Novatech 1732 Technical Manual
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Novatech 1732 Technical Manual

Oxygen transmitter
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Oxygen Transmitter
Model 1732
Technical Manual
August 2018

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Summary of Contents for Novatech 1732

  • Page 1 Oxygen Transmitter Model 1732 Technical Manual August 2018...

  • Page 3: Table Of Contents

    5.3.2 Keypad in the Setup / Commissioning / Calibration Menu .............. 31 6. SETUP MENU ............................. 33 6.1 F ........................33 UNCTION UMMARY ABLE 6.2 S ..........................33 ETUP ISPLAY 6.3 C ........................33 HANGING PTIONS 6.4 S ......................... 34 ETUP UNCTIONS August 2018 Technical Manual 1732 Oxygen Transmitter...
  • Page 4 CCEPTING AN LARM 9.1.1 Current Alarms ..........................50 9.1.2 Alarm Log ............................50 9.2 C ............................ 51 OMMON LARMS 9.3 S ........................ 53 ELECTABLE ROCESS LARMS 9.4 A ..........................54 LARM ELAY PTIONS Technical Manual August 2018 1732 Oxygen Transmitter...
  • Page 5 APPENDIX 1, CONSTITUENT VALUES FOR VARIOUS FUELS ..............65 APPENDIX 2, PROBE EMF TABLES ......................66 APPENDIX 3, % OXYGEN SCALE TO LOGARITHMIC ................68 APPENDIX 4, MODBUS™ ..........................69 END OF LIFE TREATMENT AND FINAL DISPOSAL ................... 72 August 2018 Technical Manual 1732 Oxygen Transmitter...
  • Page 6 All information of a technical nature and particulars of the product and its use (including the information in this manual) are given by Novatech in good faith. However, it is acknowledged that there may be errors or omissions in this manual. A list of details of any amendments or revisions to this manual can be obtained upon request from Novatech Controls Technical Enquiries.
  • Page 7 The Novatech Burner Interlock Relay facility, which is a standard part of the Novatech transmitter, is designed to be wired to the main safety shut-off fuel valves in a way that can shutdown the probe heater when the fuel valves are closed.
  • Page 8 This page has been intentionally left blank. Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 9: Important Notices

    If this configuration does not suit or if it is possible for raw fuel to come into contact with a hot oxygen probe then the Model 1732 transmitter with a heated probe will not be safe in your application.

  • Page 10: Warning Symbols

    1.2 Warning Symbols Danger, high voltage. Risk of electrical shock. Caution hot surface. Caution, risk of danger. See additional information in the manual. Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 11: Introduction

    / fuel ration in the burner to maintain efficiency and safe operation conditions. The transmitter is designed to be used along with with the range of Novatech heated and unheated oxygen probes. These probes use a zirconia sensor operating in environments up to 1400° (2010°F). The 1231 oxygen probe has an integrated heater, while the 1232 probe uses the process heat to heat the sensor.

  • Page 12: Series 1230 Oxygen Probes & Sensors

    Novatech oxygen transmitters and some model transmitters from other manufacturers. All Novatech oxygen probe or sensors are designed and manufactured to exacting standards of performance and reliability. Series 1230 probe or sensors are the result of extensive research and development by Novatech, industry and government agencies.

  • Page 13: Device Specifications

    WARNING: All signal level connections onto the transmitter must be treated as safety extra-low voltage (SELV) as defined in the standard IEC61140. Double insulation must be used when connecting these terminals to systems that might carry high voltage. August 2018 Technical Manual 1732 Oxygen Transmitter...

  • Page 14: Series 1230 Probes Specifications

    1. Care must be taken to avoid contact with explosive or inflammable gases with 1231 heated probes and 1234 oxygen sensors when hot. Novatech transmitters have built in safety protection. 2. Process gas temperature must be below 800C if the filters are fitted.

  • Page 15: Model 1234 Sampling Sensor Specifications

    8. For model 1232 unheated probe, state thermocouple type. If not specified will assume R-type. For a list of options for the above requirements refer to the appropriate probe specification tables in the previous section. August 2018 Technical Manual 1732 Oxygen Transmitter...

  • Page 16: Operational Specifications

    -10.0 to 20.0% Burner efficiency 0 to 100.0% The oxygen deficiency output can be used in the same way as a combustibles analyser to signal the extent of reducing conditions of combustion processes. Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 17: Installation And Commissioning

    If there are any particulates in the flue gas, a filter can be omitted by pointing the probe vertically downwards. Otherwise the transmitter can be configured to automatically purge the filters, or they can be replaced periodically. August 2018 Technical Manual 1732 Oxygen Transmitter...
  • Page 18 Although it is rare, occasionally a probe may sense oxygen vastly differently from the average reading in the flue gas. If it occurs, then the probe should be moved, or a longer probe installed. This phenomenon is normally caused by stratification of the flue gas. Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 19: Installing A 1234 Oxygen Sensor

    The thermocouple should be of similar length to the oxygen probe to prevent flue temperature distribution errors. The thermocouple should be connected to terminals 7 & 8. These terminals will not be available for an auxiliary thermocouple if a second probe has been installed. August 2018 Technical Manual 1732 Oxygen Transmitter...

  • Page 20: A Shield Connections

    4.5a Shield Connections All external wiring to the 1732 transmitter should be shielded. Do not connect shields at the field end. Simply clip off and insulate. There are two M4 earth screw terminals available in the 1732 transmitter. An extra terminal strip may be required to connect all shields together. This should be supplied by the installer.

  • Page 21: Electrical Connections

    28 Alarm 1 wiring. DO NOT CONNECT MAINS and LOW VOLTAGE ON 27 Common Alarm ADJACENT TERMINALS 26 Common Alarm Connection Diagram for 1732 Transmitter and one or two 1231 / 1234 Heated Sensors August 2018 Technical Manual 1732 Oxygen Transmitter...
  • Page 22 DO NOT CONNECT MAINS and LOW VOLTAGE ON 27 Common Alarm ADJACENT TERMINALS 26 Common Alarm Connection Diagram for 1732 Transmitter and one or two 1232 Unheated Probes  The mains power must be either 100/110VAC or 220/240VAC with a mains frequency of 50 or 60Hz ...

  • Page 23: Heater Interlock Relays

    If a safety interlock is not required, a wire must be connected between terminals 10 &11 to enable –  The heaters on heated probes  Process alarms  Auto-purge and auto-cal checking  Run time timer August 2018 Technical Manual 1732 Oxygen Transmitter...

  • Page 24: Connecting An Oxygen Probe Cable

    EARTH screw in the transmitter Note 1: Numbers in the brackets are connector number if the probe is to be connected as probe #2 Connection of Probe Cable for Heated Probes Model 1231 and 1234. Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 25: Connecting A 1234 Sensor Cable

    If the 1234 has a weather proof connector, it will have been supplied with a cable that is already terminated with a matching plug. The other end of the cable can then be terminated in the 1732 transmitter as shown in...

  • Page 26: Connecting The Automatic Purge And Calibration Check System

    To Oxygen Probe Calibration check System Cal Port Piping Schematic Cal Check Gas 140kPa (20PSI) Max (optional) Flow switch for blocked filter alarm ChemTec LPH-125-7 Clean and Dry Purge Air Supply 140kPa (20PSI) Max Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 27: Connecting Reference Air

    The communications port of the 1732 can be configured to communicate on either RS232 or RS485. If the transmitter is to be used on a MODBUS network, the 1732 transmitter must be set to RS485. For further details see chapter 7.2.25 Communications Port Options.

  • Page 28: Commissioning - Run Mode

    Novatech probes can easily achieve this with or without a probe filter and a gas flow of only 1 to 5 litres/minute (120 to 600 scfm) for a 1231 probe and up to 20 litres/minute (2400scfm) for an unheated probe.

  • Page 29: Dust In The Flue Gas

    The effects of stratification can be reduced by using two probes and averaging the two oxygen readings. This can be achieved within a Novatech 1732 transmitter controlling two probes. 4.23 Connecting a Pressure Transducer If the process gas pressure varies more than 4" WG and therefore requires automatic compensation, connect a pressure transducer as shown below.
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  • Page 31: Display And Keypad

    ISPLAY AND EYPAD The 1732 Oxygen Transmitter has a graphic display, 8 buttons and 5 LED indicators to show the status of the transmitter. All of the buttons have multiple functions, depending on what is currently on the display. As a general starting point, the larger white text on the button is the function while the transmitter is in the Run Menu and the smaller black text on the button is the function in the Setup / Commissioning / Calibration Menus.

  • Page 32: Oxygen Display Units

    5.3 Keypad There are 8 buttons built into the label on front panel of the 1732 Transmitter. The button functions are written in BLACK and WHITE to identify the function of the button in either Run Mode or the Setup Menu system.

  • Page 33: Keypad In Run Mode

    NOTE: Access to the Commissioning Menu and Calibration Menu can be disabled by switching OFF the corresponding slider on DIP switch SW1 on the 1730 Main PCB. To enter either Commissioning Menu or Calibration Menu, the corresponding DIP switch SW1 on the 1730-1 PCB must be turned on. August 2018 Technical Manual 1732 Oxygen Transmitter...
  • Page 34 (terminals 12 & 13 and 14 & 15) back to an analogue input to the transmitter in order to calculate a zero and span calibration factor for each of the output channels. During this process normal output to the analog channels will be interrupted sending the outputs open circuit. Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 35: Setup Menu

     buttons. PTION 3. When the required option is on the display press the E button to save that value. NTER When finished, press the S button to return to the Run Mode. ETUP August 2018 Technical Manual 1732 Oxygen Transmitter...

  • Page 36: Setup Menu Functions

    Default: 0.0mV Each Novatech oxygen probe has an offset calibration value printed on a tag that is attached to the probe when it is dispatched. To achieve the most accurate measurement of oxygen the offset value must be entered into this setup function with the same polarity as it is printed on the label. For a healthy probe the offset value should be within ±1.0mV...

  • Page 37: Oxygen Display Units

    Disabled This function allows the operator to enable and disable process alarms. The process alarm menu functions will also be hidden if the process alarms are disabled. (See also chapter 7.2.20 Process Alarms) August 2018 Technical Manual 1732 Oxygen Transmitter...
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  • Page 39: Commissioning Menu

    7. C OMMISSIONING This chapter describes the functions available in the Commissioning Menu on the 1732 Oxygen Transmitter. To Access the Commissioning Menu;  Ensure the DIP switch SW1-2 on the main PCB is in the ON position  From Run Mode, press and hold the Setup button for approximately 2 seconds until the words “Commissioning Menu”...
  • Page 40 2400 – 115200 bps Serial Baud Rate 19200bps Serial Parity Even / Odd / No Parity Even Parity Disabled or 1 – 246 MODBUS Address Disabled Clear / Don’t Clear Don’t Clear Clear Alarm Log Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 41: Commissioning Menu Functions

    Default: Single Probe The 1732 transmitter can operate in single or dual probe mode. By selecting single probe, all dual probe options and alarms will be disabled and second probe options hidden from the user. If you are using the transmitter with a single oxygen probe, setting the number of probes to ‘single probe’ will disable all probe 2 alarms and display items.

  • Page 42: Transmitter Output Channel 1 & 2

    Default: Fixed The 1732 Transmitter is capable of fixed or variable input pressure compensation in the calculation of oxygen from -1 Atm to +3 Atm relative to ambient. If the probe is running in a pressurised environment this value should be set to allow for accurate oxygen measurement.

  • Page 43: Temperature Units

    24 hours forcing scheduling of events to occur at the same time each day between 1 minute and 7 days. The ‘No Timed’ option accessible by scrolling the option below 1 minute allows for pre-configured solenoid cycles that are only triggered manually via the keypad. August 2018 Technical Manual 1732 Oxygen Transmitter...

  • Page 44: Solenoid 1 & 2 Duration

    Oxygen 1 Very Low Calibration 1 In Progress Oxygen 2 Very Low Calibration 2 In Progress Oxygen 1 High Purge 1 In Progress Oxygen 2 High Purge 2 In Progress Oxygen Deviation Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 45: Common Alarm Relay Function

    To enable backward compatibility with the 1632 series transmitter, set this to Enabled. 7.2.24 Selecting the Correct Fuel The 1732 transmitter can calculate several measurements that are based on the oxygen reading and the temperature of the process gas. These calculations also require some details about the chemical makeup of the fuel.

  • Page 46: Reference Air Pump Options

    If external is selected, set the RH level. (5% if instrument air is used) 7.2.25 Communications Port Options The 1732 Transmitter has a serial communications port available at terminals 18 to 22. The default protocol is for RS-232 running at 19,200 baud rate with 8 bits, Even parity and 1 stop bit.

  • Page 47: Calibration Menu

    Enabled / Disabled Disabled Always On / Cycle Above xx°C Ref Pump Cycling Cycle Above 35°C (where xx is ranged 30-55°C) Dry Reference Air Wet Air / Dry Ambient / Dry Air Wet Air August 2018 Technical Manual 1732 Oxygen Transmitter...

  • Page 48: Calibration Menu Functions

    The low oxygen calibration factors can be used to fine tune the oxygen calculation at low oxygen readings. It will not affect the measurement at 20.9%. They are included to allow oxygen probes made by other manufacturers to be used on a Novatech transmitter. The default is 100% but can be set to between 80 and 120%.

  • Page 49: Transmitter Output Limiting

    Default: Automatic The default setting for the 1732 Transmitter is that it will automatically detect the mains voltage and frequency to correctly power the probe heaters. If there is any uncertainty in this detection system, the automatic voltage detection can be overridden and manually set.

  • Page 50: Burner Temp Override

    > ±1% from atmospheric oxygen. This allows for accurate readings at process level as well as seeing 20.95% in ambient air.  Always use humidity uncompensated ‘dry air’ as the reference oxygen concentration Dry Air when calculating process oxygen. Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 51: Alarms

    9. A LARMS The 1732 Oxygen Transmitter has 4 alarm relays, a built-in alarm annunciator and an alarm log. When an  button. alarm occurs, the Alarm Light will flash. To find out what the alarm is, press the A LARM ...

  • Page 52: Checking And Accepting An Alarm

     to scroll through the alarm events that have been saved in the alarm log. Use the O PTION PTION The alarm event will be transferred to the alarm log when the alarm has been cleared. Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 53: Common Alarms

    Use a digital multimeter to test the dryer TC and confirm whether it is open-circuit. Check any terminations for the Dryer TC cabling inside the transmitter and at any other termination points. Check for any physical damage to the dryer TC cable. August 2018 Technical Manual 1732 Oxygen Transmitter...
  • Page 54 One of the heater power control devices (SSR) has been found to have failed, but the transmitter cannot determine which one or ones have failed. Response to Alarm: See chapter 8.2.9 Heater SSR Fault Correction. Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 55: Selectable Process Alarms

    With heated probes this relay will be de-energised while the probe is heating up from ambient, making the contacts open circuit. 31. Cal 1 in Progress 32. Cal 2 in Progress A calibration check is occurring, triggered either in automatic mode or manually via the keypad. August 2018 Technical Manual 1732 Oxygen Transmitter...

  • Page 56: Alarm Relay Options

    In addition to the above process alarms that can activate the process alarm relays, any of the common alarm relay events that have been taken off the common alarm list in Commissioning Menu function #52 will appear on the process alarm relay lists in function #49 to #51. Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 57: Instrument Calibration

    ALIBRATION 10.1 Calibration Summary The 1732 Oxygen transmitter has a self-calibration and diagnostic system built into the hardware and software. Once the reference voltages have been set into memory the self-calibration system maintains the calibration of the transmitter. An automatic update of the zero and span is done every minute.

  • Page 58: Probe Calibration

    10.2.2 Resetting the Calibration Factors If it is required to reset the calibration factors, follow the instructions in the previous section and select ‘Reset’ when prompted to ‘Reset Calibration Data?’. Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 59: Gas Calibration Check And Purge

    This chapter describes the operation of this gas checking system. The 1732 has a timer and solenoid driving system that can be configured to admit a certified calibration gas into the probe or an air supply to purge the probe filters through the gas connection. Both the calibration gas and the filter purge gas must be piped to the port on the probe labelled “CAL”.
  • Page 60 This page has been intentionally left blank. Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 61: Software Upgrades

    Note also the direction of the EEROM. Pin 1 is identified by a small dot on the EEPROM. This dot MUST be oriented in the top right hand corner of the socket as indicated by the arrow on the board and the diagram. Pin 1 of the EEROM 1732 Ver. 1.29  and the A  buttons.
  • Page 62 NOTE: The transmitter may perform an automatic COLD START after the upgrade. The words ‘Cold Start’ will be shown on the display in step 14 if the cold start has been performed. The calibration will NOT be changed but the configuration may have been changed. Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 63: Troubleshooting

    The Novatech 1732 Oxygen Transmitter has proved an extremely reliable instrument. The troubleshooting guide here is based on an analysis of the potential problem that may occur after many years of operation in the field. A current list of problems and solutions can be found on the Novatech web site at www.novatech.com.au when any are identified.
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  • Page 65: Maintenance

    14.2 Cleaning The 1732 transmitter is made in an IP65 / IP54 rated diecast case. It is painted with a tough ripple finish power coating to maintain a clean look. However, if it is necessary to clean the case use either a warm soapy water solution or an isopropyl alcohol.

  • Page 66: Index

    Specifications - Hardware ..........................11 Specifications - Software ..........................14 SSR Fault Correction ............................47 Stratification ..............................27 Temperature units ............................41 Troubleshooting ............................61, 63 Voltage, mains supply ............................11 Warnings ................................7 Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 67: Appendix 1, Constituent Values For Various Fuels

    The moisture level varies depending on the process details. The calculated values assume M = O. The sulphur level varies depending on the process details. The calculated values assume S = O. Variable. Values calculated from the North American Combustion Handbook, Tables 2.1a and 2.1b. August 2018 Technical Manual 1732 Oxygen Transmitter...

  • Page 68: Appendix 2, Probe Emf Tables

    14.881 114.347 'K' Type TC 29.965 mV @ 720°C (1320°F) These tables are based on the Nernst equation: Where T is the probe temperature °K ZIRCONIA OXYGEN PROBE OUTPUT (mV) PROBE TYPE 1232 Technical Manual August 2018 1732 Oxygen Transmitter...
  • Page 69 47.513 These tables are based on the Nernst equation:         Where T is the probe temperature °K   Thermocouple information from NIST ITS-90 data tables August 2018 Technical Manual 1732 Oxygen Transmitter...

  • Page 70: Appendix 3, % Oxygen Scale To Logarithmic

    3, % O PPENDIX XYGEN CALE TO OGARITHMIC OXYGEN FULL SCALE 0.15 7.65 13.1 20.7 26.2 33.8 39.2 43.5 51.1 56.5 64.2 69.6 77.3 82.7 86.9 90.4 93.3 95.8 Technical Manual August 2018 1732 Oxygen Transmitter...

  • Page 71: Appendix 4, Modbus

    4, MODBUS™ PPENDIX The Novatech 1732 transmitter has the ability to work as a Modbus slave node on serial RS-232 or 3-wire RS-485 via RTU mode transmissions. By accessing information stored in the input and holding registers it is possible to access runtime variables, alarm conditions and modify the device configuration.
  • Page 72 1732 Transmitter Modbus Input Register Table for firmware v1.16 and newer Description Bits Type Description Bits Type Oxygen % floating point Auxilliary TC Temperature degC floating point EMF mV floating point Auxilliary TC Open Ct Flag boolean Temperature degC floating point...
  • Page 73 1732 Transmitter Modbus Holding Register Table for firmware v1.16 and newer Description Bits Type Description Bits Type 50mV Reference Voltage unsigned integer Transmitter 2 Output unsigned integer 200mV Reference Voltage unsigned integer Transmitter 2 Zero (Linear Oxygen 1) unsigned integer...

  • Page 74: End Of Life Treatment And Final Disposal

    For more information about where you can drop off your waste equipment for recycling, please contact your local city office or your general waste disposal service. Technical Manual August 2018 1732 Oxygen Transmitter...
  • Page 75 Electromagnetic Compatibility - Radiated and Conducted Emissions AS60529:2004 Degree of Protection Provided By Enclosures (IP Code) This product is manufactured in Australia under ISO9001:2008 quality systems and ISO14001:2004 environmental certification. Manufacturer’s name: Novatech Controls Pty Ltd Manufacturer’s address: 309 Reserve Road Cheltenham 3192 AUSTRALIA...

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