Vaisala HUMICAP HMT361, HUMICAP HMT362, HUMICAP HMT363, HUMICAP HMT364, HUMICAP HMT365 User Manual
...
USER'S GUIDE
Vaisala HUMICAP® Humidity and Temperature
Transmitter Series HMT360
M010056EN-G
PUBLISHED BY
Vaisala Oyj Phone (int.): +358 9 8949 1
P.O. Box 26 Fax: +358 9 8949 2227
FIN-00421 Helsinki
Finland
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.
________________________________________________________________________________
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
VAISALA________________________________________________________________________ 1
________________________________________________________________________________
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
2 _______________________________________________________________________________
________________________________________________________________________________
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
VAISALA________________________________________________________________________ 3
________________________________________________________________________________
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
4 _______________________________________________________________________________
________________________________________________________________________________
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 HMT 360 . . . . . . . . . . . . . . . .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
VAISALA________________________________________________________________________ 5
________________________________________________________________________________
6 _______________________________________________________________________________
________________________________________________________________________________
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 HMT 36 0 . . . . . . . . . . . . . . . . . .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
VAISALA________________________________________________________________________ 7
________________________________________________________________________________
8 _______________________________________________________________________________
Chapter 1 _____________________________________________________ ___ General Information
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.
VAISALA________________________________________________________________________ 9
User's Guide ______________________________________________________________________
- 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.
10 __________________________________________________________________ M010056EN-G
Chapter 1 _____________________________________________________ ___ General Information
Version Information
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.
WARNING
CAUTION
Related Manuals
Table 2 Related Manuals
Manual Code Manual Name
M210185EN-B Humidity Calibrator HMK15 User's
Guide
General Safety Considerations
Throughout the manual, important safety considerations are highlighted
as follows:
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 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.
VAISALA_______________________________________________________________________ 11
User's Guide ______________________________________________________________________
NOTE
Note highlights important information on using the product.
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 email: manuals@vaisala.com.
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:
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.
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.
12 __________________________________________________________________ M010056EN-G
Chapter 1 _____________________________________________________ ___ General Information
- Always hold the boards by the edges and avoid touching the
component contacts.
Recycling
Recycle all applicable material.
Dispose of batteries and the unit according to statutory regulations.
Do not dispose of with regular household refuse.
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.
VAISALA_______________________________________________________________________ 13
User's Guide ______________________________________________________________________
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 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 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 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.
14 __________________________________________________________________ M010056EN-G
Chapter 2 __________________________________________________________ Product Overview
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.
VAISALA_______________________________________________________________________ 15
User's Guide ______________________________________________________________________
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
Character Quantity Abbreviation Availability
0 relative humidity RH A, D
1 temperature T A, D, F, H
2 dewpoint
3 absolute humidity a D
4 mixing ratio x D
5wet bulb
6mass
7 water activity aw H, F
®
Humidity and Temperature Transmitter Series
HMT360
Td D
temperature
Tw D
temperature
ppmw H
concentration of
water
16 __________________________________________________________________ M010056EN-G
Chapter 2 __________________________________________________________ Product Overview
Table 3 Output Quantities for Vaisala HUMICAP®
Humidity and Temperature Transmitter Series
HMT360
Character Quantity Abbreviation Availability
8 relative humidity
of saturation
9 saturation
temperature
RS H
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
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.
VAISALA_______________________________________________________________________ 17
User's Guide ______________________________________________________________________
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
18 __________________________________________________________________ M010056EN-G
Chapter 3 _____________________________________________________ __________ Installation
CHAPTER 3
INSTALLATION
This chapter provides you with information that is intended to help you
install this product.
General Installation Instructions
Mounting the Probe Cable in Gas Group IIC Spaces
NOTE
The following applies only to installation within the EU!
The following instructions shall be followed to fulfil the specifications
of the EN50284 for nonconductive layer of the probe cable:
- Never mount or handle the probe cable when hazardous gases are
present.
- For achieving a conductive shield, cover the probe cable with
conductive material like metal or conductive tape or mount the probe
cable in a metal conduit.
- Assure that the conductive shield fulfils requirements of the standard
EN50284 (resistance less than 1 GΩ) and make sure that it can not
come loose in any operation situation.
VAISALA_______________________________________________________________________ 19
User's Guide ______________________________________________________________________
WARNING
During the installation work of the probes in gas group IIC areas
(requiring category I devices), it has to be guaranteed that even in fault
cases sparks generated by impacts or friction on the surface of the
housing can never occur.
Selecting Location
Select a place with stable conditions for mounting the transmitter. Do
not expose the transmitter to direct sunlight or rain. A rain shield is
available and it is recommended for direct outdoor installations. When
mounting the probe, select a place representing the process conditions.
General Instructions for Probes with Cable
Mount the probes with a cable horizontally; this way, any water
condensing on the tube cannot flow onto the sensor.
0507-024
Figure 3 Horizontal Mounting of Probe
The following numbers refer to Figure 3 on page 20:
1 = To be sealed
2 = To be insulated
3 = Insulate the cable
4 = Let the cable hang loosely. This prevents condensed water
running to the sensor along the cable.
20 __________________________________________________________________ M010056EN-G
Chapter 3 _____________________________________________________ __________ Installation
When there is no alternative but to install the probe in the process
vertically, the point of entry must be carefully insulated. The cable must
also be allowed to hang loosely as this prevents any condensed water
from running onto the probe along the cable.
0507-022
Figure 4 Vertical Mounting of Probe
The following numbers refer to Figure 4 on page 21:
1 = To be sealed
2 = Insulate the cable
3 = To be insulated
4 = Let the cable hang loosely. This prevents condensed water
running to the sensor along the cable
If the process temperature is much higher than that of the environment,
the whole probe and preferably plenty of cable must be inside the
process. This prevents measuring inaccuracy caused by heat conduction
along the cable.
When mounted on the side of a duct or channel, the probe must be
inserted from the side of the duct. If this is not possible and the probe
must be inserted from the top, the point of entry must be carefully
insulated.
For Vaisala probe installation kits and some installation examples see
section Probe Mounting on page 25.
VAISALA_______________________________________________________________________ 21
User's Guide ______________________________________________________________________
Checking the Temperature Reading
The actual temperature of the process can be measured with a reference
instrument to be compared with the transmitter reading. The heat
transfer is less evident if you remove the protective filter of the sensor
for a short-term test. However, never use the sensor long periods
without the filter as this may cause a faster contamination of the sensor.
The transmitter fulfils the specified EMC regulations with the
protective filter on the probe.
In humidity measurement and especially in calibration and adjustment
it is essential that temperature of the probe and measuring environment
is the same. Even a small difference in temperature between the
environment and the probe causes an error. As the curve below shows,
if the temperature is +20 °C and the relative humidity 100 %RH, a
difference of ±1 °C between the environment and the probe causes an
error of ±6 %RH.
The graph below illustrates the measurement error at 100 %RH when
the difference between the ambient and sensor temperature is 1 °C.
0507-036
Figure 5 Measurement Error at 100 %RH
Mounting the Transmitter Housing
1. Attach the mounting plate to the wall with 4 screws.
2. Press down the transmitter so that it slides along the rails of the
mounting plate.
3. Fasten the transmitter to the mounting plate with the Allen screw
(3 mm Allen key provided).
22 __________________________________________________________________ M010056EN-G
Chapter 3 _____________________________________________________ __________ Installation
The probe can be detached and replaced when needed by simply
unfastening the two Allen screws.
0603-037
Figure 6 Transmitter Mounting
VAISALA_______________________________________________________________________ 23
User's Guide ______________________________________________________________________
0603-038
Figure 7 Parts of the Transmitter
The following numbers refer to Figure 7 on page 24:
1 = Electronics unit
2 = Probe; including a part of the measurement electronics (for
example, calibration memory)
3 = Flat cable
4 = Transmitter base
5 = Grounding terminal
6 = Protective covers
7 = Cable glands
8 = Probe
9 = RS232C connector
24 __________________________________________________________________ M010056EN-G
Chapter 3 _____________________________________________________ __________ Installation
Probe Mounting
CAUTION
Do not unsolder and then resolder the probe cable from and to the
printed board during installation.
Do not shorten or lengthen the probe cable.
These procedures may alter the humidity calibration of the transmitter.
HMP363 for Confined Spaces
The HMP363 is a small size (ø = 12mm) general-purpose probe suitable
for ducts and channels with the installation kit available from Vaisala.
The HMP363 provides for two measuring range options. The first probe
version is equipped with a flexible cable and can be used when
measuring in environments up to 80 ºC. The second version is suitable
for measuring in environments up to 120 ºC.
Section HMP363/365/367 Duct Installation Kit on page 26 shows
mounting of HMP363/367 with the optional duct installation kit.
VAISALA_______________________________________________________________________ 25
User's Guide ______________________________________________________________________
HMP363/365/367 Duct Installation Kit
0508-021
Figure 8 Installation of HMP363 Probe in Duct with Flange
and Supporting Bar
The following numbers refer to Figure 8 on page 26:
1 = Duct wall
2 = Flange
3 = Sealing ring
4 = Supporting bar
5 = Probe attaching part (to be fixed with supporting bar)
6 = RH probe
HMP364 for High-Pressure Applications
The probe is provided with a nut, a fitting screw and a sealing washer.
Keep the fitting screw and the nut in place on the body of the probe
during handling to prevent damage to the highly polished surface of the
probe. Follow the instructions below to achieve a leak-tight assembly.
CAUTION
26 __________________________________________________________________ M010056EN-G
In pressurized processed it is essential to tighten the supporting nuts
and screws very carefully to prevent loosening of the probe by the
action of pressure.
Chapter 3 _____________________________________________________ __________ Installation
1. Remove the fitting screw from the nut and the probe.
2. Fasten the fitting screw to the chamber wall with a sealing washer.
Tighten the fitting screw into the threaded sleeve with a torque
spanner. The tightening torque is 150 ± 10 Nm (110 ± 7 ft-lbs).
3. Insert the body of the probe into the fitting screw and tighten the
nut manually to the fitting screw.
4. Mark both the fitting screw and the nut hex.
5. Tighten the nut a further 30º (1/12) turn or if you have a torque
spanner tighten it with a torque of 80 ± 10 Nm (60 ± 7 ft-lbs).
6. Clean and grease the tightening cone of the fitting screw after every
tenth detachment. Change the sealing washer every time the fitting
screw is detached. Use high-vacuum grease, for example Dow
Corning, or a similar grease.
NOTE
When retightening the nut after detachment the nut must be tightened
without increased effort.
0505-272
Figure 9 HMP364 Probe Mounting
The following numbers refer to Figure 9 on page 27:
1 = Tightening cone
2=Nut
3 = Fitting screw, M22×1.5 or NPT 1/2"
4 = Sealing washer
5 = Probe; ø12 mm
VAISALA_______________________________________________________________________ 27
User's Guide ______________________________________________________________________
0505-273
Figure 10 Marking Nut and Fitting Screw
CAUTION
NOTE
0505-274
Figure 11 Cleaning the Tightening Cone
The following numbers refer to Figure 11 on page 28:
1 = Fitting screw
2 = Sealing washer
3 = Tightening cone
4 = Clean cotton stick
In pressurized processes it is essential to tighten the supporting nuts
and screws very carefully to prevent loosening of the probe by the
action of pressure.
When HMP364 is installed in a process with a pressure differing from
normal atmospheric pressure, please enter the pressure value of the
process (in bara) into the transmitter memory, see sections PRES
Setting Ambient Pressure for Calculations on page 56 and Setting the
Pressure for Calculations on page 46.
28 __________________________________________________________________ M010056EN-G
Loading...