AMI 111 Manual Download

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Made in the USA

AMI

Oxygen Analyzer Manual

Model 111/111P

AMI,

Costa Mesa, CA

Summary of Contents for 111

Page 1: ...Made in the USA AMI Oxygen Analyzer Manual Model 111 111P AMI Costa Mesa CA ...

Page 2: ...rge the batteries 5 Location 5 Sample gas and electrical connections 6 Interconnections 7 Digital communications 7 Sample connection 7 Operation 8 General Description 8 Front Panel Controls 8 Flow Rate Adjustment 8 Front panel LED 8 Calibration 25 unit 9 Calibration 111 or 111P with optional 95 range 9 A note on analyzer linearity 10 Atmospheric pressure effects 10 Communication program 11 Top sec...

Page 3: ... Contents ii Data Logging 13 Variables 15 Maintenance and troubleshooting 16 Maintenance 16 Sensor Replacement 16 Battery Replacement 16 Troubleshooting 17 Specifications and Disclaimer 19 Specifications 19 Disclaimer 20 ...

Page 4: ...d but may be operated indefinitely from the wall charger supplied They are CE marked meaning that they meet the European and thus by default the American standards for EMI immunity and safety in a general purpose area They are not designed for use with flammable samples or in a hazardous area Oxygen analysis can be a problematical area for people with no experience in it and AMI is always happy to...

Page 5: ...mical analyzers particularly if the pump is used It has no analog output but instead records data electronically for subsequent download to a PC Features Single measurement range four datalog ranges selectable High resolution 3 digit LCD RFI protected Data logger USB virtual comport communication for advanced features Power requirements 115 230VAC to 12VDC battery charger Low minimum detection lim...

Page 6: ...to use a positive pressure sample The sample should be free of liquids and dust It must be free of combustible material since the sensor will oxidize anything combustible reducing the oxygen reading by the amount it took to burn up the contaminant It is intended to operate with nitrogen as the background gas high concentrations of other gases may be problematical mostly because any significant cha...

Page 7: ... gas or oil free compressed air The sensor is so stable that span calibrations are only necessary once or twice a year Unlike conventional sensors the sensor does not age when it is not powered WARNING All zirconium oxide sensors operate at high temperature and are unsuitable for measuring flammable gases Any hydrocarbon gas will oxidize on the sensor reducing the oxygen reading by the amount of o...

Page 8: ...nuous operation In the 111P they will last the same length of time if you don t use the pump the pump will drain them in about an hour if you use it continuously The unit is able to operate while the batteries are being charged The maximum voltage the power input can accept is 13VDC Anything higher than this will damage the unit Location The unit is designed to be used in a general purpose area It...

Page 9: ...electrical connections The sensor is built into the analyzer and does not need any separate installation It is equipped with compression fittings on the inlet The exhaust should be left open or if desired brought through a low restriction tube such as diameter plastic tubing to a safe area ...

Page 10: ...ry that avoids damage to fittings It uses O ring sealed hand removable fittings See the accessory page below Attach it to the analyzer using a suitable fitting Adjust the flow with the flowmeter valve to approximately 1 SCFH After one to two minutes depending on flow rate the reading will stabilize For the standard unit model 111 make sure the inlet pressure is between 0 5psig and 100psig For the ...

Page 11: ...rm up no matter how quickly you turn it on again after it has been turned off The Span button allows you to calibrate the unit See the Calibration section below The analyzer has a security feature which may be enabled by the User Interface program If enabled the span control will not have any effect This may prevent an unauthorized person from changing the calibration incorrectly Flow Rate Adjustm...

Page 12: ...ibration function with the AMI User Interface program If it is not apparently possible to change the calibration you must reset the security condition to All front panel adjustments allowed using the AMI user interface Perform the calibration as above and then change it back to No front panel adjustments allowed when you are done Calibration 111 or 111P with optional 95 or 50 range WARNING 95 oxyg...

Page 13: ...mend against doing this save as a last resort Atmospheric pressure effects The sensor is not particularly sensitive to changes in ambient pressure a 5psi ambient change will change its reading by 0 4 of its value i e 20 9 at 15psia will read about 20 8 at 10psia Atmospheric pressure changes are usually less than 1psi so the error due to this will be unnoticeable Greater changes will be noticed fro...

Page 14: ... at the top will show a screen as above Select the appropriate port click Open Com and the program will automatically select the appropriate baud rate and determine the kind of analyzer present It will fill in the relevant boxes and grey out the irrelevant ones The ports available will be shown Depending on your particular computer the port may be anything If there are more than one available you ...

Page 15: ...are populated by the program from data provided by the analyzer The 111 series of analyzers do not have all the features supported by this program so a number of these boxes will be greyed out The analyzer model code will be shown at the top of this section The current oxygen reading will be shown in the Reading text box The span factor will be shown below that The power supply voltage is shown in...

Page 16: ...nalyzer shown The program shows what the analyzer thinks is the current time and date and also what your computer thinks is the current time and date You can send the computer time and date to the analyzer by clicking on the Set Analyzer Time button If you change the time and date you may want to click the Clear Data button so the software doesn t get confused by later times being earlier than ear...

Page 17: ... clear the data so that no confusion can arise You can download the stored data by pressing the Download Data button It may take a couple of minutes to get it all and the progress of this process is shown in a color bar in traditional Windows style though unlike most Windows programs the length of the bar does in fact correspond with the amount of data already retrieved Once the data is retrieved ...

Page 18: ...ommunication program It allows you to interrogate the analyzer for a particular variable manually but normally this is not necessary When the analyzer is first connected the program will fill up all the variables in the list and will then poll a subset of them regularly If desired the REFRESH button will cause the program to update every variable Mostly this screen is used for troubleshooting ...

Page 19: ... t come out very far as it is attached to many wires 2 Disconnect the USB connector ribbon cable from the pc board 3 If it is easier unscrew the terminals holding the four sensor wires 4 Remove the four socket head cap screws holding the battery bracket These are located on the left side of the unit 5 Remove the battery bracket 6 Locate the two wires leading from the batteries to the pc board and ...

Page 20: ...st the flow Analyzer reads too high 1 Verify that the gas flow rate is approximately 1 SCFH 2 Check for leaks in the sample system using SNOOP or similar 3 Oxygen diffusion can be a problem Verify that no silicone tubing is used in the sample system Use Copper Stainless Steel Teflon Tygon or similar high quality tubing 4 Verify the analyzer calibration using air as the span gas Analyzer reads zero...

Page 21: ... 1 of hydrogen or carbon monoxide will reduce the oxygen reading by 0 5 of oxygen if the sample contains 1 hydrogen 2 oxygen and balance nitrogen the reading will be 1 5 If the sample contains 0 1 of pentane C5H12 this will eat up 1 3 of oxygen reducing the reading to 0 7 in the above case 6 If you are trying to read oxygen levels below 1 the above effects may be very significant 7 Verify no expos...

Page 22: ...ation 2 of scale over temperature range 90 full scale response times for specified range 0 25 12 seconds 0 95 12 seconds Long life zirconium oxide sensor 10 year life expectancy Area Classification o Model 111 and 111P Designed to meet General Purpose requirements o Model 111B Designed to meet Class 1 Div 2 Groups C D requirements Inlet gas pressure o Model 111 0 5 to 100psig o Model 111P and 111B...

Page 23: ...designed for operation with non flammable samples in a general purpose or Class 1 Division 2 Group C D area Any damage resulting from its use in a more hazardous area is expressly the responsibility of the user The AMI analyzer is not designed as a primary safety device that is to say it is not to be used as the primary means of assuring personnel safety In particular it is not designed to act as ...

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