Alava Ingenieros Vaisala HUMICAP HMT310 User manual

USER'S GUIDE
Vaisala HUMICAP® Humidity and
Temperature Transmitter
HMT310
M210619EN-E

PUBLISHED BY
Vaisala Oyj
Street address: Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland
Mailing address: P.O. Box 26, FI-00421 Helsinki, Finland
Phone: [phone]
Fax: [phone]
Visit our Internet pages at www.vaisala.com.
© Vaisala 2014
No part of this manual may be reproduced, published or publicly displayed in any form
or by any means, electronic or mechanical (including photocopying), nor may its
contents be modified, translated, adapted, sold or disclosed to a third party without prior
written permission of the copyright holder. Translated manuals and translated portions
of multilingual documents are based on the original English versions. In ambiguous
cases, the English versions are applicable, not the translations.
The contents of this manual are subject to change without prior notice.
This manual does not create any legally binding obligations for Vaisala towards
customers or end users. All legally binding obligations and agreements are included
exclusively in the applicable supply contract or the General Conditions of Sale and
General Conditions of Service of Vaisala.

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Table of Contents
CHAPTER 1
GENERAL INFORMATION............................................................................ 9
About This Manual ................................................................... 9
Version Information ............................................................. 10
Related Manuals ................................................................. 10
Documentation Conventions ............................................... 10
Safety....................................................................................... 11
ESD Protection.................................................................... 11
Recycling ................................................................................ 12
Regulatory Compliances ....................................................... 12
Emissions....................................................................... 12
Immunity......................................................................... 12
Trademarks ............................................................................. 13
Software License.................................................................... 13
Warranty .................................................................................. 13
CHAPTER 2
PRODUCT OVERVIEW................................................................................ 15
Introduction to HMT310 ......................................................... 15
Output Quantities ................................................................... 16
HMT310 Transmitter Parts..................................................... 17
Probe Options......................................................................... 18
Filter Options .......................................................................... 19
Sensor Options....................................................................... 19
CHAPTER 3
INSTALLATION............................................................................................ 21
Measuring at Overpressure................................................... 21
Pressure Regulator Recommended.................................... 21
Selecting Location ................................................................. 21
Mounting the Transmitter /
Removing the Transmitter Unit ........................................... 22
Mounting the Transmitter with Optional Rain Shield........... 24
Mounting the Rain Shield with Larger Mounting Plate ........ 24
Mounting the Probes ........................................................... 25
Beware of Temperature Differences .............................. 25
General Instructions for Probes with Cable ................... 26
HMT313 for General Use ............................................... 27
HMT314 for Pressurized Spaces ................................... 28
HMT315 for High Temperatures .................................... 29
HMT317 for Demanding Processes............................... 30
HMT318 for Pressurized Pipelines ................................ 30
Tightening the Clasp Nut ............................................... 31
Connections............................................................................ 33
Cable Wiring........................................................................ 33

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Power Supply Requirements.................................................34
CHAPTER 4
OPERATION .................................................................................................35
Power Supply..........................................................................35
Transmitter Start-Up...............................................................35
Serial Line and Analog Communication Options................36
RS-232 Serial Port Connection ...........................................36
USB Connection ..................................................................37
Installing the Driver for the USB Cable ..........................37
Connection to an MI70 Hand-held Indicator........................38
Terminal Program Settings....................................................39
Opening a Serial/USB Connection with PuTTY .............39
List of Serial Commands .......................................................40
Measurement Output..............................................................42
Start Continuous Outputting ................................................42
Stop Continuous Outputting ................................................42
Set Continuous Output Interval for RUN Mode ...................42
Output Reading Once..........................................................43
Set Serial Interface Mode ....................................................43
Serial Line Settings..............................................................43
Set Transmitter Address for Use in POLL Mode .................44
Temporarily Open Transmitter from POLL Mode
to Receive Serial Commands..............................................44
Set Transmitter in POLL Mode ............................................45
Output Formatting ..................................................................45
Set Serial Output Format.....................................................45
Set Time and Date...............................................................47
Add Time and Date to SEND and R Outputs ......................47
Select Metric or Nonmetric Output Units .............................48
Output State of Chemical Purge or Sensor Heating
(with SEND and R Commands)...........................................49
Other Commands....................................................................50
Check Transmitter Settings .................................................50
Serial Bus Echo ...................................................................50
All Devices in POLL Mode Send Their Addresses..............51
List Commands....................................................................51
Set Ambient Pressure for Calculations................................51
Set Result Filtering ..............................................................52
Reset Transmitter ................................................................53
Display Error Messages ......................................................53
Setting, Scaling and Testing Analog Outputs .....................54
Set Analog Output Mode .....................................................54
Select Parameter for Analog Outputs..................................54
Scale Analog Outputs..........................................................55
Test Analog Outputs............................................................56
Test Analog Outputs for Desired Readings.........................56
Set Error Outputs.................................................................57
Chemical Purge (Optional) ....................................................57
General ................................................................................57
Automatic/Manual Chemical Purge .....................................58
Automatic Chemical Purge Settings.....................................59
Turn ON/OFF Automatic Chemical Purge...........................59
Set Chemical Purge Interval................................................59

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Chemical Purge in Powerup................................................ 60
Chemical Purge Activated Manually .................................... 60
Starting Manual Chemical Purge ........................................ 60
Sensor Heating (Optional)..................................................... 61
General................................................................................ 61
HMT317 Fuel Cell Model Heating Settings.................... 61
Setting Humidity Sensor Heating ......................................... 62
Sensor Heating ON/OFF..................................................... 62
Setting Heating Parameters ................................................ 62
CHAPTER 5
MAINTENANCE ........................................................................................... 65
Periodic Maintenance ............................................................ 65
Calibration Interval .............................................................. 65
Replacing Consumables........................................................ 65
Changing the Filter .............................................................. 65
Changing the Sensor .......................................................... 66
Technical Support .................................................................. 67
Product Returns ..................................................................... 67
CHAPTER 6
CALIBRATION AND ADJUSTMENT........................................................... 69
Calibration and Adjustment Commands.............................. 70
Revert to Factory Calibration .............................................. 70
View Current Offset and Gain Adjustment .......................... 70
Relative Humidity Calibration after Sensor Change............ 71
Set Calibration Information Text.......................................... 71
Set Calibration Date ............................................................ 72
Analog Output Calibration ................................................... 72
Multipoint Relative Humidity Adjustment............................. 73
Relative Humidity Calibration and Adjustment
(in Two Points)........................................................................ 73
Low End Adjustment ........................................................... 74
High End Adjustment .......................................................... 75
Temperature Calibration and Adjustment
(in One Point).......................................................................... 76
Humidity Calibration and Adjustment
(in One Point).......................................................................... 77
Multipoint Adjustment Using Serial Line ............................. 78
MPC Command Syntax ................................................. 78
Example Multipoint Adjustment Procedure .................... 79
Adjustment Using an MI70 Indicator .................................... 81
Starting MI70 Adjustment.................................................... 81
Adjusting RH with MI70....................................................... 82
1-point RH Adjustment ................................................... 82
2-point RH Adjustment ................................................... 82
LiCl – NaCl automatic adjustment.................................. 83
Adjusting T with MI70 .......................................................... 83
1-point T adjustment ...................................................... 84
2-point T adjustment ...................................................... 84
Environment Settings .......................................................... 85
Last Adjustment Date.......................................................... 85

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CHAPTER 7
TECHNICAL DATA ......................................................................................87
Specifications .........................................................................87
Calculated Variables............................................................90
Accuracies of Calculated Variables.....................................90
Accuracy of Dewpoint Temperature °C..........................90
Accuracy of Mixing Ratio g/kg
(Ambient Pressure 1013 mbar) ......................................90
Accuracy of Wet Bulb Temperature °C ..........................91
Accuracy of Absolute Humidity g/m³ ..............................91
Dewpoint Temperature ........................................................92
Spare Parts and Accessories ................................................93
Dimensions in mm (inches)...................................................94
Transmitter Enclosure and Mounting Plate Dimensions .....94
Rain Shield Dimensions ......................................................95
Probe Dimensions ...............................................................96
HMT311..........................................................................96
HMT313..........................................................................96
HMT314..........................................................................97
HMT315..........................................................................97
HMT317..........................................................................98
HMT318..........................................................................98
APPENDIX A
PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES ...........99
Duct Installation Kits (for HMT313/317/315).........................99
Pressure-Tight Swagelok Installation Kits
(for HMT317)..........................................................................100
RH Probe Installation.........................................................100
Examples of Vapor-Tight Installations
with Cable Gland...................................................................101
RH Probe Installations (for HMT313/317) .........................101
Ball Valve Installation kit for HMT318.................................102

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List of Figures
Figure 1 HMT310 Transmitter Parts ....................................................... 17
Figure 2 HMT310 Probes ....................................................................... 18
Figure 3 Mounting with Mounting Plates ................................................ 22
Figure 4 Mounting Plate Dimensions...................................................... 23
Figure 5 Rain Shield with Larger Mounting Plate ................................... 24
Figure 6 Measurement Error at 100 %RH when Difference Between
Ambient and Sensor Temperature is 1 °C ............................... 25
Figure 7 Horizontal Mounting of Probe................................................... 26
Figure 8 Vertical Mounting of Probe ....................................................... 27
Figure 9 HMT314 Installation ................................................................. 28
Figure 10 Marking the Nut ........................................................................ 29
Figure 11 HMT318 Probe Dimensions (in mm)........................................ 30
Figure 12 Sealing of Fitting Body into Process ........................................ 31
Figure 13 Tightening the Clasp Nut.......................................................... 32
Figure 14 8-Pin Connector (Left) and
Screw Terminal Connector (Right)........................................... 33
Figure 15 PuTTY Serial Line Configuration.............................................. 39
Figure 16 Decrease of Sensor Gain Due to Interfering Chemical and
Effect of Chemical Purge Process ........................................... 58
Figure 17 Changing the Sensor................................................................ 67
Figure 18 Location of Adjustment Button ................................................. 74
Figure 19 Accuracy over Temperature Range ......................................... 88
Figure 20 Accuracy in Dewpoint Measurement (°C) ................................ 92
Figure 21 Transmitter Enclosure and Mounting Plate Dimensions .......... 94
Figure 22 Rain Shield Dimensions (Back)................................................ 95
Figure 23 Rain Shield Dimensions (Side and Outer) ............................... 95
Figure 24 Probe Dimensions .................................................................... 96
Figure 25 HMT313 Dimensions................................................................ 96
Figure 26 HMT314 Dimensions................................................................ 97
Figure 27 HMT315 Dimensions................................................................ 97
Figure 28 HMT317 Dimensions................................................................ 98
Figure 29 HMT318 Dimensions................................................................ 98
Figure 30 Duct Installation Kit................................................................... 99
Figure 31 Swagelok Installation Kit for RH Probe .................................. 100
Figure 32 Cable Installation with Cable Gland AGRO............................ 101
Figure 33 Probe Installation with Cable Gland ....................................... 102
Figure 34 HMT318 Ball Valve Assembly Installation.............................. 103

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List of Tables
Table 1 Manual Revisions .....................................................................10
Table 2 Related Manuals.......................................................................10
Table 3 HMT310 Output Quantities.......................................................16
Table 4 HMT318 Probe Dimensions .....................................................31
Table 5 Current Consumption by Output Type/Function.......................34
Table 6 Measurement Output ................................................................40
Table 7 Output Formatting.....................................................................40
Table 8 Other Commands .....................................................................41
Table 9 Setting, Scaling and Testing Analog Outputs...........................41
Table 10 Calibration and Adjustment* .....................................................41
Table 11 Chemical Purge ........................................................................41
Table 12 Sensor Heating .........................................................................41
Table 13 Quantity Abbreviations for FORM Command...........................46
Table 14 Modifiers ...................................................................................46
Table 15 Output Quantities and their Metric and Nonmetric Units ..........48
Table 16 Pressure Conversion Chart ......................................................52
Table 17 Output Quantities and their Metric and Nonmetric Units ..........55
Table 18 Example List for Multipoint Correction......................................79
Table 19 Relative Humidity Specifications ..............................................87
Table 20 Temperature Specifications and
Operating Pressure Ranges .....................................................88
Table 21 Electrical Connections ..............................................................89
Table 22 General .....................................................................................89
Table 23 Calculated Variables (Typical Ranges) ....................................90
Table 24 Spare Parts and Accessories ...................................................93

Chapter 1 _________________________________________________________ General Information
VAISALA_________________________________________________________________________ 9
CHAPTER 1
GENERAL INFORMATION
This chapter provides general notes for the manual and the HMT310.
About This Manual
This manual provides information for installing, operating, and
maintaining Humidity and Temperature Transmitter HMT310.
This manual consists of the following chapters:
- Chapter 1, General Information, provides general notes for the manual
and the HMT310.
- Chapter 2, Product Overview, introduces the features, advantages, and
the product nomenclature.
Chapter 3, Installation, provides you with information that is intended
to help you install the HMT310.
Chapter 4, Operation, contains information that is needed to operate
the HMT310.
- Chapter 5, Maintenance, provides information that is needed in basic
maintenance of the HMT310.
- Chapter 6, Calibration and Adjustment, describes the relative humidity
and temperature adjustment procedures.
- Chapter 7, Technical Data, provides the technical data of the
HMT310.
- Appendix A describes the available probe installation kits and
provides some installation examples.

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Version Information
Table 1 Manual Revisions
Manual Code
Description
M210619EN-E
March 2014. This manual. New software
functionality applicable from version 2.0.1 onward.
Voltage output added to analog output options, new
voltage parameters in the AMODE command.
Multipoint calibration instructions and MPC
command added. Added information on filter and
sensor options, rain shield, MI70 hand-held
indicator, and USB connection. Transmitter plastic
housing material changed to PPS. Updated serial
terminal instructions, list of optional accessories
and operating voltage and power consumption
specifications. Calculated variables and fuel cell
heating information added. Document template
version updated, quality improvement updates.
M210619EN-D
November 2009 - Removed HUMICAP® 180,
HUMICAP® 180C and HUMICAP® 180L2 from
sensor options. Updated Technical Data.
M210619EN-C
September 2007 - Added HUMICAP®180R and
HUMICAP
®
180RC as sensor options.
Related Manuals
Table 2 Related Manuals
Manual Code
Manual Name
M210297EN
Vaisala HUMICAP® Hand-Held Humidity and
Temperature Meter HM70 User’s Guide
M210185EN
Vaisala Humidity calibrator HMK15 User’s 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.