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AMI 201RSP Manual

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AMI
Oxygen Analyzer Manual
Model 201RSP
AMI, Costa Mesa, CA
AMI Analyzer Manual
Contents • • • • i

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  • Page 1 Oxygen Analyzer Manual Model 201RSP AMI, Costa Mesa, CA AMI Analyzer Manual Contents • • • • i...

  • Page 2: Table Of Contents

    Contents Preface The AMI story Caution Address Model 201RSP Oxygen Analyzer Introduction Features: Oxygen sensor: Sensor Warranty: Instrument Warranty: Receiving the analyzer Important: -------------------------Points to consider first! ------------------------------ Installation and Operation Receiving the analyzer Installation. Location: Short-form Installation Procedure Laptop set up procedure:...
  • Page 3 Communication program: Top section: Analyzer Info Section: Analyzer Setup Section: Sensor Calibration Data: Data Logging Variables: RS-485 Modbus Introduction: RS-485 Modbus Communication: Overview: Commands: The Oxygen Reading: Other readings: Diagnostic Functions AMI Analyzer Manual Contents • • • • iii...
  • Page 4 Maintenance and troubleshooting Maintenance: Periodic Calibration: Sensor Replacement: Sensor replacement cautions: Troubleshooting All oxygen applications Specifications and Disclaimer Specifications: Disclaimer Index Error! Bookmark not defined. AMI Analyzer Manual Contents • • • • iv...

  • Page 5: Preface

    Several aspects of the design are the subject of patents, number 5,728,289 and 6,675,629; the sensors are also covered by a patent, number 7,316,768. Please verify that the analyzer was not damaged in transit. If so please contact the shipper as well as AMI. Caution Read and understand this manual fully before attempting to use the instrument.

  • Page 6: Model 201Rsp Oxygen Analyzer

    USB connection for AMI provided software • • Bi-directional serial output with simple RS485 connection for ModBus™ protocol • • 90-240VAC operation • Backed by a two year warranty (excluding sensor) AMI Analyzer Manual Model 201RSP Oxygen Analyzer • • • • 2...

  • Page 7: Oxygen Sensor

    The cell is linear throughout its range. The span calibration may be performed using standard span gases or ambient air. Unlike competitive sensors, the AMI sensor is made using a high capacity metallic body that provides long life with about twice the active ingredients of conventional sensors.

  • Page 8: Important

    Sample conditions – if your sample is hot and wet, you will need to keep water from condensing in the sample line or analyzer. Contact AMI for advice. If the sample contains high amounts of CO2, it will be necessary to temperature control the analyzer so that the sensor doesn’t explode like a can of soda on your car’s dashboard in summer.
  • Page 9 In addition, since the analyzer includes a pump, you have to take care that you do not pressurize the sensor with the span gas. It will be necessary to use a bypass valve and flow meter on the span inlet of the analyzer. AMI Analyzer Manual Important: • • • • 5...

  • Page 10: Installation And Operation

    Although the unit is RFI protected, do not to mount it close to sources of electrical interference such as large transformers, motor start contactors, relays etc. Also avoid subjecting it to excessive vibration – anything worse than a truck may be problematical. AMI Analyzer Manual Installation and Operation • • • • 6...
  • Page 11 9.00 8.60 Ø0.21 7.92 5.05 3.00 4.81 Analyzer case outline (dashed) Cut out Front panel outline Figure 1. Outline and Cut Out Drawing AMI Analyzer Manual Installation and Operation • • • • 7...

  • Page 12: Short-Form Installation Procedure

    Arrange that you can readily see the reading given by this device. iii. On the AMI User Interface, check the “Zero” check box under SETUP in the ANALYZER SETUP section.
  • Page 13 15. Test the entire system, including anything controlled by the alarms or analog output, using a cell simulator (this is an optional device provided by AMI). 16. If not using span gas, press and hold the SPAN button on the front of the analyzer for 5 seconds until the LED turns blue.

  • Page 14: Laptop Set Up Procedure

    8. If you want to name the analyzer, click on the “User ID:” box. A dialog box will come up, asking for a password. Use “AMI” (in capitals) as the password, and then write in up to 12 characters as a name for the analyzer.

  • Page 15: Expanded Installation Procedure

    Expanded Installation Procedure Figure 2. The 201RSP This section follows the format of the installation procedure above but with greatly expanded explanations and coverage of detail issues. 1. Mount analyzer at a convenient eye level. The basic analyzer is designed for operation between 25ºF and 115ºF. It is available with a heater, but this is intended only to stabilize its temperature if it to be measuring in pure CO2.
  • Page 16 If using the analyzer with a glove box or similar device, it is often appropriate to return the sample to the source. Bear in mind that you might not want to do this if you intend to calibrate with air! AMI Analyzer Manual Expanded Installation Procedure • • • • 12...
  • Page 17 Higher flow rates will tend to increase the pressure on the sensor which will increase the oxygen reading. Figure 3. The 201RSP back panel 8. Connect power, relay contacts, analog output and RS485 if desired. If using conduit, run the power and alarms in one conduit, and the analog output and RS485 in the other.
  • Page 18 Normally you would use the ground terminal for a shield. It is possible to use the AMI User Interface program on a laptop to calibrate the 4-20mA output to your monitoring device.
  • Page 19 Also, we set it up on PST, and your time zone may be different. So set the time, and clear the data. In due course, click on the Download Data button to see the stored data. AMI Analyzer Manual Expanded Installation Procedure • • • • 15...
  • Page 20 12. Test the entire system, including anything controlled by the alarms or analog output, using a cell simulator. As an option, AMI can provide a “Cell Simulator” that mimics the operation of a sensor between 0-100ppm, so that you can verify that your control system or flow computer correctly reads the analyzer’s output and responds correctly to the alarm contacts.
  • Page 21 Shut off the regulator outlet valve and leak check all fittings, gauges and packing glands with Snoop™ ™ ™ ™ or equivalent. Again, flow the liquid on, don’t spray it on. Make sure you check the regulator and tank valve as well. AMI Analyzer Manual Expanded Installation Procedure • • • • 17...
  • Page 22 20 seconds before you tighten it. If you are not going to leave the span gas tank permanently connected it is preferable to use the AMI special flexible non-diffusive tubing with its O-ring sealed fittings so that you don’t destroy the span inlet fitting on the analyzer.
  • Page 23 When it does so it means that you will need a new sensor soon. The sensor behaves rather like a NiCd battery – it is stable until suddenly it starts to fail. AMI Analyzer Manual Expanded Installation Procedure • • • • 19...
  • Page 24 The analyzer is now set up and calibrated. It is normally good practice to give it a day or two and recheck the calibration. AMI Analyzer Manual Expanded Installation Procedure • • • • 20...

  • Page 25: Interconnections

    Interconnections: Figure 5. Back panel of the 201RSP. Alarm connections: The alarm connections are single pole double throw relays, i.e. Form C contacts. They may be programmed to go into alarm mode either above or below a set point, to open (the normally closed) contacts or close them, and to either latch or not latch, that is, go back out of alarm when the oxygen level returns below (or above) the set point or else wait until the operator presses the “ALARM ACKNOWLEDGE”...

  • Page 26: Serial Connections

    Serial connections: The 201RSP provides two serial connections – a USB port that can talk to a standard PC running the AMI User Interface software, and an RS485 connection that supports the standard ModBus protocol. The unit detects the presence of a USB connection, and disables the RS485 connection if one is detected.

  • Page 27: Sample Handling

    Sample Handling: Figure 6 Flow Schematic of the 201RSP. This analyzer expects to see ambient inlet pressure. It contains an integral needle valve and flowmeter for controlling and observing the sample flow. It also contains solenoid valves that seal off the sensor when power fails, and also that can select between the sample and a span calibration gas.

  • Page 28: Operation

    Through the user interface, three levels of security can be set. These are: No security (all front panel controls are active), Span (only the span control and the ALARM ACKNOWLEDGE (ALARM SILENCE/SEQUENCE TIME) button are allowed to operate), and Full security (only the ALARM AMI Analyzer Manual Expanded Installation Procedure • • • • 24...

  • Page 29: Front Panel Controls

    If the output range does not change, the security 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.

  • Page 30: View Alarm Set Points

    Calibration (Spanning) The model 201RSP may be calibrated using air as the span gas, or else using a lower level gas closer to the measurement range. It is not necessary to zero the analyzer. Spanning is normally performed somewhere between once a month and once every three months, depending on the level of accuracy required.

  • Page 31: Verify Span Factor

    LED will change back to green (or red if it is in alarm). 3. If not using the span gas valve feature in the 201RSP, press the span button momentarily (so that the unit shows its “SPAN” flag) and let it go, and then press and hold the UP or DOWN button until the reading matches the span gas value, or if using air, 20.9%.

  • Page 32: Alarm Functionality

    Alarm Functionality: The model 201RSP has two alarms, with two associated relays. As shipped, these are set to operate as high alarms (they go into alarm if the oxygen level goes above the set point), and set to failsafe mode (i.e.
  • Page 33 The alarm hold off period may be set by the front panel, or the user interface, and by default is one minute. The alarm hold off is triggered whenever the ALARM ACKNOWLEDGE button is pressed AMI Analyzer Manual Expanded Installation Procedure • • • • 29...

  • Page 34: Communications

    Basics The 201RSP supports both a USB link to a local PC, and RS485 over a network. Only one of these can be active at a time, and the unit automatically turns off the RS485 if it detects a computer plugged into the USB connection.

  • Page 35: Communication Program

    Note that if the analyzer loses power, you will have to restart the AMI program as the USB chip will have to restart.

  • Page 36: Top Section

    The power supply voltage is shown in the box marked “Power”, and the type of analog output that the unit was originally configured with shown below that (this will always be 4-20mA). The output range is shown, and also the security setting and the analyzer serial number. AMI Analyzer Manual Communications • • • • 32...

  • Page 37: Analyzer Setup Section

    You can do this using the Analog output calibration. To calibrate the analog output, you will need to have a meter set up for measuring current. 1. Select “Zero” by clicking in the appropriate radio button. AMI Analyzer Manual Communications • • • • 33...
  • Page 38 The least value for this setting is 0, but in fact if the button is pressed the analyzer will hold the alarms off for a minimum of ten seconds. AMI Analyzer Manual Communications • • • • 34...

  • Page 39: Sensor Calibration Data

    If you perform another calibration on the same day, it will overwrite the one you just did, but AMI Analyzer Manual Communications • • • • 35...

  • Page 40: Data Logging

    1% of the output range. If the reading goes above the output range limit, it will be stored as a percentage of the next AMI Analyzer Manual Communications • • • • 36...
  • Page 41 “00”. If it isn’t it implies that there is something wrong with the hardware and the unit should be returned to AMI for repair. (The unit stores its configuration data in four separate locations, so that any one memory error won’t affect its operation).

  • Page 42: Variables

    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. AMI Analyzer Manual Communications • • • • 38...

  • Page 43: Rs-485 Modbus Introduction

    If you don’t do this you will get error messages. This coil is reset upon power failure, so it is as well to set it every time you attempt to write into the analyzer. AMI Analyzer Manual Communications • • • • 39...

  • Page 44: Rs-485 Modbus Communication

    RS-485 Modbus Communication: Overview: Version 3 of the 201RSP analyzer supports the Modbus™ RTU protocol over an RS-485 link. This can be permanently wired up. The RS-485 link is disabled whenever the USB connection is attached, so that it doesn’t need to be disconnected and the USB communication won’t interfere with the network traffic on the RS-485 bus.

  • Page 45: The Oxygen Reading

    In order to help with this fact, one of the registers shows the number of hours that the AMI Analyzer Manual Communications • • • • 41...
  • Page 46 Two other registers show the number of hours that the sensor saw temperatures below 32F or above 110F. Finally, the user info is shown in the last several registers. AMI Analyzer Manual Communications • • • • 42...
  • Page 47 L2.5 User info byte 6 L2.6 User info byte 7 L2.7 User info byte 8 L2.8 User info byte 9 L2.9 User info byte 10 L2.10 User info byte 11 L2.11 AMI Analyzer Manual Communications • • • • 43...
  • Page 48 Serial number 0 Serial number 1 Serial number 2 Serial number 3 Serial number 4 Serial number 5 Serial number 6 Software revision 0 Software revision 1 Software revision 2 Modbus address AMI Analyzer Manual Communications • • • • 44...
  • Page 49 In every case, nonsense values may be present if the unit hasn’t had that number of experiences. If so the colons won’t be present in the strings. None of these higher registers may be written into. AMI Analyzer Manual Communications • • • • 45...
  • Page 50 Allow writing into analyzer Enables writing Disables writing For example, to rest latched alarms, set coil 24, reset coil 15, wait for a second or so, then set coil 15. AMI Analyzer Manual Communications • • • • 46...

  • Page 51: Diagnostic Functions

    11 08 00 10 Number of NAK responses Number of messages with incorrect parameters (such as invalid registers or out-of-bounds values) seen by the analyzer AMI Analyzer Manual Communications • • • • 47...

  • Page 52: Maintenance And Troubleshooting

    Maintenance and troubleshooting Maintenance: The model 201RSP is virtually maintenance free other than for periodic calibration and occasional sensor replacement. Periodic Calibration: The analyzer should be calibrated about once every month to obtain the best accuracy. The sensor typically declines in sensitivity by about 1% per month, so a monthly calibration is usually satisfactory. Use in a particularly aggressive environment may degrade the sensor faster: in this case calibrate more often.

  • Page 53: Sensor Replacement Cautions

    O ring Cell block Electrodes Sensor Electrodes Cell block front Sensor Membrane Down Figure 11. Inserting sensor in cell block AMI Analyzer Manual Maintenance and troubleshooting • • • • 49...

  • Page 54: Troubleshooting

    2. Check that the fuses in the power entry module are not blown. If they are, it indicates that something has gone seriously wrong. Only replace them with 1A fast blow fuses – if these blow, return the unit to AMI for repair. Don’t put nails in there!. Analyzer reads too low 1.
  • Page 55 Maintenance. No voltage or current output to recording device 1. Verify that the output wires are properly stripped and connected. 2. Verify the connections on the output terminal block. AMI Analyzer Manual Maintenance and troubleshooting • • • • 51...
  • Page 56 1. Using the RS-232 interface, verify that the security is set the way you want it. Still no correct operation 1. Call AMI at 714 848 5533, and ask for Technical assistance. 2. Or contact us by email at sales@AMIO2.com.

  • Page 57: Specifications And Disclaimer

    Overall dimensions: 9” w x 5” h x 7” d Mounting hole dimensions: 7.92” w x 4.81” h Weight 10 lbs To be installed only in installation (overvoltage) category I or II. AMI Analyzer Manual Specifications and Disclaimer • • • • 53...

  • Page 58: Disclaimer

    AMI’s obligation is expressly limited to the analyzer itself. 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 a medical instrument, monitoring breathing air for correct oxygen concentration, and should not be used as such when it is the only safety device on the gas system.

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