Michell Instruments QMA601-LR User Manual
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Michell Instruments QMA601-LR User Manual

Process moisture analyzer
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QMA601/QMA601-LR
Process Moisture Analyzer
User Manual
97449 Issue 5
October 2023
nbn Austria GmbH

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  • Page 1 QMA601/QMA601-LR Process Moisture Analyzer User Manual 97449 Issue 5 October 2023 nbn Austria GmbH...
  • Page 2 Please fill out the form(s) below for each analyzer that has been purchased. Use this information when contacting Michell Instruments for service purposes. Product Name Order Code Serial Number Invoice Date Installation Location Tag Number Product Name Order Code Serial Number...
  • Page 3 © 2023 Michell Instruments This document is the property of Michell Instruments Ltd and may not be copied or otherwise reproduced, communicated in any way to third parties, nor stored in any Data Processing System without the express written authorization of Michell Instruments Ltd.

  • Page 4: Table Of Contents

    QMA601 User Manual Contents Safety ..........................viii Warnings ........................viii Electrical Safety ......................viii Pressure Safety ......................viii Hazardous Materials (WEEE, RoHS3 & REACH) ............. viii Calibration (Factory Validation) ..................ix Repair and Maintenance ....................ix Abbreviations ........................x INTRODUCTION ....................1 General ......................1 Theory of Operation ...................
  • Page 5 Data Logging ....................66 7.6.1 Configuring Logging Start Time ..............66 7.6.2 Configuring Logging Stop Time ..............67 7.6.3 Starting the Log ..................67 7.6.4 Viewing a Log ..................... 67 Parameters / Field Calibration ................67 7.7.1 Field Calibration ..................68 Michell Instruments...
  • Page 6 QMA601 User Manual Figures Figure 1 Measurement System .................3 Figure 2 Mounting Dimensions .................6 Figure 3 Earth Bolt And Nut Washer Assembly ............9 Figure 4 24 V DC & 240 V AC Power Unit Connectors ..........10 Figure 5 Other Electrical Connections ..............11 Figure 6 RJ45 to screw terminal adapter connections ..........12 Figure 7...
  • Page 7 Set Points and Ranges ..............92 Gases for Gas Correction Values ........... 93 Appendix D Quality, Recycling, Compliance & Warranty Information ........ 95 Appendix E Return Document & Decontamination Declaration ........97 Appendix F Calculating Conversion Factors for Gas Mixes ..........99 Michell Instruments...

  • Page 8: Safety

    QMA601 User Manual Safety The analyzer is designed to be completely safe when installed and operated correctly in accordance with the information provided in this manual. This manual contains all the required information to install, operate and maintain this product. Prior to installation and use of this product, this entire manual should be read and understood.

  • Page 9: Calibration (Factory Validation)

    Michell Instruments can provide a fully traceable factory calibration service for the analyzer and it is recommended that this is considered at intervals of every year of the analyzer's life.

  • Page 10: Abbreviations

    QMA601 User Manual Abbreviations The following abbreviations are used in this manual: alternating current pressure unit (atmosphere) barg pressure unit (=100 kP or 0.987 atm) gauge °C degrees Celsius °F degrees Fahrenheit European Union Hertz International Electrotechnical Commission kilogram pound lbs/MMscf pounds per million standard cubic foot milliampere...

  • Page 11: Introduction

    NPL and NIST, but an external calibration reference source can also be used if desired. During a calibration cycle, the Data Hold function will prevent any interruption of dependant processes by holding the analog outputs at the same level for the duration of the calibration. Michell Instruments...

  • Page 12: Theory Of Operation

    QMA601 User Manual INTRODUCTION Full Hazardous Area Certification The analyzer is ATEX, IECEx, UKCA and cQPSus certified. The main unit (electronics and sensing) and associated sampling system may be mounted at a convenient location next to the pipeline or process, with gas sample and vent connections. The analyzer is supplied in either a 85-264 V AC version or a 24 V DC version.

  • Page 13: Sample Gas Path

    SAMPLE Desiccant column Moisture generator Mass flow controller V1, V2, V3 V1, V2, V3 Solenoid valves Sensor cell Heat exchanger HE1, HE2 HE1, HE2 Pressure sensor FC1, FC2, FC3 FC1, FC2, FC3 Flow control Figure 1 Measurement System Michell Instruments...

  • Page 14: Installation

    QMA601 User Manual INSTALLATION INSTALLATION Analyzer Storage Instructions In order for this product to be functional upon installation it should be stored in accordance with the guidelines below: • The product must be housed in a sheltered area, out of direct sunlight and rain.

  • Page 15: Unpacking The Analyzer

    Make sure that mounting point design considerations have employed locally approved safety factors. When handling and installing this analyzer (particularly after removal from its packaging) ensure that it is not dropped, impacted or subjected to high levels of vibration or environmental conditions that may impair its operation. Michell Instruments...

  • Page 16: Mounting The Analyzer

    NOR DISCLOSED TO A THIRD PARTY WITHOUT Rev. Date Description Drawn Checked Approved SCALE: DRAWING UNITS: DOCUMENT No.: REQ./PO No.: THE CONSENT OF MICHELL INSTRUMENTS. Enclosure Breather (DO NOT OBSTRUCT) 97mm 67mm 2.6" 3.8" External Earth 4 off M20 Point Threaded Entries 147mm 5.8"...

  • Page 17: Hazardous Area/Location Safety

    Cable glands/barrier glands/conduit seals shall be installed in accordance with the manufacturer’s instructions. Repair and servicing of this equipment must only be carried out by the manufacturer. An Installation and Maintenance Information Sheet is supplied separately to the manual. Michell Instruments...

  • Page 18: Electrical Safety

    Mains 240 V AC 24 V DC 6.3 A A replacement fuse can be obtained by contacting Michell Instruments' technical support. 2.6.1 Equipment Ratings and Installation Details This equipment and all power isolation devices must be installed in a location and position that allows safe and easy access to their operation and is able to rigidly support the equipment.

  • Page 19: Figure 3 Earth Bolt And Nut Washer Assembly

    If installing rigid conduit, a stopping fitting must be installed within 46cm (18") of the enclosure. There are no additional or special electrical safety requirements other than those referred to in this manual. See Appendix A, Technical Specification, for full operating parameters. Michell Instruments...

  • Page 20: Power Connection

    QMA601 User Manual INSTALLATION 2.6.2 Power Connection DANGER Electric Shock Risk The product is provided with 4 x M20 threaded cable gland entries for customer connection. Only these gland entry points may be used. The end user/installer is not permitted to machine additional entries into the enclosure. This equipment must be supplied with a voltage between the range of 85 to 264 V AC, 47/63 Hz (140 W max) or 24 V DC (140 W max) to function correctly.

  • Page 21: Other Electrical Connections

    OP1+ External Pressure – Alarms 3-4 COM4 Analyzer Status Alarm NO in warning/fault condition NC no warning/ no fault COM3 Alarms 1-2 COM2 COM1 Alarm relays: SPDT Form C suitable for signal circuits 24 V DC 1A RS485 Michell Instruments...

  • Page 22: Pressure Safety

    QMA601 User Manual INSTALLATION Pin 1 Pin 8 Figure 6 RJ45 to screw terminal adapter connections Pin Signal Name Description Cable Wire Color TX+_D1 Transmit Data+ White with orange stripe TX-_D1 Transmit Data- Orange with white stripe or solid orange RX+_D2 Receive Data+ White with green stripe...

  • Page 23: Gas Sample Connections

    WARNING: Exd enclosure breather must remain open to atmosphere at all times, without any obstruction - See Figure 2. Michell Instruments' recommendations are: • The sampling point from the process line should be taken from the top of the process line. If a radial probe is used the orifice should face downstream.
  • Page 24 QMA601 User Manual INSTALLATION Prolonged purging, or stripping and cleaning, followed by re-purging with gas may be necessary to remove the contamination. • Avoid sample gas streams that are already very close to the dew point or which have dispersed liquid within them. In such cases, sampling from fast loops and/or from downstream of existing catch pot/coalesce systems is always preferred.

  • Page 25: Operation

    Section 2 and connected to a sample gas supply that is representative of the monitored process. General Operational Information Operation of the QMA601 is completely automated and once set-up requires little or no operator intervention. Michell Instruments...

  • Page 26: First Time Operation

    QMA601 User Manual OPERATION 3.1.1 First Time Operation To commence operation, proceed as follows: Connect the sampling line to the sample system. It is recommended to heat trace the sample gas line. Switch on the power supply to the analyzer. The Initializing Screen will appear.

  • Page 27: Analyzer Set-Up

    Operating the analyzer at a different pressure invalidates the calibration. Similarly, gas pressure affects the output of the internal moisture generator, thereby invalidating further auto calibrations which use a built-in moisture generator as a reference. Michell Instruments...

  • Page 28: User Interface

    QMA601 User Manual OPERATION User Interface The QMA601 features a 7” color display. 3.2.1 Interface Controls Figure 8 User Interface Four capacitive touch keys are used to navigate the menu system. Key presses are detected through the glass front panel, and are indicated by a blue LED above the key.

  • Page 29: Enter' Key

    For non-data entry options pressing the ENTER ENTER key moves to the next available option. 3.2.4 ‘ESC’ Key Figure 11 ‘ESC’ Key key is used to return to the previous menu and is also used to leave keypads without accepting any changes. Michell Instruments...

  • Page 30: Pop Up Keypad

    QMA601 User Manual OPERATION 3.2.5 Pop Up Keypad Allows the user to enter numerical data. The figures below the box indicate the minimum and maximum limits which can be entered. 000.0 0.0 to 300.0 Figure 12 Pop Up Keypad Action Note Moves cursor to last digit.

  • Page 31: Menu Structure

    PARAMETER 1 EXT PRESSURE (BARG) MGF (PPMV) TEMP UNIT PARAMETER 2 HOUR MINUTE MONTH Parameter YEAR 1 & 2 SAVE TIME SAVE DATE TIME DATE INSTRUMENT ID PROTOCOL ADDRESS IP ADDRESS SUBNET MASK DEFAULT GW Figure 13 Menu Structure Michell Instruments...

  • Page 32: Description Of Measured Parameters

    QMA601 User Manual OPERATION Description of Measured Parameters Moisture content ppm parts per million of H O by volume Moisture content ppm parts per million of H O by weight Moisture content mg/m milligrams of H O per cubic meter gas Water Vapor Pressure Pa water vapor pressure in pascals lbs/MMscf pounds of H...

  • Page 33: Table 2 Main Screen Parameters

    If Inst. Mode = Cal Internal/External, Next Mode = Next Measurement Next Mode Next Mode If Inst. Mode = Heating, Next Mode = Oven Temperature Possible States: Time until the next mode or Manual Table 2 Main Screen Parameters Michell Instruments...

  • Page 34: Large Display Mode

    QMA601 User Manual OPERATION 3.5.1 Large Display Mode Parameter 1 & 2 DOWN DOWN To access the large display mode for Parameter 1 and 2, press the key from the Main Screen. Cell Pressure barg Inst. Mode Measure O ppm Next Calibration Manual 2 DP °C...

  • Page 35: Figure 16 Full Screen Graph

    QMA601 User Manual OPERATION Full Screen Graph This page displays a full screen graph of Parameter 1. To access the full screen graph, press the () key from the Main Screen. Figure 16 Full Screen Graph Michell Instruments...

  • Page 36: Main Screen Sub Menus

    QMA601 User Manual OPERATION Main Screen Sub Menus The following sub menus can be accessed from the Main Screen: • Warnings • Logging • Alarms • Field Cal • Settings • Monitor 3.6.1 Warning Screen This page is accessed through the 'Warnings' item on the Main Screen and is used enable or disable the internal alarms.

  • Page 37: Logging Screen

    Figure 18 Logging Screen Parameter Description Log Parameter Log Parameter Parameter to be recorded in the log file Opens a keypad to select the page of logged data to view. Log Page Log Page Table 5 Logging Screen Michell Instruments...

  • Page 38: Alarm Screen

    QMA601 User Manual OPERATION 3.6.3 Alarm Screen This menu allows the internal alarm parameters to be set. It is accessed through the 'Alarms' item on the Main screen. This screen is accessed by pressing the ENTER ENTER key from the Configuration Screen. Navigate between menu items with the () and Down (...

  • Page 39: Field Calibration Screen

    This menu allows the field calibration parameters to be set and activated if necessary. It is accessed through the 'Field Cal' item on the Main screen. Depending upon the field calibration settings some parameters may become inactive. In these cases the inactive parameters are automatically hidden Figure 20 Calibration Screen Michell Instruments...

  • Page 40: Table 7 Calibration Screen Parameters

    QMA601 User Manual OPERATION Parameter Description Calibrate Calibrate Starts a calibration procedure if a manual calibration has been selected. Toggles data hold mode. This determines whether the last valid measurement is held while a calibration is carried out. Analog O/P Analog O/P Available Options: On, Off Hold...

  • Page 41: Figure 21 Field Calibration Screen 2

    The ‘Cal Method’ selection box is also hidden, as shown below: Figure 22 Field Calibration Screen 3 If an automatic calibration is selected then calibration will begin on the time selected using the interval and hour settings. This is done using the onscreen keypad which is opened. Michell Instruments...

  • Page 42: Figure 23 Field Calibration Screen 4

    QMA601 User Manual OPERATION If a manual calibration is selected then both the ‘Interval’ and ‘Hour’ selection boxes are hidden, as shown above. If an automatic calibration is selected then the “Calibrate”, “Cal Source” and “Ext Ref” selection boxes are hidden, as shown below: Figure 23 Field Calibration Screen 4 •...

  • Page 43: Monitor Screen

    Remaining dryer life in %. MG remaining (days) MG remaining (days) Remaining moisture generator life in days. Sensor correction factor set during a calibration cycle. Moisture Generator value. Table 8 Monitor Screen Parameters NOTE: MGV remaining period updates every 10 days. Michell Instruments...

  • Page 44: Settings Menu

    QMA601 User Manual OPERATION Settings Menu The settings menu is accessed through the Settings item on the main screen. Figure 26 Settings Menu Screen Allows access to the following sub menus to change instrument settings. • Measurement • Outputs • •...

  • Page 45: Figure 27 Measurement Screen

    When the External option is chosen it enables the choice of the zero and span range pressure transducer values of 4 or 20mA (see screen shot below). for indication purposes only but can be changed in the "HMI Menu" Pressure Unit Pressure Unit (Section 3.7.3) Table 9 Measurement Screen Michell Instruments...

  • Page 46: Figure 28 Carrier Gas Screen

    QMA601 User Manual OPERATION 3.7.1.1 Carrier Gas Used to select a different carrier gas. When the Carrier Gas option is selected the page shown below is opened. Figure 28 Carrier Gas Screen There are 20 different preset gases the user can choose from, along with 3 user definable presets: •...
  • Page 47 Selects the pressure source. Options are: • Atmos. • Fixed • External If the external option is selected the ‘Fixed’ selection box is hidden and replaced with the ‘Ext. 4mA’ and ‘Ext. 20mA’ selection boxes as shown below: Michell Instruments...

  • Page 48: Figure 30 External Options

    QMA601 User Manual OPERATION Figure 30 External Options If the fixed option is selected the ‘Ext. 4mA’ and ‘Ext. 20mA’ selection boxes are hidden and replaced with the ‘Fixed’ selection box as shown below: Figure 31 Fixed Options If the ‘Atmos.’ option is selected the ‘Fixed’, ‘Ext. 4mA’ and ‘Ext. 20mA’ selection boxes are all hidden as shown below: Figure 32 Atmos.

  • Page 49: Outputs Screen

    ER key. Press the ENTER ENTER key to change the required option. Numerical parameter options activate a pop up keypad. For more information on the keypad see Section 3.2.5. To return to the Configuration Screen press the key. Michell Instruments...

  • Page 50: Figure 34 Outputs Screen

    QMA601 User Manual OPERATION Figure 34 Outputs Screen Parameter Description Selects the output channel to check and modify. Output Output Selector Selector Available Options: Output 1, Output 2 Selects the parameter tracked by the output channel. Parameter Parameter Available Options: H2O ppmv, H2O ppmw, mg/m3, WVP Pa, H2O lbs/ MMscf, DP, Oven, Flow, Cell Pr., Ext.

  • Page 51: Hmi Screen

    ENTER ENTER key to change the required option. Numerical parameter options activate a pop up keypad. For more information on the keypad see Section 3.2.5. To return to the Configuration Screen press the key. Figure 35 HMI Screen Michell Instruments...

  • Page 52: Table 11 Hmi Setup Screen Parameters

    QMA601 User Manual OPERATION Parameter Description Sets the HMI language Language Language Available Options: English, Japanese Selects the time scale of the chart. Changing the chart period will remove all current data from the chart. Chart Period Chart Period Available Options: 5 mins, 30 mins, 1 hr, 5 hrs, 10 hrs, 24 hrs Select the signal smoothing level.

  • Page 53: Real Time Clock Screen

    Sets the current time for the real time clock. Hour / Minute Hour / Minute Saves the updated date. Save Date Save Date Save Time Save Time Saves the updated time. Table 12 Real Time Clock Screen Parameters Michell Instruments...

  • Page 54: Software Communications Screen

    QMA601 User Manual OPERATION 3.7.5 Software Communications Screen The Software Communication screen is used to set the physical method the QMA601 uses to communicate with external software. It is accessed through the 'SW COMMS' item on the Settings menu. Figure 37 Software Communications Screen Parameter Description...

  • Page 55: Field Calibration History

    Table 15 Calibration History Screen 3.7.8 About Screen This screen displays the analyzer firmware versions, serial numbers and protected service pages. This screen is accessed from the settings menu. To return to the Configuration Screen press the key. Michell Instruments...

  • Page 56: Sampling Guidelines

    OPERATION Figure 40 About Screen The service pages are intended for Michell Instruments approved personnel only. They do not contain any user accessible functions. Sampling Guidelines The QMA601 is designed to operate in a flowing gas stream and is suitable for the measurement of the moisture content of a wide variety of gases.
  • Page 57 Michell Instruments supplies a range of precision pressure fittings suitable for use with the QMA601. Contact Michell Instruments for details of the items available.
  • Page 58 Therefore it is recommended to use the smallest possible tube diameter to minimize the previously mentioned effects. This must be balanced with the desired response speed. Depending on the configuration 1/8” tube diameter is recommended. Please contact Michell Instruments if further recommendations are needed. • Ambient temperature variation Fluctuations in ambient temperature conditions can cause detectable changes in the sample gas' moisture content due to heating/cooling of the sample system.

  • Page 59: Measurement Cycle

    Mass flow controller V1, V2, V3 V1, V2, V3 Solenoid Valves Sensor cell HE1, HE2 HE1, HE2 Heat exchanger Pressure sensor Flow control FC1, FC2, FC3 FC1, FC2, FC3 Figure 41 Measurement Cycle (Reference phase) - Dried Sample Flow Michell Instruments...

  • Page 60: Figure 42 Measurement Cycle (Sample Phase) Calibration Flow

    QMA601 User Manual OPERATION After a 30 second sampling period, V1, V2, and V3, the reference phase is de-energized. This cuts off the dried gas supply to the sensor cell and V3 is energized connecting the sample gas (red line - see Figure 42) to the sensor cell for the sample phase duration. The reference and calibration gas paths are shown in green.

  • Page 61: Calibration Cycle

    Mass flow controller Solenoid Valves V1, V2, V3 V1, V2, V3 Sensor cell Heat exchanger HE1, HE2 HE1, HE2 Pressure sensor FC1, FC2, FC3 FC1, FC2, FC3 Flow control Figure 43 Calibration Cycle (Reference phase) - Dried Sample Flow Michell Instruments...

  • Page 62: Figure 44 Calibration Phase - Sample Flow

    QMA601 User Manual OPERATION At the close of this 30 second sampling period, V1 is de-energized, and V2 is energized so that the reference gas from the moisture generator is now routed to the sensor cell. This is the beginning of the calibration phase, see Figure 44. The calibration reference gas is measured for a further 30 seconds, until V2 is de- energized and the reference phase begins again.
  • Page 63 The QMA601 stores this correction factor and automatically compensates subsequent sample readings for any offset that may have occurred to the factory calibration. Michell Instruments...

  • Page 64: Maintenance

    The design of the QMA601 and measurement system is such that no specific routine maintenance is required. However, if a fault does occur with the system that is not covered within this manual please contact Michell Instruments (see contact information at www.ProcessSensing.com) or your local representative.

  • Page 65: Safety

    24 V DC NOTE: Only these types of fuses must be used. Replacement fuses can be obtained by contacting Michell Instruments' technical support. Replacing the Optional Contamination Trap The contamination trap is part of the QMA601 additionally supplied sample system.

  • Page 66: Removal And Replacement Of The Desiccant Column

    QMA601 User Manual MAINTENANCE If the contamination trap is to be returned to Michell Instruments, or a Michell Instruments approved service centre, the F0121 Decontamination Certificate must be completed and sent with the returned trap. Removal and Replacement of the Desiccant Column...
  • Page 67 After installation of the new Desiccant Column the system should be re-pressurized and leak checked. Only the two connection points of the Desiccant Column should need leak checking. A foaming liquid leak detector such as Swagelok's Snoop should be used. Michell Instruments...

  • Page 68: Calibration

    A calibration certificate bearing the calibration data points is issued with each analyzer. If required, an option is available to specify the number of required calibration points by contacting Michell Instruments. A list of Michell Instruments’ w o r l d w i d e offices is provided at www.ProcessSensing.com.

  • Page 69: Shipping

    Place any accessories being returned in the accessories box and place in the crate last. Create a packing list detailing all equipment contained in the crate, place it inside and seal the crate. Michell Instruments...

  • Page 70: Application Software Overview

    QMA601 User Manual APPLICATION SOFTWARE APPLICATION SOFTWARE OVERVIEW With the QMA Application Software you can: • Read and edit all main analyzer parameters • Chart and log all main analyzer parameters • Perform a field calibration • Reset the analyzer to factory defaults Communication between the application software and analyzer is via Modbus RTU over RS485, USB, or Ethernet where available.

  • Page 71: Getting Started

    After a few seconds the software will report a successful connection or not. If the connection is successful, the word 'Connected' and a green tick will appear. Click the 'Continue' button to continue onto the main acquisition window. Michell Instruments...

  • Page 72: Connection Method (Serial Connection (Rs485 Or Tcp)

    QMA601 User Manual APPLICATION SOFTWARE 7.3.1 Connection Method (Serial Connection (RS485 or TCP) Select the connection method for the analyzer. 7.3.1.1 RS485 Connection An RS485 to RS232 converter must be used when connecting to a computer's built in serial port, or when connecting to an RS232 to USB adaptor. To find the COM port number assigned to a USB to RS232 adapter, open Windows 'device manager' and expand the 'Ports (COM &...

  • Page 73: Main Window

    (See section 7.6). To configure analyzer parameters, click the 'Parameters / Field calibration' button to launch the parameters window (See section 7.7). Click the 'Connect' button to re-connect with the analyzer or connect with a new analyzer. Michell Instruments...

  • Page 74: Using The Chart

    QMA601 User Manual APPLICATION SOFTWARE Using the Chart Chart mode buttons The chart defaults to plot mode. To change the chart mode, click one of the buttons along the top of the chart, described below. Function Description Puts chart into live plot mode PLOT PLOT Allows the user to scroll the X-axis left and right...

  • Page 75: Chart Options Window

    (after sizing, zooming or scrolling) Select either 'autoscale all data' or 'manual scaling' of the Y-axis. Y-axis scale Selecting manual scaling will show a min and max input text box Table 17 Chart Options Michell Instruments...

  • Page 76: Data Logging

    QMA601 User Manual APPLICATION SOFTWARE Data Logging Click the 'Data Logging' button on the Main Window to launch the Data Logging Setup Window. Choosing a log file filename Choose a log file manually by clicking the button. Click the 'Auto generate' button to generate a filename based on the current date and time.

  • Page 77: Configuring Logging Stop Time

    Click the 'Apply' button to apply the modified values to the analyzer. To write the PC date and time to the analyzer, first click the 'Get PC date/time' button to load the values into their respective positions on the screen, then click the 'Apply' button. Michell Instruments...

  • Page 78: Field Calibration

    QMA601 User Manual APPLICATION SOFTWARE 7.7.1 Field Calibration This window allows manual analyzer calibrations to be performed, and settings for automatic calibrations configured. These options mirror the options in section 3.6.4. 97449 Issue 5, October 2023...
  • Page 79 QMA601 User Manual APPENDIX A Appendix A Technical Specifications Michell Instruments...

  • Page 80: Appendix A Technical Specification

    Automatic Calibration Internal moisture generator source calibrated traceable to NPL & NIST Sensitivity 0.01 ppm or 1% of reading, whichever is greater Performance: QMA601-LR Measurement Technology Fast Response Quartz Crystal Microbalance 0.02...100 ppm , certified traceable to national humidity standards at...
  • Page 81 Analyzer Gas Connections 1/8” NPT Weight 35kg (77lbs) without sampling system Sample System Enclosure 316L stainless steel Hazardous Area Specifications Certification Codes See Appendix B *Applies only to standard 30-30 second cycle variant. Contact Michell Instruments for further details. Michell Instruments...
  • Page 82 QMA601 User Manual APPENDIX B Appendix B Hazardous Area Certification 97449 Issue 5, October 2023...

  • Page 83: Appendix B Hazardous Area Certification

    AEx db IIB + H2 T6 Gb Ex db IIB + H2 T6 Gb Tamb -20ºC...+55ºC Global Certificates/Approvals ATEX TRAC14ATEX0042X IECEx IECEx TRC14.0016X UKCA EMA21UKEX0001X cQPSus LR1507-4 These certificates can be viewed or downloaded from our website at: www.ProcessSensing.com Michell Instruments...

  • Page 84: Special Conditions Of Use

    Certificates. Maintenance and servicing of the product must only be carried out by suitably trained personnel or returned to an approved Michell Instruments Service Center. 97449 Issue 5, October 2023...
  • Page 85 QMA601 User Manual APPENDIX C Appendix C Modbus Register Map Michell Instruments...

  • Page 86: Appendix C Modbus Holding Register Map

    QMA601 User Manual APPENDIX C Appendix C Modbus Holding Register Map All the data values relating to the QMA601 are stored in holding registers. Each of these registers is two bytes (16-bits wide). Some of these registers contain instrument specific values e.g. its own unique system address, IP address values, etc.
  • Page 87 *Osc Table1 DeltaF 07 Lo Word “ *Osc Table1 DeltaF 08 Hi Word 0.0001 to 2000.0000 *Osc Table1 DeltaF 08 Lo Word “ *Osc Table1 DeltaF 09 Hi Word 0.0001 to 2000.0000 *Osc Table1 DeltaF 09 Lo Word “ Michell Instruments...
  • Page 88 QMA601 User Manual APPENDIX C *Osc Table1 DeltaF 10 Hi Word 0.0001 to 2000.0000 *Osc Table1 DeltaF 10 Lo Word “ *Osc Table1 DeltaF 11 Hi Word 0.0001 to 2000.0000 *Osc Table1 DeltaF 11 Lo Word “ *Osc Table1 DeltaF 12 Hi Word 0.0001 to 2000.0000 *Osc Table1 DeltaF 12 Lo Word “...
  • Page 89 *Osc Table2 Cal Oven SP degC / Cal Date 40 to 80 / 1 to 31 *Osc Table2 Cal Date MMYY 1 to 12 / 0 to 99 *Osc Table2 Cal Sample Phase Time 10 to 240 seconds Michell Instruments...
  • Page 90 QMA601 User Manual APPENDIX C *Osc Table2 Cal Reference Phase Time 10 to 240 seconds *Osc Table2 Cal Settling Cycles 4 to 240 cycles *Osc Table2 Cal Calibration Cycles 4 to 60 cycles *BLANK *Osc Table2 Cal Cell Pressure Reading LoW 0.00 to 10.00 barG 1000 to 15000 (NOT *Osc Table2 Cal Beat Freq of Ref...
  • Page 91 DeltaF Log t6 Hi Word For cal use DeltaF Log t6 Lo Word For cal use DeltaF Log t7 Hi Word For cal use DeltaF Log t7 Lo Word For cal use DeltaF Log t8 Hi Word For cal use Michell Instruments...

  • Page 92: Table 18 Modbus Register Map

    QMA601 User Manual APPENDIX C DeltaF Log t8 Lo Word For cal use DeltaF Log t9 Hi Word For cal use DeltaF Log t9 Lo Word For cal use Log t0 Hi Word For cal use Log t0 Lo Word For cal use Log t1 Hi Word For cal use...
  • Page 93 Reading Values from register manually: If value in register is greater than 32767: (value-65536)/x If vaue in register is less than or equal to 32767: value/x E.g. for type B3: (64997-65536)/100 = -5.39 201/100 = 2.01 Or cast: ((float)((signed short)value))/x; Michell Instruments...
  • Page 94 QMA601 User Manual APPENDIX C Register Configuration C — Modbus Configuration Instrument Address (IA) Protocol Type (PT) 1 to 31 (1=def) 00=RS485 01=USB VCP 10= Ethernet Register Configuration D — System Configuration Temperature/Dew Point units (TU) Pressure for Dew-Point Calculations (PS) 00 = C (def) 00= Atmospheric (def) 01 = F...
  • Page 95 1000 = Cell Pressure 1000 = Cell Pressure 1001 = Ext Line Pressure 1001 = Ext Line Pressure Output Type – (T1 to T2) 0 = 4–20 mA 1 = 1–5V (Where T1 is CH1 and T2 is CH2) Michell Instruments...
  • Page 96 QMA601 User Manual APPENDIX C Register Configuration H — Time (hours/minutes) Hours Number (HH) Minutes Number (MM) 00 to 23 00 to 59 Register Configuration I — 32 bit Precision Floating Point Representation IEEE-754 single precision floating point format. This format is 'Big Ended' which means that the high byte is at a lower address in memory than the Lo byte, and is represented as such in the register memory map.
  • Page 97 A1 = 11= Latched (relay latched but condition now ok) Purge Status (PS) Current Data Hold Status 0=Not purging 0 = Data is currently not held 1=Purging (System in Setup mode and only 1 = Data is currently held REF solenoid is energised) Michell Instruments...
  • Page 98 QMA601 User Manual APPENDIX C Register Configuration M — System Warning Flags (Register 230), Analyzer Status Alarm Relay Selection Mask (Register 9) 1=Warning or fault, 0=OK Warning Condition Oven temperature unstable. Oven temperature has not been 0001 stable within ±0.01C of setpoint for continuous 5 minutes. (Process alarms de-energized, both analog outputs at fault condition) Enclosure temperature too high.
  • Page 99 3 = Set Cell Pressure 20 mA ADC Value* 4 = Set Ext Pressure 4 mA ADC Value* 5 = Set Ext Pressure 20 mA ADC Value* 6 = Send Test String to Sensor Comms Channel* 7 = Send Test String to Display Comms Channel* Michell Instruments...
  • Page 100 QMA601 User Manual APPENDIX C 10 = Force Analog Output 1 to 4 mA** 11 = Force Analog Output 1 to 20 mA** 12 = Force Analog Output 2 to 4 mA** 13 = Force Analog Output 2 to 20 mA** 14 = Force Analog Output 1 to 12 mA** 15 = Force Analog Output 2 to 12 mA** 19 = All Alarm Relays de-energised...
  • Page 101 5 sample Median filter to remove spikes 4-24 = Sample size of filter to smooth signal (default=12) 1=Median of 1 (middle value) 3=Median of 3, averaged (default) < 4 or >24 = OFF Any other value = OFF Michell Instruments...

  • Page 102: Set Points And Ranges

    QMA601 User Manual APPENDIX C Set Points and Ranges Set points and ranges for Analog Outputs, Alarms, Fixed User Pressure, Cell Pressure and External (line) Pressure sensor. Adjustment Unit Default Values Register Range Register Type Range/Res. 0.0 to 3000.0 0.0 to 2000.0 0-30000 A2 (unsigned short/10)

  • Page 103: Gases For Gas Correction Values

    19 = O2 - Oxygen 8 = C4H10 - Butane 20 = XE - Xenon 9 = CO - Carbon Monoxide 21 = UserGas1 10 = CO2 - Carbon Dioxide 22 = UserGas2 11 = H2 - Hydrogen 23 = UserGas3 Michell Instruments...
  • Page 104 QMA601 User Manual APPENDIX D Appendix D Quality, Recycling, Compliance & Warranty Information 97449 Issue 5, October 2023...

  • Page 105: Appendix D Quality, Recycling, Compliance & Warranty Information

    APPENDIX D Appendix D Quality, Recycling, Compliance & Warranty Information Michell Instruments is dedicated to complying to all relevant legislation and directives. Full information can be found on our website at: www.ProcessSensing.com/en-us/compliance This page contains information on the following directives: •...
  • Page 106 QMA601 User Manual APPENDIX E Appendix E Return Document & Decontamination Declaration 97449 Issue 5, October 2023...

  • Page 107: Appendix E Return Document & Decontamination Declaration

    Has the equipment been cleaned and decontaminated? NOT NECESSARY Michell Instruments will not accept instruments that have been exposed to toxins, radio-activity or bio-hazardous materials. For most applications involving solvents, acidic, basic, flammable or toxic gases a simple purge with dry gas (dew point <-30°C) over 24 hours should be sufficient to decontaminate the unit prior to return.
  • Page 108 QMA601 User Manual APPENDIX F Appendix F Calculating Conversion Factors for Gas Mixes 97449 Issue 5, October 2023...

  • Page 109: Appendix F Calculating Conversion Factors For Gas Mixes

    1.019 - Hydrogen 1.422 He - Helium 1.446 Kr - Krypton 1.002 - Nitrogen 1.415 Ne - Neon 0.757 - Ammonia 0.971 NO - Nitrogen Oxide 0.694 O - Nitrous Oxide 0.978 - Oxygen 1.339 XE - Xenon Michell Instruments...
  • Page 110 www.ProcessSensing.com Aufgrund laufender Weiterentwicklungen sind Änderungen der Spezifikationen vorbehalten. Alle Angaben vorbehaltlich Satz- und Druckfehler. nbn Austria GmbH Riesstraße 146, 8010 Graz +43 316 40 28 05 info @ nbn. at | www.nbn.at...

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