Vaisala HUMICAP HMT361, HUMICAP HMT362, HUMICAP HMT363, HUMICAP HMT364, HUMICAP HMT365 User Manual

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USER'S GUIDE

Vaisala HUMICAP® Humidity and Temperature

Transmitter Series HMT360

M010056EN-G

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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.

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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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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

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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

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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

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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

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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

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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.

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- 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.

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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.

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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.

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- 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

- 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.

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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.

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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.

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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

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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.

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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

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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.

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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.

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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.

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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).

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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

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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

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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.

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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.

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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

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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.

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Chapter 3 _____________________________________________________ __________ Installation

HMP365 for High Temperatures

HMP365 is installed similarly to the HMP363 probe but without the supporting bar. Refer to HMP363/365/367 Duct Installation Kit on page

26 for more information on the duct installation kit for HMP365.

To avoid incorrect humidity readings, there must not be significant temperature differences between the inside and outside of the duct.

0505-271

Figure 12 Mounting HMP365 Probe in Duct or Channel

The following numbers refer to Figure 12 on page 29: 1 = A plugged hole for reference measurements 2 = Probe 3 = Mounting flange

HMP367 for High Humidities

The HMP367 is for environment where relative humidity is very high, near saturation.

Section HMP363/365/367 Duct Installation Kit on page 26 shows mounting of HMP363/367 with the optional duct installation kit.

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User's Guide ______________________________________________________________________

HMP368 for Pressurized Pipelines or Moisture in Liquids

Due to the sliding fit the HMP368 is easy to install into and remove from a pressurized process. The probe is especially suitable for measurements inside pipelines. See section Installing the HMP368

Probe Through a Ball Valve Assembly on page 32.

CAUTION

NOTE

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 HMP368 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.

0603-013

Figure 13 HMP368 Probe

The following numbers refer to Figure 13 on page 30: 1 = Clasp nut, 24 mm hex nut 2 = Fitting body, 27 mm hex nut

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Chapter 3 _____________________________________________________ __________ Installation

The following two fitting body options are available:

- Fitting Body ISO1/2 solid structure

- Fitting Body NPT1/2 solid structure

Table 4 HMP368 Probe Dimensions

Probe Type Probe Length Adjustment Range

Standard 178mm 120 mm Optional 400 mm 340 mm

CAUTION

Take care not to damage the probe body. A damaged body makes the probe head less tight and may prevent it from going through the clasp nut.

0507-025

Figure 14 Sealing of Fitting Body into Process

Tightening the Clasp Nut

1. Adjust the probe to a suitable depth according to the type of installation.

2. Tighten the clasp nut first manually.

3. Mark the fitting screw and the clasp nut.

4. Tighten the nut a further 50 ... 60° (ca. 1/6 turn) with a fork spanner. If you have a suitable torque spanner, tighten the nut to 45 ± 5 Nm (33 ± 4 ft-lbs).

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User's Guide ______________________________________________________________________

NOTE

0505-276

Figure 15 Tightening the Clasp Nut

The following numbers refer to Figure 15 on page 32: 1 = Probe 2 = Clasp nut 3 = Fitting screw 4=Pen

Take care not to tighten the clasp nut more than 60° to avoid difficulties when opening it.

Installing the HMP368 Probe Through a Ball Valve Assembly

The ball valve installation kit (Vaisala order code: BALLVALVE-1) is preferred when connecting the probe to a pressurized process or pipeline. Use the ball valve set or a 1/2" ball valve assembly with a ball hole of ø14 mm or more. If you install the probe (ø12 mm) in a process pipe, please note that the nominal size of the pipe must be at least 1 inch (2.54 cm). Use the manual press handle to press the probe into the pressurized (< 10 bar) process or pipeline.

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Chapter 3 _____________________________________________________ __________ Installation

NOTE

0505-277

Figure 16 Installing the HMP368 Probe Through a Ball Valve

Assembly

The numbers below refer to Figure 16 on page 33: 1 = Manual press tool 2 = Handle of the ball valve 3 = Probe 4 = Process chamber/pipeline 5 = Groove on the probe indicating the upper adjustment limit 6=Filter 7 = Ball of the ball valve

The probe can be installed in the process through the ball valve assembly provided that the process pressure is less than 10 bar. This way, the process does not have to be shut down when installing or removing the probe. However, if the process is shut down before removing the probe, the process pressure can be max. 20 bar.

NOTE

When measuring temperature dependent quantities make sure that the temperature at the measurement point is equal to that of the process, otherwise the moisture reading may be incorrect.

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User's Guide ______________________________________________________________________

Follow the steps below to install the HMP368 probe through a ball valve assembly. After the installation, the probe should be sitting in the process chamber or pipeline as shown in Figure 16 on page 33.

1. Shut down the process if the process pressure is more than 10 bars. If the pressure is lower there is no need to shut down the process.

2. Close the ball valve.

3. Seal the threads on the fitting body; refer to Figure 14 on page 31.

4. Attach the fitting body to the ball valve and tighten it.

5. Slide the clasp nut of the probe toward the filter, as far as it will go.

6. Insert the probe to the fitting body, and manually tighten the clasp nut to the fitting body.

7. Open the ball valve.

8. Push the probe through the ball valve assembly into the process. If the pressure is high, use the pressing handle that is provided with the probe. If you push the probe hard without using the handle, you may damage the cable.

NOTE

Note that the probe must be pushed so deep that the filter is completely inside the process flow.

9. Mark the fitting screw and the clasp nut.

10. Tighten the clasp nut with a fork spanner a further 50 ... 60º (ca. 1/ 6 turn). If you have a suitable torque spanner, tighten the nut to max 45 ± 5 Nm (33 ± 4 ft-lbs). Refer to Figure 15 on page 32.

Take care not to tighten the clasp nut more than 60° to avoid difficulties when opening it.

If you wish to remove the probe from the process, note that you have to pull the probe out far enough. You cannot close the valve if the groove on the probe body is not visible.

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Chapter 3 _____________________________________________________ __________ Installation

Electrical Connections

Refer to local requirements regarding cabling, grounding and galvanic isolator or barrier connections.

WARNING

Connect the transmitter always via galvanic isolators or Zener barriers in hazardous environments.

Be sure that the main power switch of the transmitter is set off before making any electrical installations in hazardous areas.

1. Open the transmitter cover and remove the protective cover of the transmitter base.

2. Thread the power supply wires through the cable gland, see Figure

7 on page 24.

3. Connect the unpowered power supply wires to the connectors: Ch 1 (humidity) and Ch 2 (temperature). Both channels require an own power supply.

4. Replace the protective cover. Turn the transmitter on ON with the ON/OFF switch, see Figure 24 on page 62.

5. Close the cover. The transmitter is ready for use.

NOTE

As Ch 1 is a main output, the transmitter does not operate if only Ch 2 is connected (Ch 2 is optoisolated from transmitter electronics).

When using the transmitter in hazardous locations, the use of galvanic isolators or barriers is essential. The following barrier & isolator are available in Vaisala: barrier No. 210664 (STAHL 9001/51-280-091-

141) and galvanic isolator No. 212483 (STAHL 9160/13-11-11).

Examples of connections and more information on installation in hazardous locations is given in section Examples of Connections on

page 41.

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User's Guide ______________________________________________________________________

Installation in Hazardous Locations

US and Canadian Requirements

USA (FM): Wiring for intrinsically safe operation is shown in

Appendix B, Wiring for Intrinsically Safe Operation, FM, on page 95.

Canada (CSA): Wiring for intrinsically safe operation is shown in

Appendix C, Wiring for Intrinsically Safe Operation, CSA, on page 97.

European Requirements

CATEGORY 1 (Zone 0)

HMT360 has to be connected to Exia-certified associated apparatus with galvanic isolation, gas group IIB or IIC.

NOTE

If both analog outputs are in use, the Ch 1 (-) and Ch 2 (-) must be short circuited (see Figure 19 on page 41).

CATEGORY 2 or 3 (Zone 1 or 2)

HMT360 has to be connected either to a Zener barrier or galvanic isolator

If both analog outputs are in use with a galvanic isolator, the Ch 1 (-) and Ch 2 (-) must be short circuited (see Figure 19 on page 41).

Figure 17 on page 39 and Figure 18 on page 40 present examples of

galvanic isolators and Zener barrier connections (only Ch 1 connected).

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Chapter 3 _____________________________________________________ __________ Installation

Maximum Cable Resistance Calculation for the Barrier (Vaisala Order Code: 210664)

General specifications of HMT360:

Supply voltage Uin = 24 V (12 ... 35 V) Maximum current I Minimum operating voltage for

= 20 mA

out

= 12 V (15 V with serial port)

min

HMT360

Stahl 9001/51-280-091-141 (values taken from the specifications):

Rated operating voltage U Transmitter supply voltage U

= 20 ... 35 V

= UN - 9.5 V, when

UN≤ 23.5 V or US = 14 V, when UN≥ 23.5 V

Maximum load RL≤ 350 Ω

Calculation of the maximum cable length from barrier to transmitter:

Cable resistance (as an example) R

= 0.085 Ω/m/core (2 ×

cable

0.085 Ω/m/pair)

If assuming that the operating voltage would be ≥ 24 V, the maximum acceptable voltage drop U

= US - U

drop

= 14 V - 12 V = 2 V

drop

min

in cables is:

drop

We also know that: I

= 20 mA

out

and that total resistance of the cable R

cabletot

multiplied with the total maximum length of the cables l

VAISALA_______________________________________________________________________ 37

cabletot

= R

cable

× l

max

is cable resistance R

max

cable

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User's Guide ______________________________________________________________________

From these facts the following equation can be formed: U

drop

= R

cabletot

× I

out

NOTE

2 = 2 × 0.085 Ω/m × l

= 2 V / (20 mA × 2 × 0.085 Ω/m)

max

= 588 m = 1930 ft, maximum cable length.

max

× 20 mA

max

If longer cable length is required, use of the galvanic isolators is recommended if possible.

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Chapter 3 _____________________________________________________ __________ Installation

HMT360 Connected to a Galvanic Isolator

HAZARDOUS AREA SAFE AREA

a) current si

0505-278

nal controller

HAZARDOUS AREA SAFE AREA

b) volta

0505-279

Figure 17 HMT360 Connected to Galvanic Isolator

e signal controller

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User's Guide ______________________________________________________________________

HMT360 Connected to a Zener Barrier

HAZARDOUS AREA SAFE AREA

0505-280

a) current signal controller

0505-281

Figure 18 HMT360 Connected to a Zener Barrier

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Chapter 3 _____________________________________________________ __________ Installation

Examples of Connections

0505-282

Figure 19 STAHL 9160/13-11-11 (Galvanic Isolator)

0505-283

Figure 20 STAHL 9001/51-280-091-141 (Zener Barrier)

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Grounding

When grounding the transmitter, follow the local requirements. Use at least 4 mm2 grounding cable when grounding the transmitter or barrier.

Note that the allowed resistance between barrier and system ground must be less than 1 ohm. Use ground terminal located inside or outside of transmitter Figure 21 on page 42:

HAZARDOUS AREA SAFE AREA

0505-284

Figure 21 Grounding

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Chapter 4 ________________________________________________________________ Operation

CHAPTER 4

OPERATION

This chapter contains information that is needed to operate this product.

Local Interface

HMT360 transmitter has four pushbuttons located on the housing cover. The transmitter can be ordered either with or without a local display. The display/keypad commands (see Display/Keypad Commands on

page 46) can be used to scale the outputs and select special output

quantities (if the transmitter configuration includes special output quantities). The optional display shows the measurement results.

The keypad pushbuttons are indicated (from left to right) as C, Up, Dn, and E (see Figure 22 on page 44):

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0603-039

Figure 22 Local Display/Keypad Interface

WARNING

Power ON/OFF

Open the transmitter cover and flip the internal power switch to position ON (up), see Figure 24 on page 62.

Avoid static discharge. Always use a wet cloth for wiping the display.

HMT360 with Display

Measurement readings appear on the display after switching power ON. The analog output signals can be read from the system or load resistor.

Avoid static discharge. Always use a wet cloth for wiping the display.

HMT360 without Display

If the transmitter does not have a display, the red LED indicator on the cover indicates various phases of calibration and possible errors. In normal operation it is not lit. If the LED is lit and all calibration or test DIP switches are disabled, it is an indication of an internal error.

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Chapter 4 ________________________________________________________________ Operation

Otherwise, the LED indicates the following:

- LED blinking = calibration of the dry end (offset).

- LED lit = calibration of the wet end (gain).

NOTE

If calibration is concluded but DIP switch settings are not restored, the LED indicator keeps blinking.

DIP Switch Functions

The table below is also printed on the protection board:

0505-285

Figure 23 DIP Switch Functions 1: Analog output test on/off

If you turn the switch to on position (up), you can force the outputs to states 4 mA, 12 mA and 20 mA by pressing buttons Up and Dn on the cover. Outputs return to normal mode when switch is turned down.

2: Calibration Disabled/Enabled

The EEPROMs are write protected. If this switch is in the disabled position (down), it does not allow any calibrations or scalings.

NOTE

VAISALA_______________________________________________________________________ 45

Keep this switch always in the disabled position during normal use of the transmitter.

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User's Guide ______________________________________________________________________

3 and 4: Calibration rh, t, analog

With these combinations you can perform relative humidity, temperature or analog output calibrations with a multimeter or with the transmitter display unit. Turn the DIP switches to the desired position according to the table printed on the protective cover.

5: Output quantities

Determines whether the output units are metric (down) on non-metric.

6, 7 and 8: Select output quantities

With the three DIP switches on the right, you can select the output quantities according to the table printed on the right side of the protective cover. Note that only the ordered quantities can be selected. The special option gives you the choice of setting any ordered quantity to each channel.

NOTE

Always restore the DIP switch settings after having tested the analog outputs or performing the calibration.

Display/Keypad Commands

Chapter 6, Calibration and Adjustment, on page 61 describes

separately display/keypad commands for calibration and adjustment.

Setting the Pressure for Calculations

In humidity transmitters, ambient pressure is used for the mixing ratio and wet bulb calculations.

To modify the pressure settings, turn the internal Calibration Enabled/ Disabled DIP switch of the transmitter to position Enabled (up). Press button C on the display cover: text "SCAL" appears on the display. Then press button E until the following display appears (the numeric value is always the existing setting, in this example 1.0):

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Chapter 4 ________________________________________________________________ Operation

0505-087

Adjust the pressure reading with buttons Up and Dn. Acknowledge the value with button E. To complete the pressure setting, turn the dip switch back to position disabled (down).

See the pressure conversion table on page Table 6 on page 56.

Selecting Output Quantities

Upper Half of Display

To modify the displayed quantity, turn the Calibration Enabled/ Disabled DIP switch of the transmitter to position Enabled (up). Select

the required quantity with button Up on the display cover, and acknowledge the value with button E. To complete the selections, turn the DIP switch back to position disabled (down).

Character Quantity Abbreviation Availability Metric Unit Nonmetric Unit

0 relative humidity RH A, D %RH %RH 1 temperature T A, D, F, H °C °F 2 dewpoint

temperature

3 absolute humidity a D 4 mixing ratio x D g/kg gr/lb

5 wet bulb

temperature

6mass

concentration of

water 7 water activity aw H, F 0 ... 1 0 ... 1 8 relative humidity

of saturation 9 saturation

temperature

Td D °C °F

g/m

Tw D °C °F

ppmw H ppm

RS H %RS %RS

Ts H °C °F

gr/ft

ppm

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transmitter

H = Available for HMT360 Moisture and Temperature in Jet Fuel

transmitter

Lower Half of Display

The output quantities metric/non metric DIP switch can be used to select between °C and °F.

It is possible to check the pressure setting of the transmitter by pressing button Dn. To return to the temperature reading, press button Dn again.

Selecting Analog Outputs

You can select the output quantities for channels 1 and 2 by turning the Calibration Enabled/Disabled DIP switch of the transmitter to position Enabled (up) and the three output selection DIP switches to position special (all up).

Press button C on the display cover: text "SCAL" appears on the display. Then press button E until the following display appears:

0505-288

The characters on the second line of the display in this menu correspond to the quantities according to the table in section Selecting Output

Quantities on page 47.

Select the quantity for Ch 1 with buttons Up and Dn and acknowledge the selection with button E.

If the transmitter is equipped with two analog channels, select the quantity for Ch 2 in the same way, for example:

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0505-289

Press button C to exit the display command mode or continue by setting the pressure.

NOTE

Remember to restore the DIP switch settings.

Scaling Analog Outputs

Turn the internal Calibration Enabled/Disabled DIP switch of the transmitter to upward position (on). Press button C on the display cover and a text similar to the following appears:

0505-290

Numbers on the second line indicate the low end scaling of Ch 1 currently stored in the transmitter memory. The text "Set Lo" on the lower left corner indicates that you can now change the low end scaling with buttons Up and Dn. Acknowledge the value with button E and a text similar to the following appears:

0505-291

Numbers on the second line indicate the high end scaling of Ch 1. The text "Set Hi" on the lower left-hand corner indicates that you can now change the high end scaling with buttons Up and Dn. Acknowledge with button E.

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If there is another channel available, the display shifts to the scaling menu of Ch 2. You can now scale the analog outputs for the Ch 2 in the same way as described above.

Press button C to exit the display command mode or continue by selecting the output quantities. This menu starts automatically after the scaling menu only if the output selection DIP switches are on the position special (all up) from the beginning.

NOTE

Remember to restore the DIP switch settings.

Serial Interface

WARNING

NOTE

The serial interface MUST NOT be used in hazardous areas.

Use the serial interface for calibration and testing purposes in safe areas only. Always use the serial interface cable (optional accessory, Vaisala order code: 25905ZZ). Connect one end of the cable to the serial port of your computer and the other to the connector marked "RS232C" on the electronics unit of the transmitter (see Figure 7 on page 24).

With serial communication the current consumption increases approximately to 7 mA and the transmitter is not able to operate with 4 mA. Therefore, it is recommended to use serial communication only temporarily for changing settings or for calibrating the transmitter in a safe area. With serial port, the minimum supply voltage is 15 VDC.

NOTE

50 __________________________________________________________________ M010056EN-G

The transmitter incorporates a serial interface detector. However, not all terminals or PC serial ports (for example, optoisolated or ports not meeting RS232C standards) recognize this standard. If the communication is not possible via a serial interface, use a forced activation by pressing simultaneously buttons Up and E on the transmitter cover. To deactivate the forced activation, press these buttons again or reset the transmitter. If the transmitter does not receive any commands for half an hour, it automatically closes the serial communication.

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Chapter 4 ________________________________________________________________ Operation

Serial Communication Settings

Table 5 Serial Communications Settings

Parameter Value

bauds 2400 parity none data bits 8 stop bits 1

CAUTION

When using the serial interface, be sure that power supply and serial interface are not connected to the same ground (use a floating power supply or hand-held serial interface device).

To start issuing commands, make sure that HMT360 is connected to a serial port of your computer and that the terminal session is open. Issue commands by typing them on your computer according to the following instructions. In these commands, <cr> stands for pressing Enter (on your computer keyboard).

Setting the Analog Outputs

ASEL Selecting Analog Outputs

Syntax: ASEL [xxx yyy]<cr>

where xxx = Quantity of Ch 1 yyy = Quantity of Ch 2

Turn the internal DIP switch Calibration Enabled/Disabled to position ON before the selecting the analog outputs and return it to position OFF after making the selection. Output quantities and their abbreviations are listed in the following table:

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Character Quantity Abbreviation Availability Metric Unit Nonmetric Unit

0 relative humidity RH A, D %RH %RH 1 temperature T A, D, F, H °C °F 2 dewpoint

temperature

3 absolute humidity a D 4 mixing ratio x D g/kg gr/lb

5 wet bulb

temperature

6 mass

concentration of

water 7 water activity aw H, F 0 ... 1 0 ... 1 8 relative humidity

of saturation 9 saturation

temperature

Td D °C °F

g/m

Tw D °C °F

ppmw H ppm

RS H %RS %RS

Ts H °C °F

gr/ft

ppm

Example:

>asel rh t<cr>

Ch1 RH lo : 0.00 %RH Ch1 RH hi : 100.00 %RH Ch2 T lo: -40.00 ’C Ch2 T hi: 100.00 ’C >

S Scaling Analog Outputs

Syntax: Szz aa.a bb.b<cr>

where zz = Quantity (RH, T, Td, x, a, Tw, ppm, aw, RS, Ts) aa.a = Lower limit of the quantity bb.b= Upper limit of the quantity

Turn the internal DIP switch Calibration Enabled/Disabled to position ON before the scaling the analog outputs and return it to position OFF after scaling.

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Chapter 4 ________________________________________________________________ Operation

Example:

>srh 0 100<cr> RH lo: 0.00 %RH RH hi: 100.00 %RH >

Adjustment Commands

Turn the internal DIP switch Calibration Enabled/Disabled to position ON before the adjustment and return it to position OFF after the adjustment.

CRH Relative Humidity Adjustment

NOTE

Read also the calibrator, for example HMK15, manual and refer to page 19 of that manual for more detailed instructions on salt bath calibration and adjustment.

Syntax: CRH<cr> The transmitter asks and measures relative humidity and calculates the

calibration coefficients.

Example:

>crh<cr> RH : 1.82 1. ref ? 0<cr> Press any key when ready ...<cr> RH : 74.222 2. ref ? 75<cr> OK >

The OK indicates that the adjustment was succesful.

CT Temperature Adjustment

Syntax: CT<cr> The transmitter asks and measures temperature readings and calculates

the calibration coefficients.

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Example:

>ct<cr> T : 0.811 1. ref ? 0.5<cr> Press any key when ready ...<cr> T : 99.122 2. ref ? 99.5<cr> OK >

The OK indicates that the adjustment was succesful. When performing one-point adjustment press only Enter for the second reference.

Output Commands

ITEST Testing Analog Outputs

NOTE

Before giving command ITEST, reset the transmitter with command RESET, see section RESET Transmitter Reset on page 57.

Syntax: ITEST aa.aaa bb.bbb<cr>

where aa.aaa = Current value to be set for Ch 1 (mA) bb.bbb = Current value to be set for Ch 2 (mA)

This command outputs the current value of each channel and the corresponding control signal of the digital-to-analog converter.

Example:

>itest 8 12<cr>

8.00000 403 12.00000 7DF >itest<cr>

7.00150 30A 11.35429 73E >

The set current values remain valid until you issue the command ITEST without readings or reset the transmitter. With this command the desired outputs of the transmitter are shown.

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Chapter 4 ________________________________________________________________ Operation

NOTE

When outputting low currents from Ch 1, remember to remove RS232C-cable while reading the current output, because of the increased current consumption for using RS port.

SEND Outputting Measurement Values

Syntax: SEND<cr> This command outputs the measured values in one point.

R Activating Continuous Output

Syntax: R<cr> With the command R the transmitter outputs measured values

continuously.

S Stopping Continuous Output

Syntax: S<cr> The continuous outputting is stopped with the command S. If outputting

is active, this command is not echoed.

INTV Setting Output Interval

Syntax: INTV n xxx<cr>

where n = 1 ... 255 xxx = S, MIN or H

Sets the output interval when the transmitter outputs measurement readings. The time interval is used when the continuous output is active.

Example, the output interval is set to 10 minutes:

>intv 10 min<cr> Output interval: 10 MIN >

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PRES Setting Ambient Pressure for Calculations

Syntax: PRES aaaa.a<cr>

where aaaa.a = Pressure (bar

)

Turn the internal DIP switch Calibration Enabled/Disabled to position ON before setting the pressure and return it to position OFF after making the setting.

Example:

>pres 12<cr> Pressure : 12.0 bara >

Table 6 Pressure Conversion Chart

FROM hPa/mbar mmHg/Torr inHg atm bar psi

hPa/ mbar

TO mmHg/

Torr inHg 0.02952999 0.03937008 1 29.921 29.52999 2.036021 atm 0.00098692 0.00131597 0.033422 1 0.98692 0.068046 bar 0.001 0.001333224 0.03386388 1.01325 1 0.06894757 psi 0.01450377 0.01933678 0.4911541 14.6962 14.50377 1

1 1.333224 33.86388 1013.25 1000 68.94757

0.7500617 1 25.40000 760 750.0617 51.71493

Example:

29.9213 inHg = 29.9213 × 33.86388 = 1013.25 hPa / mbar

NOTE

56 __________________________________________________________________ M010056EN-G

Conversions from mmHg and inHg are defined at 0 °C.

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Chapter 4 ________________________________________________________________ Operation

FILT Output Filtering

Syntax: FILT a.aaa<cr>

where a.aaa = 0.1 ... 1

1=No filtering

0.5 = Average of last two measurements

0.1 = Average of ca. 16 measurements

This commands sets the measurement result filtering.

Example:

>filt 1<cr> Filter : 1.0000 >filt 0.5<cr> Filter : 0.5000 >filt 0.1<cr> Filter : 0.1000 >

Resetting the Transmitter

RESET Transmitter Reset

Syntax: RESET<cr> This command resets the device.

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Chapter 5 __________________________________________________ Measuring at Overpressure

CHAPTER 5

MEASURING AT OVERPRESSURE

This chapter provides you with important information concerning measurement in conditions with pressure higher than the normal atmospheric pressure.

The probes HMP364 and HMP368 are designed for humidity measurement at overpressure. The maximum measurement pressures depend on the probe as follows:

HMP364: 0 ... 100 bar (10 MPa), for pressurized rooms and

processes, probe is provided with a nut, fitting screw and sealing washer

HMP368: 0 ... 40 bar (4 MPa), for pressurized pipelines, ball

valve set available

The accuracy of the dewpoint measurement is affected by pressure in the measurement chamber. The actual pressure in the sampling cell is required to be set to the transmitter by using the serial line command PRES (see section PRES Setting Ambient Pressure for Calculations on

page 56 or by using the keypad commands, see section Setting the Pressure for Calculations on page 46).

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Pressure Regulator Recommended

When sampling pressurized processes exceeding the maximum measurement pressure of the probe, the pressure in the measurement chamber must be regulated to the acceptable level or below. It is recommended to use pressure regulator before the measurement chamber to prevent remarkable pressure variations.

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Chapter 6 __________________________________________________ Calibration and Adjustment

CHAPTER 6

CALIBRATION AND ADJUSTMENT

This chapter contains instructions for checking the calibration and adjusting this product.

In this User's Guide the term "calibration" refers to comparing the device's reading against a reference concentration. "Adjustment" refers to changing the device's reading to correspond to the reference concentration.

Calibration Interval

HMT360 is calibrated as shipped from the factory. Typical calibration interval is one year. In demanding applications it may be advisable to make the first calibration check earlier.

Factory Calibration and Adjustment

The device (or the probe only) can be sent to Vaisala Service Centers for calibration and adjustment, see Vaisala Service Centers on page 75 for contact information.

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User Calibration and Adjustment

Calibration and adjustment is carried out by using the keypad or by using serial commands. The following additional equipment is needed in adjustment of HMT360:

- a power supply for the channel(s) to be calibrated (12 ... 24 VDC),

- a multimeter for HMT360 without a display, and

- the calibrated references. First, the electronics unit is removed from the transmitter base to

perform the calibration and adjustment in safe area. Second, the power supply and a multimeter is connected to the electronics unit according to the following instructions.

Removing the Electronics Unit

0603-040

Figure 24 Detaching the Electronics Unit with Probe for

Calibration and Adjustment

1. Unfasten the screws and open the cover.

2. Switch the transmitter off with the ON/OFF switch.

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Chapter 6 __________________________________________________ Calibration and Adjustment

3. Disconnect the flat cable by lifting it carefully, for example with a screwdriver.

4. Remove the two screws holding the hinge support. Remove the hinge support.

5. Turn the electronics unit slightly upwards to release it from the hinges. Leave the transmitter base with the cable connections on place. When putting the electronics unit back to place, attach the upper hinge first. Remember to attach the hinge support.

Connections

Off

0505-293

Figure 25 Connecting Power Supply and Multimeter for

Calibration

1. Connect a power supply (12 ... 24 VDC, with a serial port the minimum supply voltage is 15 VDC ) to the terminals B1 (-) and C1 (+) (Ch 1) with banana plugs, see Figure 25 on page 63.

2. Connect the multimeter in series with the supply, B1 (-) and A1 (+).

3. Follow the same procedure with Ch 2 using the terminals B2 (-) and C2 (+). When calibrating both channels at the same time, use two galvanically separated power supplies.

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You can now calibrate or check the humidity and temperature or the analog outputs according to the instructions given in this chapter.

If the current measurement is needed in a hazardous area, the multimeter is connected to the terminals A1/A2 (+) and B1/B2 (-). Use only an approved multimeter.

WARNING

The power supply connectors (C1 and C2) MUST NOT be used in hazardous areas. For calibration and adjustment in a hazardous area use only an approved multimeter, which fulfills the safety factors printed on the protective cover.

Calculating Correspondence of Current Values and Output Quantities

When using HMT360 without a display, calibration and adjustment is carried out by using a multimeter. Use the following equations to calculate the current values corresponding to the reference output quantities.

–

I 4 mA 16 mA

0605-015

where

ref

-----------------------------

⋅+=

max

min

–

min

Q Q Q

= Reference value of the calibrated quantity

ref

= Reference value of the calibrated quantity

min

= Value corresponding to 20 mA

max

Example 1: Relative humidity scaling 0 ... 100 %RH, reference 11.3 %RH:

11.3 %RH 0 %RH–

I 4 mA 16 mA

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-------------------------------------------------

⋅+ 5.808 mA==

100 %RH 0 %RH–

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Chapter 6 __________________________________________________ Calibration and Adjustment

0605-016

Example 2:

Temperature scaling -40 ... +120 °C, reference 22.3 °C:

22.3° C40° C–

I 4 mA 16 mA

0605-017

--------------------------------------

⋅+ 10.230 mA==

120° C40° C–

Relative Humidity Adjustment

Automatic Two-Point Adjustment (Only with HMT360 with Display)

The automatic adjustment procedure is a user friendly way to adjust the HMT360 with salt solutions; you do not have to feed the reference values to the HMT360. The transmitter displays the accurate value based on the measured temperature and the Greenspan table stored into the transmitter memory. The display chart of the adjustment procedure is presented in Figure 26 on page 66.

NOTE

- Set the internal DIP switch Calibration Enabled/Disabled to position ON and select RH calibration by using switches 3 and 4 (see section DIP Switch Functions on page 45).

- Remove the filter and insert the probe into a measurement hole of the LiCl salt chamber in the humidity calibrator. Acknowledge by pressing button E. Alternatively select the 0.1 (humidity in nitrogen) with buttons Up and Dn. Acknowledge with button E.

- The transmitter remains to wait for the process stabilization (10 ... 15 min) and then stores the correction.

- Insert the probe into a measurement hole of the NaCl salt chamber in the humidity calibrator. Acknowledge by pressing button E. Alternatively you can select K2SO4 value with buttons Up and Dn.

- The transmitter remains to wait for the stabilization and then stores the correction. The text "Cal Pass" is displayed after the adjustment is performed.

Remember to restore the DIP switch settings.

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0604-061

Figure 26 Display Chart of the Automatic Adjustment

Procedure

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Chapter 6 __________________________________________________ Calibration and Adjustment

Manual Adjustment

Low End Adjustment

NOTE

If you use serial commands, please refer to section Adjustment

Commands on page 53.

1. Remove the filter and insert the probe into a measurement hole of the dry end reference chamber (for example LiCl: 11 %RH) in the humidity calibrator.

2. Remove the filter and insert the probe into a measurement hole of the dry end reference chamber (for example LiCl: 11 %RH) in the humidity calibrator.

3. Set the internal DIP switch Calibration Enabled/Disabled to position ON and select RH calibration by using switches 3 and 4 (see section DIP Switch Functions on page 45).

4. Press button C (HMT360 without display: press button E) to ignore the automatic adjustment procedure. The humidity reading measured by the transmitter appears on the display and on the lower left corner you can see the text "Set Lo". If the transmitter has no display, the LED indicator is blinking.

5. According to the calibrator used, wait at least 10 ... 15 minutes for the sensor to stabilize; use a multimeter or the transmitter display to monitor the stabilization.

6. Press buttons Up and Dn to adjust the display reading or multimeter reading to correspond the reference value (when using a multimeter calculate the current value corresponding to the reference humidity by using the equations presented in Calculating

Correspondence of Current Values and Output Quantities on page

64). Press button E to conclude the low end adjustment.

7. If the low end adjustment is sufficient, press button E again to conclude the calibration and restore the DIP switch settings; set the calibration DIP switch to position disabled (down). To continue with the high end adjustment follow the instructions in next section.

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High End Adjustment (Two-Point Adjustment)

1. After having made the low end adjustment, insert the probe into a measurement hole of the NaCl (75 %RH) salt chamber in the humidity calibrator. Please, note that the difference between the two humidity references must be at least 30 %RH.

NOTE

If you use serial commands, please refer to section Adjustment

Commands on page 53.

2. The readings measured by the transmitter appear on the display, as well as the text "Set Hi" on the lower left hand corner. If the transmitter has no display, the LED indicator lights up.

3. Wait at least 10 ... 15 minutes for the sensor to stabilize; use a multimeter or the transmitter display to monitor the stabilization.

4. Press buttons Up and Dn to adjust the display or multimeter reading (when using a multimeter calculate the current value corresponding to the reference humidity by using the equations presented in Calculating Correspondence of Current Values and

Output Quantities on page 64) and conclude the adjustment with

button E.

5. Restore the DIP switch settings. Set the calibration DIP switch to position disabled (down).

One-Point Temperature Adjustment

NOTE

68 __________________________________________________________________ M010056EN-G

Always use a high quality standard for adjusting the temperature.

If you use serial commands, please refer to section Adjustment

Commands on page 53.

1. Set the internal DIP switch Calibration Enabled/Disabled to position ON and select T calibration by using switches 3 and 4 (see section DIP Switch Functions on page 45).

2. The temperature value measured by the transmitter appears on the display as well as the text "Set Lo" on the lower left corner. If the transmitter has no display, the LED indicator starts to blink.

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Chapter 6 __________________________________________________ Calibration and Adjustment

3. Let the sensor stabilize; use a multimeter or the transmitter display to monitor the stabilization.

4. Press buttons Up and Dn to adjust the display or multimeter reading to correspond to the reference value (when using a multimeter calculate the current value corresponding to the reference humidity by using the equations presented in Calculating

Correspondence of Current Values and Output Quantities on page

64). Conclude the one-point adjustment by pressing button E

twice.

ACAL Analog Output Calibration

Syntax: ACAL<cr> Connect HMT360 to a multimeter. Issue the ACAL command:

1. Disconnect the serial cable from the transmitter while reading the multimeter value for the Ch 1 (I1).

2. Reconnect the serial cable. Type the multimeter reading and press Enter.

3. Type the higher current multimeter reading and press Enter.

Example:

>acal<cr> Ch1 I1 ( mA ) ? 4.846<cr> Ch1 I2 ( mA ) ? 19.987<cr> >

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Chapter 7 ______________________________________________________________ Maintenance

CHAPTER 7

MAINTENANCE

This chapter provides information that is needed in basic maintenance of the product.

Periodical Checking and Cleaning

Transmitter Housing and Probe

WARNING

Avoid static discharge. Always use a wet cloth for wiping the display.

The electronics unit of the transmitter, as well as the probe, can be removed and replaced in the field. See section Removing the

Electronics Unit on page 62 for detailed information.

All other maintenance must be performed by qualified Vaisala personnel. If a transmitter is damaged, contact your nearest Vaisala Service Center (see contact information Vaisala Service Centers on

page 75).

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Chapter 8 _____________________________________________________ ______ Troubleshooting

CHAPTER 8

TROUBLESHOOTING

This chapter describes common problems, their probable causes and remedies, and contact information.

Diagnostics

Operation Errors

The following symptoms indicate an operation error of the HMT360:

- The analog output(s) current drops below 4 mA.

- Display shows the word "ERROR".

- The LED on the cover is lit and no calibration is going on (transmitters without display).

In the case of error:

- Check that the sensor is connected properly.

- Check if there is condensed water in the probe. If yes, let the probe dry.

In case of constant error, contact your nearest Vaisala Service Center. See section Vaisala Service Centers on page 75 for contact information.

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Analog Output Test

Analog outputs can be tested with dip switch 1, see DIP Switch

Functions on page 45 for details.

Technical Support

For technical questions, contact the Vaisala technical support: E-mail helpdesk@vaisala.com Fax +358 9 8949 2790

Return Instructions

If the product needs repair, please follow the instructions below to speed up the process and to avoid extra costs to you.

1. Read the section Warranty on page 14.

2. Contact a Vaisala Service Center or a local Vaisala representative. The latest contact information and instructions are available from www.vaisala.com. Addresses of the Service Centers are provided in section Vaisala Service Centers on page 75.

Please have the following information on hand:

- serial number of the unit

- date and place of purchase or last calibration

- description of the fault

- circumstances in which the fault occurs/occurred

- name and contact information of a technically competent

person who can provide further information on the problem

3. Pack the faulty product in a strong box of adequate size, with proper cushioning material to avoid damage.

4. Include the information specified in step 2 in the box with the faulty product. Also include a detailed return address.

5. Ship the box to the address specified by your Vaisala contact.

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Vaisala Service Centers

Vaisala Service Centers perform calibrations and adjustments as well as repair and spare part services. See contact information below.

Vaisala Service Centers also offer accredited calibrations, maintenance contracts, and a calibration reminder program. Do not hesitate to contact them to get further information.

NORTH AMERICAN SERVICE CENTER

Vaisala Inc., 10-D Gill Street, Woburn, MA 01801-1068, USA.

Phone: +1 781 933 4500, Fax: +1 781 933 8029 E-mail: us-customersupport@vaisala.com

EUROPEAN SERVICE CENTER

Vaisala Instruments Service, Vanha Nurmijärventie 21 FIN-01670 Vantaa, FINLAND.

Phone: +358 9 8949 2658, Fax: +358 9 8949 2295 E-mail: instruments.service@vaisala.com

TOKYO SERVICE CENTER

Vaisala KK, 42 Kagurazaka 6-Chome, Shinjuku-Ku, Tokyo 162-0825, JAPAN.

Phone: +81 3 3266 9617, Fax: +81 3 3266 9655 E-mail: aftersales.asia@vaisala.com

BEIJING SERVICE CENTER

Vaisala China Ltd., Floor 2 EAS Building, No. 21 Xiao Yun Road, Dongsanhuan Beilu,

Chaoyang District, Beijing, P.R. CHINA 100027. Phone: +86 10 8526 1199, Fax: +86 10 8526 1155

E-mail: china.service@vaisala.com

www.vaisala.com

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Chapter 9 ____________________________________________________________ Technical Data

CHAPTER 9

TECHNICAL DATA

This chapter provides technical data of the product.

Performance

Relative Humidity

Table 7 Relative Humidity Specifications

Property Description / Value

Measurement range 0 ... 100 %RH Accuracy (including non-linearity, hysteresis and repeatability)

with HUMICAP and HUMICAP

at +15 ... 25 °C at -20 ... +40 °C

at -40 ... +180 °C with HUMICAP

at -10 ... +40 °C at -40 ... +180 °C

Factory calibration uncertainty (+20 °C)

180

180R

180L2

for typical applications for typical applications ± 1 %RH (0 ... 90 %RH) ± 1.7%RH (90...100%RH) ±(1.0 + 0.008 × reading) %RH ±(1.5 + 0.015 × reading) %RH

for applications with demanding chemical environment ±(1.0 + 0.01 × reading) %RH ±(1.5 + 0.02 × reading) %RH

± 0.6 %RH (0 ... 40 %RH) ± 1.0%RH (40...97%RH) (Defined as ±2 standard deviation limits. Small variations possible, see also calibration certificate.)

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Table 7 Relative Humidity Specifications

Property Description / Value

Response time (90 %) for

HUMICAP 180L2 at +20 °C in still air

Response time (90 %) for HUMICAP

in 0.1 m/s air flow

180 and HUMICAP

180R at +20 °C

8 seconds with grid filter 20 seconds with grid + steel netting 40 seconds with sintered filter

17 seconds with grid filter 50 seconds with grid + steel netting 60 seconds with sintered filter

Temperature (+ Operating Pressure Ranges)

Table 8 Temperature Specifications

Property Description / Value

HMP361 -40...+60°C HMP363 80°C -40...+80°C HMP363 120 °C -40 ... +120 °C HMP364 -70 ... +180 °C, 0 ... 10 MPa

(0 ... 100 bar) HMP365 -70 ... +180 °C HMP367 -70 ... +180 °C HMP368 -70...+180°C, 0...4MPa

(0 ... 40 bar) Accuracy at +20 °C ± 0.2 °C Accuracy over temperature range See graph below Sensor Pt 1000 RTD 1/3 Class B

IEC 751

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0507-021

Figure 27 Accuracy over Temperature Range

Water Activity in Jet Fuel Applications

Table 9 Water Activity in Jet Fuel Applications

Specifications

Property Description / Value

Measurement range 0 ... 1 a

40 ... +356 °F)

Accuracy when calibrated against high quality, certified humidity standards

± 0.01 (0 ... 0.9) ± 0.02 (0.9 ... 1.0)

salt solutions (ASTM E104-85)

± 0.02 (0 ... 0.9) ± 0.03 (0.9 ... 1.0)

Response time (90 %) at +20 °C in still oil (stainless steel filter)

Humidity sensor Calculated variables available mass concentration of water

Accuracy of the water content better than ± 15 % of the

10 min

Vaisala HUMICAP

relative humidity of saturation saturation temperature

reading

at -40 ... +180 °C (-

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Calculated Variables (Typical Ranges)

With HMP361 Probe

Table 10 HMP361 Calculated Variables Specifications

Property Description / Value

Dewpoint temperature -40 ... +60 °C Mixing ratio 0 ... 160 g/kg d.a. Absolute humidity 0 ... 160 g/m³ Wet bulb temperature 0 ... +60 °C

With HMP363, HMP364, HMP365, HMP367 and HMP368 Probes

Outputs

Table 11 HMP363, HMP364, HMP365, HMP367& HMP368

Probes Calculated Variables Specifications

Property Description / Value

Dewpoint temperature -40 ... +100 °C Mixing ratio 0 ... 500 g/kg d.a. Absolute humidity 0 ... 600 g/m³ Wet bulb temperature 0 ... +100 °C

Table 12 Output Specifications

Property Description / Value

Two analog outputs (one standard, one optional)

Typical accuracy of analog outputs at +20 °C

Typical temperature dependence of analog outputs

RS232C serial output for service use only

in safe area

two wire 4 ... 20 mA

± 0.05 %/°C full scale

± 0.005 %/°C full scale

connector type RJ45

WARNING

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Output connections are made via safety barriers.

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Chapter 9 ____________________________________________________________ Technical Data

Classification with Current Outputs

EU (94/9/EC, ATEX100a) II 1 G EEx ia IIC T4 PTB 00 ATEX 2112 X Safety factors: Ui= 28 V, Ii= 100 mA, Pi= 0.7 W

Ci= 1 nF, Li=0H

Environmental specifications: T

Dust classification (with protection cover 214101):

= -20 ... +60 °C

amb

= 0.8 ... 1.1 bar

amb

II 1 D (IP65 T = 70 °C) VTT 04 ATEX 023X

U.S.A. (FM) Classes I, II, III

Division 1: Groups A - G Division 2: Groups A - D, F and G FM Project ID: 3010615

Safety factors: V

= 28 VDC, I

max

= 100 mA

max

Ci= 1 nF, Li= 0, Pi= 0.7 W T

=60°C, T5

amb

Canada (CSA) Class 1, Divisions 1 and 2, Groups A, B, C, D

Class II, Divisions 1 and 2, Groups G and Coal Dust Class III CSA File No: 213862 0 000; CSA report 1300863 T

= 60 °C, T4

amb

Japan (TIIS) Ex ia IIC T4

Code number: TC17897

Safety factors: U

= 28 VDC, Ii= 100 mA, Ci=1nF

= 0, Pi= 0.7 W, T

amb

=60°C

China (PCEC) Ex ia II CT5

Certificate No. CE04052 Standard GB3686.1-2000 and GB3836.4-2000

Russia (STV) Ex ia IIC T4

Certificate No. ROSS FI.GB04.V00634

Safety factors: Ui = 28 V, Ii = 100 mA, Pi = 700 mW

Ci = 1 nF, Li = 0 H, T

= -20 °C...+60 °C

amb

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General

Table 13 General Specifications

Property Description / Value

Operating voltage with serial port (service mode)

Connections screw terminals,

Cable bushings M20×1.5 (7.5 ... 12 mm)

Conduit fitting M20×1.5 / NPT 1/2" Operating temperature range for electronics

with display

12 ... 28 V

15 ... 28 V

0.33 ... 2.0 mm

(AWG 14-22)

M20×1.5 (10.5 ... 15 mm)

-40 ... +60 °C

-20 ... +60 °C

wires

NOTE

Storage temperature range Housing material G-AlSi 10 Mg (DIN 1725) Housing classification IP 66 (NEMA 4X) Housing dimensions 164 × 115 × 62 mm Housing weight 950 g Fully electromagnetically compatible

according to standards

-40 ... +70 °C

EN 61326-1: Electrical

equipment for measurement,

control and laboratory use -

EMC requirements; Industrial

environment

IEC 1000-4-5 complies only when using external EXi approved surge arrester on safe area.

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Chapter 9 ____________________________________________________________ Technical Data

Options and Accessories

Table 14 Options and Accessories

Item Description / Order Code

MODULES Analog Output Module HM360AOUTSP

SENSORS HUMICAP HUMICAP HUMICAP

FILTERS Sintered Stainless Steel Filter HM47280SP Stainless Steel Filter HM47453SP Stainless Steel Filter with Membrane 214848SP PPS Plastic Grid with Stainless Steel

Netting PPS Plastic Grid Filter DRW010276SP

180

180R

180L2

HUMICAP180 HUMICAP180R HUMICAP180L2

DRW010281SP

TRANSMITTER MOUNTING ACCESSORIES Wall Mounting Kit HM37108SP Rain shield 215109 Protection cover (for use in the presence of

combustible dust, ATEX)

PROBE MOUNTING ACCESSORIES HMT363/HMP363 Duct Installation Kit 210697 Cable Gland M20×1.5 with Split Seal HMP247CG Swagelok for 12mm Probe 3/8" ISO Thread SWG12ISO38 Swagelok for 12mm Probe 1/2" NPT

Thread

HMT364/HMP364 Fitting Body M22×1.5 17223SP Fitting Body NPT1/2 17225SP

HMT365/HMP365 Mounting Flange 210696 Cable Gland M20×1.5 with Split Seal HMP247CG

214101

SWG12NPT12

HMT367/HMP367 Duct Installation Kit 210697

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User's Guide ______________________________________________________________________

Table 14 Options and Accessories

Item Description / Order Code

Cable Gland M20x1.5 with Split Seal HMP247CG Swagelok for 12mm Probe 3/8" ISO Thread SWG12ISO38 Swagelok for 12mm Probe 1/2" NPT

Thread

HMT368/HMP368 Fitting Body ISO1/2 Solid Structure DRW212076SP Fitting Body NPT1/2 Solid Structure NPTFITBODASP Fitting Body Set ISO 1/2 ISOFITBODASP Fitting Body Set (ISO 1/2 + NPT 1/2) THREADSETASP Leaking Screw with Allen Key 216027 Thread Adapter ISO1/2 to NPT1/2 210662SP Sampling Cell with Female Connectors DMT242SC Sampling Cell with Swagelok Connectors DMT242SC2 Ball Valve ISO1/2 with Welding Joint BALLVALVE-1 Installation Flange ISO1/2 DM240FA Manual Press HM36854SP

SWG12NPT12

CONNECTION CABLES Serial Interface Cable 25905ZZ

CABLE BUSHINGS Cable Gland M20×1.5 for 7.5...12mm Cable 216587SP Cable Gland M20×1.5 for 10...15mm Cable 216588SP Conduit Fitting M20×1.5 for NPT1/2

Conduit Dummy Plug M20×1.5 for transmitter body 214672SP

OTHER Calibration Adapter for HMK15 211302SP Galvanic isolator 212483 Barrier 210664

Accuracy of Calculated Variables

Accuracy of the calculated variables depend on the calibration accuracy of the humidity and temperature sensors; here the accuracy are given for ±2 %RH and ±0.2 °C.

214780SP

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Chapter 9 ____________________________________________________________ Technical Data

Accuracy of Dewpoint Temperature °C

Relative humidity

Temp.102030405060708090100

-40 1.86 1.03 0.76 0.63 0.55 0.5 0.46 0.43 — —

-20 2.18 1.19 0.88 0.72 0.62 0.56 0.51 0.48 — — 0 2.51 1.37 1 0.81 0.7 0.63 0.57 0.53 0.5 0.48 20 2.87 1.56 1.13 0.92 0.79 0.7 0.64 0.59 0.55 0.53 40 3.24 1.76 1.27 1.03 0.88 0.78 0.71 0.65 0.61 0.58 60 3.6 1.96 1.42 1.14 0.97 0.86 0.78 0.72 0.67 0.64 80 4.01 2.18 1.58 1.27 1.08 0.95 0.86 0.79 0.74 0.7 100 4.42 2.41 1.74 1.4 1.19 1.05 0.95 0.87 0.81 0.76 120 4.86 2.66 1.92 1.54 1.31 1.16 1.04 0.96 0.89 0.84 140 5.31 2.91 2.1 1.69 1.44 1.26 1.14 1.05 0.97 0.91 160 5.8 3.18 2.3 1.85 1.57 1.38 1.24 1.14 1.06 0.99

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Accuracy of Mixing Ratio g/kg

(Ambient pressure 1013 mbar)

Relative humidity

Temp.102030405060708090100

-40 0.003 0.003 0.003 0.003 0.003 0.004 0.004 0.004 — —

-20 0.017 0.018 0.019 0.021 0.022 0.023 0.025 0.026 — — 0 0.08 0.09 0.09 0.1 0.1 0.11 0.11 0.12 0.13 0.13 20 0.31 0.33 0.35 0.37 0.39 0.41 0.43 0.45 0.47 0.49 40 0.97 1.03 1.1 1.17 1.24 1.31 1.38 1.46 1.54 1.62 60 2.68 2.91 3.16 3.43 3.72 4.04 4.38 4.75 5.15 5.58 80 6.73 7.73 8.92 10.34 12.05 14.14 16.71 19.92 24.01 29.29 100 16.26 21.34 28.89 40.75 60.86 98.85 183.66 438.56 — — 120 40.83 74.66 172.36 — — — — — — —

Accuracy of Wet Bulb Temperature °C

Relative humidity

Temp.102030405060708090100

-40 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 — —

-20 0.21 0.21 0.22 0.22 0.22 0.22 0.23 0.23 — — 0 0.27 0.28 0.28 0.29 0.29 0.29 0.3 0.3 0.31 0.31 20 0.45 0.45 0.45 0.44 0.44 0.44 0.43 0.43 0.42 0.42 40 0.84 0.77 0.72 0.67 0.64 0.61 0.58 0.56 0.54 0.52 60 1.45 1.2 1.03 0.91 0.83 0.76 0.71 0.67 0.63 0.6 80 2.23 1.64 1.32 1.13 0.99 0.89 0.82 0.76 0.72 0.68 100 3.06 2.04 1.58 1.31 1.14 1.01 0.92 0.85 0.8 0.75 120 3.85 2.4 1.81 1.48 1.28 1.13 1.03 0.95 0.88 0.83 140 4.57 2.73 2.03 1.65 1.41 1.25 1.13 1.04 0.97 0.91 160 5.25 3.06 2.25 1.82 1.55 1.37 1.24 1.13 1.05 0.99

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Chapter 9 ____________________________________________________________ Technical Data

Accuracy of Absolute Humidity g/m

Relative humidity

Temp.102030405060708090100

-40 0.004 0.004 0.005 0.005 0.005 0.006 0.006 0.006 — —

-20 0.023 0.025 0.027 0.029 0.031 0.032 0.034 0.036 — — 0 0.1 0.11 0.12 0.13 0.13 0.14 0.15 0.15 0.16 0.17 20 0.37 0.39 0.41 0.43 0.45 0.47 0.49 0.51 0.53 0.55 40 1.08 1.13 1.18 1.24 1.29 1.34 1.39 1.44 1.49 1.54 60 2.73 2.84 2.95 3.07 3.18 3.29 3.4 3.52 3.63 3.74 80 6.08 6.3 6.51 6.73 6.95 7.17 7.39 7.61 7.83 8.05 100 12.2 12.6 13 13.4 13.8 14.2 14.6 15 15.3 15.7 120 22.6 23.3 23.9 24.6 25.2 25.8 26.5 27.1 27.8 28.4 140 39.1 40 41 42 43 44 45 45.9 46.9 47.9 160 63.5 64.9 66.4 67.8 69.2 70.7 72.1 73.5 74.9 76.4

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Appendix A ______________________________________________________________ Dimensions

APPENDIX A

DIMENSIONS

This Appendix contains parts drawings of the transmitter housing, probes and some transmitter mounting accessories with metric and nonmetric dimensions specified.

HMP361

0603-042

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User's Guide ______________________________________________________________________

HMP363

0603-015

HMP364

HMP365

0603-016

0603-017

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Appendix A ______________________________________________________________ Dimensions

HMP367

0603-018

HMP368

0603-019

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User's Guide ______________________________________________________________________

Mounting Plate

Rain Shield

0603-041

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Appendix A ______________________________________________________________ Dimensions

Protection Cover

0505-304

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User's Guide ______________________________________________________________________

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Appendix B ______________________________________ Wiring for Intrinsically Safe Operation, FM

APPENDIX B

WIRING FOR INTRINSICALLY SAFE OPERATION, FM

This appendix contains the wiring diagram for intrinsically safe operation approved by Factory Mutual (FM).

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User's Guide ______________________________________________________________________

QTY

REV

DESCRIPTION / INFO / ECO No.

DESIGN

ACCEPTED / ApprovedCHECKED / Reviewed

HMT360 connection board

-Ch1+

-Ch2+

General tolerance

Material Weight

Finish

FIRST ANGLE PROJECTION

DIMENSIONS ARE IN MILLIMETERS, UNLESS OTHERWISE SPECIFIED

Design

Supplier code

Creator

Review

Approved

Archive ID

DOCUMEN T CRE ATION D ATA

YYYY-MM-DD INITIAL S

Size

Scale

Title

Code

Rev

Sheet of

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Appendix C_____________________________________ Wiring for Intrinsically Safe Operation, CSA

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).

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0505-306

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Vaisala HUMICAP HMT361, HUMICAP HMT362, HUMICAP HMT363, HUMICAP HMT364, HUMICAP HMT365 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

About This Manual

Contents of This Manual

Version Information

Related Manuals

General Safety Considerations

Feedback

Product Related Safety Precautions

ESD Protection

Recycling

Regulatory Compliances

Trademarks

License Agreement

Warranty

Introduction to Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMT360

Output Quantities

Probe Options

General Installation Instructions

Mounting the Probe Cable in Gas Group IIC Spaces

Selecting Location

General Instructions for Probes with Cable

Checking the Temperature Reading

Mounting the Transmitter Housing

Probe Mounting

HMP363 for Confined Spaces

HMP363/365/367 Duct Installation Kit

HMP364 for High-Pressure Applications

HMP365 for High Temperatures

HMP367 for High Humidities

HMP368 for Pressurized Pipelines or Moisture in Liquids

Tightening the Clasp Nut

Installing the HMP368 Probe Through a Ball Valve Assembly

Electrical Connections

Installation in Hazardous Locations

US and Canadian Requirements

European Requirements

CATEGORY 1 (Zone 0)

CATEGORY 2 or 3 (Zone 1 or 2)

Maximum Cable Resistance Calculation for the Barrier (Vaisala Order Code: 210664)

HMT360 Connected to a Galvanic Isolator

HMT360 Connected to a Zener Barrier

Examples of Connections

Grounding

Local Interface

Power ON/OFF

HMT360 with Display

HMT360 without Display

DIP Switch Functions

Display/Keypad Commands

Setting the Pressure for Calculations

Selecting Output Quantities

Upper Half of Display

Lower Half of Display

Selecting Analog Outputs

Scaling Analog Outputs

Serial Interface

Serial Communication Settings

Setting the Analog Outputs

ASEL Selecting Analog Outputs

S Scaling Analog Outputs

Adjustment Commands

CRH Relative Humidity Adjustment

CT Temperature Adjustment

Output Commands

ITEST Testing Analog Outputs

SEND Outputting Measurement Values

R Activating Continuous Output

S Stopping Continuous Output

INTV Setting Output Interval

PRES Setting Ambient Pressure for Calculations

FILT Output Filtering

Resetting the Transmitter

RESET Transmitter Reset

Pressure Regulator Recommended

Calibration Interval

Factory Calibration and Adjustment