Vaisala HUMICAP HMT360 SERIES User manual

USER'S GUIDE
Vaisala HUMICAP® Dewpoint and Temperature
Transmitter Series HMT360
M210744EN-C

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© Vaisala 2010
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binding commitments and agreements are included exclusively in the
applicable supply contract or Conditions of Sale.
Vaisala Oyj Phone (int.): [phone]
P.O. Box 26 Fax: [phone]
FIN-00421 Helsinki
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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
Documentation Conventions . . . . . . . . . . . . . . . . . . . . . . .11
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Regulatory Compliances . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
License Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
CHAPTER 2
PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Introduction to 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
Checking the Temperature Reading . . . . . . . . . . . . . . . . .20
Mounting the Transmitter Housing . . . . . . . . . . . . . . . . . . .21
Probe Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
HMP362 Small Pressure-Tight Probe . . . . . . . . . . . . . . . .24
HMP364 for High-Pressure Applications . . . . . . . . . . . . . .27
HMP368 for Pressurized Pipelines or Moisture in Liquids .29
Tightening the Clasp Nut . . . . . . . . . . . . . . . . . . . . . . . 31
Installing the HMP368 Probe Through a Ball
Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Installation in Hazardous Locations . . . . . . . . . . . . . . . . . .36
US and Canadian Requirements. . . . . . . . . . . . . . . . . 36
European Requirements . . . . . . . . . . . . . . . . . . . . . . . 36
CATEGORY 1 (Zone 0) . . . . . . . . . . . . . . . . . . . . . 36

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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 . . . . . . . . . 38
HMT360 Connected to a Zener Barrier . . . . . . . . . . . . 39
Examples of Connections . . . . . . . . . . . . . . . . . . . . . . 41
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
CHAPTER 4
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Local Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Power ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
DIP Switch Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Display/Keypad Commands . . . . . . . . . . . . . . . . . . . . . . . .48
Setting the Pressure for Calculations. . . . . . . . . . . . . . 48
Selecting Output Quantities . . . . . . . . . . . . . . . . . . . . . 49
Upper Half of Display . . . . . . . . . . . . . . . . . . . . . . . 49
Lower Half of Display . . . . . . . . . . . . . . . . . . . . . . . 50
Selecting Analog Outputs . . . . . . . . . . . . . . . . . . . . . . 50
Scaling Analog Outputs . . . . . . . . . . . . . . . . . . . . . . . . 51
Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Serial Communication Settings . . . . . . . . . . . . . . . . . . . . .53
Setting the Analog Outputs . . . . . . . . . . . . . . . . . . . . . . . .53
ASEL Selecting Analog Outputs . . . . . . . . . . . . . . . . . 53
S Scaling Analog Outputs . . . . . . . . . . . . . . . . . . . . . . 54
Adjustment Commands . . . . . . . . . . . . . . . . . . . . . . . . . . .55
CT Temperature Adjustment . . . . . . . . . . . . . . . . . . . . 55
Output Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
ITEST Testing Analog Outputs . . . . . . . . . . . . . . . . . . 56
SEND Outputting Measurement Values. . . . . . . . . . . . 57
R Activating Continuous Output. . . . . . . . . . . . . . . . . . 57
S Stopping Continuous Output . . . . . . . . . . . . . . . . . . 57
INTV Setting Output Interval . . . . . . . . . . . . . . . . . . . . 57
PRES Setting Ambient Pressure for Calculations . . . . 58
FILT Output Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Resetting the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . .59
RESET Transmitter Reset . . . . . . . . . . . . . . . . . . . . . . 59
CHAPTER 5
MEASURING AT OVERPRESSURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Pressure Regulator Recommended . . . . . . . . . . . . . . . . . .62
CHAPTER 6
CALIBRATION AND ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Calibration Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Factory Calibration and Adjustment . . . . . . . . . . . . . . . . . .63
Removing the Electronics Unit . . . . . . . . . . . . . . . . . . . . . .64
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Calculating Correspondence of Current Values and

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Output Quantities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
One-Point Temperature Adjustment . . . . . . . . . . . . . . . . . .67
ACAL Analog Output Calibration . . . . . . . . . . . . . . . . . . . .68
CHAPTER 7
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Periodical Checking and Cleaning . . . . . . . . . . . . . . . . . . .69
Transmitter Housing and Probe . . . . . . . . . . . . . . . . . . . . .69
Sintered Steel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
Sensor Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
CHAPTER 8
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Operation Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Analog Output Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
CHAPTER 9
TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Temperature (+ Operating Pressure Ranges) . . . . . . . . . .75
Moisture in Natural Gas . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Dewpoint Measurement. . . . . . . . . . . . . . . . . . . . . . . . 76
Calculated Variables Available (Typical Ranges) . . . . . . .77
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Classification with Current Outputs . . . . . . . . . . . . . . . . . .78
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . .80
APPENDIX A
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Transmitter Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
HMP362 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
HMP364 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
HMP368 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
Mounting Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
Rain Shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
Protection Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
APPENDIX B
WIRING FOR INTRINSICALLY SAFE OPERATION, FM . . . . . . . . . . . . .87

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APPENDIX C
WIRING FOR INTRINSICALLY SAFE OPERATION, CSA . . . . . . . . . . . .89
APPENDIX D
CERTIFICATES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

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List of Figures
Figure 1 HMT360 for Natural Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Figure 2 Probe Options for HMT360 for Natural Gas. . . . . . . . . . . . . . .17
Figure 3 Measurement Error at 100 %RH . . . . . . . . . . . . . . . . . . . . . . .21
Figure 4 Transmitter Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Figure 5 Parts of the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Figure 6 HMP362 Probe and HMP302SC Sampling Cell Dimensions. .24
Figure 7 HMP362 Installation (without Sampling Cell). . . . . . . . . . . . . .25
Figure 8 Optional Sampling Cell HMP302SC. . . . . . . . . . . . . . . . . . . . .26
Figure 9 HMP364 Probe Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 10 Marking Nut and Fitting Screw. . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 11 Cleaning the Tightening Cone . . . . . . . . . . . . . . . . . . . . . . . . .29
Figure 12 HMP368 Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Figure 13 Sealing of Fitting Body into Process . . . . . . . . . . . . . . . . . . . .31
Figure 14 Tightening the Clasp Nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Figure 15 Installing the HMP368 Probe Through a Ball Valve Assembly 33
Figure 16 HMT360 Connected to Galvanic Isolator. . . . . . . . . . . . . . . . .39
Figure 17 HMT360 Connected to a Zener Barrier . . . . . . . . . . . . . . . . . .40
Figure 18 STAHL 9160/13-11-11 (Galvanic Isolator). . . . . . . . . . . . . . . .41
Figure 19 STAHL 9001/51-280-091-141 (Zener Barrier) . . . . . . . . . . . . .42
Figure 20 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Figure 21 Local Display/Keypad Interface . . . . . . . . . . . . . . . . . . . . . . . .46
Figure 22 DIP Switch Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Figure 23 Detaching the Electronics Unit with Probe for Calibration
and Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Figure 24 Connecting Power Supply and Multimeter for Calibration . . . .65
Figure 25 Sensor Element is Located under the Filter. . . . . . . . . . . . . . .71
Figure 26 Effect of Process Temperature on Dewpoint Measurement
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Figure 27 VTT IECEx Certificate Page 1/4. . . . . . . . . . . . . . . . . . . . . . . .92
Figure 28 VTT IECEx Certificate Page 2/4. . . . . . . . . . . . . . . . . . . . . . . .93
Figure 29 VTT IECEx Certificate Page 3/4. . . . . . . . . . . . . . . . . . . . . . . .94
Figure 30 VTT IECEx Certificate Page 4/4. . . . . . . . . . . . . . . . . . . . . . . .95
Figure 31 VTT ATEX 028X Certificate Page 1/2 . . . . . . . . . . . . . . . . . . .96
Figure 32 VTT ATEX 028X Certificate Page 2/2 . . . . . . . . . . . . . . . . . . .97
Figure 33 VTT ATEX 028X Certificate Schedule . . . . . . . . . . . . . . . . . . .98
Figure 34 VTT ATEX 023X Certificate Page 1/2 . . . . . . . . . . . . . . . . . . .99
Figure 35 VTT ATEX 023X Certificate Page 2/2 . . . . . . . . . . . . . . . . . .100
Figure 36 FM Certificate of Compliance page 1/3 . . . . . . . . . . . . . . . . .101
Figure 37 FM Certificate of Compliance page 2/3 . . . . . . . . . . . . . . . . .102
Figure 38 FM Certificate of Compliance page 3/3 . . . . . . . . . . . . . . . . .103
Figure 39 CSA Certificate of Compliance. . . . . . . . . . . . . . . . . . . . . . . .104
Figure 40 TIIS Certificate of Compliance . . . . . . . . . . . . . . . . . . . . . . . .105
Figure 41 PCEC Conformity Certificate . . . . . . . . . . . . . . . . . . . . . . . . .106

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List of Tables
Table 1 Manual Revisions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Table 2 Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Table 3 Output Quantities for HMT360 for Natural Gas . . . . . . . . . . . . . .16
Table 4 HMP368 Probe Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Table 5 Pressure Conversion Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Table 6 Serial Communications Settings . . . . . . . . . . . . . . . . . . . . . . . . .53
Table 7 Pressure Conversion Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Table 8 Temperature Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Table 9 Dewpoint Measurement Specifications . . . . . . . . . . . . . . . . . . . .76
Table 10 Calculated Variables Specifications. . . . . . . . . . . . . . . . . . . . . . .77
Table 11 Output Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Table 12 General Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Table 13 Probe Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Table 14 Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

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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®Dewpoint and Temperature
Transmitter Series HMT360 for Natural Gas.
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.
- Chapter3, Installation:This chapterprovides youwith 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.

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10 __________________________________________________________________ M210744EN-C
- 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
Documentation Conventions
Throughoutthe manual, importantsafety considerationsarehighlighted
as follows:
Table 1 Manual Revisions
Manual Code Description
M210744EN-C This manual. April 2010 - Updated
Appendix Certificates on page 91.
M210744EN-B Previous version. September 2007 -
New copies of certificates added in
Appendix Certificates on page 91.
Updated list of options and
accessories.
Table 2 Related Manuals
Manual Code Manual Name
M210185EN 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.
NOTE Note highlights important information on using the product.

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12 __________________________________________________________________ M210744EN-C
Safety
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 an ESD workbench is not available, ground yourself to the
equipment chassis with a wrist strap and a resistive connection
cord.
- If you are unable to take either of the above precautions, touch a
conductive part of the equipment chassis with your other hand
before touching ESD sensitive components.
- Always hold component boards by the edges and avoid touching
the component contacts.
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
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 78.
Copies of the certificates and wiring diagrams are provided in the
following appendices:
-Appendix B, Wiring for Intrinsically Safe Operation, FM, on page
87
-Appendix C, Wiring for Intrinsically Safe Operation, CSA, on
page 89
-Appendix D, Certificates, on page 91
Trademarks
Vaisala HUMICAP®is a registered trademark of Vaisala Oyj.
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 __________________________________________________________________ M210744EN-C
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.
Warranty
For certain products Vaisala normally gives a limited one-year
warranty. Visit our Internet pages for more information and our
standard warranty terms and conditions: www.vaisala.com/services/
warranty.html.
Please observe that any such warranty may not be valid in case of
damage due to normal wear and tear, exceptional operating conditions,
negligent handling or installation, or unauthorized modifications.
Please see the applicable supply contract or Conditions of Sale for
details of the warranty for each product.

Chapter 2 __________________________________________________________ Product Overview
VAISALA_______________________________________________________________________ 15
CHAPTER 2
PRODUCT OVERVIEW
This chapter introduces the features, advantages, and the product
nomenclature.
Introduction to HMT360
Vaisala HUMICAP®Dewpoint and Temperature Transmitter Series
HMT360 for Natural Gas contains reliable, microprosessor-based two-
wire instruments for measuring moisture in natural gas in hazardous
areas.

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16 __________________________________________________________________ M210744EN-C
0606-004
Figure 1 HMT360 for Natural Gas
Output Quantities
Vaisala HUMICAP®Dewpoint and Temperature Transmitter Series
HMT360 for Natural Gas comes equipped with a local display and with
one or two current output channels.
Available output quantities are listed in the table below:
WARNING In hazardous environments,the transmittersmust always be connected
via galvanic isolators or Zener barriers.
Table 3 Output Quantities for HMT360 for Natural Gas
Character Quantity Abbreviation
1 temperature T
2 dewpoint temperature Td
6 volume concentration ppmv
A water content w

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.
0603-035
Figure 2 Probe Options for HMT360 for Natural Gas
The following numbers refer to Figure 2 on page 17:
1 = HMP362 probe for pressurized spaces up to 167 bars
2 = HMP364 probe for pressurized spaces up to 100 bars
3 = HMP368 probe for installations in pressurized pipelines up to
40 bars; features a pressure-tight sliding clasp nut

User's Guide ______________________________________________________________________
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