Vaisala DRYCAP DMT340 SERIES User manual

USER'S GUIDE
Vaisala DRYCAP® Dewpoint and
Temperature Transmitter Series
DMT340
M210704EN-F

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 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..........................................................................11
About This Manual.................................................................11
Contents of This Manual.....................................................11
Version Information.............................................................12
Documentation Conventions...............................................12
Safety.......................................................................................13
ESD Protection....................................................................13
Recycling ................................................................................13
Regulatory Compliances.......................................................14
EU Declaration of Conformity..............................................14
Transmitters with LAN or WLAN Interface..........................14
Transmitters with WLAN Interface ......................................15
Patent Notice ..........................................................................15
Trademarks.............................................................................15
License Agreement................................................................15
Warranty..................................................................................16
CHAPTER 2
PRODUCT OVERVIEW................................................................................17
Introduction to DMT340.........................................................17
Basic Features and Options................................................18
Structure of the Transmitter ................................................19
Probe Options .....................................................................21
CHAPTER 3
INSTALLATION............................................................................................23
Mounting the Housing ...........................................................23
Standard Mounting without Mounting Plate........................23
Wall Mounting with Wall Mounting Kit.................................24
Mounting with DIN Rail Installation Kit................................26
Pole Installation with Installation Kit for Pole or Pipeline ....27
Mounting the Rain Shield with Installation Kit.....................28
Panel Mounting Frame........................................................28
Wiring ......................................................................................30
Cable Bushings...................................................................30
Grounding the Cables.........................................................31
Transmitter Housing Grounding..........................................32
Signal and Power Supply Wiring.........................................32
Connections to a 24 VAC Power Supply ............................34
Probe Mounting......................................................................35
DMT342 Small-size Flanged Probe for Use with
Sampling Cell......................................................................35
DMT344 For High-pressure Applications............................37
DMT347 Small Pressure-tight Probe..................................39

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Pressure-Tight Swagelok Installation Kits for DMT347.......39
DMT348 For Pressurized Pipelines.....................................41
Tightening the Clasp Nut.....................................................43
Ball Valve Installation Kit for DMT348.................................45
Leak Screw Installation .......................................................47
Mounting the Probe Directly to the Process........................48
Sampling Cell for DMT348..................................................50
Optional Modules ...................................................................52
Power Supply Module .........................................................52
Installation......................................................................53
Warnings ........................................................................54
Galvanic Isolation for Output...............................................57
Installation......................................................................57
Third Analog Output ............................................................57
Installation and Wiring....................................................58
Alarm Relays.......................................................................59
Installation and Wiring....................................................59
Selecting the Activation State of the Relay....................59
RS-422/485 Interface ..........................................................61
Installation and Wiring....................................................62
LAN Interface.......................................................................65
WLAN Interface...................................................................66
Attaching the WLAN Antenna ........................................67
Data Logger Module............................................................68
8-Pin Connector...................................................................70
CHAPTER 4
OPERATION.................................................................................................71
Getting Started........................................................................71
Display/Keypad.......................................................................72
Basic Display.......................................................................72
Graphic History....................................................................73
Menus and Navigation.........................................................75
Changing the Language.................................................76
Rounding Setting............................................................76
Display Backlight Setting................................................76
Display Contrast Setting.................................................77
Keypad Lock (Keyguard)................................................77
Menu PIN Lock...............................................................77
Factory Settings...................................................................78
Display Alarms.....................................................................78
Configuring a Display Alarm...........................................79
MI70 Link Program for Data Handling ..................................81
Serial Line Communication...................................................82
User Port Connection..........................................................83
User Port Operating Modes............................................83
Service Port Connection......................................................84
Connection Cables.........................................................84
Installing the Driver for the USB Cable ..........................84
Using the Service Port....................................................85
LAN Communication..............................................................85
IP Configuration...................................................................86
Using Display/Keypad....................................................86
Using Serial Line............................................................88
Wireless LAN Configuration................................................89
Using Display/Keypad....................................................90

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Using Serial Line............................................................91
Communication Protocol.....................................................92
Web Configuration for LAN and WLAN...............................92
Terminal Program Settings .................................................93
Opening a Serial/USB Connection.................................94
Opening a Telnet Session (LAN/WLAN)........................95
List of Serial Commands.....................................................96
Getting the Measurement Message from Serial Line .........99
Starting Continuous Outputting......................................99
Stopping Continuous Outputting....................................99
Outputting Reading Once ..............................................99
Assign an Alias for the SEND Command ....................100
Communicating with a Transmitter in POLL Mode...........100
OPEN...........................................................................100
CLOSE.........................................................................100
Formatting Serial Line Message .......................................101
FTIME and FDATE.......................................................101
FST ..............................................................................102
General Settings...................................................................103
Changing the Quantities and Units...................................103
Using Display/Keypad..................................................103
Using Serial Line..........................................................104
FORM...........................................................................104
UNIT.............................................................................105
Pressure Compensation Setting .......................................106
Using Display/Keypad..................................................106
Using Buttons on the Motherboard..............................107
Using Serial Line..........................................................107
XPRES and PRES..................................................107
Date and Time...................................................................108
Using Display/Keypad..................................................108
Using Serial Line..........................................................109
Data Filtering.....................................................................109
FILT..............................................................................110
Device Information............................................................110
LIGHT...........................................................................112
HELP............................................................................112
ERRS...........................................................................113
VERS ...........................................................................113
Resetting the Transmitter Using Serial Line .....................113
RESET.........................................................................113
Locking Menu/Keypad Using Serial Line..........................114
LOCK ...........................................................................114
Serial Output Settings..........................................................115
Using Display/Keypad.......................................................115
Using Serial Line...............................................................116
SERI.............................................................................116
SMODE........................................................................117
ADDR...........................................................................117
INTV.............................................................................118
SDELAY.......................................................................118
ECHO...........................................................................119
Data Recording.....................................................................120
Selecting the Data Recording Quantities..........................120
DSEL............................................................................120
View Recorded Data.........................................................121
DIR...............................................................................121

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PLAY ............................................................................122
Deleting the Recorded Files..............................................123
UNDELETE..................................................................123
Analog Output Settings .......................................................123
Changing the Output Mode and Range ............................123
Analog Output Quantities..................................................125
AMODE/ASEL..............................................................126
Analog Output Tests..........................................................127
ITEST ...........................................................................127
Analog Output Fault Indication Setting..............................128
AERR............................................................................128
Operation of Relays..............................................................129
Quantity for Relay Output..................................................129
Measurement-Based Relay Output Modes.......................129
Relay Setpoints............................................................129
Hysteresis.....................................................................131
Relay Indicating Transmitter Error Status .........................131
Enabling/Disabling the Relays...........................................133
Operation of the Indication LEDs ......................................134
Setting the Relay Outputs .................................................134
RSEL............................................................................135
Testing the Operation of Relays........................................137
RTEST..........................................................................137
Sensor Functions .................................................................138
AutoCal..............................................................................138
Automatic AutoCal........................................................138
Manual AutoCal............................................................139
Sensor Purge.....................................................................139
Starting and Configuring Sensor Purge ............................140
Using Display/Keypad (Optional).................................140
Using Serial Line..........................................................141
PURGE....................................................................141
PUR.........................................................................141
Sensor Warming................................................................142
CHAPTER 5
MODBUS ....................................................................................................143
Overview of MODBUS Protocol Support............................143
Taking MODBUS into Use.................................................144
Enabling Serial MODBUS.....................................................145
Using Display/Keypad (Optional) ......................................145
Using Serial Line ...............................................................145
Enabling Ethernet MODBUS................................................147
Using Display/Keypad (Optional) ......................................147
Using Serial Line ...............................................................148
Diagnostic MODBUS Counters ...........................................150
Viewing Counters Using Display/Keypad..........................150
Viewing Counters Using Service Port ...............................150
Disabling MODBUS ..............................................................151

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CHAPTER 6
MAINTENANCE .........................................................................................153
Periodic Maintenance ..........................................................153
Cleaning............................................................................153
Changing the Probe Filter.................................................153
Calibration and Adjustment...............................................153
Error States.......................................................................154
Technical Support................................................................156
Product Returns...................................................................156
CHAPTER 7
CALIBRATION AND ADJUSTMENT.........................................................157
Calibration.............................................................................157
User Calibration and Adjustment ......................................157
Opening and Closing the Adjustment Mode .....................158
Adjustment Information.....................................................159
CTEXT and CDATE.....................................................159
Adjusting Dewpoint Td/f .......................................................160
Two-Point Relative Humidity Adjustment using
Display/Keypad.................................................................160
Two-Point Relative Humidity Adjustment using
Serial Line .........................................................................162
One-Point Dewpoint Adjustment using Display/Keypad...162
One-Point Dewpoint Adjustment using Serial Line...........164
Adjusting Temperature........................................................165
Adjusting Temperature using Display/Keypad..................165
Adjusting Temperature using Serial Line..........................166
CT ................................................................................166
Adjusting Analog Outputs...................................................167
Adjusting Analog Outputs using Display/Keypad..............167
Adjusting Analog Outputs using Serial Line......................168
ACAL............................................................................168
CHAPTER 8
TECHNICAL DATA....................................................................................169
Specifications.......................................................................169
Performance......................................................................169
Operating Environment.....................................................170
Inputs and Outputs............................................................170
Mechanics.........................................................................171
Probe Specifications .........................................................171
Technical Specifications of Optional Modules ..................172
Power Supply Module..................................................172
Analog Output Module.................................................172
Relay Module...............................................................172
RS-485 Module............................................................173
LAN Interface Module ..................................................173
WLAN Interface Module...............................................173
Data Logger Module ....................................................173
Options and Accessories....................................................174
Dimensions (mm/inch).........................................................176

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APPENDIX A
CALCULATION FORMULAS.....................................................................181
APPENDIX B
MODBUS REFERENCE.............................................................................185
Function Codes.....................................................................185
Register Map.........................................................................186
Data Encoding...................................................................186
32-Bit Floating Point Format ........................................186
16-Bit Integer Format ...................................................187
Measurement Data (Read-Only).......................................188
Status Registers (Read-Only) ...........................................189
Configuration Registers.....................................................189
Exception Status Outputs....................................................190
Diagnostic Sub-Functions...................................................191
Device Identification Objects ..............................................192
Exception Responses..........................................................192

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List of Figures
Figure 1 Transmitter Body......................................................................19
Figure 2 Inside the Transmitter...............................................................20
Figure 3 Probe Options ..........................................................................21
Figure 4 Standard Mounting...................................................................23
Figure 5 Mounting with Wall Mounting Kit..............................................24
Figure 6 Dimensions of the Plastic Mounting Plate (mm/inch)...............24
Figure 7 Mounting with Metal Wall Mounting Plate................................25
Figure 8 Dimensions of Metal Mounting Plate (mm/inch) ......................25
Figure 9 Mounting with DIN Rail Installation Kit.....................................26
Figure 10 Vertical Pole.............................................................................27
Figure 11 Horizontal Pole.........................................................................27
Figure 12 Mounting the Rain Shield with Installation Kit..........................28
Figure 13 Panel Mounting Frame.............................................................29
Figure 14 Panel Mounting Dimensions (mm/inch) ...................................29
Figure 15 Cable Bushings........................................................................30
Figure 16 Grounding the Screen of Electrical Cable................................31
Figure 17 Screw Terminal Block on the Motherboard..............................32
Figure 18 Connections to 24 VAC Power Supply.....................................34
Figure 19 DMT342 Installation (without the Sampling Cell).....................35
Figure 20 HMP302SC Optional Sampling Cell.........................................36
Figure 21 DMT344 Probe.........................................................................37
Figure 22 Tightening the Nut....................................................................38
Figure 23 Cleaning of the Tightening Cone..............................................38
Figure 24 DMT347 Probe with Swagelok Installation Kit .........................39
Figure 25 DMT347 Probe Installation to Pipeline with Swagelok
Installation Kit...........................................................................40
Figure 26 DMT348 Probe.........................................................................41
Figure 27 Leak Screw in the DMT348 Probe...........................................42
Figure 28 Sealing of Fitting Body into Process ........................................42
Figure 29 Tightening the Clasp Nut..........................................................43
Figure 30 Installing the DMT348 Probe Through a Ball Valve
Assembly..................................................................................45
Figure 31 Probe in Leak Screw Installation..............................................47
Figure 32 DM240FA with Probe...............................................................48
Figure 33 Example of Installing the Probe Directly on the Process Pipe.49
Figure 34 Sampling Cells DMT242SC2 and DMT242SC ........................50
Figure 35 Installing the Probe in High Temperatures...............................51
Figure 36 Power Supply Module ..............................................................52
Figure 37 Galvanic Output Isolation Module............................................57
Figure 38 Third Analog Output.................................................................57
Figure 39 Third Analog Output Selection.................................................58
Figure 40 Relay Module ...........................................................................60
Figure 41 RS-422/485 Module .................................................................61
Figure 42 4-Wire RS-485 Bus ..................................................................63
Figure 43 2-Wire RS-485 Bus ..................................................................64
Figure 44 LAN Interface Module...............................................................66
Figure 45 WLAN Interface Module...........................................................67
Figure 46 Data Logger Module.................................................................69
Figure 47 Pinout of the Optional 8-Pin Connector....................................70
Figure 48 Basic Display............................................................................72
Figure 49 Graphical Display.....................................................................73
Figure 50 Graphical Display with Data Logger.........................................74
Figure 51 Main Views...............................................................................75
Figure 52 Alarm Limits Shown on Graph Screen.....................................79

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Figure 53 Display Alarm Active.................................................................79
Figure 54 Display Alarms..........................................................................80
Figure 55 Modifying an Alarm Limit..........................................................80
Figure 56 Service Port Connector and User Port Terminal on the
Motherboard .............................................................................82
Figure 57 Connection Example between PC Serial Port and User Port ..83
Figure 58 Network Interface Menu ...........................................................87
Figure 59 IP Configuration Menu..............................................................87
Figure 60 Wireless LAN Settings..............................................................90
Figure 61 Entering Network SSID.............................................................90
Figure 62 Selecting the Wireless Network Type.......................................90
Figure 63 Web Configuration Interface for WLAN....................................93
Figure 64 Opening a Serial Connection....................................................94
Figure 65 Opening a Telnet Connection...................................................95
Figure 66 Pressure Set Buttons on the Motherboard.............................107
Figure 67 Device Information on Display...............................................110
Figure 68 Current/Voltage Switches of Output Modules ........................124
Figure 69 Measurement-Based Relay Output Modes............................130
Figure 70 FAULT/ONLINE STATUS Relay Output Modes.....................132
Figure 71 Relay Availability ....................................................................134
Figure 72 Following AutoCal on the Display...........................................139
Figure 73 Sensor Purge Settings............................................................140
Figure 74 Performing Sensor Purge.......................................................140
Figure 75 Serial Interface Settings .........................................................145
Figure 76 IP Configuration......................................................................147
Figure 77 Wireless LAN Settings............................................................147
Figure 78 Communication Protocol ........................................................148
Figure 79 MODBUS Counters................................................................150
Figure 80 Error Indicator and Error Message.........................................154
Figure 81 Starting the Adjustment..........................................................160
Figure 82 Performing Purge ...................................................................160
Figure 83 Following the RH Trend on Graphical Display .......................161
Figure 84 Ending Adjustment of Point 1.................................................161
Figure 85 Proceeding to Adjustment of Point 2......................................161
Figure 86 Completing Adjustment of Point 2..........................................161
Figure 87 Following Stabilization............................................................163
Figure 88 Proceeding with T d/f Adjustment............................................163
Figure 89 Completing T d/f Adjustment....................................................163
Figure 90 Dewpoint Accuracy Graph......................................................169
Figure 91 DMT340 Transmitter Body Dimensions .................................176
Figure 92 WLAN Antenna Dimensions...................................................177
Figure 93 Sampling Cell Dimensions......................................................177
Figure 94 DMT342 Probe Dimensions ...................................................178
Figure 95 DMT344 Probe Dimensions ...................................................178
Figure 96 DMT347 Probe Dimensions ...................................................179
Figure 97 DMT348 Standard Probe Dimensions....................................179
Figure 98 NPT 1/2" Nut Dimensions.......................................................180
Figure 99 DMT348 Optional 400mm Probe Dimensions........................180