Vaisala DRYCAP DMT345 User manual

USER'S GUIDE
Vaisala DRYCAP
®
Dewpoint
Transmitters
DMT345 and DMT346
M210762EN-D

PUBLISHED BY
Vaisala Oyj Phone (int.): [phone]
P.O. Box 26 Fax: [phone]
FI-00421 Helsinki
Finland
Visit our Internet pages at http://www.vaisala.com/
© Vaisala 2009
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..........................................................................13
About This Manual.................................................................13
Contents of This Manual.....................................................13
Version Information.............................................................14
Related Manuals.................................................................14
Feedback.............................................................................14
Safety.......................................................................................15
General Safety Considerations...........................................15
Product Related Safety Precautions...................................15
ESD Protection....................................................................15
Recycling ................................................................................16
Regulatory Compliances.......................................................16
Transmitters with LAN or WLAN Interface..........................16
Transmitters with WLAN Interface ......................................17
Patent Notice ..........................................................................17
Trademarks.............................................................................18
License Agreement................................................................18
Warranty..................................................................................18
CHAPTER 2
PRODUCT OVERVIEW................................................................................19
Introduction to DMT345 and DMT346...................................19
Basic Features and Options................................................20
Operating Principle..............................................................21
Structure of the Transmitter ................................................22
Probes and Cooling Set......................................................24
CHAPTER 3
INSTALLATION............................................................................................25
Selecting Location .................................................................25
Mounting the Housing ...........................................................25
Standard Mounting without Mounting Plate........................25
Wall Mounting with Wall Mounting Kit.................................26
Mounting with DIN Rail Installation Kit................................28
Pole Installation with Installation Kit for Pole or Pipeline ....29
Mounting Rain Shield with Installation Kit...........................30
Panel Mounting Frame........................................................31
DMT345 Probe Mounting.......................................................32
Installation with Flange........................................................32
DMT346 Probe and Cooling Set Mounting...........................33
Description of the Cooling Set.............................................34
Parts of the Cooling Set.................................................35
General Probe and Cooling Set Mounting Instructions.......36

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Probe and Cooling Set Mounting with Process Shut
Down ..............................................................................38
Probe and Cooling Set Mounting with Process Running38
Removing the Transmitter for Maintenance...................38
Wiring.......................................................................................39
Cable Bushings ...................................................................39
Cable Grounding .................................................................40
Transmitter Housing Grounding..........................................41
Signal and Power Supply Wiring.........................................41
Connections to a 24 VAC Power Supply.............................43
Optional Modules ...................................................................45
Power Supply Module .........................................................45
Installation......................................................................45
Warnings ........................................................................46
Galvanic Isolation for Output...............................................49
Third Analog Output ............................................................50
Installation and Wiring....................................................50
Alarm Relays.......................................................................51
Installation and Wiring....................................................51
Selecting Relay Activation State ....................................52
RS-422/485 Interface ..........................................................53
Installation and Wiring....................................................53
LAN Interface.......................................................................56
WLAN Interface...................................................................57
Attaching the WLAN Antenna ........................................58
Data Logger Module............................................................58
8-Pin Connector...................................................................60
CHAPTER 4
OPERATION.................................................................................................63
Getting Started........................................................................63
Display/Keypad.......................................................................63
Basic Display.......................................................................63
Graphic History....................................................................64
Menus and Navigation.........................................................66
Changing the Language.................................................67
Rounding Setting............................................................67
Display Backlight Setting................................................68
Display Contrast Setting.................................................68
Keypad Lock (Keyguard)................................................68
Menu PIN Lock...............................................................68
Factory Settings...................................................................69
Display Alarms.....................................................................69
Configuring a Display Alarm...........................................70
MI70 Link Program for Data Handling ..................................71
Serial Line Communication...................................................72
User Port Connection..........................................................72
Service Port Connection......................................................73
Connection Cables.........................................................73
Installing the Driver for the USB Cable ..........................74
Using the Service Port....................................................74
LAN Communication..............................................................75
IP Configuration...................................................................75
Using Display/Keypad....................................................76
Using Serial Line............................................................77

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Wireless LAN Configuration................................................78
Using Display/Keypad....................................................79
Using Serial Line............................................................80
Telnet Settings....................................................................81
Web Configuration for LAN and WLAN...............................81
Terminal Program Settings .................................................82
Opening a Serial/USB Connection.................................83
Opening a Telnet Session (LAN/WLAN)........................84
List of Serial Commands.....................................................85
Getting Measurement Message from Serial Line................87
Starting Continuous Outputting......................................87
R................................................................................87
Stopping Continuous Outputting....................................87
S................................................................................87
Formatting Serial Line Message .........................................88
FTIME and FDATE.........................................................88
FST ................................................................................88
General Settings.....................................................................89
Changing Quantities and Units ...........................................89
Using Display/Keypad....................................................89
Using Serial Line............................................................90
FORM.............................................................................90
UNIT...............................................................................91
Pressure Compensation Setting .........................................92
Using Display/Keypad....................................................92
Using Buttons on Motherboard......................................93
Using Serial Line............................................................93
XPRES and PRES....................................................93
Date and Time.....................................................................94
Using Display/Keypad....................................................94
Using Serial Line............................................................95
User Port Serial Settings.....................................................95
SERI...............................................................................96
SMODE..........................................................................96
INTV...............................................................................97
ECHO.............................................................................97
Data Filtering.......................................................................98
FILT................................................................................98
Device Information..............................................................98
? .....................................................................................99
HELP............................................................................100
ERRS...........................................................................100
VERS ...........................................................................101
Resetting the Device.........................................................101
Locking Menu/Keypad by Using Serial Line .....................101
LOCK ...........................................................................101
Data Recording.....................................................................102
Selecting Data Recording Quantities................................102
DSEL............................................................................102
View Recorded Data.........................................................103
DIR...............................................................................103
PLAY............................................................................104
Deleting Recorded Files....................................................105
UNDELETE..................................................................106
Analog Output Settings.......................................................106
Changing Output Mode and Range..................................106
Analog Output Quantities..................................................108

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AMODE/ASEL..............................................................109
Analog Output Tests..........................................................110
ITEST ...........................................................................110
Analog Output Fault Indication Setting..............................111
AERR............................................................................111
Operation of Relays..............................................................112
Quantity for Relay Output..................................................112
Measurement-Based Relay Output Modes.......................112
Relay Setpoints............................................................112
Hysteresis.....................................................................113
Relay Indicating Transmitter Error Status .........................114
Enabling/Disabling Relays.................................................115
Indication Led Operation...................................................115
Setting Relay Outputs .......................................................116
RSEL............................................................................117
Testing Operation of Relays..............................................118
RTEST..........................................................................118
Operation of the RS-485 Module.........................................119
Networking Commands................................................119
SERI.............................................................................119
ECHO...........................................................................120
SMODE ........................................................................120
INTV .............................................................................120
ADDR ...........................................................................121
OPEN [nn]....................................................................121
CLOSE .........................................................................121
SDELAY .......................................................................122
Sensor Functions .................................................................122
AutoCal..............................................................................122
Automatic AutoCal........................................................123
Manual AutoCal............................................................123
Sensor Purge.....................................................................124
Manual Sensor Purge...................................................124
Interval Purge...............................................................125
Power-Up Purge...........................................................125
PUR.........................................................................125
PURGE....................................................................126
Sensor Warming................................................................126
CHAPTER 5
MAINTENANCE..........................................................................................127
Periodic Maintenance...........................................................127
Cleaning ............................................................................127
Changing the Cooling Set Filter ........................................127
Error States .......................................................................127
Technical Support ................................................................129
Return Instructions ..............................................................129
Vaisala Service Centers.......................................................130
CHAPTER 6
CALIBRATION AND ADJUSTMENT.........................................................131
Calibration.............................................................................131
User Calibration and Adjustment.......................................131
Opening and Closing Adjustment Mode............................132

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Adjustment Information.....................................................132
CTEXT and CDATE.....................................................132
Two-Point Relative Humidity Adjustment..........................133
Using Display/Keypad.......................................................133
Using Serial Line...............................................................134
FCRH...........................................................................134
One-Point Dewpoint Adjustment........................................136
One-Point Dewpoint Adjustment Using Display/Keypad ..136
One-point Dewpoint Adjustment Using Serial Line...........137
Adjusting Temperature........................................................138
Adjusting Temperature Using Display/Keypad .................138
Adjusting Temperature Using Serial Line .........................139
CT ................................................................................139
Adjusting Analog Outputs...................................................140
Adjusting Analog Outputs Using Display/Keypad.............140
Adjusting Analog Outputs Using Serial Line.....................141
ACAL............................................................................141
CHAPTER 7
TECHNICAL DATA....................................................................................142
Specifications.......................................................................142
Performance......................................................................142
Technical Specifications of Optional Modules ..................146
Power Supply Module..................................................146
Analog Output Module.................................................146
Relay Module...............................................................146
RS-485 Module............................................................147
LAN Interface Module ..................................................147
WLAN Interface Module...............................................147
Data Logger Module ....................................................147
Options and Accessories....................................................148
Dimensions (mm/inch).........................................................149
APPENDIX A
EXAMPLE INSTALLATION OF DMT346..................................................151
APPENDIX B
CALCULATION FORMULAS ....................................................................153

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List of Figures
Figure 1 Transmitter Body......................................................................22
Figure 2 Inside the Transmitter...............................................................23
Figure 3 Probes, Cooling Set .................................................................24
Figure 4 Standard Mounting...................................................................26
Figure 5 Mounting with Wall Mounting Kit..............................................26
Figure 6 Dimensions of the Plastic Mounting Plate (mm/inch)...............27
Figure 7 Mounting with Metal Wall Mounting Plate................................27
Figure 8 Dimensions of the Metal Mounting Plate (in mm) ....................28
Figure 9 Mounting with DIN Rail Installation Kit.....................................29
Figure 10 Vertical Pole Installation...........................................................29
Figure 11 Horizontal Pole Installation.......................................................30
Figure 12 Mounting the Rain Shield with Installation Kit..........................30
Figure 13 Panel Mounting Frame.............................................................31
Figure 14 Panel Mounting Dimensions (mm/inch) ...................................32
Figure 15 DMT345 Probe Dimensions (mm/inch)....................................32
Figure 16 Flange Installation Kit...............................................................33
Figure 17 DMT346 Probe Dimensions (in mm)........................................33
Figure 18 Cooling Set Dimensions (in mm)..............................................34
Figure 19 Measurement Ranges With and Without the Cooling Fins......35
Figure 20 Parts of the Cooling Set (Dimensions in mm)..........................35
Figure 21 Mounting Flange Dimensions (in mm) .....................................36
Figure 22 Installing the Probe Through Process Wall..............................37
Figure 23 Installing Probe Through Thick Walls.......................................37
Figure 24 Cable Bushings........................................................................39
Figure 25 Grounding the Screen of Electrical Cable................................40
Figure 26 Screw Terminal Block on the Motherboard..............................41
Figure 27 Connections to 24 VAC Power Supply.....................................44
Figure 28 Power Supply Module ..............................................................45
Figure 29 Galvanic Output Isolation Module............................................49
Figure 30 Third Analog Output.................................................................50
Figure 31 Third analog output selection...................................................51
Figure 32 Relay Module ...........................................................................52
Figure 33 RS-485 Module ........................................................................53
Figure 34 4-Wire RS-485 Bus Connections, Part A.................................55
Figure 35 4-Wire RS-485 Bus Connections, Part B.................................56
Figure 36 LAN Interface Module...............................................................57
Figure 37 WLAN Interface Module...........................................................58
Figure 38 Data Logger Module.................................................................59
Figure 39 Wiring of Optional 8-Pin Connector..........................................60
Figure 40 Basic Display............................................................................64
Figure 41 Graphical Display.....................................................................64
Figure 42 Graphical Display with Data Logger.........................................65
Figure 43 Main Views...............................................................................67
Figure 44 Display Alarm Active ................................................................70
Figure 45 Display Alarms .........................................................................70
Figure 46 Modifying an Alarm Limit..........................................................71
Figure 47 Service Port Connector and User Port Terminal on the
Motherboard.............................................................................72
Figure 48 Connection Example Between PC Serial Port and User Port..73
Figure 49 Network Interface Menu...........................................................76
Figure 50 IP Configuration Menu..............................................................77
Figure 51 Wireless LAN Settings..............................................................79
Figure 52 Entering Network SSID ............................................................80
Figure 53 Selecting the Wireless Network Type ......................................80
Figure 54 Web Configuration Interface for WLAN....................................82

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Figure 55 Opening a Serial Connection....................................................83
Figure 56 Opening a Telnet Connection...................................................84
Figure 57 Pressure Set Buttons on Motherboard.....................................93
Figure 58 Following Device Information on the Display ...........................99
Figure 59 Current/Voltage Switches of Output Modules ........................107
Figure 60 Measurement-Based Relay Output Modes............................112
Figure 61 FAULT/ONLINE STATUS Relay Output Modes.....................115
Figure 62 Relay Availability ....................................................................116
Figure 63 Following AutoCal on the Display...........................................123
Figure 64 Performing Manual Purge.......................................................124
Figure 65 Activating Start-up Purge........................................................125
Figure 66 Error Indicator and Error Message.........................................128
Figure 67 Inserting the Sensor in Reference Humidity 1........................133
Figure 68 Waiting for Readings to Stabilize............................................134
Figure 69 Following Stabilization............................................................136
Figure 70 Proceeding with T d/f Adjustment............................................137
Figure 71 Completing T d/f Adjustment....................................................137
Figure 72 Dewpoint Measurement Accuracy Graph DMT345................143
Figure 73 Dewpoint Measurement Accuracy Graph DMT346................144
Figure 74 DMT345/346 Transmitter Body Dimensions ..........................149
Figure 75 WLAN Antenna Dimensions...................................................150
Figure 76 Cooling Set Installation...........................................................151
Figure 77 Insulation with Mineral Wool...................................................152