User Manual - Envent Engineering
Contents
1. eese 22 Modbus RESIS Y RC es 24 Recommended Spare Parts Last rater ettet to toe ipe ted dede edd eee e Op aerea epa sp E aienea 25 H2S Concentration Conversion Factors eese nnne nen nennen nnne 25 SUD ASSEMbLIES TEM 26 Standard System Drawings retener rp tip regi e pe ter eH HER Er prete I ORE es base E aeree ipe relie ean 27 Recommended Venting ia err RP ere e E e ee RUE Ure epe i pe teg eH EIER Ee rape RE aegre 28 Controller Board Sehematc inn aupvnmuneiridperb radere rodar ees ege ERE Pea Eee xe s sera puluis pee 30 Chico A Sealing Compound erri igi e e ne EH HE Cer rg t I RR ee POE E eaoaai 31 Optional Low Pressure Switch eese inpr e tret peteret peres bet Praest ipn iode seus 32 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 A Figures and Tables A 1 Figures Figure 1 330 amp 331 Analyzer Principle of Operation Diagram sernnvnrnrnvnrnvvrnvvnrnvnrnvnrnrernenrnrernrnvvervrnsvrnrnreee 6 Figure 2 Sample Chamber and Parts sese eene een enne nnne nette nnen nnne I Figure 3 Eductor Block Information Diagram sees nennen rennen nennen nenne 8 Figure 4 330 Standard Operator Interface similar to 331 sese 9 Figure 5 331 RS 232 Communication Connection essere rennen nnne nnen rennes 10 Figure 6 330 DIN Receptable Commu2. FOR APPLICATIONS INVOLVING GROUPS C AND D NCAUTION Sealing compound to be mixed ONLY at temperatures above 35 F 2 C and ONLY poured into fittings that have been brought to a temperature above 35 F 2 C Seals must NOT be exposed to temperatures below 35 F 2 C for at least 8 hours FOR GROUP B APPLICATIONS NCAUTION Sealing compound to be mixed ONLY at temperatures above 40 F 4 4 C and ONLY poured into fittings that have been brought to a temperature above 40 F 4 4 C Seals must NOT be exposed to temperatures below 40 F 4 4 C for at least 72 hours KEEP compound dry by having container cover tightly closed when not in use NOTE For additional details see IF 287 packed with sealing fitting Figure 20 Chico A Sealing Compound 3l Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 Optional Low Pressure Switch When there is low or no gas pressure entering the analyzer the pressure switch triggers the analyzer to alarm The pressure switch has been set at the factory to 10psi on the descending side therefore the analyzer will go into alarm when the pressure of the gas decreases to 10psi or below The figure shown below shows how the pressure switch is wired to the analyzer Piease note that there is a fail safe when connecting the normally open wire NO rather than the normally closed wire NC the analyzer will also go into alarm if there is a problem wi
3. sess nre rem nennen nne unenian 31 Figure 21 Optional Low Pressure Switch nennen nem een enne rennen 32 A 2 Tables Table 1 Technical Specifications eerte eret sda DEEP p t t Eee bee ote EP Peer tabe ehe el edd 5 Table 2 Range amp Aperture Information sese een rennen nnennrenenenere tette reete 7 Table 3 Analyzer Display Button Functions soornvrnnrnnrrvnrrvvorvvnnnvnrnvnrnvnrnrernreevanevnrnensnrervasevarvesneesnresnsesvreee 9 Table 4 Sample Lag Time vs Tubing Size sessi rennen nennen rennen 11 Table 5 Customer Connection Summary eese nennen nennen een nennen nren rennen 14 Table 6 Troubleshooting Recommendations nennen ren nen nennen rennen 21 Table 7 Default Modbus Registry List 0 0 cee eeseeesceeeseessseeeeseeceseeceseecsaeeceaeeceaeecsaeecsaceceaeeceaeeseeeseneeseneeeeaes 24 Table 8 Recommended Spare Parts List for 2 Years msenrrnrnrnrnrnrvrrvvrrvvnrvvnrnvnrnerenervvervrnrvrervrerreevrrsvarsvene 25 Table 9 H2S Concentration Conversion Factors rrnnnrnrnnnrnvvrnvvnnnvnnnvnrnvnrnrnrvarevnsvvnsnvnsnrernrevnasvvesensnresnresnsee 25 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 B Introduction The Envent Engineering Ltd model 330 amp 331 hydrogen sulfide analyzers can be configured via software and hardware to measure a wide range of hydrogen sulfide concentrations in gases as well as in liquids
4. Vent should be 3 8 or larger tubing on a downward slope Possible heat trace required d Liquid carry over in sample conditioning system Sample conditioning system requires cleaning Refer to Cleaning procedures e Regulator not maintaining 15 psig Pre regulation to 50 psig of sample at sample point Possible regulator requires repair or replacement of Hydrocarbon liquid carried over through the sample regulator Heated regulator may be required f Analog Input 2 jumper removed Re install jumper in Analog Input across 4 20 amp 4 20 g Sensor block fault Re zero Sensor block Refer to Sensor Re zero procedure Check for green status led on sensor block h Contaminants in sample chamber Clean sample chamber Replace aperture and window if required Clear grease from window Envent no longer uses grease on the chamber window Applies to earlier H2S analyzers i Contaminants in sample conditioning system Sample conditioning system requires cleaning Refer to Cleaning procedures on page Tape does not advance a No tension on take up reel Check setscrew in take up reel collars Check to see if manual advance is possible on tape Continued on next page 21 Envent Engineering Ltd Problem Tape breaking Possible reasons a High liquid content in sample gas 330 amp 331 Operator s Manual Last Updated 6 May 14 Possible Solution Genie
5. C amp D e The 331 is designed for Class I Division 2 Groups A B C amp D CAUTION Analyzer may utilize an optional CCS Model 646 Series pressure switch located on the side of the electrical enclosure e Dual Seal MWP 500PSI e Annunciation is Visible Leakage from the pressure adjustment cover flow from this cover can indicate the possibility that a failed primary seal condition could exist in the pressure switch CAUTION 330 Seals Not Poured Pour seals before energizing the circuit see APPENDIX on page 32 for further details CAUTION Disassembly of the pressure regulator and solenoids in the field is not advised Consult the factory if the regulator or solenoid appears contaminated CAUTION Before resuming line pressure be sure that all port connections sample sweep and sample conditioning system are securely installed CAUTION All connections must be LEAKTIGHT to ensure the effectiveness of the analyzer as well as SAFETY The user through his own analysis and testing is solely responsible for the product selection safety and warning requirements for the application If the equipment is used in a manner not specified by Envent Engineering Ltd the protection provided by the equipment may be impaired CAUTION Do not use solvents brake cleaner soaps or detergents CAUTION Turn off power before servicing Ensure breakers are off before connecting or disconnecting supply power CAUTION This unit may require a disc
6. APPENDICES 330 amp 331 Operator s Manual Last Updated 6 May 14 Modbus Registry Please note that due to differences in PLCs these registries may be shifted by one value Note that these can be modified if necessary Table 7 Default Modbus Registry list MODICON 32 bit Enron Protocol Coils standard protocol Discrete Output 1 Solenoid 1 0000 1001 Discrete Output 2 Solenoid 2 0001 1002 Discrete Output 3 Solenoid 3 0002 1003 Discrete Output 4 Solenoid 4 0003 1004 Discrete Output 5 Relay 1 0004 1005 Discrete Output 6 Relay 2 0005 1006 Discrete Output 7 Relay 3 0006 1007 Discrete Output 8 Relay 4 0007 1008 Virtual Output 1 DI 1 Low Tape 0008 1009 Virtual Output 2 Sensor Low 0009 1010 Virtual Output 3 Sensor High 0010 1011 Virtual Output 4 Low Temp 0011 1012 MODICON 32 bit Enron Protocol Floating Point standard protocol Process Stream 1 H2S 40001 7001 Process Stream 2 H2S 40002 7002 Analog Input Current 1 raw mV 40003 7003 Analog Input Current 2 CO or F 40004 7004 RRA Current Value H2S 40005 7005 Board Temperature C 40006 7006 24 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 Recommended Spare Parts List Table 8 Recommended spare parts list for 2 years Part Number Qty Description 330063 350079 330103 330130 330133 850406 7 330423 330431 3
7. adjustment is required continue to step 9 9 Press the Menu Set button until the gain setting is displayed Gain 10 Calculate the new gain New gain value should be within approximately 25 of the gain installed at the factory Cal Gas Concentration X Current Gain New Gain Current Reading 18 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 11 12 13 14 15 16 17 18 19 F 2 1 10 11 12 To adjust the gain setting such that the analyzer displays the correct H2S concentration press the right and or left lt arrows until the cursor is underneath the number you wish to change Adjust the number using the Menu Set button it will increase until 9 then will cycle back through 0 Save the new gain value by pressing the right arrow until Saved appears or discard by pressing the left arrow until Cancel appears Allow the analyzer to complete two cycles using the new gain value The H2S reading should match the calibration gas concentration Repeat step 10 if necessary Return to sample gas flow using the 3 way calibration valve Set the sample gas pressure to 15 psig and set the flow meter to 2 0 Disconnect the calibration gas supply After waiting 10 to 15 minutes confirm the analyzer reads below the H2S alarm set points Remove the analyzer from bypass mode by pressing the bypass button Verify t
8. into each conduit hub behind the conductors 3 Push the conductors backward and force them apart 4 Pack fiber between and around the conductors in each conduit hub It is important that the conductors be permanently separated from each other so that the sealing compound will surround each conductor 5 Pack fiber into each conduit hub in front of the conductors A CAUTION Do not leave shreds of fiber clinging to side walls of sealing chamber or to the conductors Such shreds when imbedded in the compound may form leakage channels The completed dam should be even with the conduit stop 6 If the Condulet is of a type or size that has a separate work opening this should be closed by its cover before pouring the seal COMPOUND Follow these instructions carefully Use a CLEAN mixing vessel for every batch Particles of previous 330 amp 331 Operator s Manual Last Updated 6 May 14 batches or dirt may spoil the seal The recommended proportions are by VOLUME 2 parts of Chico A compound to 1 part of clean water Do not mix more than can be poured in 15 minutes after water is added Use cold water Warm water increases speed of set ting Stir immediately and thoroughly A CAUTION If a batch has started to set do not attempt to thin it by adding water or by stirring Such a procedure may spoil the seal Discard partially set material and make up fresh batch After pouring immediately close the pouring opening
9. probe and additional filtration may be required b Feed wheel not spinning freely Dust and refuse build up between feed wheel and chassis Requires removal and cleaning of chassis c Tape cover wheels pressing against tape Tape cover wheel became warped Needs to be flattened to not contact tape when on feed wheel bolt d Trigger slide not seated properly Ensure trigger slide is seated in groove of sample chamber Slow Response a Aperture in chamber not optimized for range Removal or change of aperture type required Contact Envent tech support for ideal setting b Liquid contamination in sample tubing Sample conditioning system requires cleaning Refer to Cleaning procedures c Sensor block in fault Re zero Sensor block Refer to Sensor Re zero procedure Higher or Lower than expecting a Liquid contamination in sample tubing Sample conditioning system requires cleaning Refer to Cleaning procedures feading b Sample vent either blocked or Vent should be 3 8 or larger 316 stainless steel tubing on a frozen downward slope Possible heat trace required c Contaminants in sample chamber Sample conditioning system requires cleaning Refer to cleaning procedures Fault light a Sensor Low fault Re zero Sensor block Refer to Sensor Re zero procedure indicated b Sensor High fault Re zero Sensor block Refer to sensor re zero procedure c Low Tape Sensing
10. tape requires change Possible low tape sensor failure d Low Pressure Pressure on outlet of regulator is lower than set point of pressure switch factory set to 10 psi Sensor Fault a Sensor didn t zero on white tape Re zero Sensor block Refer to Sensor Re zero procedure b Sensor Wire failure Wire or Sensor requires replacement G 3 Sample Conditioning System Cleaning Procedure A CAUTION Do not use solvents brake cleaner soaps or detergents During startup or plant upset situations the hydrogen sulfide analyzer may become contaminated with amine or hydrogen sulfide scavenger solution This may cause the analyzer to read low this can be determined at calibration If the analyzer reads low it will require incremental increases in the gain to maintain calibration Please refer to factory calibration sheet for factory set gain factor The scavenger solution is water soluble and therefore is relatively easy to clean 22 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 Material List Cleaning kit part number 330900 e Alconox Laboratory cleaner or equivalent residue free cleaning agent Do not use solvents detergents or soaps Fresh water 100 Isopropyl Alcohol Do not use rubbing alcohol Do not use brake cleaner product e Large bucket to mix cleaning solution Rinse bottle Procedure Step 1 Mix a 1 2 1 2 tbsp per gallon of Alconox in warm wa
11. 30900 330424 Furnace Element total sulfur option only H2S Concentration Conversion Factors Table 9 H2S Concentration conversion factors Original Unit Multiply By Final Unit mg m 0 698 ppm ppm 0 0626 grain 100 cf 96 10 000 ppm Mole kMole 1000 ppm 23 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 Sub Assemblies EE e a 1 330028 HE PUE E J FEED WHEEL SHAFT 3 330024 TAKE UP BEARING BLOCK 330028 COUPLING 1 4 EXPLOSION PROOF 8 ASSEMBLY SE 0 MOTOR MOUNTING BRACKET XP HE vater OT Figure 13 330 Motor box assembly exploded Description Part number 1 Trigger Slide 330042 2 Sample Chamber 330075 8 Senosr block clips 330074 4 Sensorblock X 330230 Figure 14 Sensor chamber assembly exploded 26 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 Standard System Drawings I 24 00 SAMPLE INLET MAX 3000 PSIG 1 4 SWAGELOCK TUBE ELECTRICAL CONNECTIONS SAMPLE SWEEP 1 4 SWAGELOCK TUBE Fitting modified with vent hole CALIBRATION INLET S
12. AMPLE VENT SAMPLE EDUCTOR 1 8 SWAGELOCK TUBE 3 8 SWAGELOCK NOTE leave this port open to atmosphere TUBE Figure 15 331 Standard system drawing r 24 00 a SAMPLE INLET 1 4 SWAGELOCK TUBE SAMPLE VENT 3 8 SWAGELOCK TUBE SAMPLE SWEEP sal 1 4 SWAGELOCK TUBE 32 00 Q a i C N CALIBRATION INLET DO B 1 8 SWAGELOCK TUBE p 1 2 NPT 3 4 NPT VES REN 3 4 NPT h d B 1 2 NPT i i ELECTRICAL E E CONNECTIONS z z Figure 16 330 Standard system drawing 27 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 Recommended Venting BUILDING WALL TO SAMPLE CONNECTION POINT 1 4 SWAGELOCK n ud Zu ug a gt m iz DERE SAMPLE SWEEP SAMPLE VENT 3 8 SWAGELOCK TUBE USE ONLY SS TUBING AND FITTINGS SLIGHT DOWNWARD SLOPE AS SHORT AS PRACTICAL il EIE BUILDING WALL cl et SN 38V 14 OL LOANNOD LON OG TUNSSIUdDVE ON ATddv Figure 17 330 Recommended venting Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 BUILDING WALL 1 8 SWAGELOCK TUBE CALIBRATION INLET O SAMPLE EDUCTOR SAMPLE VENT 3 8 SWAGELOCK SLIGHT DOWNWARD SLOPE AS SHORT AS PRACTICAL USE ONLY SS TUBING AND FITTINGS BUILDING WALL de et T OUTDOORS APPLY NO BACKPRESSURE DO NOT CONNECT TO FLARE Figure 18 331 Recommended venting 29 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 Controller B
13. ASS Figure 12 331 Tape change procedure similar to 330 20 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 G Maintenance amp Troubleshooting G 1 Monthly Checkup Your analyzer will provide reliable service with very little attention If the analyzer is kept clean there should be no requirement to recalibrate from factory gain settings However regular check up will ensure that the analyzer is operating to specifications e Ensure that the tape take up and feed reels are tight G 2 e Ensure that the flow meters humidifier tubing and sample chamber tubing are free of liquid or particulate contamination e Check that the sample conditioning filters every tape change or when sample conditioning system is saturated with liquid Replace the inlet filter as required Troubleshooting For other possible solutions please visit the Frequently Asked Questions section of our website at www envent eng com H2SFAQ php Problem Erratic HS Readings Table 6 Troubleshooting recommendations Possible reasons a Trigger slide not seated properly Possible Solution Ensure trigger slide is seated in the groove of the sample chamber b Pressure in building moving up and down from fan exhaust or wind Eductor may be plugged or vent blocked Check that all vent tubing and fittings are 316 stainless steel sized 3 8 or larger c Sample vent either blocked or frozen
14. Description Function Bypass Used to inhibit all analyzer alarms to a non alarm state and sets the analog 4 20 mA output to 2 mA The Bypass LED illuminates when Bypass mode is enabled Scroll Right Used to move the cursor to the right Also used to SAVE configuration adjustments Scroll Left Used to move the cursor to the left Also used to CANCEL configuration adjustments Menu Set Used to cycle through the menu options Also used to increase numerical values when making configuration adjustments Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 Computer Software The software for the 330 amp 331 allows the user to change the factory configuration The software is available at the Envent website www envent eng com Contact our technical support department for assistance A separate software manual is included in the USB provided when purchasing the Analyzer In order to communicate with a 331 analyzer plug into the RS 232 port located just above the mainboard SERIAL PORTS RS 485 RS 232 RS 232 communications connection Figure 5 331 RS 232 Communication connection In order to communicate with a 330 plug into the DIN receptacle located just behind the window Figure 6 330 DIN Receptable communication connection 10 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 D Installation and Start up Yo
15. Model 330 amp 331 Hydrogen Sulfide Analyzers Operator s Manual Last Updated May 6 2014 Revision 3 Envent Engineering Ltd Envent Engineering Ltd 7060 Bay E Farrell Road S E Calgary Alberta Canada T2H 0T2 Tel 403 253 4012 Fax 403 253 4016 Email info 2 envent eng com Web www envent eng com For further information or a copy of our most recent operating manual please visit us at www envent eng com Envent Engineering Ltd reserves the right to change product design and specifications at any time without prior notice All products carry a one year limited warranty from the date of start up or 18 months from date of shipment whichever occurs first F O B the factory against defective parts or workmanship Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 TABLE OF CONTENTS Ay Bipures and Tales S V All SUES e NE 2 A2 jb Me EE 2 MM i TUM B 1 Warnings and Cautions iieri etre tetto eot ert vocavaesedeadeesvonevepesbenivessdendiebessatervebdetiees 4 B 2 Technical Specifications 2 rtr retro sobs dues is yr ER berto repe triv 5 EV XoEF DD H C 1 ductor Vent Assembly etr erm ed rete RERO Ee eR 8 C Oper tor Interface E 8 Computer SoftWare tasaisissa M 10 D Inst
16. With the addition of a hydrogen reaction furnace the analyzer is also capable of total sulfur measurement This manual describes the operation of the hydrogen sulfide analyzer Additional sections will describe the operation of any optional equipment This manual contains a comprehensive overview of Envent Engineering s 330 amp 331 H2S analyzer and step by step instructions on e Installation and Start up e Operation e Maintenance e Troubleshooting This manual should be read and referenced by the person who will install operate or have contact with the 330 and or 331 Take time to familiarize yourself with the content of this Operator s Manual reading each section carefully so you can quickly and easily install and operate the analyzer The manual includes images tables and charts that provide a visual understanding of the analyzer and its functions Take note of all the caution symbols and notes as they will alert you of potential hazards and important information gt o gt PBPPPPPPPPP Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 B 1 Warnings and Cautions CAUTION The analyzer should be mounted in an area in which it is not exposed to vibration excessive pressure temperature and or environmental variations CAUTION Ensure that the analyzer received is suitable for the electrical classification of the installation site e The 330 is designed for Class I Division I Groups B
17. allation and Start opsuasmmnasesanbnsnmeemdt insrvmnsnmsmsestsasse LL D 1 Sample Point Selection ii er m tienen Ex ie ia egeta ete Ue gp rete Er c Po eR Penn 11 D Sample Volume and Flow Rate essere nennen eene rennen nen enne 11 D 2 1 Sample Lag Time vs Tubing Size sess eene nemen 11 D 3 Sample Conditoin g sssi 12 D 4 Installation Procedure iia ie tte O OS E R gis 13 E Customer Connecliolisaieseeszi vissisrese rea rp ei n papi ga aeeae eet useedede isdans E rete stis RO E 1 Relay Outputs and Solenoid Drivers sees nennen rennen 15 E 2 Furiae 16 E 2 1 Optional Powered AO Board for Loop Power esee 17 F Calibration 18 F 1 Calibration amp Alarms uie ter REIR N E TER GS SEES TREE AM RREER NUR EVER ed antares 18 F2 Calibration Procedure X E desdaeiede 18 EZ Re Zero Sensor Proced tre esee annee etn es ian ane E Sale RT E peer e s PNE Mure RRE e ERN U EE 19 F2 2 Tape Change Procedure eere ertt ter E ra eH EL ENEE RNE e EE UM HOAN 20 G Maintenance amp Troubleshooting eee e ceres eee eee eee eee eee eese es seeeessssesess 2L G 1 Monthly Checkup RIEN SPUR CERERI EIS EE E EES 21 G 2 Troubleshodtns Lurtderldraerede Rea See 21 G 3 Sample Conditioning System Cleaning Procedure
18. anual Analyzer settings can be read and adjusted using the operator interface display F 2 Calibration Procedure 1 Source a calibration gas of H2S in balance of N2 regulated to 15 psi check expiry date H2S concentration to be approximately 2 3 of full scale range or close to the H2S alarm set point 2 Press the bypass button and verify the Bypass LED illuminates alarms will be held in the non alarm state 3 Turn off all gas supplies to the analyzer and check that a sufficient amount of sensing tape is installed 4 Press the Menu Set button until Mtr Run is displayed Press the right arrow the H2S sensing tape will advance for approximately 10 seconds 5 Press the Menu Set button until mV is displayed mV If the mV reading is 1000 100mV proceed to the next step otherwise re zero sensor Refer to section F 2 1 Start at step 4 6 Connect calibration gas to calibration port and turn 3 way calibration valve 180 The valve handle should be pointing towards where the gas bottle tubing is connected to 7 Turn on sample inlet valve ensure that the sample regulator is supplying 15psig to the eductor make sure there is suction from the eductor block Adjust the flow meter to 2 0 Wait until the H2S reading has stabilized 10 to 15 minutes 8 With calibration gas applied if H2S reading is satisfactory 2 of analyzer full range skip to step 16 if H2S reading is not satisfactory a gain
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20. ections sample sweep and sample conditioning system are securely installed Step 11 Turn on sample gas flow open sample inlet valve Step 12 Open the sweep valve slightly and adjust pressure regulator to 15 psig and the flowmeter to 2 0 CAUTION All connections must be LEAKTIGHT to insure the effectiveness of the analyzer as well as SAFETY The user through his own analysis and testing is solely responsible for A the product selection safety and warning requirements for the application If the equipment is used in a manner not specified by Envent Engineering Ltd the protection provided by the equipment may be impaired Allow twenty minutes for the analyzer to stabilize The analyzer calibration can be verified if calibration gas is available refer to the calibration section If no calibration gas is available the analyzer may be operated using the factory calibration settings until calibration gas is available 13 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 E Customer Connections CAUTION This unit requires a disconnect device rated 24 VDC and 5A max must be protected by a circuit breaker rated 24 VDC and 5A max and it is to be installed in accordance with local electrical codes CAUTION Turn off power before servicing Ensure breakers are off before connecting or disconnecting supply power All customer connections are indicated on the circuit board refer to figure 6 For a larg
21. er view and detailed information on the controller board please see Appendix Controller Board Schematic Note if you have unreliable power consider using a backup battery or an uninterrupted power source FURNACE n4 LJ ea an ae Lu e 2 re Figure 8 Controller Board Layout amp Power Input Note Spare fuse F3 included if total sulfur not installed Table 5 Customer connection summary see Figure above application Positive Negative Neutral Ground AC L H L N FG hot neutral DC L H L N NA 14 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 Ed Relay Outputs and Solenoid Drivers Four relays and four solenoid drivers are supplied on the 330 331 controller board The relays are used as status outputs to drive external relays or solenoids The solenoid drivers are used for external loads DO NOT supply external power to solenoid drivers The four solenoid drivers are provided to directly drive solenoids for shutdown auto calibration or stream switching SSRI S R2 SBR8 S5D4 LLELLEELELLLL Fri 2 3 4 E 85 7 910 1112 T US 4 o8 EE DEEP LY 1 RLY 2 REV 3 RLY 4 NOCOMNC NOCOMNC NOCOMNC NOCOMNC Sl 5l 82 92 53 53 S4 StF F1 RELAY OUTPUTS SOLENOID DRIVERS Figure 9 Relay outputs and solenoid drivers 15 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 E 2 Analog Outputs Two isolated analog out
22. ff power before servicing Ensure breakers are off before connecting or VAN disconnecting supply power CAUTION 330 Seals Not Poured Pour seals before energizing the circuit see APPENDIX on page 32 Step 7 Tube the sample inlet sample sweep and sample vent lines to the analyzer e 1 4 316 stainless steel tubing is recommended for the sample tubing e 1 8 316 stainless steel tubing can also be used if the response time of the analyzer is of particular concern All fittings in the sample and vent lines must be 316 stainless steel The vent line should be tubed with 3 8 stainless steel tubing to a maximum of 6 feet in length e 1 2 316 stainless steel tubing should be used for vent lines exceeding 6 e The tubing should be installed with a slight downward slope and should be as short as possible e The sample vent line must be tubed to atmospheric pressure outside and cannot be connected to a flare line or heater Note For recommended venting see Appendix Recommended Venting Step 8 Ensure there is enough H2S sensing tape Step 9 Ensure there is enough 5 acetic acid if the analyzer has a humidifier Step 10 With the sample pressure turned off sample inlet valve closed e Apply power to the analyzer The display will illuminate and the sensing tape will advance e Press the menu button until mV is displayed Check that the mV reading is 1000 mV 100 mV AN CAUTION Before resuming line pressure be sure that all port conn
23. he Bypass LED turns off Caution alarms are armed Re Zero Sensor Procedure Press the bypass button and verify that the Bypass LED illuminates Turn off sample gas flow using sample inlet valve Press the Menu Set button until Mtr Run is displayed Press the right arrow the H2S sensing tape will advance for approximately 10 seconds Remove the sensor cover Press the small pushbutton on the sensor block located on the lower left side next to the wire connector e The sensor block will implement a re zero procedure indicated by a lit red LED e When the re zero procedure is complete the LED light will turn green Initiate another motor run Step 3 Press the Menu Set button until mV is displayed e Value should be between 900 amp 1100 mV Put on sensor cover Turn on sample gas flow using sample inlet valve Set the gas pressure to 15 psig and the flow meter to 2 0 Confirm the analyzer reads below the H2S alarm set points Remove the analyzer from bypass mode by pressing the bypass button Verify the Bypass LED turns off Caution alarms are armed 19 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 F 2 2 Tape Change Procedure STEP 1 Place analyzer into BYPASS STEP 3 Remove amp discard used tape STEP 2 Remove reels covers STEP 4 Install new tape STEP 5 Re attach reel covers STEP 6 Initiate a MTR Run STEP 7 Take analyzer out of BYP
24. nication Connection essent 10 Figure 7 331 amp 330 Flow DIAgrati iet rtr iretur SERE qe AEE R ea ERE HERR RR ie AEKA KEE RERE 12 Figure 8 Controller Board Layout amp Power Input esee nennen 14 Figure 9 Relay Outputs and Solenoid Drivers sess een eene nennen 15 Figure 10 4 20 mA Output Wiring Options eeeseeseeseeeseeeeeeeeeee nennen nennen trennen nre 16 Figure 11 Powered 4 20 mA Option sssssesseseeseeeseeeeeneeeen eene eene ret eretre tenete trennen ie enne 17 Figure 12 331 Tape Change Procedure similar to 330 essere 20 Figure 13 330 Motor Box Assembly exploded sees 26 Figure 14 Sensor Chamber Assembly exploded essere 26 Figure 15 331 Standard System Drawing eeovrrnorvnorrnorrvvenvvenvnvvrnevrnvnnnvnnevnnennnennnevnnevnnevnsennsennvernvvansvasvvnsvnse 27 Figure 16 330 Standard System Drawing sesesessesseeseeseeeeeee nennen enne eren rem nennen nne nren rennes 27 Figure 17 330 Recommended Venting ederent terit e etg tr rb Fir epe bo eee Eee pa dre raus in 28 Figure 18 331 Recommended Venting ssssssssssseeseeeeeeee eene nnnm eren nen nen enne 20 Figure 19 Controller Board Schematic rsornvnnnvnrnenvnrnvvrnnvnnnvnrnrnrnrernrnvnnnnvnsnverneernenenerevervvnsnrnsvrnsnrnevarvassveee 30 Figure 20 Chico A Sealing Compound
25. oard Schematic The controller board mainboard is used in both the 331 and 330 models Note that the power supply shown here is for DC applications but directly applies to AC O8 078 dAv 3 sena siszaoww O Nn N 3 O18 O18 dAv S 3nd N3AO H 4 94 STEPPER MOTOR LI Power Input POWER SUPPLY SRInuvelidW3l NJAO QION308 QION310S delak LLL 81 Si 52 82 S3 53 84 S4F1 Fi Solenoid amp Furnace Outputs z x FI 1 2 545 8 7 8 9 10 Ad lj 7 RS 485 RS 232 83 T SERIAL PORTS no o RLY 2 RLY 3 RLY 4 NOCORNC NO COMNC NO GONNC NOCOMNG Relay Dutputs LU ELI ki ac je RLY 1 LILL TE 8 l ANALOG INPUTS id Ri I DIG Analog Outputs E Ld A j im DI 1 DI 1 DI 2 DI 2 m DI 3 DI 3 DI 4 N DI 4 os Display Board ENVENT ENGINEERING Brita ippute H2S ANALYZER CONTROLLER REV 1c Figure 19 Controller board schematic 30 Envent Engineering Ltd Chico A Sealing Compound For Sealing Fittings in Hazardous Locations Installation amp Maintenance Information INSTALLATION DAM Using Chico X Fiber make a dam in each conduit hub except the one extending upward so that the Chico A sealing compound while fluid cannot leak out of the sealing chamber Use the EYS TOOL KIT to pack a proper fiber dam do not use metal tools Proceed as follows 1 Force the conductors forward 2 Pack fiber
26. ofitted to existing analyzes Gas from Analyzer Sample Vent Eductor Jj Vent to Atmosphere Atmosphere Vacuum Suction Normal DO NOT Restrict Figure 3 Eductor block information diagram C 2 Operator Interface The 330 331 Analyzer can be configured by using the display button function or by connecting the analyzer to a computer through RS 232 or RS 485 Note The Envent Software for 330 331 is required to interface with the Analyzer It can be downloaded from our website at www envent eng com Display By using the display on the Analyzer the user can only view and or change certain parameters set at the factory The display is made up of a 2 line LCD and four push buttons the Top one used for Bypass the Right and Left used to move the cursor and the bottom one to cycle though the display Please refer to Table 3 for further details 8 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 CAUTION The glass window on the model 330 must remain installed in order to maintain 2 area classification To configure the 330 use the magnetic wand from outside the enclosure window If the area is non hazardous the window can be removed if preferred in order to press the internal buttons directly Bypass ecee Bypass Alm 1 Alm 2 Fault Figure 4 330 standard operator interface similar to 331 Table 3 Analyzer display button functions Button
27. onnect device rated 24 VDC and 5A max must be protected by a circuit breaker rated 24 VDC and 5A max and it is to be installed in accordance with local electrical codes CAUTION This unit may require a disconnect device rated 240 VAC and 5A max must be protected by a circuit breaker rated 240 VAC and 5A max and it is to be installed in accordance with local electrical codes CAUTION The eductor is required with model 331 in order to maintain electrical safety and certification in Division 2 Areas CAUTION The glass window on the model 330 must remain installed in order to maintain area classification Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 B 2 Technical Specifications Table 1 Technical Specifications eod method Sulfide in Gaseous Fuels Lead Acetate Reaction Rate Method Ambient 0 50 C standard consult factory for other requirements 0 to 90 Temperature humidity non condensing Or 100 240 VAC 50 60 Hz 5W 500W when total sulfur option is included Electrical Certification Display 2 x l6 character LCD with back lighting menu is scrolled by internal button or magnetic wand 330 Outputs Two 4 20mA outputs loop power required optional 4 20mA powered Serial 1 RS 232 Modbus protocol 1 RS 485 Modbus protocol Two additional serial ports plus Ethernet as an option 4 SPDT relays 120 VAC 5A maximum 4 solid state solenoid drivers Optional Equipment Total Sulfu
28. pe creating the brown stain Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 Gas Flow Window oe ids Aperture Strip z rom numiditier Sensor block clips Trigger Slide Sensor Block Sample Outlet T To ELO Sensor Board Figure 2 Sample chamber and parts For concentration applications over 10 ppm there may be a restricting aperture behind the window Various sizes of apertures match different measurement ranges See the table below Table 2 Range amp Aperture Information Aperture Range Size PN 100 ppb 10 ppm Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 C 1 Eductor Vent Assembly A CAUTION The eductor is required with model 331 in order to maintain electrical safety and certification in Division 2 Areas The analyzer reading can be affected by positive or negative pressure on the sample vent line This can be caused by strong winds blowing across or directly into the vent or by mechanical venting exhaust fan The eductor will eliminate any influence on the analyzer reading optional for 330 In cold climates since the analyzer is venting a moist sample freezing can occur The eductor will help prevent freezing problems in the vent line due to the increased velocity and drying effect of the sweep gas The eductor vent can also be retr
29. puts are provided Both analog outputs are normally set to the full scale range of the analyzer Loop power 10 to 32 volts sourced from the end device PLC is required for the analog outputs If it is not possible to provide loop power optional powered AO boards are available H2S Analyzer Mainboard 330 331 Serles H2S Analyzer PLC DCS by others PLC Termination 250 ohm nominal 330 331 Serles H2S Analyzer PLC Termination 250 ohm nominal External Power Supply 12 to 24 VDC 330 331 Series H2S Analyzer An a jj AD 2 PLC Termination 250 ohm nominal Figure 10 4 20 mA Output Wiring Options 16 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 E 2 1 Optional Powered AO Board for Loop Power The Model 331 comes standard with 2 wire 4 20 ma output An optional 4 wired powered 4 20 ma output is sometimes included It is a small board located just below the analog output terminal on the main processor board 4 20 mA 4 20 mA Figure 11 Powered 4 20 mA option 17 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 F Calibration F 1 Calibration amp Alarms Analyzer configuration and calibration was set at the factory The factory gain and alarm settings can be found in the factory calibration sheet found at the end of this m
30. r Total sulfur reaction furnace converts all sulfur compounds to hydrogen Option sulfide which allows the analyzer to measure total sulfur Calibration Stream Switches between two sample streams or between hydrogen sulfide and ranges above 100 ppm sampling Liquids Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 C Principle of Operation Envent Engineering Ltd models 330 amp 331 use ASTM D4084 07 Standard Test Method for Analysis of Hydrogen Sulfide in Gaseous Fuels Lead Acetate Reaction Rate Method This method uses lead acetate impregnated paper referred to by Envent Engineering Ltd as H2S sensing tape The H2S sensing tape reacts when in contact with hydrogen sulfide by the relationship shown below This reaction is visibly evident by a brown stain directly on the H2S sensing tape Considering this reaction the electronics built into the Models 330 amp 331 have been programmed to measure the rate of darkening over time which in turn gives the hydrogen sulfide concentration H S Pb CH COO gt PbS 2CH COOH SAMPLE CHAMBER gt DETECTOR A SAMPLE VENT Figure 1 330 amp 331 Analyzer principle of operation diagram The figure above shows a flow regulated pressure regulated and filtered process sample gas passing through a membrane humidifier and into the sample chamber A window in the sample chamber allows the gas to come in contact with the sensing ta
31. sample lag time in the sample line if it is at high pressure or it is longer than 15 feet The standard sample tubing material is 1 4 316 stainless steel however 1 8 stainless steel tubing can be used if the response time is critical refer to table 4 Carbon steel sample line and or fittings are not acceptable D 2 1 Sample Lag Time vs Tubing Size Table 4 Sample Lag Time vs Tubing Size Tube Tube ID ID Flow Flow Pressure Lag Lag Size Gauge 49 9110 SCFH Std PSIA Time Time cc min per 100 per 100 min ery 3 8 20 0 319 0 810 5 2359 800 36 30 2178 3 8 20 0 319 0 810 5 2359 200 9 07 544 3 8 20 0 319 0 810 5 2359 50 2 27 136 1 4 20 0 181 0 459 5 2359 800 11 69 701 1 4 20 0 181 0 459 5 2359 200 2 92 175 1 4 20 0 181 0 459 5 2359 50 0 73 44 1 8 20 0 081 0 205 5 2359 800 2 34 140 1 8 20 0 081 0 205 5 2359 200 0 59 35 1 8 20 0 081 0 205 5 2359 50 0 15 9 11 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 D 3 Sample Conditioning The function of the optional sample conditioning system is to regulate and filter particulates or free liquids from the sample Consideration must be taken from all potential conditions when designing the sample conditioning system The figure below shows the typical sample conditioning system used for the 330 amp 331 NOTE Sample conditioning systems that provide sample dilution multiple s
32. ter Step 2 Sample line tubing Shut off flow at the sample point prior to sample conditioning system Flush the sample line and components with cleaning solution Rinse with fresh water Flush with isopropyl alcohol Dry with clean dry instrument air or gas Step 3 Sample conditioning system CAUTION Disassembly of the pressure regulator and solenoids in the field is not advised Consult the factory if the regulator or solenoid appears contaminated e Remove filter elements from filter housings and discard e Remove all sample conditioning system components and soak in cleaning solution Ensure valves are fully open when cleaning Flush sample components with fresh water Rinse with isopropyl alcohol Blow dry with clean compressed air or fuel gas If the any clear Tygon tubing appears discolored replace the tubing Tubing on humidifier should be replaced if it appears contaminated Step 4 Re assemble Stainless Steel Tubing to analyzer according to analyzer drawing refer to back of manual Step 5 Once sample conditioning system has been re assembled apply calibration gas to the analyzer refer to section E 2 Step 6 Adjust gain to indicate value from calibration certificate Step 7 Gains for streams should be 2 00 from factory calibration sheet or last calibration e If the reading is not within range then the analyzer sample conditioning system may need further cleaning Please consult factory 23 Envent Engineering Ltd
33. th the wires ex one cut Pressure switch NC NO COMM Envent Engineering Ltd mainboard fo ANALOG INPUTS m ao 8 z mM T Hg N f N N O Y T i j J F x DI i w a DI 24 NE i The pressure switch B BE8 lep P can be wired to anyof Di 3 o K i 3 Dr o 1 p the open discrete inputs P c DI 4 N N on the mainboard WI itele P Update the LI configuration when y changing discrete inputs TA ae so that the analyzer can WY awcknowledge the rd change P Figure 21 Optional Low Pressure Switch 32 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 This document has been continuously improved and revised over time see the table below for revision rev information Rev Description Oct 2012 Added electrical rating for group B on 330 For further information or a copy of our most recent operating manual please visit us at www envent eng com Envent Engineering Ltd reserves the right to change product design and specifications at any time without prior notice Head Office 7060E Farrell Road SE Calgary AB T2H 0T2 Canada T 1 403 253 4012 F 1 403 253 4016 CAN Toll Free 1 877 936 8368 info 9 envent eng com USA Office T 1 713 568 4421 USA Toll Free 1 877 936 8368 usasales envent eng com China Offi
34. tream switching auto calibration liquid measurement capability and or total sulfur measurement are available at customer request SAMPLE INLET 331 FLOW DIAGRAM 3W M Ne FILTER SAMPLE INLET DA 4 FI NV PR BV CALIBRATION INLET SAMPLE SWEEP NV Legend ED Eductor Pressure Regulator Filter Flow Indicator Needle Valve Block Valve 3 Way Valve Figure 7 331 amp 330 Flow Diagram The standard coalescing amp regulated sample conditioning system consists of a 5000 psig inlet filter and a 3000 psig inlet regulator A three way valve allows the user to switch from sample gas to calibration gas The sample sweep valve on the filter is left slightly open to drain any liquids that may collect and to reduce lag time in the sample piping 12 Envent Engineering Ltd 330 amp 331 Operator s Manual Last Updated 6 May 14 D 4 Installation Procedure Step 1 Unpack the analyzer and check for damage Step 2 Ensure that the analyzer power supply and range are suitable for the application Step 3 Check that the hazardous location rating is suitable for the installation location Step 4 Select an installation location that is close to the sample point e Ensure that the selected installation site provides adequate room for maintenance and repair Step 5 Bolt the analyzer to the wall with the tape drive at approximately eye level Step 6 Wire power analog outputs and discrete outputs to the analyzer CAUTION Turn o
35. ur analyzer was configured functionally tested and calibrated at the factory All test and calibration data is documented in the factory calibration report See the end of this manual AN CAUTION The analyzer should be mounted inan area in which it is not exposed to vibration excessive pressure temperature and or environmental variations Envent Engineering is available for installation and start up if required See Envent s pre commissioning guidelines on our website http www envent eng com documents php D 1 Sample Point Selection The sample to the analyzer must be representative of the process stream and should be taken from a point as close as possible to the analyzer to avoid lag times and sample degradation in the tubing A probe must be installed vertically on a horizontal section of pipe ensuring that the sample is drawn from between the middle and the top third of the pipeline An optional Genie GPR probe regulator may be used The function of this probe is to ensure a clean dry sample to the analyzer and to reduce the pressure of the sample The lower pressure will improve the response time of the analyzer For installation instructions refer to associated documents Do not install the Genie probe regulator on a vertical pipe D 2 Sample Volume and Flow Rate The sample should be supplied to the analyzer at 10 15 psig and at a flow between 100 200 cc min set flowmeter at 2 0 A bypass sweep is recommended to reduce
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