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Ametek 3050 Series User Manual

Moisture analyzer
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Model 3050 Series
Moisture Analyzer
User Manual
Process Instruments
Part Number 305671902, Rev. C
455 Corporate Boulevard
Con igurator Version 2.2
Newark, DE 19702

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Summary of Contents for Ametek 3050 Series

  • Page 1 Model 3050 Series Moisture Analyzer User Manual Process Instruments Part Number 305671902, Rev. C 455 Corporate Boulevard Con igurator Version 2.2 Newark, DE 19702...
  • Page 2 If the instrument or procedures are used for purposes over and above the capabilities speci ied herein, con irmation of their validity and suit- ability should be obtained; otherwise, AMETEK does not guarantee results and assumes no obligation or liability. This publication is not a license to operate under, or a recommendation to infringe upon, any process patents.

  • Page 3: Analyzer Serial Number Location

    Every successful enterprise has as its driving force someone with vision, courage and determination to make it succeed. Within the AMETEK Process Moisture Analysis business, such a person was John Day. Over a period of many years of practical experience working with customers, John became the committed “product champion”...

  • Page 4: Table Of Contents

    Contents Of ices ....................................ii Analyzer Serial Number Location ........................iii Safety Notes ................................vii Electrical Safety ...............................vii Grounding ..................................vii Warning Labels ..............................viii Environmental Information (WEEE) ......................viii Electromagnetic Compatibility (EMC) ......................ix 3050 SLR MOISTURE ANALYZER ...................1 Overview ..................................1 Controller Communication ........................... 3 Veri ication...................................
  • Page 5 Net Weight ................................... 4 INSTALLATION AND START UP ....................3 Unpacking and Inspection ............................1 Sample System Space Requirements ........................ 1 Power Requirements ............................... 1 System Tubing ................................1 Dry Reference Gas ..............................1 Sample Gases ................................2 Sample pressure and temperature requirements ..................2 Mechanical Installation ............................
  • Page 6 Test Alarms ................................15 Test mA Output ............................... 15 REMOTE VERIFICATION ......................5 REPLACEMENT PARTS AND MAINTENANCE ..............6 GLOSSARY OF TERMS ........................7 MODBUS COMMUNICATION INTERFACE ................. A OVERVIEW ................................... 1 ANALYZER MODBUS INTERFACE PARAMETERS ..................3 Modbus Address ................................ 3 Communication Parameters..........................3 MODBUS FUNCTIONS .............................
  • Page 7 Process photometric analyzers, process moisture analyzers, and sampling systems are warranted to perform the in- tended measurement, only in the event that the customer has supplied, and AMETEK has accepted, valid sample stream composition data, process conditions, and electrical area classifi cation prior to order acknowledgment. The photo- metric light sources are warranted for ninety (90) days from date of shipment.

  • Page 8: Safety Notes

    Safety Notes WARNINGS, CAUTIONS, and NOTES contained in this manual emphasize critical instructions as follows: An operating procedure which, if not strictly observed, may result in personal injury or environmental contamination. An operating procedure which, if not strictly observed, may result in damage to the equip- ment.

  • Page 9: Environmental Information (Weee)

    Environmental Information (WEEE) This AMETEK product contains materials that can be reclaimed and recycled. In some cases the prod- uct may contain materials known to be hazardous to the environment or human health. In order to prevent the release of harmful substances into the environment and to conserve our natural resources, AMETEK recommends that you arrange to recycle this product when it reaches its “end of life.”...
  • Page 10 Read and follow the recommendations in this section to avoid performance varia- tions or damage to the internal circuits of this equipment when installed in harsh electrical environments. The various con igurations of the 3050 should not produce, or fall victim to, electromagnetic distur- bances as speci ied in the European Union’s EMC Directive.
  • Page 11 SPECIAL WARNINGS AND INFORMATION FOR USE OF THIS EQUIPMENT IN DIVISION 1 OR ZONE 1 HAZARDOUS LOCATIONS The Standard Equipment is rated: Ex II 2G Ex db eb IIB +H2 T* Gb IP65 T6: -20°C to 40°C or T5: -20°C to 50°C and should only be installed in appropriate classi ied hazardous areas.
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  • Page 13: 3050 Slr Moisture Analyzer

    3050 SLR MOISTURE ANALYZER Overview The 3050 Moisture Analyzer is a smart sensor that measures trace concentrations of mois- ture in a process gas stream. At the heart of the 3050-SLR Analyzer is a 3050-OLV, which has been modi ied for operation at moisture concentrations below 100 ppbv. The 3050 is compatible with He, Ar, Ne, Xe, Kr, O , NO, CO, CO , light hydrocarbons, natural gas,...

  • Page 14: Controller Communication

    sample gas and a dry reference gas. A dry reference gas is produced by passing a portion of the sample gas through a dryer to remove any moisture present (i.e. - the moisture content of the dry reference is less than 0.010 ppmv). The difference in the resonant frequency of the QCM sensor, as measured when exposed to each of the two gas streams, is a function of the moisture content of the sample gas.

  • Page 15: Veri Ication

    All analyzer functions are controlled by a microprocessor housed within the smart sensor. Communication with the smart sensor is achieved through the following connections: • One analog input, 4 to 20 mA • One analog output, 4 to 20 mA, isolated. Can be either loop powered or powered by the analyzer.

  • Page 16: Calculation Of Dewpoint Values For Hydrocarbon Streams

    Bulletin #8) and the new European standard (ISO 18453, which is based on the work pre- sented in GERG-Water Correlation: GERG Technical Monograph TM14, 2001), AMETEK has provided a means of using either method in the 3050 SLR product. Speci ically, in the gas list we have cited two separate entries for natural gas.
  • Page 17 : oxygen carbon dioxide hydrogen nitrogen helium neon argon krypton xenon methane ethane propane butane ethene (ethylene) natural gas Freon R12 Freon R22 Freon R114 Carbon Dioxide  Contact AMETEK Service with inquiries regarding other applications. NOTE Overview | 1-5...
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  • Page 19: Specifications

    SPECIFICATIONS Operating Environment -20 °C to 50 °C (-4 °F to 122 °F) (Ambient temperature; Enclosed sample system) 90% RH maximum, noncondensing IEC Pollution Degree 2 IEC Installation Category II Maximum elevation 2,000 meters (6560 feet) Indoor/outdoor use Approvals and Certi ications UL/CSA General Safety Requirements UL/CSA Class I, Division 1, Groups BCD T6 Electromagnetic Compatibility Directive;...

  • Page 20: Ranges

    Ranges 0.10 to 100 parts per million by volume (ppmv) Readings can also be displayed in units of ppmw, lb/mmscf, and mg/Nm Outputs Data: Isolated 4 to 20 mA, 100 to 500Ω Analog output (software con igurable) RS-232 or RS-485 serial port, two and four wire mode Alarms/Alerts Two independent hermetically sealed reed type contact closures 60 VDC, 30 VAC, 10 VA...

  • Page 21: Instrument Air Requirements

    Instrument Air Requirements 5 to 7 bar (70 to 100 psig) Back Pressure Regulator Requirements (if purchased) 0 to 1 bar (0 to 15 psig) Maximum Sample Inlet Pressure Requirement 138 kPa to 345 kPa (20 psig to 50 psig ) Maximum (Pressure reduction provided by user.) Exhaust Pressure 0 to 1 bar (0 to 15 psi) gauge.

  • Page 22: Power Requirements

    Power Requirements 115 +/-10% Vac, 50/60 Hz, 150W max. 230 +/-10% Vac, 50/60 Hz, 150W max. 24 VDC, 50W max Minimum PC Requirements for Software Pentium 100 32 MB RAM for Windows XP Dimensions Width: 460 mm 46 cm (18.11 inches) Height: 810 mm 81 cm (31.89 inches)
  • Page 23 Analyzer Markings The Model 3050-SLR Analyzer will be marked with a corresponding ATEX/IECEx label to indicate its ATEX/IECEx certi ication. Label Color: Red. Figure 2-1. CERTIFICATION: 3050 Analyzer Label DRAWING NUMBER 305483000 Figure 2-2. 3050 Warning Label Speci ications | 2-5...
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  • Page 25: Installation And Start Up

    A dryer (AMETEK Dryer PN 305400901S or equivalent) is required to dry reference gas to less than 0.025 ppmv. A dryer (AMETEK Dryer PN 305617901S or equivalent) is required to dry the gas to less than 0.01 ppmv for zeroing the 3050-SLR.

  • Page 26: Sample Gases

    If the 3050 analyzer is being used on a clean gas stream (i.e. - free from particulates and aerosols), AMETEK Process Instruments recom- mends that the analyzer be installed in accordance with the information provided in the following Sections of this manual.
  • Page 27 Figure 3-1b: SLR Sample system low diagram Installation & Start-Up | 3-3...

  • Page 28: Mechanical Installation

    Mechanical Installation Locate the 3050 system as close as possible to the sample source. The unit should be pro- tected from direct exposure to weather and sunlight; and located so that the ambient tem- perature speci ications will not be exceeded. 1.

  • Page 29: Electrical Connections

    Figure 3-2a. Threaded Enclosure Analyzer Arrangement Electrical Connections Power Signal Junction Boxes 1. Access terminal in power signal Junction Box. 2. Connect the 4 to 20 mA analog output and alarm contacts from the ter- minal block to user recording equipment. 3.
  • Page 30 Figure 3-2b. Flanged Enclosure Analyzer Arrangement 3-6 | 3050-SLR Moisture Analyzer...
  • Page 31 Figure 3-3a. Threaded Enclosure Analyzer Arrangement The unit is intended to be mounted on a horizontal surface or on a verticle surface  with a junction box. Contact Ametek for custom orientations. NOTE Installation & Start-Up | 3-7...
  • Page 32 Figure 3-3b. Flanged Enclosure Installation Dimensions The unit is intended to be mounted on a horizontal surface or on a verticle surface  with a junction box. Contact Ametek for custom orientations. NOTE 3-8 | 3050-SLR Moisture Analyzer...
  • Page 33 Figure 3-4. Typical Probe Installation Figure 3-5. Optional heated pressure reduction low Installation & Start-Up | 3-9...
  • Page 34 Figure 3-6. Optional heated pressure reduction Installation 3-10 | 3050-SLR Moisture Analyzer...

  • Page 35: Analyzer Start-Up

    Electrical Connections Power Signal Junction Boxes 1. Access terminal in power signal Junction Box. 2. Connect the 4 to 20 mA analog output and alarm contacts from the ter- minal block to user recording equipment. 3. Connect serial communication from analyzer to the PC being used for customer parameter setup.

  • Page 36: Interconnect Wiring

    Figure 3-11. Interconnect Wiring 3-12 | 3050-SLR Moisture Analyzer...

  • Page 37: 4-20 Ma Output Wiring

    0.1mF @ 500V capacitor. 3. The 3050 analyzer signal common is connected to earth ground. If the analog output is also grounded, the analog output will no longer be electrically isolated. Contact AMETEK if this situation occurs. The 4-20 mA loop circuit must have a load resistance of between 100 and 500 ohms or malfunction may occur.

  • Page 38: Rs232 Wiring

    Figure 3-13. RS-232 Wiring 3-14 | 3050-SLR Moisture Analyzer...

  • Page 39: Rs485 Cables

    Figure 3-14. RS-485 Cables, Multiple 3050’s Notes: 1. Total cable length not to exceed 1000m. Cable should be low capacitance type for use in RS-485 applications (nominal impedance of 120 ohms, shielded twisted pairs). For example, Belden 9841 in two wire applications, Belden 9842 in four wire applications. 2.
  • Page 40 Figure 3-15. RS-485 to RS-232 Conversion for Host PC Notes: 1. Converter and Power Supply are not suitable for use in hazardous areas. 2. Refer to chapter 6 for replacement part numbers. 3-16 | 3050-SLR Moisture Analyzer...

  • Page 41: Status Leds And Alarms

    Dry Down Period Allow a minimum of two hours for the analyzer to dry down and stabilize. For sample systems, allow a minimum of three days. System alarms are normal during this period. When dry down is com- plete, cell frequency will be stable and the recorded data will have leveled off.
  • Page 42 This will occur during Oven Temperature* Oven temperature is out of start-up until the oven tolerance. warms up. Call AMETEK Service if problem persists. Flow Out of Tolerance* Sample fl ow rate too high or Check inlet and outlet too low pressure.

  • Page 43: User Interface

    When you get to the Setup Complete screen, click Finish to complete the installation. The default location for the 3050 software is in the AMETEK folder. Con iguration installation disk 2 may not be requested depending on prior con igu- ...

  • Page 44: Con Iguring The 3050

    Con iguring the 3050 This section provides instructions for setting up your operating parameters using the Con igurator software. With Version 2.0, the “Setup Button” must be pushed and the setup screen accepted before communications begin. General Tab Use the General tab to view the current con iguration and de ine parameters for the ana- lyzer and for PC communications (Figure 4-1).

  • Page 45: Communication Protocol

    Once communications with the analyzer are established, the Modbus serial can be selected if desired.  When changing from AMETEK Serial to Modbus Serial, the analyzer communica- tions parameters must be changed before the computer serial port settings. NOTE Port Select the COM port on your computer where the connection to the analyzer is installed.

  • Page 46: Live Data

    Live Data Checked The system connects to and uses live data from the analyzer. Not checked The system uses demonstration data. Status Indicates if the analyzer is on-line, off-line, or in demo mode. On-Line The PC and analyzer are connected and communicating prop- erly.

  • Page 47: Con Iguring Multiple Analyzers

    Baud Rate Select the baud rate at which data will be transferred. Address Identi ies the analyzer’s address. Type the network address for the analyzer being connect- Figure 4-3a. Device Communications setup screen for AMETEK Serial. User Interface | 4-5...
  • Page 48 Figure 4-3b. Device Communications setup screen for Modbus Serial. RS-485 Identi ies the analyzer’s type of serial communication cable that is being used. Two-Wire RS-485 Click if you are using a 2-wire cable. Four-Wire RS-485 Click if you are using a 4-wire cable. Parity and Stop Bits For Modbus serial communications select the Parity and Stop Bits parameters for your ana- lyzer.

  • Page 49: Setup Tab

    It will take a few seconds to establish communication and display Online in the Status ield on the General Tab.  If communitcation is lost, recycle power on the analyzer and click Setup on the General Tab to change the PC Communications. NOTE Setup Tab Use the Setup tab to de ine analyzer parameters.

  • Page 50: Sensor Saver Check Box

    Sensor Saver check box Check this box to enable Sensor Saver. Checked Analyzer operates with a slow cycle time, maximizing cell life at the expense of system response time. Figure 4-5. Setup tab. Not Checked Analyzer operates with a rapid cycle time, minimizing system response time.

  • Page 51: Set Clock

    To Save settings on the Setup tab, click Apply. Veri ication Tab Use the Veri ication tab to schedule routine Zero. Verify Now Button Click to begin veri ication cycle now. Abort Button Click to terminate veri ication or zero. Zero Now Button Click to begin zero cycle now.

  • Page 52: Set Dryer Production Code

    Set Dryer Production Code Click to enter the Dryer Production Code for the dryer that is installed in the analyzer. Click OK to accept.  You must enter a new dryer code each time you replace the dryer. NOTE Set Moisture Generator Production Code Click to enter the Moisture Generator Production Code.

  • Page 53: Scheduled Zero

    Figure 4-8. Dryer and Moisture Generator code entry screens. Weekly Select the day of the week from the drop-down list under Day of the week at the bottom of the box. You must also enter a time of day (1 through 24) in the Hour slot to begin the zero cycle.
  • Page 54 Status Tab Use the Status tab to view current readings and the status of the analyzer. Figure 4-9. Status tab. Monitor Tab Use the Monitor tab to check on analyzer operation. From this tab you can also calibrate the internal low meter and test the alarm contacts and mA output of the analyzer. Figure 4-10.
  • Page 55 Data Capture The data capture feature allows the user to collect and save analyzer data displayed on the Monitor screen to an Excel compatible ile. Press the ON button to start data collection. Specify the ile name in the “Save As” dialog and press “Save”...

  • Page 56: Flow Adjust

    Flow Adjust Flow Adjust is a utility designed to calibrate the internal low meter inside the 3050 ana- lyzer. In order to calibrate the low meter, an external low meter is needed to compare the low reading on the analyzer with the actual low. Gas Factor Check Gas Factor if you run gas mixtures.

  • Page 57: Test Alarms

    nal low meter matches the external low meter. When calibration is complete press OK, to return to the Monitor tab. Figure 4-11b. Flow Adjust Screen. Test Alarms The Test Alarms push buttons allow you to toggle the alarm contacts to an opened or closed state.
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  • Page 59: Remote Verification

    REMOTE VERIFICATION The analyzer can be commanded to initiate Zero and Verify functions remotely via a 4-20 milliamp input into terminals 1 (+) and 2 (-) of TB3 (See Figure 3-11). The table below de- scribes the analyzer response to a current input. Input Analyzer Response 0 mA to 7.9 mA...
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  • Page 61: Replacement Parts And Maintenance

    SPARE PARTS AND MAINTENANCE Table 6.1 lists the replacement parts available for the Model 3050 Moisture Analyzer. Please contact the Ametek Sales of ice (302-456-4400) for pricing and ordering information. Table 6.1: Model 3050 Replacement Parts AMETEK Part Description Part Number...
  • Page 62 ?? ANSWERS TO YOUR QUESTIONS ?? The choice is yours... MINUTES OR HOURS, ANYTIME / ANYWHERE WE’RE THERE FOR YOU AMETEK SERVICE & AFTERMARKET SALES SUPPORT • PRE-lNSTALLATlON INSPECTIONS • ASAP • START UPS • AFTERMARKET SALES • WARRANTY VALIDATION •...

  • Page 63: Glossary Of Terms

    GLOSSARY OF TERMS Annunciator Display A graphical representation of a panel annunciator on which alarm status of 3050 results are displayed. Address A decimal number that must be assigned to a Model 3050, when the host PC is communicating with multiple Model 3050 Moisture Analyzers.
  • Page 64 Data Valid Relay contact, which opens to indicate a veri ication is in pro- cess or an alarm condition. The data valid contact opens on all alarms and stays closed during normal functions and readings. Device A single 3050 Moisture Analyzer, or an addressable I/O device, such as an Optomux module.
  • Page 65 ppmv Parts per million by volume ppmw Parts per million by weight Process Pressure The pressure of the process gas, expressed in one of various possible units. Only required when engineering units of “dew- point” are selected. Resonance Frequency The frequency at which the QCM operates. RS-232 A serial communication protocol, in which the RS-232 serial output of a Model 3050 Analyzer may be directly connected to...
  • Page 66 Trend Display A line plot of 3050 analyzer results with respect to time. Two-Wire Mode RS-485 communication mode, in which only two wires are used, connected to the “Send Data” and “Receive Data” termi- nals. Simultaneous bi-directional communications are not pos- sible using two-wire mode.

  • Page 67: Modbus Communication Interface

    Chapter 3. The variable called SerialMode allows switching communication protocol from AMETEK ASCII to MODBUS protocol and back from MODBUS to AMETEK ASCII. This variable can be reached from AMETEK ASCII protocol by ID=38(26Hex) and SerialMode can be modi ied by modifying holding register #28(4029), as indicated in the holding registers table.
  • Page 68 Power should be recycled or a reset command should be issued to activate the change in the serial mode setting. It is strongly recommended to con igure and to test 3050 analyzer in AMETEK ASCII mode using user-friendly 3050 Con igurator software. The MODBUS RTU protocol mode should be used for monitoring purposes.

  • Page 69: Analyzer Modbus Interface Parameters

    ANALYZER MODBUS INTERFACE PARAMETERS A number of analyzer Modbus interface parameters need to be set up in order to establish communication with the Modbus master. These parameters are accessed via the service port on the analyzer using a service program running on a PC. Modbus Address The analyzer needs to be assigned a Modbus slave address, which can be a number from 1 to 247 with 0 interpreted as a broadcast address (Meaning that analyzer will execute the com-...

  • Page 70: Modbus Functions

    MODBUS FUNCTIONS As the Modbus protocol is designed for communication among Programmable Logic Con- trollers (PLCs), not all Modbus function codes supported by a slave PLC are applicable to the Model 3050 analyzer. Only the following relevant function codes are implemented: CODE DESCRIPTION Read multiple holding registers (4x references)

  • Page 71: Holding Registers

    HOLDING REGISTERS Since the RAM space on the analyzers is limited and not every customer’s DCS\SCADA\DAS\ PLC supports Modbus loating point value transfer, loating point values that are commonly accessed on a Model 3050 analyzer are scaled and converted into integer values to load into Modbus registers for transmission.
  • Page 72 TABLE: MODBUS HOLDING REGISTERS TABLE A-1 DEFINITION UNITS SCALING ACCESS Current moisture concentration (Moisture= 51 Hex) Concentration held during verification units (HeldConc= 52 Hex) Sensor frequency (Frequency= 53 Hex) Delta frequency (DeltaFrequency= 54 Hex) Flow reading (Flow= 55 Hex) sccm Sensor pressure (Pressure1= 4B Hex) Electronics temperature (EETemp= 4C Hex) Sensor temperature (CellTemp= 4d Hex)
  • Page 73 TABLE A-1 cont. DEFINITION UNITS SCALING ACCESS Serial comunication mode (SerialMode= 26 Hex) Slave address (NodeAddress= 27 Hex) Baud rate (Baud= 25 Hex) Modbus protocol setting (ParityAndStop= 92 Hex) Counts to voltage coefficient (AD16Offset= 01 Hex) Sensor assembly setting (RefPeriod= 04Hex) Sensor assembly setting (SmplPeriod= 05 Hex) Sensor temperature coefficient (CellTempSpan = 06 Hex)
  • Page 74 TABLE A-1 cont. DEFINITION UNITS SCALING ACCESS Flow control parameter (uMinLoop1= 1C Hex) Heater control parameter (proBandLoop2= 1D Hex) Heater control parameter (TsLoop2= 1E Hex) Heater control parameter (TiLoop2= 1F Hex) Heater control parameter (SetPointLoop2= 20 Hex) Heater control parameter (ActuatorLoop2= 21 Hex) Heater control parameter (uMaxLoop2= 22 Hex) Heater control parameter (uMinLoop2= 23 Hex Gas based coefficient (PpmW= 24 Hex)
  • Page 75 TABLE A-1 cont. DEFINITION UNITS SCALING ACCESS Read only except test mode (AnalogInput= 4E Hex) Read only except test mode (AnalogOutput= 4F Hex Used in test mode (ReadTestFixture= 50 Hex) Sample = 0,generator = 1,reference = 2 (ValveState= 56 Hex) Current hour (Hour= 57 Hex) hour Current minute (Minute= 58 Hex)
  • Page 76 TABLE A-1 cont. DEFINITION UNITS SCALING ACCESS 113-114 Converts input counts to voltage float (AD16Span= 00 Hex) 115-116 Dew point temperature conversion coefficient float (DewCoeff0= 14 Hex) 117-118 Dew point temperature conversion coefficient float (DewCoeff1= 15 Hex) 119-120 Dew point temperature conversion coefficient float (DewCoeff2= 42 Hex) 121-122 Dew point temperature conversion coefficient...
  • Page 77 TABLE A-1 cont. DEFINITION UNITS SCALING ACCESS 183-189 Analyzer serial number (SerialNumber= 44 Hex) string 190-196 Sensor serial number (CellSerialNumber= 45 Hex) string 197-203 Moisture generator serial number string (MoistureGeneratorSN= 46 Hex) 204-209 Current date string (Date= 5D Hex) string 210-212 Current time string (Time= 5E Hex) string 213-220 Analyzer model name (ModelName= 77 Hex)

  • Page 78: Id/Status Information

    DEFINITION UNITS SCALING ACCESS ZeroWeekDays (ZeroWeekDays = 84) ZeroType (ZeroType = 85) MaxZeroError (MaxZeroError = 86) MaxZeroDrift (MaxZeroDrift = 87) MoistureSpanSlow (MoistureSpanSlow = 88) 1000 FreqOffsetSlow (FreqOffsetSlow = 89) 1000 The last set of registers starting from #141 represents ASCII strings. Each register is holding two ASCII characters.
  • Page 79 3050 Con igurator software for con iguring the analyser. The 3050 con igurator software is also compatible with MODBUS RTU. Switching protocols can be accomplished with the 3050 Con igurator software or with the AMETEK “ProtocolS- witch” utility, which is discussed in the next section.

  • Page 80: Example 1: Alarm Enable

    All of the con iguration parameters of the analyser can be modi ied by the “write one or multiple holding registers” command. In most cases it is a one step operation involving set- ting the contents of the corresponding register. Ten different examples of using this com- mand are presented below.

  • Page 81: Example 2: Setting The High-Alarm Limit

    Example 2: Setting the High-Alarm Limit: TASK. Set the analyser to produce a “high-concentration” alarm, when the moisture concentration exceeds 1000 ppm. ACTION. Write one holding register (function 06). Register address = 66 (holding register #40067). Value = 1000. Example 3: Setting the Low-Alarm Limit: TASK.

  • Page 82: Example 6: Setting The Low-End Of The Analog Output

    Example 6: Setting the Low-End of the Analog Output: TASK. Setup the analog output so that a moisture concentration of 1ppm produces a 4 ma current output. ACTION. Write one holding register (function 06). Register address = 46 (holding register #40047). Value = 100 (multiplied by scale of 100).

  • Page 83: Example 9: Selecting A Sample Gas

    Example 9: Selecting a Sample Gas: TASK. Set the analyser to operate on a sample gas, using the data provided in the “GasNew.csv” ile (located on the customer con iguration disk). For the purpose of this example, the sample gas selected will be air. ACTION 1.
  • Page 84 ACTION 2. Set the day of the Month to 3. Write one holding register (function 06). Register address = 79 (holding register #40080) value = 3Hex. ACTION 3. Set the hour 12. Write one holding register (function 06). Register address = 77 (holding register #40078) value =0CHex.
  • Page 85 Modbus Communication Interface | A-19...
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