Vaisala Dewpoint and Pressure Transmitter DPT146 for ... S GUIDE Vaisala Dewpoint and Pressure Transmitter DPT146 for Compressed Air M211372EN-D

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  • USER'S GUIDE

    Vaisala Dewpoint and Pressure Transmitter DPT146 for Compressed Air

    M211372EN-D

  • PUBLISHED BY

    Vaisala Oyj Street address: Vanha Nurmijrventie 21, FI-01670 Vantaa, Finland Mailing address: P.O. Box 26, FI-00421 Helsinki, Finland Phone: +358 9 8949 1 Fax: +358 9 8949 2227

    Visit our Internet pages at www.vaisala.com.

    Vaisala 2014

    No part of this manual may be reproduced, published or publicly displayed in any form or by any means, electronic or mechanical (including photocopying), nor may its contents be modified, translated, adapted, sold or disclosed to a third party without prior written permission of the copyright holder. Translated manuals and translated portions of multilingual documents are based on the original English versions. In ambiguous cases, the English versions are applicable, not the translations.

    The contents of this manual are subject to change without prior notice.

    This manual does not create any legally binding obligations for Vaisala towards customers or end users. All legally binding obligations and agreements are included exclusively in the applicable supply contract or the General Conditions of Sale and General Conditions of Service of Vaisala.

    http://www.vaisala.com/

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    VAISALA _________________________________________________________________________ 1

    Table of Contents

    CHAPTER 1 GENERAL INFORMATION ............................................................................ 7

    About This Manual ................................................................... 7 Contents of This Manual ....................................................... 7 Version Information ............................................................... 8 Related Manuals ................................................................... 8 Documentation Conventions ................................................. 8

    Safety ......................................................................................... 9 ESD Protection ...................................................................... 9

    Recycling ................................................................................ 10 Regulatory Compliances ....................................................... 10 Patent Notice .......................................................................... 10 Trademarks ............................................................................. 10 Software License .................................................................... 11 Warranty .................................................................................. 11

    CHAPTER 2 PRODUCT OVERVIEW ................................................................................ 12

    Introduction to DPT146 .......................................................... 12 Basic Features and Options .................................................. 12 Transmitter Structure ............................................................. 14 Connection Cables ................................................................. 15 Loop-Powered Display (Optional) ........................................ 16 Sampling Accessories (Optional) ......................................... 16

    CHAPTER 3 FUNCTIONAL DESCRIPTION ..................................................................... 17

    Sensor Technology ................................................................ 17 MPS1 Multiparameter Sensor ............................................. 17 DRYCAP Technology ....................................................... 18

    Auto-Calibration ............................................................. 18 Sensor Purge ................................................................. 18 Sensor Warming in High Humidities .............................. 18

    BAROCAP Technology .................................................... 19 DPT146 Startup Sequence..................................................... 20

    CHAPTER 4 INSTALLATION ............................................................................................ 21

    Transmitter Configuration Before Installation .................... 21 Selecting the Location ........................................................... 21 Installing the Transmitter ...................................................... 22 Wiring ...................................................................................... 24 Sampling from a Process ...................................................... 25

  • User's Guide _______________________________________________________________________

    2 ____________________________________________________________________ M211372EN-D

    Sampling Accessories ........................................................... 25 DMT242SC Sampling Cell .................................................. 25 DMT242SC2 Sampling Cell with Swagelok Connectors ..... 25 DSC74 Sampling Cell with Quick Connector and Leak Screw ................................................................................... 26 DSC74B Two-Pressure Sampling Cell ................................ 27 DSC74C Two-Pressure Sampling Cell with Coil ................. 29 DM240FA Duct Installation Flange ...................................... 31

    CHAPTER 5 OPERATION ................................................................................................. 32

    Transmitter Start-Up ............................................................... 32 Serial Communication ............................................................ 33

    Connecting to the Serial Interface ....................................... 33 Installing the Driver for the USB Service Cable ............. 33

    Terminal Application Settings .............................................. 34 List of Serial Commands ....................................................... 36 Device Information ................................................................. 37

    Show Device Information..................................................... 37 Show Currently Active Errors .............................................. 38 Show Command List ........................................................... 38 Show Firmware Version ...................................................... 39 Show Serial Number ............................................................ 39

    Configuring Analog Output ................................................... 39 Set Analog Output Mode ..................................................... 39 Set Analog Output Parameters and Scaling........................ 40 Set Analog Output Error Notification ................................... 40 Extend Analog Output Range .............................................. 41 Test Analog Output .............................................................. 42

    Serial Line Output Commands .............................................. 42 Start Measurement Output .................................................. 42 Stop Measurement Output .................................................. 43 Set Output Interval ............................................................... 43 Output a Reading Once ....................................................... 44

    Configuring Measurement Parameters ................................ 45 Set Measurement Output Format ........................................ 45 Select Unit ........................................................................... 47

    Configuring Serial Line Operation ........................................ 47 Set Serial Line Operating Mode .......................................... 47 Set Serial Line Settings ....................................................... 48 Set Transmitter Address ...................................................... 48 Set Serial Line Response Time ........................................... 49

    Other Commands.................................................................... 49 Opening the Transmitter in POLL Mode.............................. 49 Closing the Connection to a Transmitter in POLL Mode ..... 50 Show Transmitter Uptime .................................................... 50 Reset Transmitter ................................................................ 50 Restore Factory Settings ..................................................... 50

    Modbus Communication ........................................................ 51 Addressing with Modbus Protocol ....................................... 51

    Accessing Serial Port Command Interface from Modbus Mode ................................................................. 51 Configuration Commands Related to Modbus ............... 52

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    VAISALA _________________________________________________________________________ 3

    CHAPTER 6 MAINTENANCE ........................................................................................... 53

    Periodic Maintenance ............................................................ 53 Cleaning .............................................................................. 53 Changing the Filter .............................................................. 53 Calibration and Adjustment ................................................. 55 Field Check Using an MI70 Indicator .................................. 55

    Repair Maintenance ............................................................... 57

    CHAPTER 7 TROUBLESHOOTING ................................................................................. 58

    Solving Typical Problems...........