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Installation and Operation 

 

AMI

 Analyzer Manual

12 

Figure 4 Flow Schematic 

Initial Calibration: 

The sensor has already been installed, and it is ready for operation.  The analyzer has been calibrated at the 
factory, but changes in altitude will affect the calibration, so it is best to start off with an initial calibration.  
Use this procedure: 

1. Connect a stainless steel regulator (with Stainless Steel diaphragm ONLY) to span gas tank.
2. Connect the output of the regulator to the span inlet of the analyzer located on the right

side of the NEMA 4 box.

3. Set the regulator pressure to 10psig.
4. We recommend using the special AMI supplied span gas tubing with O ring sealed fittings

so as to prevent fitting damage to the span port.

5. Confirm all fittings are tight.
6. Press the ALARM HOLD OFF button, and adjust the time displayed suitably (typically 30

minutes).  This prevents unintentionally setting off alarms if the gas value is higher than the
alarm set points.

7. Turn the analyzer flow valve on the front of the NEMA 4 box to the SPAN position.

Flowmeter

Span inlet

Sensor

Exhaust

Sample inlet

Summary of Contents for 3010BR

Page 1: ...AMI H2S Analyzer Manual Model 3010BR AMI Costa Mesa CA ...

Page 2: ...tion 3 Sensor Warranty 4 Instrument Warranty 4 Hydrogen sulfide toxicity 4 Important 6 Points to consider first 6 Installation and Operation 7 Installation 7 Location 7 Safety Considerations 8 Installation Procedure 9 Initial Calibration 12 Front Panel Settings and Adjustments 14 General Description 14 Security 14 Front Panel Controls 14 Output Ranges 15 View Output Range 15 ...

Page 3: ...re 16 Default Settings 16 Changing the output from 1 5 VDC to 4 20mA or vice versa 17 Output Selection 18 Flow Control 19 Advanced Features and Communications 21 Communication Program 21 Maintenance and troubleshooting 22 Maintenance 22 Periodic Calibration 22 Sensor Replacement 22 Sensor replacement cautions 22 Sensor replacement procedure 24 Specifications and Disclaimer 25 Specifications 25 Dis...

Page 4: ...ovides a complete system for monitoring natural gas gathering systems and many other hydrogen sulfide applications Please verify that the analyzer was not damaged in transit If so please contact the shipper as well as AMI WARNING HYDROGEN SULFIDE IS EXTREMELY TOXIC AND CAN BE LETHAL Read this manual carefully before using this instrument Caution Read and understand this manual fully before attempt...

Page 5: ...gned to be responsive primarily to hydrogen sulfide but it will also respond to mercaptans and sulfur dioxide It should not be used if percent levels of carbon monoxide or hydrogen are present Features Compact size Unique cell block Front panel sensor access Built in span gas selection valve Integrated sample system Metering valve flow control Integrated flow meter Optional heater for cold weather...

Page 6: ...nents along with the output circuitry are mounted in the small explosion proof box to the left This allows complete control and maintenance when needed without declassifying the area or having to open an explosion proof enclosure The analytical circuit is an intrinsically safe circuit that is absolutely incapable of igniting an explosive mixture of gases even in the presence of two worst case faul...

Page 7: ...stead hydrogen sulfide presents its own set of issues These are mainly due to the fact that hydrogen sulfide sticks to surfaces and so the walls of the sample tubing act as a sort of filter they have to be filled up with hydrogen sulfide before the gas that comes out has the same amount of hydrogen sulfide in it as it did when it entered the tubing If you use plastic tubing or components this prob...

Page 8: ...r with awareness of danger 320 530 ppm leads to pulmonary edema with the possibility of death 530 1000 ppm causes strong stimulation of the central nervous system and rapid breathing leading to loss of breathing o 800 ppm is the lethal concentration for 50 of humans for 5 minutes exposure LC50 Concentrations over 1000 ppm cause immediate collapse with loss of breathing even after inhalation of a s...

Page 9: ...s available with a built in pressure regulator for high pressure lines up to 1200psig Power supply if you are going to run the unit off solar power using a battery you need to size both the battery and the solar panel correctly The analyzer draws about 30mA at 14 4 volts but if you select the 4 20mA output option this will go up to about 60mA A heater draws up to 1 67A when the temperature is at i...

Page 10: ...ss 1 division 2 Group B C D area with a flammable gas sample allowed When equipped with the optional heater it may be mounted outdoors in severe environments though it should be given a sun shield if in direct sunlight It should be mounted at a suitable viewing level Refer to the drawing figure 1 showing the analyzer dimensions EXPLOSION PROOF SEALS ARE REQUIRED ON THE POWER AND SIGNAL CONDULET EN...

Page 11: ...esigned so that a hazardous gas may be introduced into its NEMA compartment This gas may be any group B C or D gas The unit consists of two enclosures mounted on a back panel The smaller enclosure on the left is explosion proof and contains the electrical connections for the user and also the power supply and safety components for the NEMA 4 enclosure The NEMA 4 enclosure contains the analytical c...

Page 12: ...st the inlet pressure to 25 psig d Connect the exhaust to a line that goes outside the building or to a suitable purge system Make sure it runs downhill so no condensation from a wet sample forms ice or water and blocks it up in it in winter e Turn the sample valve to SAMPLE f Adjust sample flow to 1 SCFH with the flow control valve We recommend that you use an Analyzer Guardian a liquid rejection...

Page 13: ...nce and can handle up to AWG 12 gauge wire d Connect the power wires to the terminals marked Power Input If using DC the positive supply line connects to the terminal marked and the negative line to the terminal marked If using AC the hot line is connected to the terminal marked H and the neutral to the terminal marked N In either case the ground terminal marked with the ground symbol MUST be conn...

Page 14: ...t panel only a Select the desired output range by pressing the Output Range button then scrolling with the UP or Down buttons b Set the two alarm set points by pressing Alarm 1 or Alarm 2 and scrolling to the desired set point c For details on the front panel controls see the chapter in this manual called Operation 7 If it is desired to use the advanced functions available purchase the AMI user in...

Page 15: ...output of the regulator to the span inlet of the analyzer located on the right side of the NEMA 4 box 3 Set the regulator pressure to 10psig 4 We recommend using the special AMI supplied span gas tubing with O ring sealed fittings so as to prevent fitting damage to the span port 5 Confirm all fittings are tight 6 Press the ALARM HOLD OFF button and adjust the time displayed suitably typically 30 m...

Page 16: ...new this number is about 500 but as the sensor ages the number will increase When it gets up to 1000 the sensor will have to be replaced 11 Rotate the valve back to the Sample position 12 Readjust the flow rate to 1 SCFH if necessary If the span gas reads more than 25 wrong something is wrong either with the gas or with the plumbing Also changes in altitude will affect the calibration See the trou...

Page 17: ...munications section If you are going to set up the analyzer using the advanced computer interface you can skip this section Security Through the user interface three levels of security can be set These are No security all front panel controls work Span only the span control and the alarm hold off button are allowed to operate and Full security only the Alarm hold off button performs a function tho...

Page 18: ...curity level must be set to full or span only security In this case change the security level with the laptop and the AMI User Interface program Alarm Set Points The alarm set points can be viewed and changed if security allows from the front panel All the other alarm configuration settings can only be changed with the AMI User Interface program See Advanced Features and Communications below View ...

Page 19: ... Release the button and after three seconds if security does not forbid it the new span factor is stored the SPAN flag disappears and the analyzer drops back to normal operating mode View the Span Factor The model 3010BR has a Span Factor feature It can be displayed on the LCD by pressing the UP arrow by itself when the analyzer is in normal operation meaning not in a function such as spanning or ...

Page 20: ...under the cover plate in the explosion proof housing see Fig 3 above The positioning of the switch is indicated on the PCB itself put switch on the left hand position for 4 20mA and put it on the right hand position for 1 5V The 4 20mA option will increase the current draw to some degree if the unit is powered from DC and the heater is not used The output 4 20mA circuit is capable of driving a 600...

Page 21: ... 1 5V output or vice versa swap around the switch as shown in the figure above It is in the left hand position for 4 20mA and the right hand position for 1 5V If you switch between the two options the internal calibration will be fairly close but not perfect so it may be necessary to use the AMI User Interface to make the output exact ...

Page 22: ...to prevent gas from flowing past the sensor useful when replacing the sensor Rotate the valve until the groove in one side of the valve corresponds with the position marking and the detent clicks into place Flow Control valve Located in the center of the 3 way selector valve This provides flow control of the sample or span gas flowing past the sensor as indicated in the flowmeter Flow meter Shows ...

Page 23: ...and Span and Exhaust gas connections Located on the right side of the NEMA 4 box They all use Swagelok fittings though if the span connection if likely to be made and broken may times it is best to use the AMI provided sample tubing with O ring style fittings ...

Page 24: ...h the industry standard ModBus protocol running on an RS485 loop and the AMI User Interface software connected via a USB port If the USB connection is detected the ModBus connection will be disabled Details of these protocols can be found in the AMI Communications Manual provided upon request or downloaded from the AMI website at www amio2 com ...

Page 25: ...ate more often Sensor Replacement This should be done based on the Span Factor feature rather than as a response to a dead sensor See the Front Panel Settings and Adjustments section earlier in this manual Sensor replacement cautions CAUTION The sensor contains an acid If there is any sign of a liquid in the cell compartment do not allow it to come into contact with your skin If it does immediatel...

Page 26: ...Maintenance and troubleshooting AMI Analyzer Manual 23 Figure 7 Inserting sensor in cell block ...

Page 27: ...y 8 Carefully replace the cap making sure that you do not cross thread it and tighten firmly by hand Do not over tighten 9 Press the ALARM HOLD OFF button and adjust the time displayed suitably typically 30 minutes This prevents unintentionally setting off alarms if the gas value is higher than the alarm set points 10 Turn the analyzer flow valve on the front of the NEMA 4 box to the SPAN position...

Page 28: ...DC with heated option Minimum detection 50ppb of Hydrogen Sulfide H2S Repeatability 1 of range or 0 2ppm of H2S whichever is greater Operating temperature range 25 to 115 F non heated 20 to 115 F heated option Diurnal temperature specification 2 of scale over temperature range 90 full scale response times for specified range 0 100ppm 120 seconds 1 5SCFH0 2000ppm 120 seconds 1 5SCFH Response to Met...

Page 29: ...thout either indicator for Canada only Issued by Oong Lee PRODUCTS CLASS 4828 02 SIGNAL APPLIANCES Toxic Gas Detection Instruments For Hazardous Locations CLASS 4828 82 SIGNAL APPLIANCES Toxic Gas Detection Instruments For Hazardous Locations Certified to U S Standards Class I Division 1 Groups B C and D Series 2010BR and 210BR Oxygen Analyzers and series 3010BR Hydrogen Sulfide Analyzers input ra...

Page 30: ...on It is the responsibility of the manufacturer to provide and apply these additional markings where applicable in accordance with the requirements of those authorities The products listed are eligible to bear the CSA Mark shown with adjacent indicators C and US for Canada and US indicating that products have been manufactured to the requirements of both Canadian and U S Standards or with adjacent...

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