Vaisala HUMICAP HMT330 SERIES User manual

USER'S GUIDE
Vaisala HUMICAP
®
Humidity and
Temperature Transmitter Series
HMT330
M210566EN-D

PUBLISHED BY
Vaisala Oyj Phone (int.): [phone]
P.O. Box 26 Fax: [phone]
FIN-00421 Helsinki
Finland
Visit our Internet pages at http://www.vaisala.com/
© Vaisala 2006
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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VAISALA _____________________________________________________________________ 1
Table of Contents
CHAPTER 1
GENERAL INFORMATION ............................................................................ 9
About This Manual ................................................................... 9
Contents of This Manual ....................................................... 9
General Safety Considerations ........................................... 10
Feedback............................................................................. 10
Product Related Safety Precautions .................................... 11
ESD Protection ....................................................................... 11
Recycling ................................................................................ 12
Trademarks ............................................................................. 12
License Agreement ................................................................ 12
Warranty .................................................................................. 13
CHAPTER 2
PRODUCT OVERVIEW................................................................................ 15
Introduction to HMT330 ......................................................... 15
Basic Features and Options................................................ 16
Probe Options ..................................................................... 19
Warmed Probe HMT337 ..................................................... 20
CHAPTER 3
INSTALLATION............................................................................................ 21
Mounting the Housing ........................................................... 21
Standard Mounting without Mounting Plate ........................ 21
Wall Mounting with Wall Mounting Kit................................. 22
Mounting with DIN Rail Installation Kit ................................ 23
Pole Installation with Installation Kit for Pole or Pipeline .... 24
Mounting Rain Shield with Installation Kit ........................... 26
Panel Mounting Frame........................................................ 27
Wiring ...................................................................................... 28
Cable Bushings ................................................................... 28
Grounding the Cables ......................................................... 29
Grounding the Transmitter Housing.................................... 30
Signal and Power Supply Wiring......................................... 31
Connections to 24 VAC Power Supply ............................... 32
Probe Mounting ...................................................................... 34
General Instructions for Probes with Cable ........................ 35
HMT333 for Ducts and Tight Spaces .................................. 37
HMT334 for High Pressure and Vacuum Applications........ 37
HMT335 for High Temperatures ......................................... 40
HMT337 for High Humidity Applications ............................. 40
Temperature Probe (Optional) ............................................ 40
HMT338 for Pressurized Pipelines...................................... 41
Tightening the Clasp Nut..................................................... 42

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Optional Modules....................................................................44
Power Supply Module..........................................................44
Installation ......................................................................45
Warnings ........................................................................46
Galvanic Isolation for Output ...............................................48
Third Analog Output ............................................................48
Installation and Wiring ....................................................49
Relays..................................................................................50
Installation and Wiring ....................................................50
Selecting the Activation State of the Relay ....................50
RS-422/485 Interface ..........................................................52
Installation and Wiring ....................................................52
8-Pin Connector...................................................................55
CHAPTER 4
OPERATION .................................................................................................57
Getting Started........................................................................57
Display/Keypad (Optional).....................................................57
Basic Display .......................................................................57
Graphic History....................................................................58
Menus and Navigation.........................................................59
Language Setting ...........................................................60
Rounding Setting............................................................61
Display Backlight Setting................................................61
Display Contrast Setting.................................................61
Keypad Lock (Key guard)...............................................62
Menu PIN Lock...............................................................62
Factory Settings .............................................................63
MI70 Link Program for Data Handling ..................................63
Serial Line Communication ...................................................63
User Port Connection ..........................................................64
Service Port Connection......................................................65
Terminal Program Settings..................................................66
List of Serial Commands .....................................................68
Getting Measurement Message from Serial Line ................70
Stopping Continuous Outputting ....................................70
S ................................................................................70
Outputting Reading Once...............................................70
SEND ........................................................................70
SEND D.....................................................................71
Formatting Serial Line Message..........................................72
TIME and DATE .............................................................72
FTIME and FDATE.........................................................72
FST.................................................................................73
General Settings .....................................................................74
Changing Quantities and Units............................................74
Using Display/Keypad ....................................................74
Using Serial Line ............................................................75
FORM........................................................................75
UNIT ..........................................................................76

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Pressure Compensation Setting ......................................... 77
Using Display/Keypad .................................................... 77
Using Serial Line ............................................................ 77
PRES and XPRES .................................................... 77
User Port Serial Settings..................................................... 78
Using Display/Keypad .................................................... 78
Using Serial Line ............................................................ 79
SERI ............................................................................... 79
SMODE .......................................................................... 80
INTV ............................................................................... 80
ECHO............................................................................. 81
Data Filtering ....................................................................... 81
FILT................................................................................ 82
Device Information .............................................................. 82
? ..................................................................................... 83
HELP.............................................................................. 83
ERRS ............................................................................. 84
VERS ............................................................................. 84
Resetting Transmitter by Using Serial Line......................... 85
RESET ........................................................................... 85
Locking Menu/Keypad by Using Serial Line ....................... 85
LOCK ............................................................................. 85
Data Recording....................................................................... 87
Selecting Data Recording Quantities .................................. 87
DSEL.............................................................................. 87
View Recorded Data ........................................................... 88
DIR ................................................................................. 88
PLAY .............................................................................. 89
Deleting the Recorded Files................................................ 90
DELETE/UNDELETE ..................................................... 90
Analog Output Settings ......................................................... 91
Changing Output Mode and Range .................................... 91
Analog Output Quantities .................................................... 93
AMODE/ASEL................................................................ 93
Analog Output Tests ........................................................... 95
ITEST ............................................................................. 95
Analog Output Fault Indication Setting ............................... 96
AERR ............................................................................. 96
Operation of Relays ............................................................... 97
Quantity for Relay Output.................................................... 97
Measurement-Based Relay Output Modes......................... 97
Relay Setpoints .............................................................. 97
Hysteresis ...................................................................... 98
Relay Indicating Transmitter Error Status ........................... 98
Enabling/Disabling Relays ................................................ 100
Setting Relay Outputs ....................................................... 100
RSEL............................................................................ 101
Testing Operation of Relays.............................................. 103
RTEST ......................................................................... 103

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Operation of RS-485 Module ...............................................104
Networking Commands .....................................................104
SERI .............................................................................104
ECHO ...........................................................................105
SMODE ........................................................................105
INTV .............................................................................106
ADDR ...........................................................................106
SEND............................................................................107
OPEN ...........................................................................107
CLOSE .........................................................................107
Sensor Functions .................................................................108
Chemical Purge (Optional) ................................................108
Automatic Chemical Purge (Interval Purge).................109
Manual Chemical Purge ...............................................109
Chemical Purge in Power Up .......................................109
Starting and Configuring Chemical Purge.........................110
Using Buttons on Motherboard.....................................110
Using Display/Keypad (Optional) .................................110
Using Serial Line ..........................................................111
PURGE....................................................................111
PUR.........................................................................112
Sensor Heating..................................................................113
Setting Humidity Sensor Heating .................................113
XHEAT ....................................................................113
CHAPTER 5
MAINTENANCE..........................................................................................115
Periodic Maintenance...........................................................115
Cleaning ............................................................................115
Changing the Probe Filter .................................................115
Changing the Sensor ...........................................................116
Error States .......................................................................117
CHAPTER 6
CALIBRATION AND ADJUSTMENT .........................................................119
Opening and Closing the Adjustment Mode......................119
Relative Humidity Adjustment.............................................121
Using Push-Buttons...........................................................121
Using Display/Keypad .......................................................122
Using Serial Line ...............................................................123
CRH..............................................................................123
Relative Humidity Adjustment after Sensor Change ........124
Using Display/Keypad .......................................................124
Using Serial Line ...............................................................124
FCRH............................................................................124
Temperature Adjustment .....................................................125
Using Display/Keypad .......................................................125
Using Serial Line ...............................................................125
CT.................................................................................126
CTA ..............................................................................126

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Analog Output Adjustment.................................................. 127
Using Display/Keypad ....................................................... 127
Using Serial Line ............................................................... 127
ACAL............................................................................ 127
Feeding Adjustment Information........................................ 128
Using Display/Keypad ....................................................... 128
Using Serial Line ............................................................... 128
CTEXT ......................................................................... 128
CDATE ......................................................................... 128
CHAPTER 7
TECHNICAL DATA .................................................................................... 129
Specifications ....................................................................... 129
Performance...................................................................... 129
Relative Humidity ......................................................... 129
Temperature (+ Operating Pressure Ranges) ............. 130
Optional Temperature Probe ....................................... 130
Calculated Variables .................................................... 131
Accuracies of Calculated Variables .................................. 131
Accuracy of Dewpoint Temperature °C ....................... 131
Accuracy of Mixing Ratio g/kg (Ambient Pressure 1013
mbar)............................................................................ 132
Accuracy of Wet Bulb Temperature °C ........................ 132
Accuracy of Absolute Humidity g/m³ ............................ 132
Dewpoint Temperature (HMT337 Warmed Probe
Option)............................................................................... 133
Operating Environment ................................................ 133
Inputs and Outputs....................................................... 134
Mechanics .................................................................... 134
Transmitter Weights ..................................................... 135
Technical Specifications of Optional Modules .................. 135
Power Supply Module .................................................. 135
Analog Output Module ................................................. 135
Relay Module ............................................................... 136
RS-485 Module ............................................................ 136
Options and Accessories ............................................. 136
Dimensions (in mm) ............................................................. 139
HMT331............................................................................. 140
HMT333............................................................................. 140
HMT334............................................................................. 141
HMT335............................................................................. 141
HMT337............................................................................. 142
HMT338............................................................................. 142
Temperature Probe ........................................................... 142
Technical Support ................................................................ 143
Return Instructions .............................................................. 143
Vaisala Service Centers....................................................... 144

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APPENDIX A
PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES .........145
Duct Installation Kits (for HMT333/337/335).......................145
Duct Installation Kit for Temperature Probe (for HMT337)146
Pressure Tight Swagelok Installation Kits (for HMT337)..147
RH Probe Installation.........................................................147
Temperature Probe Installation .........................................147
Examples of Vapor Tight Installations with Cable Gland .148
RH-Probe Installations (for HMT333/337) .........................148
T- Probe Installations (HMT337) .......................................149
Example of Climate Chamber Installation .........................150
Example of Installation Through Roof ...............................151
Ball Valve Installation Kit for HMT338 ................................152
Meteorological Installation Kit (for HMT337) .....................154
APPENDIX B
CALCULATION FORMULAS.....................................................................155
List of Figures
Figure 1 Transmitter Body ......................................................................17
Figure 2 Inside of Open Transmitter .......................................................18
Figure 3 Probe Options...........................................................................19
Figure 4 Standard Mounting ...................................................................21
Figure 5 Mounting with Wall Mounting Kit ..............................................22
Figure 6 Dimensions of Plastic Mounting Plate ......................................22
Figure 7 Mounting with DIN Rail Installation Kit .....................................23
Figure 8 Vertical Pole..............................................................................24
Figure 9 Horizontal Pole .........................................................................24
Figure 10 Mounting with Metal Wall Mounting Plate ................................25
Figure 11 Dimensions of Metal Mounting Plate (mm) ..............................25
Figure 12 Mounting Rain Shield with Installation Kit ................................26
Figure 13 Panel Mounting with Frame......................................................27
Figure 14 Panel Mounting Dimensions.....................................................27
Figure 15 Cable Bushings.........................................................................28
Figure 16 Grounding the Screen of Electrical Cable ................................29
Figure 17 Screw Terminal Block on Motherboard ....................................31
Figure 18 Connections to 24 VAC Power Supply.....................................33
Figure 19 Measurement Error at 100 %RH ..............................................34
Figure 20 Horizontal Mounting of Sensor Head........................................35
Figure 21 Vertical Mounting of Sensor Head............................................36
Figure 22 HMT344 Probe .........................................................................38
Figure 23 Tightening the Nut ....................................................................38
Figure 24 Cleaning of Tightening Cone ....................................................39
Figure 25 HMT338 Probe .........................................................................41
Figure 26 Sealing of Fitting Body into Process.........................................42
Figure 27 Tightening the Clasp Nut ..........................................................42
Figure 28 Power Supply Module...............................................................44
Figure 29 Galvanic Output Isolation Module.............................................48
Figure 30 Third Analog Output .................................................................48
Figure 31 Relay Module............................................................................51
Figure 32 RS-485 Module.........................................................................52

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Figure 33 4-Wire RS-485 Bus .................................................................. 53
Figure 34 Wiring of Optional 8-Pin Connector.......................................... 55
Figure 35 Basic Display............................................................................ 58
Figure 36 Graphical Display ..................................................................... 58
Figure 37 Main Menus .............................................................................. 60
Figure 38 Service Port Connector and User Port Terminal on Mother
Board ........................................................................................ 64
Figure 39 Connection Example Between PC Serial Port and User Port.. 64
Figure 40 Starting Hyper Terminal Connection ........................................ 66
Figure 41 Connecting to Hyper Terminal ................................................. 67
Figure 42 Hyper Terminal Serial Port Settings......................................... 67
Figure 43 Device Information on Display ................................................ 82
Figure 44 Current/Voltage Switches of Output Modules .......................... 91
Figure 45 Measurement-Based Relay Output Modes .............................. 97
Figure 46 FAULT/ONLINE STATUS Relay Output Modes ...................... 99
Figure 47 Relay Indicators on Display.................................................... 100
Figure 48 Decrease of Sensor Gain ....................................................... 108
Figure 49 Purge Buttons on Motherboard .............................................. 110
Figure 50 Chemical Purge Settings........................................................ 110
Figure 51 Performing Chemical Purge ................................................... 111
Figure 52 Changing the Sensor.............................................................. 116
Figure 53 Error Indicator and Error Message......................................... 117
Figure 54 Adjustment and Purge Buttons .............................................. 120
Figure 55 Adjustment Menu ................................................................... 120
Figure 56 Selecting Point 1 Reference Type.......................................... 122
Figure 57 Accuracy over Temperature Range ....................................... 130
Figure 58 Accuracy in Dewpoint Measurement...................................... 133
Figure 59 Transmitter Body Dimensions ................................................ 139
Figure 60 HMT331 Probe Dimensions ................................................... 140
Figure 61 HMT333 Probe Dimensions ................................................... 140
Figure 62 HMT334 Probe Dimensions ................................................... 141
Figure 63 HMT335 Probe Dimensions ................................................... 141
Figure 64 HMT337 Probe Dimensions ................................................... 142
Figure 65 HMT338 Probe Dimensions ................................................... 142
Figure 66 Optional Temperature Probe Dimensions.............................. 142
Figure 67 Duct Mounting Installation Kit................................................. 145
Figure 68 Duct Mounting Installation Kit for T-Probe ............................. 146
Figure 69 Swagelok Installation Kit for RH-probe .................................. 147
Figure 70 Swagelok Installation Kit for T-Probe ..................................... 147
Figure 71 Cable Installation with Cable Gland ....................................... 148
Figure 72 Probe Head Installation with Cable Gland ............................. 148
Figure 73 Vapor Tight Installation........................................................... 149
Figure 74 Wall Mounting Installation ...................................................... 149
Figure 75 Climate Chamber Installation (not Available from Vaisala).... 150
Figure 76 Example of Installation through Roof ..................................... 151
Figure 77 Installing Sensor Head through Ball Valve Assembly ............ 152
Figure 78 Meteorological Installation Kit for Outdoor Installation........... 154

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List of Tables
Table 1 Quantities Measured by HMT330.............................................15
Table 2 Optional Quantities Measured by HMT330 ..............................16
Table 3 HMT338 Probe Dimensions .....................................................41
Table 4 Connecting the Twisted Pair Wires to the Screw Terminals ....52
Table 5 4-Wire (Switch 3: On) ...............................................................53
Table 6 2-Wire (Switch 3: Off) ...............................................................54
Table 7 Wiring of 8-Pin Connector ........................................................55
Table 8 Periods for Trend and Max/Min Calculations ...........................59
Table 9 Graph Information Messages in Cursor Mode .........................59
Table 10 Default Serial Communication Settings for the User Port ........64
Table 11 Fixed Communication Settings for Service Port.......................65
Table 12 FORM Command Modifiers......................................................75
Table 13 Multiplication Factors ................................................................78
Table 14 Selection of Output Modes .......................................................80
Table 15 Filtering Levels..........................................................................81
Table 16 Error Messages ......................................................................118
Table 17 Indicator Led Functions ..........................................................120
Table 18 Calculated Variables (Typical Ranges) ..................................131
Table 19 Transmitter Weights (in kg/lb).................................................135