Vaisala HUMICAP HMT360 SERIES User manual

USER'S GUIDE
Vaisala HUMICAP® Humidity and
Temperature Transmitter Series
HMT360
M010056EN-G

PUBLISHED BY
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Table of Contents
CHAPTER 1
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Contents of This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Version Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
General Safety Considerations . . . . . . . . . . . . . . . . . . . . .11
Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Product Related Safety Precautions . . . . . . . . . . . . . . . . . .12
ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Regulatory Compliances . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
License Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
CHAPTER 2
PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Introduction to Vaisala HUMICAP® Humidity and
Temperature Transmitter Series HMT360 . . . . . . . . . . . . . .15
Output Quantities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Probe Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
CHAPTER 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
General Installation Instructions . . . . . . . . . . . . . . . . . . . . .19
Mounting the Probe Cable in Gas Group IIC Spaces . . . .19
Selecting Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
General Instructions for Probes with Cable . . . . . . . . . . . .20
Checking the Temperature Reading . . . . . . . . . . . . . . . . .22
Mounting the Transmitter Housing . . . . . . . . . . . . . . . . . . .22
Probe Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
HMP363 for Confined Spaces . . . . . . . . . . . . . . . . . . . . . .25
HMP363/365/367 Duct Installation Kit. . . . . . . . . . . . . 26
HMP364 for High-Pressure Applications . . . . . . . . . . . . . .26
HMP365 for High Temperatures . . . . . . . . . . . . . . . . . . . .29
HMP367 for High Humidities . . . . . . . . . . . . . . . . . . . . . . .29
HMP368 for Pressurized Pipelines or Moisture in Liquids .30
Tightening the Clasp Nut . . . . . . . . . . . . . . . . . . . . . . . 31
Installing the HMP368 Probe Through a Ball Valve
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

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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 HMT360 . . . . . . . . . . . . . . . .18
Figure 3 Horizontal Mounting of Probe. . . . . . . . . . . . . . . . . . . . . . . . . .20
Figure 4 Vertical Mounting of Probe. . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Figure 5 Measurement Error at 100 %RH . . . . . . . . . . . . . . . . . . . . . . .22
Figure 6 Transmitter Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Figure 7 Parts of the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Figure 8 Installation of HMP363 Probe in Duct with Flange and
Supporting Bar. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Figure 9 HMP364 Probe Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Figure 10 Marking Nut and Fitting Screw. . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 11 Cleaning the Tightening Cone . . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 12 Mounting HMP365 Probe in Duct or Channel . . . . . . . . . . . . .29
Figure 13 HMP368 Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Figure 14 Sealing of Fitting Body into Process . . . . . . . . . . . . . . . . . . . .31
Figure 15 Tightening the Clasp Nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Figure 16 Installing the HMP368 Probe Through a Ball Valve Assembly 33
Figure 17 HMT360 Connected to Galvanic Isolator. . . . . . . . . . . . . . . . .39
Figure 18 HMT360 Connected to a Zener Barrier . . . . . . . . . . . . . . . . . .40
Figure 19 STAHL 9160/13-11-11 (Galvanic Isolator). . . . . . . . . . . . . . . .41
Figure 20 STAHL 9001/51-280-091-141 (Zener Barrier) . . . . . . . . . . . . .41
Figure 21 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Figure 22 Local Display/Keypad Interface . . . . . . . . . . . . . . . . . . . . . . . .44
Figure 23 DIP Switch Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Figure 24 Detaching the Electronics Unit with Probe for Calibration and
Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Figure 25 Connecting Power Supply and Multimeter for Calibration . . . .63
Figure 26 Display Chart of the Automatic Adjustment Procedure . . . . . .66
Figure 27 Accuracy over Temperature Range. . . . . . . . . . . . . . . . . . . . .79

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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 HMT360 . . . . . . . . . . . . . . . . . .16
Table 4 HMP368 Probe Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Table 5 Serial Communications Settings . . . . . . . . . . . . . . . . . . . . . . . . .51
Table 6 Pressure Conversion Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Table 7 Relative Humidity Specifications . . . . . . . . . . . . . . . . . . . . . . . . .77
Table 8 Temperature Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Table 9 Water Activity in Jet Fuel Applications Specifications . . . . . . . . .79
Table 10 HMP361 Calculated Variables Specifications . . . . . . . . . . . . . . .80
Table 11 HMP363, HMP364, HMP365, HMP367& HMP368 Probes
Calculated Variables Specifications. . . . . . . . . . . . . . . . . . . . . . .80
Table 12 Output Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Table 13 General Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Table 14 Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

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