Vaisala DPT146 User manual

USER'S GUIDE
Vaisala Dewpoint and Pressure Transmitte
r
DPT146 for Compressed Ai
r
M211372EN-B

PUBLISHED BY
Vaisala Oyj Phone (int.): [phone]
P.O. Box 26 Fax: [phone]
FI-00421 Helsinki
Finland
Visit our Internet pages at www.vaisala.com.
© Vaisala 2011
No part of this manual may be reproduced in any form or by any means, electronic or
mechanical (including photocopying), nor may its contents be communicated to a third
party without prior written permission of the copyright holder.
The contents are subject to change without prior notice.
Please observe that this manual does not create any legally binding obligations for
Vaisala towards the customer or end user. All legally binding commitments and
agreements are included exclusively in the applicable supply contract or Conditions of
Sale.

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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 ............................................................................. 11
License Agreement ................................................................ 11
Warranty.................................................................................. 11
CHAPTER 2
PRODUCT OVERVIEW................................................................................ 13
Introduction to DPT146.......................................................... 13
Basic Features and Options.................................................. 14
Transmitter Structure............................................................. 15
Connection Cables................................................................. 16
Loop-Powered Display (Optional) ........................................ 17
Sampling Accessories (Optional)......................................... 18
CHAPTER 3
FUNCTIONAL DESCRIPTION..................................................................... 19
Sensor Technology ................................................................ 19
MPS1 Multiparameter Sensor............................................. 19
DRYCAP® Technology....................................................... 20
Auto-Calibration ............................................................. 20
Sensor Purge ................................................................. 20
Sensor Warming in High Humidities .............................. 21
BAROCAP® Technology .................................................... 21
DPT146 Startup Sequence .................................................... 22
CHAPTER 4
INSTALLATION............................................................................................ 23
Transmitter Configuration Before Installation .................... 23
Selecting the Location ........................................................... 24
Installing the Transmitter ...................................................... 24
Wiring ...................................................................................... 26

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Sampling from a Process ......................................................27
Sampling Accessories ...........................................................27
DMT242SC Sampling Cell ..................................................27
DMT242SC2 Sampling Cell with Swagelok Connectors.....27
DSC74 Sampling Cell with Quick Connector and
Leak Screw..........................................................................28
DSC74B Two-Pressure Sampling Cell................................29
DSC74C Two-Pressure Sampling Cell with Coil.................31
DM240FA Duct Installation Flange......................................33
CHAPTER 5
OPERATION.................................................................................................35
Transmitter Start-Up...............................................................35
Serial Communication............................................................36
Connecting to the Serial Interface.......................................36
Installing the Driver for the USB Service Cable .............36
Terminal Application Settings..............................................37
List of Serial Commands .......................................................39
Device Information .................................................................40
Show Device Information ....................................................40
Show Currently Active Errors ..............................................41
Show Command List ...........................................................41
Show Firmware Version ......................................................42
Show Serial Number ...........................................................42
Configuring Analog Output ...................................................42
Set Analog Output Mode .....................................................42
Set Analog Output Parameters and Scaling .......................43
Set Analog Output Error Notification ...................................43
Extend Analog Output Range..............................................44
Test Analog Output..............................................................45
Serial Line Output Commands..............................................46
Start Measurement Output..................................................46
Stop Measurement Output ..................................................46
Set Output Interval...............................................................47
Output a Reading Once.......................................................47
Configuring Measurement Parameters ................................48
Set Measurement Output Format........................................48
Select Unit ...........................................................................50
Configuring Serial Line Operation........................................50
Set Serial Line Operating Mode ..........................................50
Set Serial Line Settings .......................................................51
Set Transmitter Address......................................................51
Set Serial Line Response Time...........................................52
Other Commands ...................................................................52
Opening the Transmitter in POLL Mode .............................52
Closing the Connection to a Transmitter in POLL Mode.....53
Show Transmitter Uptime....................................................53
Reset Transmitter................................................................53
Restore Factory Settings.....................................................53
CHAPTER 6
MAINTENANCE............................................................................................55
Periodic Maintenance.............................................................55
Cleaning ..............................................................................55

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Changing the Filter.............................................................. 55
Calibration and Adjustment................................................. 57
Field Check Using an MI70 Indicator .................................. 57
Repair Maintenance ............................................................... 59
CHAPTER 7
TROUBLESHOOTING ................................................................................. 61
Solving Typical Problems ..................................................... 61
Error Messages ...................................................................... 62
Unknown Serial Settings .......................................................62
Technical Support .................................................................. 63
Product Returns ..................................................................... 63
CHAPTER 8
TECHNICAL DATA ...................................................................................... 65
Specifications ......................................................................... 65
Spare Parts and Accessories................................................ 68
Dimensions in mm ................................................................. 69

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List of Figures
Figure 1 DPT146 with ISO G1/2” Thread ...............................................14
Figure 2 DPT146 Transmitter Structure..................................................15
Figure 3 Cable with Threaded Connector...............................................16
Figure 4 USB Service Cable...................................................................16
Figure 5 Nokeval 301 Loop-Powered Display ........................................17
Figure 6 MPS1 Sensor............................................................................19
Figure 7 DPT146 Startup Sequence.......................................................22
Figure 8 Removing the Transport Protection Cap ..................................24
Figure 9 Installing the Transmitter ..........................................................25
Figure 10 Tightening with a Wrench .........................................................25
Figure 11 Connectors I and II ...................................................................26
Figure 12 Connector Pinout......................................................................26
Figure 13 Sampling Cells DMT242SC2 (left) and DMT242SC (right) ......28
Figure 14 DSC74 Sampling Cell with Accessories...................................29
Figure 15 DSC74B....................................................................................30
Figure 16 Removing the Leak Screw........................................................30
Figure 17 Default Assembly of DSC74C ..................................................31
Figure 18 Alternative Assembly of DSC74C (for Tight Spaces)...............32
Figure 19 DM240FA with DPT146............................................................33
Figure 20 PuTTY Terminal Application.....................................................38
Figure 21 Opening the Filter .....................................................................56
Figure 22 Filter Structure ..........................................................................56
Figure 23 Comparing Dewpoint Readings on MI70..................................58
Figure 24 DPT146 Dewpoint Measurement Accuracy .............................66
Figure 25 DPT146 Dimensions.................................................................69
List of Tables
Table 1 Manual Revisions .......................................................................8
Table 2 Related Manuals.........................................................................8
Table 3 Output Parameters of DPT146.................................................13
Table 4 Connector Pinouts ....................................................................26
Table 5 Default Serial Interface Settings...............................................37
Table 6 List of Serial Commands ..........................................................39
Table 7 FORM Command Parameters..................................................49
Table 8 FORM Command Modifiers......................................................49
Table 9 Selection of Output Modes .......................................................50
Table 10 Troubleshooting Table..............................................................61
Table 11 Error Messages ........................................................................62
Table 12 Measured Parameters ..............................................................65
Table 13 Calculated Parameters .............................................................65
Table 14 Performance .............................................................................65
Table 15 Operating Environment.............................................................66
Table 16 Outputs .....................................................................................66
Table 17 General.....................................................................................67
Table 18 DPT146 Spare Parts and Accessories.....................................68

Chapter 1 ________________________________________________________ General Information
VAISALA ________________________________________________________________________ 7
CHAPTER 1
GENERAL INFORMATION
This chapter provides general notes for the manual and the DPT146.
About This Manual
This manual provides information for installing, operating, and
maintaining Vaisala Dewpoint and Pressure Transmitter DPT146 for
Compressed Air.
Contents of This Manual
This manual consists of the following chapters:
- Chapter 1, General Information, provides general notes for the manual
and the DPT146.
- Chapter 2, Product Overview, introduces the features, advantages, and
product options.
- Chapter 3, Functional Description, describes the sensor technology of
the DPT146.
- Chapter 4, Installation, provides you with information that is intended
to help you install the DPT146.
- Chapter 5, Operation, contains information that is needed to operate
the DPT146.
- Chapter 6, Maintenance, provides information that is needed in basic
maintenance of the DPT146.
- Chapter 7, Troubleshooting, describes common problems, their
probable causes and remedies, and provides contact information for
technical support.
- Chapter 8, Technical Data, provides the technical data of the DPT146.

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Version Information
Table 1 Manual Revisions
Manual Code Description
M211372EN-B October 2011. This manual. Updated dewpoint
accuracy graph Figure 24 on page 66. Minor
editorial corrections.
M211372EN-A Previous version.
Related Manuals
Table 2 Related Manuals
Manual Code Manual Name
M211370EN DPT146 Quick Guide
Documentation Conventions
Throughout the manual, important safety considerations are highlighted
as follows:
WARNING Warning alerts you to a serious hazard. If you do not read and follow
instructions very carefully at this point, there is a risk of injury or even
death.
CAUTION Caution warns you of a potential hazard. If you do not read and follow
instructions carefully at this point, the product could be damaged or
important data could be lost.
NOTE Note highlights important information on using the product.

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Safety
The DPT146 delivered to you has been tested for safety and approved as
shipped from the factory. Note the following precautions:
WARNING Ground the product and verify outdoor installation grounding
periodically to minimize shock hazard.
CAUTION Do not modify the unit. Improper modification can damage the product
or lead to malfunction.
CAUTION Do not drop or hit the transmitter. The sensor is fragile and may break
from a sudden shock.
When transporting the transmitter, use the original shipping box from
Vaisala.
ESD Protection
Electrostatic Discharge (ESD) can cause immediate or latent damage to
electronic circuits. Vaisala products are adequately protected against
ESD for their intended use. It is possible to damage the product,
however, by delivering electrostatic discharges when touching,
removing, or inserting any objects inside the equipment housing.
To make sure you are not delivering high static voltages yourself:
- Handle ESD sensitive components on a properly grounded and
protected ESD workbench.
- When an ESD workbench is not available, ground yourself to the
equipment chassis with a wrist strap and a resistive connection cord.
- If you are unable to take either of the above precautions, touch a
conductive part of the equipment chassis with your other hand before
touching ESD sensitive components.
- Always hold component boards by the edges and avoid touching the
component contacts.

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Recycling
Recycle all applicable material.
Dispose of the unit according to statutory regulations. Do not dispose of
with regular household refuse.
Regulatory Compliances
The Vaisala Dewpoint and Pressure Transmitter DPT146 for Compressed
Air is in conformity with the provisions of the following EU directive(s):
- EMC-Directive
Conformity is shown by compliance with the following standards:
- EN 61326-1: Electrical equipment for measurement, control, and
laboratory use – EMC requirements – for use in industrial locations.
- EN 550022: Information technology equipment – Radio disturbance
characteristics – Limits and methods of measurement.
Patent Notice
The Vaisala Dewpoint and Pressure Transmitter DPT146 for Compressed
Air is protected by, for example, the following patents and their
corresponding national rights:
Finnish patent 98861, French patent 6650303, German patent 69418174,
Japanese patent 3585973, UK patent 0665303, and U.S. patent 5607564.