Vaisala Spectracap OMT364 User manual

USER'S GUIDE
Vaisala SPECTRACAP®
Oxygen Transmitter OMT364
M210862EN-A

PUBLISHED BY
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© Vaisala 2009
No part of this manual may be reproduced in any form or by any means,
electronicormechanical(includingphotocopying),normayitscontents
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The contents are subject to change without prior notice.
Please observe that this manual does not create any legally binding
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binding commitments and agreements are included exclusively in the
applicable supply contract or Conditions of Sale.
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P.O. Box 26 Fax: [phone]
FI-00421 Helsinki
Finland

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VAISALA________________________________________________________________________ 1
Table of Contents
CHAPTER 1
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
General Safety Considerations . . . . . . . . . . . . . . . . . . . . .11
Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Product Related Safety Precautions . . . . . . . . . . . . . . . . . .12
ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Regulatory Compliances . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Patent Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
License Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
CHAPTER 2
PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Introduction to OMT364 . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
OMT364 in Hazardous Locations . . . . . . . . . . . . . . . . . . . . .17
OMT364 for In-Line and Sampling Cell Mounting . . . . . . .18
OMT364 for Ambient Gas Measurement . . . . . . . . . . . . . . .20
CHAPTER 3
FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Measurement Principle and Sensor Technology . . . . . . . .21
Construction of the OMT364 Probe . . . . . . . . . . . . . . . . . . .23
Eye Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
CHAPTER 4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Selecting the Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Transmitter Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Chemical Tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Temperature Conditions of Installation Location . . . . . . . .29
Powerful Light Sources Near the Oxygen Measurement
Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Maximum Allowed Installation Angle . . . . . . . . . . . . . . . . .30
Mounting Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Process Conditions in Regard to Mounting Options . . . . .31
Flange Mounted for In-Line Process Gas Measurement . .33

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Suitable Process Flanges . . . . . . . . . . . . . . . . . . . . . . 33
Filter Recommendation . . . . . . . . . . . . . . . . . . . . . . . . 33
Mounting with a Flange Adapter . . . . . . . . . . . . . . . . . 34
Mounting with a Sampling Cell . . . . . . . . . . . . . . . . . . . . . .35
Filter Recommendation . . . . . . . . . . . . . . . . . . . . . . . . 36
Mounting with a Wall Mounting Bracket. . . . . . . . . . . . 37
Tubing Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Installation Instructions for Swagelok Tube Fittings 38
Sampling Cell Instructions . . . . . . . . . . . . . . . . . . . . . . 39
Mounting the OMT364 for Ambient Gas Measurement . . .41
Mounting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Signal and Power Supply Wiring . . . . . . . . . . . . . . . . . . . .43
CHAPTER 5
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Device Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Keypad, Display and LEDs . . . . . . . . . . . . . . . . . . . . . . . .47
Service Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Installing the Driver for the USB Cable . . . . . . . . . . . . 48
Customer Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Analog Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Local Interface (Keypad and Display) . . . . . . . . . . . . . . . . .50
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Display Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Error Condition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Service Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Customer Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
General Instructions for Using Functions . . . . . . . . . . . . . .53
Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Serial Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
List of Serial Commands . . . . . . . . . . . . . . . . . . . . . . . . . .59
Outputting Measurement Results . . . . . . . . . . . . . . . . . . . .60
Start Continuous Output Command (R) . . . . . . . . . . . . . . .60
Stop Continuous Output Command (S) . . . . . . . . . . . . . . .61
Show/Set Continuous Output Interval Command (INTV) . .61
Send Measurement Results Command (SEND) . . . . . . . .62
Show/Set Serial Communications Mode Command
(SMODE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Show/Set Serial Communications Mode for Line 2
Command (SMODE2) . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Show/Set Serial Communications Settings Command
(SERI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

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Show/Set Serial Communication Settings for Line 2
Command (SERI2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Show Serial Line 1 Status Command (SCI1) . . . . . . . . . . .65
Show Serial Line 2 Status Command (SCI2) . . . . . . . . . . .65
Show Measurement Status Command (MEA) . . . . . . . . . .66
Oxygen Statistics Display Function . . . . . . . . . . . . . . . . . .66
Temperature Statistics Display Function . . . . . . . . . . . . . .67
Formatting Measurement Results . . . . . . . . . . . . . . . . . . . .67
Set Output Format Command (FORM) . . . . . . . . . . . . . . .67
Show/Set Date Command (DATE) . . . . . . . . . . . . . . . . . .69
Show/Set Time Command (TIME) . . . . . . . . . . . . . . . . . . .70
Networking Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
Show/Set Device Address Command (ADDR) . . . . . . . . .70
Open Communications Line Command (OPEN) . . . . . . . .71
Close Serial Line in Poll Mode Command (CLOSE) . . . . .71
Set Echoing Mode Command (ECHO) . . . . . . . . . . . . . . .72
Accessing Service Level Commands . . . . . . . . . . . . . . . . .73
Issue Password Command (PASS) . . . . . . . . . . . . . . . . . .73
Issue Password Function (Pas) . . . . . . . . . . . . . . . . . . . . .73
Analog Output Calibration . . . . . . . . . . . . . . . . . . . . . . . . . .74
Calibrate Analog Output Command (ICAL) . . . . . . . . . . . .74
Analog Output Scaling and Settings . . . . . . . . . . . . . . . . . .75
Scale Analog Output Function (Ascl) . . . . . . . . . . . . . . . . .75
Show/Set Output Parameters Command (OUT_PARAMS) 75
Analog Output Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Set Test Current to Analog Output Command (ITEST) . . .76
Test Analog Output Function (Aou) . . . . . . . . . . . . . . . . . .77
Relay Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Show/Set Relay Operating Mode Command
(RELAY_MODE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Show/Set Relay Trigger Points Command (RSEL) . . . . . .78
Test Alarm Relay Function (Ala) . . . . . . . . . . . . . . . . . . . .79
Device Information and Other General Commands . . . . . .79
Show Information about the Device Command (?) . . . . . .79
Show Information about the Device Overriding POLL
Mode Command (??) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Show Measuring Parameters Command (CALCS) . . . . . .81
Show Calibration Information (CINFO) . . . . . . . . . . . . . . .81
Show Display Board Status Command (DB) . . . . . . . . . . .82
List Commands Command (HELP) . . . . . . . . . . . . . . . . . .82
Show Laser Temperature Controller Status Command
(LTC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Show Output Status Command (OUT) . . . . . . . . . . . . . . .83
Show All Modifiable Parameter Values (PARAM) . . . . . . .84
Measure Signal Level Command (SIL) . . . . . . . . . . . . . . .84
Signal Level Display Function (Sil) . . . . . . . . . . . . . . . . . .85
Show Statistical Information Command (STATS) . . . . . . .85
Show Status of Subfunctions Command (STATUS) . . . . .86
Show Product Name and Software Version Command
(VERS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

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Memory Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
Save Parameters Command (SAVE) . . . . . . . . . . . . . . . . .87
Resetting the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . .88
Reset Command (RESET) . . . . . . . . . . . . . . . . . . . . . . . . .88
Reset Function (Off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
CHAPTER 6
SETTING ENVIRONMENTAL PARAMETERS . . . . . . . . . . . . . . . . . . . . . .89
Environmental Parameter Compensations . . . . . . . . . . . . .89
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . .90
Operating Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
Show/Set Pressure for Compensation Command
(PRES). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Set Pressure for Compensation Command (XPRES) . 93
Set (Average) Process Pressure Function (App). . . . . 93
Background Gas Effects . . . . . . . . . . . . . . . . . . . . . . . . . .94
General Information About Background Gas Effects. . 94
Water Content of Background Gas . . . . . . . . . . . . . . . 95
Set Water Content for Compensation Command (H2O) 97
Set (Average) Water Content Function (H2O). . . . . . . 98
CO2 Concentration of Background Gas. . . . . . . . . . . . 98
Set Carbon Dioxide Content for Compensation
Command (CO2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Set (Average) Carbon Dioxide Content Function (CO2) 99
Setting Several/All Environmental Parameters with
Single Command (ENV) . . . . . . . . . . . . . . . . . . . . . . . . . .100
CHAPTER 7
CALIBRATION AND ADJUSTMENT (IN-LINE AND SAMPLING CELL
VERSIONS OF OMT364) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
Hardware Arrangements for Calibration and
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
Gas Feed Setup for Calibration and Adjustment . . . . . . .102
Using Ambient Air . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Using Bottled Gas and Calibration Chamber. . . . . . . 103
Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Calibration or Adjustment in Process. . . . . . . . . . . . . 103
Connections and Systems . . . . . . . . . . . . . . . . . . 104
Preparations for Adjustment . . . . . . . . . . . . . . . . . 104
Connecting the Gas . . . . . . . . . . . . . . . . . . . . . . . 104
Adjusting Gas Flow. . . . . . . . . . . . . . . . . . . . . . . . 105
Information on Calibration Gases. . . . . . . . . . . . . . . . 106
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Using Ambient Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Using Calibration Gases . . . . . . . . . . . . . . . . . . . . . . . . .108
Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . .108
Lock Outputs for Calibration Command (ADJUST) . . . . .108
Calibration Check Function (Cal.C) . . . . . . . . . . . . . . . . .108
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

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Possible Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
One-Point Adjustment Using Serial Line . . . . . . . . . . . . .110
One-Point Adjustment Command (COXY1) and
Procedure Using Serial Line . . . . . . . . . . . . . . . . . . . 110
One-Point Adjustment Using Local Interface . . . . . . . . . .112
One-Point Adjustment Function (CAL1). . . . . . . . . . . 112
One-Point Adjustment Procedure Using Local
Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Two-Point Adjustment Using Serial Line . . . . . . . . . . . . .114
Two-Point Adjustment Command (COXY2) and
Procedure Using Serial Line . . . . . . . . . . . . . . . . . . . 114
Two-Point Adjustment Using Local Interface . . . . . . . . . .117
Two-Point Adjustment Function (CAL2). . . . . . . . . . . 117
Two-Point Adjustment Procedure Using Local
Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Restoring Factory Calibration . . . . . . . . . . . . . . . . . . . . .119
Restore Factory Calibration Command
(FCRESTORE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Restore Factory Calibration Function (Fac). . . . . . . . 119
CHAPTER 8
CALIBRATION AND ADJUSTMENT (AMBIENT GAS MEASUREMENT
VERSION OF OMT364) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121
Hardware Arrangements for Calibration and
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122
Gas Feed Setup for Calibration and Adjustment . . . . . . .123
Using Ambient Air . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Using Bottled Calibration Adjustment Gas. . . . . . . . . 123
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124
Using Ambient Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124
Using Calibration Gas . . . . . . . . . . . . . . . . . . . . . . . . . . .125
Information on Calibration Gases . . . . . . . . . . . . . . . . . .126
Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . .127
Lock Outputs for Calibration Command (ADJUST) . . . . .127
Calibration Check Function (Cal.C) . . . . . . . . . . . . . . . . .127
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128
Possible Adjustments for Ambient Measurement Version 129
One-Point Adjustment Using Serial Line . . . . . . . . . . . . .129
One-Point Adjustment Command (COXY1) and
Procedure Using Serial Line . . . . . . . . . . . . . . . . . . . 129
One-Point Adjustment Using Local Interface . . . . . . . . . .131
One-Point Adjustment Function (CAL1). . . . . . . . . . . 131
One-Point Adjustment Procedure Using Local
Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Restoring Factory Calibration . . . . . . . . . . . . . . . . . . . . .133
Restore Factory Calibration Command
(FCRESTORE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Restore Factory Calibration Function (Fac). . . . . . . . 134

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CHAPTER 9
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135
Field Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135
Cleaning the Optics . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135
Using Solvents to Clean the Optics . . . . . . . . . . . . . . 136
Cleaning the Mirror. . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Cleaning the Lens . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Replacing Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . .138
OMT364 Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138
Filter Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138
Cleaning and Changing the Stainless Steel Mesh
Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Changing the PTFE Filter. . . . . . . . . . . . . . . . . . . . . . 139
CHAPTER 10
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141
Operation Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141
Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141
Error Detection During Operation . . . . . . . . . . . . . . . . . . .142
Error Control and Error Categories . . . . . . . . . . . . . . . . .143
Fatal Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Nonfatal Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Emergency Shutdown State . . . . . . . . . . . . . . . . . . . 145
Show Error Control Status (ERR) . . . . . . . . . . . . . . . . . .145
Show Error Log (ERRL) . . . . . . . . . . . . . . . . . . . . . . . . . .146
Show Detected Errors (ERRS) . . . . . . . . . . . . . . . . . . . . .146
Show Error Table (ERRT) . . . . . . . . . . . . . . . . . . . . . . . .146
Error Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147
Error Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .148
Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149
Return Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149
Vaisala Service Centers . . . . . . . . . . . . . . . . . . . . . . . . . . .149
CHAPTER 11
TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151
Spare Parts and Accessories . . . . . . . . . . . . . . . . . . . . . . .154
APPENDIX A
FLANGE PREPARATION INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . .155
APPENDIX B
HUMIDITY CONVERSION TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157
APPENDIX C
CONTROL DRAWINGS AND CERTIFICATES . . . . . . . . . . . . . . . . . . . .159

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List of Figures
Figure 1 Flange Mounted OMT364 . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Figure 2 OMT364 with Sampling Cell. . . . . . . . . . . . . . . . . . . . . . . . . . .19
Figure 3 OMT364 for Ambient Gas Measurement. . . . . . . . . . . . . . . . .20
Figure 4 O2 Absorption Spectrum Around the 760 nm Near Infrared
Region . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Figure 5 Adjacent O2 Absorption Lines and Laser Emission Peak . . . .22
Figure 6 Schematic of Probe Design . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Figure 7 OMT364 Laser Eye Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Figure 8 OMT364 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 9 Installation Angle Limitations in High Humidities . . . . . . . . . . .31
Figure 10 OMT364 Transmitter with Flange Adapter. . . . . . . . . . . . . . . .33
Figure 11 Dimensions of OMT 364 Flange Mounted . . . . . . . . . . . . . . . .35
Figure 12 OMT364 Transmitter with Sampling Cell. . . . . . . . . . . . . . . . .36
Figure 13 Sample Gas Treatment System. . . . . . . . . . . . . . . . . . . . . . . .37
Figure 14 Swagelok Tube Fitting Instructions . . . . . . . . . . . . . . . . . . . . .39
Figure 15 Detaching the Sampling Cell . . . . . . . . . . . . . . . . . . . . . . . . . .40
Figure 16 Dimensions, OMT364 with Sampling Cell . . . . . . . . . . . . . . . .40
Figure 17 OMT364 for Ambient Gas Measurement with Wall Mounting
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Figure 18 OMT364 Wall Mounted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Figure 19 Dimensions and Drilling Holes, Wall Mounting Bracket (Right)
and Flange Adapter (Left) . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Figure 20 Connections/Local Interface Layout. . . . . . . . . . . . . . . . . . . . .44
Figure 21 OMT364 Display Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Figure 22 Effect of Process Pressure Compensation . . . . . . . . . . . . . . .91
Figure 23 Attaching OMT364 Probe into Calibration Chamber . . . . . . .103
Figure 24 Flow Rate vs. Pressure, Back Pressure Valve Swagelok
SS-CHSM2-KZ-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
Figure 25 Oxygen Readings in Relative Humidity . . . . . . . . . . . . . . . . .107
Figure 26 Attaching OMT364 Probe into Sample Cell . . . . . . . . . . . . . .124
Figure 27 Oxygen Readings in Alternating Humidity . . . . . . . . . . . . . . .125
Figure 28 Calibration Gas O2 Concentration Readings for Ambient
Gas Measurement Version of OMT364 . . . . . . . . . . . . . . . . .126
Figure 29 Location of Mirror in Oxygen Measurement Probe . . . . . . . .136
Figure 30 Location of Lens in Oxygen Measurement Probe . . . . . . . . .137
Figure 31 Stainless Steel Mesh and PTFE Filters . . . . . . . . . . . . . . . . .138
Figure 32 OMT364 Control Drawing, FM. . . . . . . . . . . . . . . . . . . . . . . .160
Figure 33 US Certificate - Page 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161
Figure 34 US Certificate - Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .162
Figure 35 Canadian Certificate - Page 1 . . . . . . . . . . . . . . . . . . . . . . . .163
Figure 36 Canadian Certificate - Page 2 . . . . . . . . . . . . . . . . . . . . . . . .164

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8 _______________________________________________________________________________

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VAISALA________________________________________________________________________ 9
List of Tables
Table 1 Process Conditions and Mounting Options . . . . . . . . . . . . . . . . .32
Table 2 Meaning of the Command Line Elements . . . . . . . . . . . . . . . . . .58
Table 3 OMT364 Default Serial Communication Settings. . . . . . . . . . . . .58
Table 4 List of Serial Commands without Password. . . . . . . . . . . . . . . . .59
Table 5 List of Additional Serial Commands with Password Given. . . . . .59
Table 6 Format String Abbreviations and Quantities . . . . . . . . . . . . . . . .68
Table 7 Format String Modifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Table 8 Conversion Table from T and RH to Absolute Humidity and the
Effect of Humidity on Transmitter Reading . . . . . . . . . . . . . . . . .96
Table 9 Actions When Fatal Error Has Been Detected. . . . . . . . . . . . . . .144
Table 10 Actions When Nonfatal Error Has Been Detected . . . . . . . . . . . .144
Table 11 Actions When Warning Has Been Detected . . . . . . . . . . . . . . . .145
Table 12 Emergency Shutdown Actions. . . . . . . . . . . . . . . . . . . . . . . . . . .145
Table 13 Error Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .148
Table 14 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151
Table 15 Background Gas Effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152
Table 16 Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152
Table 17 Inputs and Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152
Table 18 Approvals and Fulfilled Standards . . . . . . . . . . . . . . . . . . . . . . . .153
Table 19 Dimensions and Mechanics. . . . . . . . . . . . . . . . . . . . . . . . . . . . .153
Table 20 Available Spare Parts and Accessories. . . . . . . . . . . . . . . . . . . .154

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10 ______________________________________________________________________________

Chapter 1 ________________________________________________________ General Information
VAISALA_______________________________________________________________________ 11
CHAPTER 1
GENERAL INFORMATION
About This Manual
This manual provides information for installing, operating, and
maintaining Vaisala SPECTRACAP®Oxygen Transmitter OMT364.
General Safety Considerations
Throughoutthe manual, importantsafety considerationsarehighlighted
as follows:
WARNING Warning alerts you to a serious hazard. If you do not read and follow
instructions very carefully at this point, there is a risk of injury or even
death.
CAUTION Caution warns you of a potential hazard. If you do not read and follow
instructions carefully at this point, the product could be damaged or
important data could be lost.
NOTE Note highlights important information on using the product.

User's Guide ______________________________________________________________________
12 ___________________________________________________________________M210862EN-A
Feedback
Vaisala Customer Documentation Team welcomes your comments and
suggestions on the quality and usefulness of this publication. If you find
errors or have other suggestions for improvement, please indicate the
chapter, section, and page number. You can send comments to us by e-
mail: [email protected].
Product Related Safety Precautions
The Vaisala SPECTRACAP®Oxygen Transmitter OMT364 delivered
to you has been tested for safety and approved as shipped from the
factory. The wetted components of the transmitter are oxygen
compatible, and have been cleaned at the factory to ensure that they can
be safely placed in 100% oxygen. Only oxygen compatible lubricant
(Krytox 240 AC) has been used in the assembly.
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.
CAUTION OMT364 is a Class 1 laser product.
Normal handling and operation of the device is eye-safe, because laser
radiation is collimated and maintained inside the probe, as is
schematically shown in Figure 7 on page 24. No laser radiation is
emitted outside the probe. Avoid placing reflective surfaces (tools,
etc.) directly into the probe when the transmitter is in operation, since
this might cause reflection of laser radiation outside the probe.

Chapter 1 ________________________________________________________ General Information
VAISALA_______________________________________________________________________ 13
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.
- 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.

User's Guide ______________________________________________________________________
14 ___________________________________________________________________M210862EN-A
Regulatory Compliances
OMT364 Oxygen Transmitter is classified as Class 1 laser device in
accordance with IEC 60825-1. CDRH accession number: 07R0485-
000.
OMT364 Oxygen Transmitter is approved for Class I, Division 2,
Groups A, B, C and D. Sensor for Class I, Division 1 and 2, Groups A,
B, C and D hazardous indoor and outdoor locations with an enclosure
rating IP66. Temperature class T4.
Patent Notice
The OMT364 Oxygen Transmitter is protected by the following patents
and their corresponding national rights:
Finnish patent 117808, U.S. patent 7405827.
Trademarks
Vaisala SPECTRACAP®is a registered trademark of Vaisala Oyj.
Kalrez®and Krytox®are registered trademarks of DuPont.
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.

Chapter 1 ________________________________________________________ General Information
VAISALA_______________________________________________________________________ 15
Warranty
For certain products Vaisala normally gives a limited one-year
warranty. Please observe that any such warranty may not be valid in
case of damage due to normal wear and tear, exceptional operating
conditions, negligent handling or installation, or unauthorized
modifications. Please see the applicable supply contract or Conditions
of Sale for details of the warranty for each product.

User's Guide ______________________________________________________________________
16 ___________________________________________________________________M210862EN-A

Chapter 2 __________________________________________________________ Product Overview
VAISALA_______________________________________________________________________ 17
CHAPTER 2
PRODUCT OVERVIEW
Introduction to OMT364
The following sections provide a short overview of the Vaisala
SPECTRACAP®Oxygen Transmitter OMT364 and describe the three
different versions of the product.
The OMT364 is an optical device for measuring oxygen concentration
in gases. The instrument consists of a measurement probe attached to an
electronics enclosure. Typical applications of OMT364 include inert
gas blanketing and pharmaceutical processes in demanding
environments, where hazardous gas is present. The nonincendive
transmitter can be located in Class I, Division 2 and the encapsulated
probe in Class I, Division 1.
OMT364 in Hazardous Locations
Because of the structure of the transmitter, pay special attention to
selecting the location where the transmitter will be installed and take
into consideration the Division separation, see Figure 1 on page 19,
Figure 2 on page 19 and Figure 3 on page 20. Follow the instructions
for cabling given in the control drawing, see Appendix A, Flange
Preparation Instructions, on page 155.
CAUTION Samples in excess of 25% O2should not be measured (or appear)
in hazardous areas!

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18 ___________________________________________________________________M210862EN-A
OMT364 for In-Line and Sampling Cell Mounting
In processes with moderate temperatures (up to 80 °C) and limited
pressures (0.8 ... 1.4 bara), OMT364 can be installed directly into the
process (in-line mounting) using a mounting flange, whereas in
processes with high temperatures (> 80 °C), high pressures (> 1.4 bara)
orextremelydifficultmechanicalconditions(viscousliquidsorslurries,
adhesive materials) an extractive measurement can be made by feeding
a sample of gas into an optional sampling cell.
In in-line and sampling cell configurations the OMT364 transmitter
measures process and sampled O2concentrations of 0 ... 25 %O2. With
these configurations, it is assumed that the transmitter housing is
mountedin an environmentthat has onlynormalpressure variationsand
O2concentration of normal ambient air, approximately 21 %O2. The
environmental conditions of the electronics housing affect the O2
measurement, because O2absorption of normal surrounding air inside
the enclosure is used for realizing certain internal functions of the
measurement.
Figure 1 on page 19 and Figure 2 on page 19 contain the main
specifications for the measurement environment and mounting the
OMT364.