Vaisala DPT145 User manual

USER'S GUIDE
Vaisala Multiparameter Transmitte
r
DPT145 for SF6Gas
M211371EN-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.................................................................... 10
Recycling ................................................................................ 10
Regulatory Compliances ....................................................... 11
Patent Notice .......................................................................... 11
Trademarks ............................................................................. 11
License Agreement ................................................................ 11
Warranty.................................................................................. 12
CHAPTER 2
PRODUCT OVERVIEW................................................................................ 13
Introduction to DPT145.......................................................... 13
Basic Features and Options.................................................. 14
Transmitter Parts.................................................................... 15
Weather Shield ....................................................................... 16
CHAPTER 3
FUNCTIONAL DESCRIPTION..................................................................... 17
Measurement Needs of SF6Insulation................................. 17
Sensor Technology ................................................................ 18
MPS1 Multiparameter Sensor............................................. 18
DRYCAP® Technology....................................................... 18
Auto-Calibration ............................................................. 19
Sensor Purge ................................................................. 19
BAROCAP® Technology .................................................... 19
DPT145 Startup Sequence .................................................... 20
CHAPTER 4
INSTALLATION............................................................................................ 21
Transmitter Configuration Before Installation .................... 21
Selecting the Location........................................................... 22
Warning – Read Before Installation...................................... 23
Installation Without Weather Shield..................................... 24
Installation With Weather Shield .......................................... 25
Wiring ...................................................................................... 28

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Standard Wiring...................................................................28
Alternate Wiring for Power Supply ......................................29
Stabilization of Dewpoint Reading After Installation..........29
CHAPTER 5
OPERATION.................................................................................................31
Transmitter Start-Up...............................................................31
Serial Communication............................................................32
Connecting to the Serial Interface.......................................32
Installing the Driver for the USB Service Cable .............32
Terminal Application Settings..............................................33
List of Serial Commands .......................................................35
Device Information .................................................................36
Show Device Information ....................................................36
Show Currently Active Errors ..............................................37
Show Command List ...........................................................37
Show Firmware Version ......................................................38
Show Serial Number ...........................................................38
Serial Line Output Commands..............................................38
Start Measurement Output..................................................38
Stop Measurement Output ..................................................39
Set Output Interval ..............................................................39
Output a Reading Once.......................................................40
Configuring Measurement Parameters ................................40
Set Mixing Ratio ..................................................................40
Set Molar Weight of Other Gas ...........................................41
Set Pressure Normalization Temperature...........................41
Set Measurement Output Format........................................42
Select Unit ...........................................................................44
Configuring Serial Line Operation........................................44
Set Serial Line Operating Mode ..........................................44
Set Serial Line Settings .......................................................45
Set Transmitter Address......................................................45
Set Serial Line Response Time...........................................46
Other Commands ...................................................................46
Opening the Transmitter in POLL Mode .............................46
Closing the Connection to a Transmitter in POLL Mode.....47
Show Transmitter Uptime....................................................47
Reset Transmitter................................................................47
Restore Factory Settings.....................................................47
CHAPTER 6
MAINTENANCE............................................................................................49
Periodic Maintenance.............................................................49
Cleaning ..............................................................................49
Calibration and Adjustment .................................................49
Field Check Using an MI70 Indicator ..................................50
Repair Maintenance................................................................52

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CHAPTER 7
TROUBLESHOOTING ................................................................................. 53
Solving Typical Problems ..................................................... 53
Error Messages ...................................................................... 54
Unknown Serial Settings .......................................................54
Technical Support .................................................................. 55
Product Returns ..................................................................... 55
CHAPTER 8
TECHNICAL DATA ...................................................................................... 57
Specifications ......................................................................... 57
Spare Parts and Accessories................................................ 60
Dimensions in mm ................................................................. 61

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List of Figures
Figure 1 DPT145 with DILO DN20 Adapter............................................14
Figure 2 Weather Shield .........................................................................16
Figure 3 MPS1 Sensor ...........................................................................18
Figure 4 DPT145 Startup Sequence.......................................................20
Figure 5 DPT145 Configuration with the MI70 Indicator.........................21
Figure 6 Indoor Installation in a Circuit Breaker .....................................22
Figure 7 Wiring Non-Isolated RS-485.....................................................28
Figure 8 Wiring Power Supply Using Port I ............................................29
Figure 9 PuTTY Terminal Application.....................................................34
Figure 10 Comparing Dewpoint Readings on MI70..................................51
Figure 11 DPT145 Dewpoint Measurement Accuracy .............................58
Figure 12 DPT145 with DILO DN20 Adapter............................................61
Figure 13 DPT145 with ABB Malmkvist Adapter ......................................61
Figure 14 DPT145 with Alstom G1/2" Adapter .........................................62
Figure 15 DPT145 with DILO DN20 Adapter and Weather Shield...........62
List of Tables
Table 1 Manual Revisions .......................................................................8
Table 2 Related Manuals.........................................................................8
Table 3 Output Parameters of DPT145.................................................13
Table 4 Default Serial Interface Settings...............................................33
Table 5 List of Serial Commands ..........................................................35
Table 6 FORM Command Parameters..................................................43
Table 7 FORM Command Modifiers......................................................43
Table 8 Selection of Output Modes .......................................................44
Table 9 Troubleshooting Table..............................................................53
Table 10 Error Messages ........................................................................54
Table 11 Measured Parameters..............................................................57
Table 12 Calculated Parameters.............................................................57
Table 13 Performance .............................................................................57
Table 14 Operating Environment.............................................................58
Table 15 Outputs .....................................................................................58
Table 16 General.....................................................................................59
Table 17 DPT145 Spare Parts and Accessories.....................................60

Chapter 1 ________________________________________________________ General Information
VAISALA ________________________________________________________________________ 7
CHAPTER 1
GENERAL INFORMATION
This chapter provides general notes for the manual and the DPT145.
About This Manual
This manual provides information for installing, operating, and
maintaining Vaisala Multiparameter Transmitter DPT145 for SF6
Gas.
Contents of This Manual
This manual consists of the following chapters:
- Chapter 1, General Information, provides general notes for the
manual and the DPT145.
- Chapter 2, Product Overview, introduces the features, advantages,
and the product nomenclature.
- Chapter 3, Functional Description, describes the primary
application and the sensor technology of DPT145.
- Chapter 4, Installation, provides you with information that is
intended to help you install the DPT145.
- Chapter 5, Operation, contains information that is needed to
operate the DPT145.
- Chapter 6, Maintenance, provides information that is needed in
basic maintenance of the DPT145.
- 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
DPT145.

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Version Information
Table 1 Manual Revisions
Manual Code Description
M211371EN-B October 2011. This manual. Updated technical
specification. Minor editorial corrections.
M211371EN-A Previous version.
Related Manuals
Table 2 Related Manuals
Manual Code Manual Name
M211369EN DPT145 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 DPT145 transmitter 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.
CAUTION Do not open the connection between the adapter and the transmitter.
They are connected at the factory, and the connection should remain
unopened to guarantee tightness.
Use tools only on the nut of the adapter, where the transport protection
cap is connected.
NOTE Keep the transmitter dry and clean.
Do not remove the yellow transport protection cap before you are ready
to install the transmitter. Uncapped transmitters will absorb moisture
which will affect the dewpoint measurement.
NOTE Connect the transmitter directly to the main SF6gas volume, not behind
a sampling line.
After installation, the transmitter will have a small amount of moisture
inside it. In still, dry gas it takes a long time until vapor pressure inside
the measurement cell reaches equilibrium with the main gas tank. It is not
unusual for the stabilization of the dewpoint reading to take several days
after installation.

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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.
Recycling
Recycle all applicable material.
Dispose of the unit according to statutory regulations. Do not dispose of
with regular household refuse.