Vaisala HUMICAP HMT361 User manual

Type
User manual
USER'S GUIDE
Vaisala HUMICAP® Humidity and
Temperature Transmitter Series
HMT360
M010056EN-G
PUBLISHED BY
Visit our Internet pages at http://www.vaisala.com/
© Vaisala 2007
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.
Vaisala Oyj Phone (int.): +358 9 8949 1
P.O. Box 26 Fax: +358 9 8949 2227
FIN-00421 Helsinki
Finland
________________________________________________________________________________
VAISALA________________________________________________________________________ 1
Table of Contents
CHAPTER 1
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Contents of This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Version Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
General Safety Considerations . . . . . . . . . . . . . . . . . . . . .11
Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Product Related Safety Precautions . . . . . . . . . . . . . . . . . .12
ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Regulatory Compliances . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
License Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
CHAPTER 2
PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Introduction to Vaisala HUMICAP® Humidity and
Temperature Transmitter Series HMT360 . . . . . . . . . . . . . .15
Output Quantities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Probe Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
CHAPTER 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
General Installation Instructions . . . . . . . . . . . . . . . . . . . . .19
Mounting the Probe Cable in Gas Group IIC Spaces . . . .19
Selecting Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
General Instructions for Probes with Cable . . . . . . . . . . . .20
Checking the Temperature Reading . . . . . . . . . . . . . . . . .22
Mounting the Transmitter Housing . . . . . . . . . . . . . . . . . . .22
Probe Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
HMP363 for Confined Spaces . . . . . . . . . . . . . . . . . . . . . .25
HMP363/365/367 Duct Installation Kit. . . . . . . . . . . . . 26
HMP364 for High-Pressure Applications . . . . . . . . . . . . . .26
HMP365 for High Temperatures . . . . . . . . . . . . . . . . . . . .29
HMP367 for High Humidities . . . . . . . . . . . . . . . . . . . . . . .29
HMP368 for Pressurized Pipelines or Moisture in Liquids .30
Tightening the Clasp Nut . . . . . . . . . . . . . . . . . . . . . . . 31
Installing the HMP368 Probe Through a Ball Valve
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
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2 _______________________________________________________________________________
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Installation in Hazardous Locations . . . . . . . . . . . . . . . . . .36
US and Canadian Requirements . . . . . . . . . . . . . . . . . 36
European Requirements . . . . . . . . . . . . . . . . . . . . . . . 36
CATEGORY 1 (Zone 0) . . . . . . . . . . . . . . . . . . . . . 36
CATEGORY 2 or 3 (Zone 1 or 2) . . . . . . . . . . . . . . 36
Maximum Cable Resistance Calculation for the Barrier
(Vaisala Order Code: 210664). . . . . . . . . . . . . . . . . . . 37
HMT360 Connected to a Galvanic Isolator . . . . . . . . . 39
HMT360 Connected to a Zener Barrier . . . . . . . . . . . . 40
Examples of Connections . . . . . . . . . . . . . . . . . . . . . . 41
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
CHAPTER 4
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Local Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Power ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
HMT360 with Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
HMT360 without Display . . . . . . . . . . . . . . . . . . . . . . . . . .44
DIP Switch Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Display/Keypad Commands . . . . . . . . . . . . . . . . . . . . . . . .46
Setting the Pressure for Calculations. . . . . . . . . . . . . . 46
Selecting Output Quantities . . . . . . . . . . . . . . . . . . . . . 47
Upper Half of Display . . . . . . . . . . . . . . . . . . . . . . . 47
Lower Half of Display . . . . . . . . . . . . . . . . . . . . . . . 48
Selecting Analog Outputs . . . . . . . . . . . . . . . . . . . . . . 48
Scaling Analog Outputs . . . . . . . . . . . . . . . . . . . . . . . . 49
Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Serial Communication Settings . . . . . . . . . . . . . . . . . . . . .51
Setting the Analog Outputs . . . . . . . . . . . . . . . . . . . . . . . .51
ASEL Selecting Analog Outputs . . . . . . . . . . . . . . . . . 51
S Scaling Analog Outputs . . . . . . . . . . . . . . . . . . . . . . 52
Adjustment Commands . . . . . . . . . . . . . . . . . . . . . . . . . . .53
CRH Relative Humidity Adjustment . . . . . . . . . . . . . . . 53
CT Temperature Adjustment . . . . . . . . . . . . . . . . . . . . 53
Output Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
ITEST Testing Analog Outputs . . . . . . . . . . . . . . . . . . 54
SEND Outputting Measurement Values. . . . . . . . . . . . 55
R Activating Continuous Output. . . . . . . . . . . . . . . . . . 55
S Stopping Continuous Output . . . . . . . . . . . . . . . . . . 55
INTV Setting Output Interval . . . . . . . . . . . . . . . . . . . . 55
PRES Setting Ambient Pressure for Calculations . . . . 56
FILT Output Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Resetting the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . .57
RESET Transmitter Reset . . . . . . . . . . . . . . . . . . . . . . 57
CHAPTER 5
MEASURING AT OVERPRESSURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Pressure Regulator Recommended . . . . . . . . . . . . . . . . . .60
________________________________________________________________________________
VAISALA________________________________________________________________________ 3
CHAPTER 6
CALIBRATION AND ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Calibration Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Factory Calibration and Adjustment . . . . . . . . . . . . . . . . . .61
User Calibration and Adjustment . . . . . . . . . . . . . . . . . . . .62
Removing the Electronics Unit . . . . . . . . . . . . . . . . . . . . . .62
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Calculating Correspondence of Current Values and
Output Quantities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Relative Humidity Adjustment . . . . . . . . . . . . . . . . . . . . . . .65
Automatic Two-Point Adjustment (Only with HMT360
with Display) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Manual Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Low End Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . 67
High End Adjustment (Two-Point Adjustment) . . . . . . 68
One-Point Temperature Adjustment . . . . . . . . . . . . . . . . . .68
ACAL Analog Output Calibration . . . . . . . . . . . . . . . . . . . .69
CHAPTER 7
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Periodical Checking and Cleaning . . . . . . . . . . . . . . . . . . .71
Transmitter Housing and Probe . . . . . . . . . . . . . . . . . . . . .71
CHAPTER 8
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Operation Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Analog Output Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Return Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Vaisala Service Centers . . . . . . . . . . . . . . . . . . . . . . . . . . .75
CHAPTER 9
TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Relative Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Temperature (+ Operating Pressure Ranges) . . . . . . . . . .78
Water Activity in Jet Fuel Applications . . . . . . . . . . . . . . . .79
Calculated Variables (Typical Ranges) . . . . . . . . . . . . . . .80
With HMP361 Probe . . . . . . . . . . . . . . . . . . . . . . . . . . 80
With HMP363, HMP364, HMP365, HMP367 and
HMP368 Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Classification with Current Outputs . . . . . . . . . . . . . . . . . .81
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Accuracy of Calculated Variables . . . . . . . . . . . . . . . . . . . .84
________________________________________________________________________________
4 _______________________________________________________________________________
Accuracy of Dewpoint Temperature °C . . . . . . . . . . . . . . . .85
Accuracy of Mixing Ratio g/kg . . . . . . . . . . . . . . . . . . . . . . .86
Accuracy of Wet Bulb Temperature °C . . . . . . . . . . . . . . . .86
Accuracy of Absolute Humidity g/m3 . . . . . . . . . . . . . . . . .87
APPENDIX A
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
HMP361 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
HMP363 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
HMP364 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
HMP365 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
HMP367 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
HMP368 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
Mounting Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Rain Shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Protection Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
APPENDIX B
WIRING FOR INTRINSICALLY SAFE OPERATION, FM . . . . . . . . . . . . .95
APPENDIX C
WIRING FOR INTRINSICALLY SAFE OPERATION, CSA . . . . . . . . . . . .97
APPENDIX D
CERTIFICATES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
________________________________________________________________________________
VAISALA________________________________________________________________________ 5
List of Figures
Figure 1 Vaisala HUMICAP® Humidity and Temperature Transmitter
Series HMT360 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Figure 2 Probe Options for Vaisala HUMICAP® Humidity and
Temperature Transmitter Series HMT360 . . . . . . . . . . . . . . . .18
Figure 3 Horizontal Mounting of Probe. . . . . . . . . . . . . . . . . . . . . . . . . .20
Figure 4 Vertical Mounting of Probe. . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Figure 5 Measurement Error at 100 %RH . . . . . . . . . . . . . . . . . . . . . . .22
Figure 6 Transmitter Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Figure 7 Parts of the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Figure 8 Installation of HMP363 Probe in Duct with Flange and
Supporting Bar. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Figure 9 HMP364 Probe Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Figure 10 Marking Nut and Fitting Screw. . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 11 Cleaning the Tightening Cone . . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 12 Mounting HMP365 Probe in Duct or Channel . . . . . . . . . . . . .29
Figure 13 HMP368 Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Figure 14 Sealing of Fitting Body into Process . . . . . . . . . . . . . . . . . . . .31
Figure 15 Tightening the Clasp Nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Figure 16 Installing the HMP368 Probe Through a Ball Valve Assembly 33
Figure 17 HMT360 Connected to Galvanic Isolator. . . . . . . . . . . . . . . . .39
Figure 18 HMT360 Connected to a Zener Barrier . . . . . . . . . . . . . . . . . .40
Figure 19 STAHL 9160/13-11-11 (Galvanic Isolator). . . . . . . . . . . . . . . .41
Figure 20 STAHL 9001/51-280-091-141 (Zener Barrier). . . . . . . . . . . . .41
Figure 21 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Figure 22 Local Display/Keypad Interface . . . . . . . . . . . . . . . . . . . . . . . .44
Figure 23 DIP Switch Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Figure 24 Detaching the Electronics Unit with Probe for Calibration and
Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Figure 25 Connecting Power Supply and Multimeter for Calibration . . . .63
Figure 26 Display Chart of the Automatic Adjustment Procedure . . . . . .66
Figure 27 Accuracy over Temperature Range. . . . . . . . . . . . . . . . . . . . .79
________________________________________________________________________________
6 _______________________________________________________________________________
________________________________________________________________________________
VAISALA________________________________________________________________________ 7
List of Tables
Table 1 Manual Revisions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Table 2 Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Table 3 Output Quantities for Vaisala HUMICAP® Humidity and
Temperature Transmitter Series HMT360 . . . . . . . . . . . . . . . . . .16
Table 4 HMP368 Probe Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Table 5 Serial Communications Settings . . . . . . . . . . . . . . . . . . . . . . . . .51
Table 6 Pressure Conversion Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Table 7 Relative Humidity Specifications . . . . . . . . . . . . . . . . . . . . . . . . .77
Table 8 Temperature Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Table 9 Water Activity in Jet Fuel Applications Specifications . . . . . . . . .79
Table 10 HMP361 Calculated Variables Specifications . . . . . . . . . . . . . . .80
Table 11 HMP363, HMP364, HMP365, HMP367& HMP368 Probes
Calculated Variables Specifications. . . . . . . . . . . . . . . . . . . . . . .80
Table 12 Output Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Table 13 General Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Table 14 Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
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8 _______________________________________________________________________________
Chapter 1 ________________________________________________________ General Information
VAISALA________________________________________________________________________ 9
CHAPTER 1
GENERAL INFORMATION
This chapter provides general notes for the manual and the product.
About This Manual
This manual provides information for installing, operating, and
maintaining the Vaisala HUMICAP
®
Humidity and Temperature
Transmitter Series HMT360.
Contents of This Manual
This manual consists of the following chapters:
- Chapter 1, General Information: This chapter provides general
notes for the manual and the product.
- Chapter 2, Product Overview: This chapter introduces the features,
advantages, and the product nomenclature.
- Chapter 3, Installation: This chapter provides you with information
that is intended to help you install this product.
- Chapter 4, Operation: This chapter contains information that is
needed to operate this product.
- Chapter 5, Measuring at Overpressure: This chapter provides you
with important information concerning measurement in conditions
with pressure higher than the normal atmospheric pressure.
User's Guide ______________________________________________________________________
10 __________________________________________________________________ M010056EN-G
- Chapter 6, Calibration and Adjustment: This chapter contains
instructions for checking the calibration and adjusting this product.
- Chapter 7, Maintenance: This chapter provides information that is
needed in basic maintenance of the product.
- Chapter 8, Troubleshooting: This chapter describes common
problems, their probable causes and remedies, and contact
information.
- Chapter 9, Technical Data: This chapter provides technical data of
the product.
- Appendix A, Dimensions: This Appendix contains parts drawings
of the transmitter housing, probes and some transmitter mounting
accessories with metric and nonmetric dimensions specified.
- Appendix B, Wiring for Intrinsically Safe Operation, FM: This
appendix contains the wiring diagram for intrinsically safe
operation approved by Factory Mutual (FM).
- Appendix C, Wiring for Intrinsically Safe Operation, CSA: This
appendix contains the wiring diagram for intrinsically safe
operation approved by the Canadian Standards Association (CSA).
- Appendix D, Certificates: This Appendix contains copies of the
EXi intrinsically safe certificates issued for the HMT360 series.
Chapter 1 ________________________________________________________ General Information
VAISALA_______________________________________________________________________ 11
Version Information
Related Manuals
General Safety Considerations
Throughout the manual, important safety considerations are highlighted
as follows:
Table 1 Manual Revisions
Manual Code Description
U336en-1.1 March 1999 - First version
M010056en-A January 2001
M010056en-B March 2002
M010056en-C November 2002
M010056EN-D May 2004
M010056EN-E July 2005
M010056EN-F August 2006 - New measurement
probes and new transmitter housing
introduced.
M010056EN-G September 2007 - HUMICAP® 180R
added as a new sensor type. New
copies of certificates added in
Appendix Certificates on page 99.
Table 2 Related Manuals
Manual Code Manual Name
M210185EN-B Humidity Calibrator HMK15 User's
Guide
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.
User's Guide ______________________________________________________________________
12 __________________________________________________________________ M010056EN-G
Feedback
Vaisala Customer Documentation Team welcomes your comments and
suggestions on the quality and usefulness of this publication. If you find
errors or have other suggestions for improvement, please indicate the
chapter, section, and page number. You can send comments to us by e-
Product Related Safety Precautions
The Series HMT360 Transmitter delivered to you has been tested for
safety and approved as shipped from the factory. Note the following
precautions:
ESD Protection
Electrostatic Discharge (ESD) can cause immediate or latent damage to
electronic circuits. Vaisala products are adequately protected against
ESD for their intended use. However, it is possible to damage the
product by delivering electrostatic discharges when touching,
removing, or inserting any objects inside the equipment housing.
To make sure you are not delivering high static voltages yourself:
- Handle ESD sensitive components on a properly grounded and
protected ESD workbench. When this is not possible, ground
yourself with a wrist strap and a resistive connection cord to the
equipment chassis before touching the boards. When neither of the
above is possible, at least touch a conductive part of the equipment
chassis with your other hand before touching the boards.
NOTE
Note highlights important information on using the product.
WARNING
Ground the product, and verify outdoor installation grounding
periodically to minimize shock hazard.
CAUTION
Do not modify the unit. Improper modification can damage the
product or lead to malfunction.
Chapter 1 ________________________________________________________ General Information
VAISALA_______________________________________________________________________ 13
- Always hold the boards by the edges and avoid touching the
component contacts.
Recycling
Regulatory Compliances
The certifications that have been granted to the HMT360 Series, and the
accompanying safety factors, are listed in section Classification with
Current Outputs on page 81.
Copies of the certificates and wiring diagrams are provided in the
following appendices:
- Appendix B, Wiring for Intrinsically Safe Operation, FM, on page
95
- Appendix C, Wiring for Intrinsically Safe Operation, CSA, on
page 97
- Appendix D, Certificates, on page 99
Trademarks
HUMICAP
®
is a registered trademark of Vaisala.
License Agreement
All rights to any software are held by Vaisala or third parties. The
customer is allowed to use the software only to the extent that is
provided by the applicable supply contract or Software License
Agreement.
Recycle all applicable material.
Dispose of batteries and the unit according to statutory regulations.
Do not dispose of with regular household refuse.
User's Guide ______________________________________________________________________
14 __________________________________________________________________ M010056EN-G
Warranty
Vaisala hereby represents and warrants all Products
manufactured by Vaisala and sold hereunder to be free
from defects in workmanship or material during a
period of twelve (12) months from the date of delivery
save for products for which a special warranty is given.
If any Product proves however to be defective in
workmanship or material within the period herein
provided Vaisala undertakes to the exclusion of any
other remedy to repair or at its own option replace the
defective Product or part thereof free of charge and
otherwise on the same conditions as for the original
Product or part without extension to original warranty
time. Defective parts replaced in accordance with this
clause shall be placed at the disposal of Vaisala.
Vaisala also warrants the quality of all repair and
service works performed by its employees to products
sold by it. In case the repair or service works should
appear inadequate or faulty and should this cause
malfunction or nonfunction of the product to which the
service was performed Vaisala shall at its free option
either repair or have repaired or replace the product in
question. The working hours used by employees of
Vaisala for such repair or replacement shall be free of
charge to the client. This service warranty shall be
valid for a period of six (6) months from the date the
service measures were completed.
This warranty is however subject to following
conditions:
a) A substantiated written claim as to any alleged
defects shall have been received by Vaisala within
thirty (30) days after the defect or fault became known
or occurred, and
b) The allegedly defective Product or part shall, should
Vaisala so require, be sent to the works of Vaisala or to
such other place as Vaisala may indicate in writing,
freight and insurance prepaid and properly packed and
labelled, unless Vaisala agrees to inspect and repair the
Product or replace it on site.
This warranty does not however apply when the defect
has been caused through
a) normal wear and tear or accident;
b) misuse or other unsuitable or unauthorized use of
the Product or negligence or error in storing,
maintaining or in handling the Product or any
equipment thereof;
c) wrong installation or assembly or failure to service
the Product or otherwise follow Vaisala's service
instructions including any repairs or installation or
assembly or service made by unauthorized personnel
not approved by Vaisala or replacements with parts not
manufactured or supplied by Vaisala;
d) modifications or changes of the Product as well as
any adding to it without Vaisala's prior authorization;
e) other factors depending on the Customer or a third
party.
Notwithstanding the aforesaid Vaisala's liability under
this clause shall not apply to any defects arising out of
materials, designs or instructions provided by the
Customer.
This warranty is expressly in lieu of and excludes all
other conditions, warranties and liabilities, express or
implied, whether under law, statute or otherwise,
including without limitation any implied warranties of
merchantability or fitness for a particular purpose and
all other obligations and liabilities of Vaisala or its
representatives with respect to any defect or deficiency
applicable to or resulting directly or indirectly from the
Products supplied hereunder, which obligations and
liabilities are hereby expressly cancelled and waived.
Vaisala's liability shall under no circumstances exceed
the invoice price of any Product for which a warranty
claim is made, nor shall Vaisala in any circumstances
be liable for lost profits or other consequential loss
whether direct or indirect or for special damages.
Chapter 2 __________________________________________________________ Product Overview
VAISALA_______________________________________________________________________ 15
CHAPTER 2
PRODUCT OVERVIEW
This chapter introduces the features, advantages, and the product
nomenclature.
Introduction to Vaisala HUMICAP
®
Humidity and
Temperature Transmitter Series HMT360
Vaisala HUMICAP
®
Humidity and Temperature Transmitter Series
HMT360 contains reliable, microprosessor-based two-wire instruments
for measuring relative humidity and temperature in hazardous areas.
WARNING
In hazardous environments, the transmitters must always be connected
via galvanic isolators or Zener barriers.
User's Guide ______________________________________________________________________
16 __________________________________________________________________ M010056EN-G
0606-003
Figure 1 Vaisala HUMICAP
®
Humidity and Temperature
Transmitter Series HMT360
Output Quantities
Vaisala HUMICAP
®
Humidity and Temperature Transmitter Series
HMT360 is available either with or without a local display and with one
or two current output channels.
Available output quantities are listed in the table below:
Table 3 Output Quantities for Vaisala HUMICAP
®
Humidity and Temperature Transmitter Series
HMT360
Character Quantity Abbreviation Availability
0 relative humidity RH A, D
1 temperature T A, D, F, H
2 dewpoint
temperature
Td D
3 absolute humidity a D
4 mixing ratio x D
5wet bulb
temperature
Tw D
6mass
concentration of
water
ppmw H
7 water activity aw H, F
Chapter 2 __________________________________________________________ Product Overview
VAISALA_______________________________________________________________________ 17
Probe Options
The HMT360 series has various options for probes and cable lengths
(2 m, 5 m and 10 m). The available probe types are presented in the
figure below.
8 relative humidity
of saturation
RS H
9 saturation
temperature
Ts H
The characters used to indicate availability in the table above:
A = Available for HMT360 standard version
D = Available for HMT360 with optional calculations
F = Available for HMT360 Moisture and Temperature in oil
transmitter
H = Available for HMT360 Moisture and Temperature in Jet Fuel
transmitter
Table 3 Output Quantities for Vaisala HUMICAP
®
Humidity and Temperature Transmitter Series
HMT360
Character Quantity Abbreviation Availability
User's Guide ______________________________________________________________________
18 __________________________________________________________________ M010056EN-G
0603-036
Figure 2 Probe Options for Vaisala HUMICAP
®
Humidity
and Temperature Transmitter Series HMT360
The following numbers refer to Figure 2 on page 18:
1 = HMP361 probe for wall mounting
2 = HMP363 probe for tight spaces
3 = HMP364 probe for pressurized spaces up to 100 bars
4 = HMP365 probe for high temperatures up to 180 °C *) Flange
for HMP365 available as an option
5 = HMP367 probe for high humidities
6 = HMP368 probe for installations in pressurized pipelines up to
40 bars; features a pressure-tight sliding clasp nut
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Vaisala HUMICAP HMT361 User manual

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