published directives. Additional Specific Requirements: 1.) Only cable glands and conduit sealing fittings certified for protection type ‘d’ and have an IP66 rating may be used.
Page 33 H2S-625 Oxygen Analyzer Part 5 Annexures Potential Electrostatic Charging Hazard Static electricity is the electrical charge produced on two dissimilar materials through physical con- tact and separation caused by the imbalance of positive and negative charges between the two. As an electrostatic charge accumulates, the electric fields and voltages increase. If the charge is unable to bleed off to ground when the electric field exceeds the insulating properties of the atmos- phere, a static discharge hazard can occur.