GASSONIC Observer-i Manuel utilisateur
HARTUSERGUIDEFOR
GassonicObserver-
i
Ultrasonic Gas Leak Detector
The information and technical data disclosed in
this document may be used and disseminated
only for the purposes and to the extent
specifically authorized in writing by Gassonic, an
MSA company.
Instruction Manual 03-14
MSA reserves the right to change published
specifications and designs without prior notice.
Part No. MANObserver-iH
Revision B/03-14
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Table of Contents
GASSONIC OBSERVER-I...........................................................................................................0
TABLE OF TABLES.....................................................................................................................V
TABLE OF FIGURES...................................................................................................................V
1.0INTRODUCTION ....................................................................................................................6
1.1SCOPE.......................................................................................................................................6
1.2PURPOSE..................................................................................................................................6
1.3REFERENCES...........................................................................................................................6
2.0DEVICE IDENTIFICATION.....................................................................................................6
3.0PRODUCT OVERVIEW..........................................................................................................7
3.1GETTING STARTED .................................................................................................................7
4.0PRODUCT INTERFACES ......................................................................................................8
4.1PROCESS INTERFACE............................................................................................................8
4.2HOST INTERFACE....................................................................................................................8
4.3LOCAL INTERFACES, JUMPERS, AND SWITCHES ..............................................................8
5.0DEVICE VARIABLES.............................................................................................................8
6.0DYNAMIC VARIABLES .........................................................................................................8
6.1PRIMARY VARIABLE = DECIBEL (dB).....................................................................................8
6.2SECONDARY, TERTIARY, AND QUATERNARY VARIABLES: NOT APPLICABLE..............9
7.0ERROR/STATUS INFORMATION .........................................................................................9
8.0UNIVERSAL COMMANDS...................................................................................................10
9.0COMMON PRACTICE COMMANDS ...................................................................................10
9.1SUPPORTED COMMANDS....................................................................................................10
9.2BURST MODE.........................................................................................................................10
9.3CATCH DEVICE VARIABLE....................................................................................................10
10.0DEVICE SPECIFIC COMMANDS.............................................................................11
10.1COMMAND #132: DO ALARM TEST......................................................................................11
10.2COMMAND #136: SET ALARM LEVEL ..................................................................................11
10.3COMMAND #139: RESET ALARM..........................................................................................12
10.4COMMAND #141: SET ALARM RELAY CONFIGURATION ..................................................13
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10.5COMMAND #142 RESET EVENT HAPPENED FLAG............................................................13
10.6COMMAND #143: READ EVENT LOGGING COUNTERS.....................................................14
10.7COMMAND #144: CLEAR EVENT LOGGING COUNTERS...................................................14
10.8COMMAND #146: READ ALARM EVENT LOG......................................................................15
10.9COMMAND #147: READ FAULT EVENT LOG.......................................................................16
10.10COMMAND #148: READ MAINTENANCE EVENT LOG........................................................16
10.11COMMAND #149: SET CLOCK...............................................................................................17
10.12COMMAND #150: READ CLOCK............................................................................................18
10.13COMMAND #151: SET RUN TIME METER............................................................................18
10.14COMMAND #152: READ RUN TIME METER.........................................................................19
10.15COMMAND #154: SET EVENT INDEX...................................................................................19
10.16COMMAND #155: GET EVENT INDEX...................................................................................20
10.17COMMAND #156: READ CALIBRATION EVENT LOG..........................................................20
10.18COMMAND #163: GET FAST CHANGING INFORMATION...................................................21
10.19COMMAND #164: GET SLOW CHANGING INFORMATION.................................................22
10.20COMMAND #165: GET SET UP INFORMATION...................................................................22
10.21COMMAND #166: GET DEVICE FIRMWARE REVISION......................................................24
10.22COMMAND #169: LOAD FACTORY DEFAULT SETTING.....................................................24
10.23COMMAND #170: SET CURRENT RANGE............................................................................25
10.24COMMAND #171: SET DETECTION MODE..........................................................................25
10.25COMMAND #172: SET ENHANCE MODE AO.......................................................................26
10.26COMMAND #192: DO CALIBRATION.....................................................................................27
10.27COMMAND #195: DO ACOUSTIC TEST................................................................................27
10.28COMMAND #201: SET ALARM DELAY TIME........................................................................28
11.0TABLES....................................................................................................................29
11.1GASSONIC OBSERVER-i DEVICE SPECIFIC COMMANDS SUMMARY.............................29
11.2GASSONIC OBSERVER-i – OPERATING MODES ...............................................................30
11.3GASSONIC OBSERVER-i – CALIBRATION SUBMODE........................................................30
11.4CALIBRATION EVENT LOG – CAUSE DESCRIPTION.........................................................30
11.5MAINTENANCE EVENT LOG – CAUSE DESCRIPTION.......................................................31
11.6ALARM EVENT LOG – DETECTION DESCRIPTION ............................................................31
11.7FAULT EVENT LOG – CAUSE DESCRIPTION......................................................................31
12.0PERFORMANCE......................................................................................................32
12.1SAMPLING RATES..................................................................................................................32
12.2POWER-UP .............................................................................................................................32
12.3DEVICE RESET.......................................................................................................................32
12.4SELF-TEST..............................................................................................................................32
12.5COMMAND RESPONSE DELAY............................................................................................32
12.6BUSY AND DELAYED-RESPONSE........................................................................................32
12.7LONG MESSAGES..................................................................................................................32
12.8NON-VOLATILE MEMORY (NVM)..........................................................................................32
12.9OPERATING MODES..............................................................................................................33
12.10WRITE PROTECTION.............................................................................................................33
13.0APPENDIX................................................................................................................34
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13.1CAPABILITY CHECKLIST.......................................................................................................34
13.2DEFAULT CONFIGURATION .................................................................................................35
13.3DEVICE DESCRIPTION LANGUAGE MENU .........................................................................36
Table of Tables
Table 1: Reference Documents.............................................................................................................................6
Table 2: Field Device Identification Data...............................................................................................................6
Table 3: Error/Status Information ..........................................................................................................................9
Table 4: Gassonic Observer-i Common Practice Commands.............................................................................10
Table 5: Gassonic Observer-i Device Specific Commands.................................................................................29
Table 6: Gassonic Observer-i Operating Modes.................................................................................................30
Table 7: Gassonic Observer-i Calibration Submode...........................................................................................30
Table 8: Gassonic Observer-i Calibration Event Log – Cause Description.........................................................30
Table 9: Gassonic Observer-i Maintenance Event Log – Cause Description.....................................................31
Table 10: Fault Event Log – Cause Description..................................................................................................31
Table 11: Command Response Times................................................................................................................32
Table 12: Capability Checklist.............................................................................................................................34
Table 13: Default Configuration...........................................................................................................................35
Table of Figures
Figure 1: Connecting a PC to a HART Device......................................................................................................7
Figure 2: Gassonic Observer-i Device Description Menu ...................................................................................36
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1.0 INTRODUCTION
1.1 SCOPE
The HART configuration of the Gassonic Observer-iultrasonic gas leak detector complies with HART
Protocol Revision 6.0. This document specifies all of the device specific features and documents HART
Protocol implementation details. The functionality of this Field Device is described sufficiently to allow
its proper application in a process and its complete support in HART capable Host Applications.
1.2 PURPOSE
This specification is designed to complement the Gassonic Observer-i Instruction Manual by providing a
complete description of this field device from a HART Communications perspective. This specification is
designed to be a technical reference for HART capable host application developers, system integrators,
and knowledgeable end users.
1.3 REFERENCES
Document Name Document Relationship
HART Communications
Protocol Specifications This is used to insure compliance with the HART
Communication Protocol.
Gassonic Observer-i
Instruction Manual This is the Gassonic Observer-iProduct Instruction
Manual.
Table 1: Reference Documents
2.0 DEVICE IDENTIFICATION
The following Table 2 is the Field Device Identification Data for the instrument.
Manufacturer’s
Name MSA Model Number Observer-i
HART ID Code 223 (DF Hex) Device Type
Code: 150 (96 Hex)
HART Protocol
Revision 6.0 Device
Revision: 1
Number of
Device Variables 0
Physical Layers
Supported 1
Physical Device
Category FSK
Table 2: Field Device Identification Data
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3.0 PRODUCT OVERVIEW
The Gassonic Observer-i is an ultrasonic gas leak detector for detecting pressurized gas leaks. The
Gassonic Observer-i detects the gas leak by measuring the sound level and reports the measurement
in decibel (dB).
3.1 GETTING STARTED
In order to enable HART communication with the Gassonic Observer-i detector, users may
employ several means including HART handheld communicators or PC-based systems. Using a PC-
based software application and a HART interface modem, for example, allow operators to access
information from the Gassonic Observer-i. A typical setup is illustrated in Figure 1.
Figure 1: Connecting a PC to a HART Device
Once the detector is installed (see Gassonic Observer-i Instruction Manual) and connected to a PC,
host application, or handheld terminal, the master will begin communication to the Gassonic Observer-i
by using the HART Command #0. The field device will then respond only if its tag matches. The data in
the reply to Command #11 is identical to that of Command #0, so the master can then construct the
Unique Identifier for use with further commands.
NOTE: The handheld device allows for the retrieval of diagnostic information and input of device
settings as needed and should not be used as a permanent part of a safety system.
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4.0 PRODUCT INTERFACES
4.1 PROCESS INTERFACE
This section describes all interfaces between the devices and the measured process.
4.1.1 Sensor Input Channels
A digital display provides indications and display codes that can be viewed through a window on the
Gassonic Observer-i. An analog signal (4-20 mA) and relays provide remote and/or discrete indications
of the detector’s operation.
4.2 HOST INTERFACE
The HART interface uses the 4-20 mA (analog output) current loop. Refer to the Gassonic Observer-i
Installation Manual for connection details.
4.2.1 Analog Output
The primary variable is proportional to the decibel (dB) sound pressure level (SPL). 4.0 mA output
current corresponds to <40 dB. 20.0 mA output current corresponds to 120 dB.
4.3 LOCAL INTERFACES, JUMPERS, AND SWITCHES
4.3.1 Local Controls and Displays
Refer to the Gassonic Observer-i Installation Manual for connection details.
4.3.2 Internal Jumpers and Switches
Refer to the Gassonic Observer-i Installation Manual for connection details.
5.0 DEVICE VARIABLES
There are no device variables available to the user.
6.0 DYNAMIC VARIABLES
There is only one Dynamic Variable available to the user.
6.1 PRIMARY VARIABLE = DECIBEL (dB)
The primary variable (PV) is proportional to the decibel (dB) SPL. 4.0 mA output current corresponds to
<40 dB. 20.0 mA output current corresponds to 120 dB.
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6.2 SECONDARY, TERTIARY, AND QUATERNARY VARIABLES: NOT
APPLICABLE
There are none defined for the Gassonic Observer-i product.
7.0 ERROR/STATUS INFORMATION
The error status, which is returned via Common Practice Command #48, is shown in Table 3
Byte Bit Description Class Device Status
Bits Set
1 0 Low Supply voltage Error 4,7
1 Not Used Error 4,7
2 Acoustic Error Error 4,7
3 Not Used Error 4,7
4 Remote Alarm Line Error Error 4,7
5 Remote Reset Line Error Error 4,7
6 Magnet Switch Error Error 4,7
7 Internal Voltage Error Error 4,7
0 8 Memory Major Error Error 4,7
9 Memory User Error Error 4,7
10 Memory HART Error Error 4,7
11 Memory Event Error Error 4,7
12 Peak dB Low Status 4,7
13 Not Used Error 4,7
14 Not Used Error 4,7
15 Not Used Error 4,7
Table 3: Error/Status Information
These bits may be set at power up to indicate an instrument failure. They may also be set by a failure
detected during continuous background diagnostic testing.
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8.0 UNIVERSAL COMMANDS
Command 3 returns the current loop variable and the primary variable for a total of 9 bytes returned.
Command 9 returns the PV only.
9.0 COMMON PRACTICE COMMANDS
The following common practice commands are implemented.
9.1 SUPPORTED COMMANDS
The following common-practice commands shown in Table 4 are implemented:
Command
Number Byte
Number Meaning
Command 38 N/A Reset Configuration Changed Flag
Command 48 0 Returns Priority Fault, High Byte
Command 48 1 Returns Priority Fault, Low Byte
Command 48 2 Returns Error Status (same as Modbus register x02), High Byte
Command 48 3 Returns Error Status (same as Modbus register x02), Low Byte
Command 48 4 Returns Power Cycled Flag
Command 48 5 Returns Event Happened Flag
Command 48 6 Returns 0x01 = “Maintenance Required” or 0x02 = Alarm or Warning
Command 48 7 Returns 0
Table 4: Gassonic Observer-i Common Practice Commands
9.2 BURST MODE
The Gassonic Observer-i does not support Burst Mode.
9.3 CATCH DEVICE VARIABLE
This Gassonic Observer-i does not support Catch Device Variable.
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