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Gassonic Observer-H Instruction Manual

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1. 7 f BINH ON call FSUE 2 an A 660 e yoyem 1891 mun onsnooy 8 2es 09 19594 spuooes Aejdsiq epojy 40413 Ly 1899 Sul 298 09 1eseM 19s9M EE iagram User Menu Di Figure 8 Page 21 Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 5 7 1 FORCED ACOUSTIC TEST This will enable the local operator to test the acoustic properties of the unit Activate the MENU switch with the magnet stick The code ATOF Acoustic Test Off will be displayed Activating the UP switch A will display the command followed by the sound level detected by the microphone emitted from the sound source If this value is flashing the unit is failing the acoustic test There could be a number of causes for this error see Section 5 3 for more information The DOWN switch V will stop the acoustic test and display Activating the ENTER switch at any time during this operation will display DONE and take the unit back to Normal Operation A maintenance event will be recorded If no switch is activated for 60 seconds the detector w
2. 37 7 1 BAUD RATE 37 Rn 37 73 MODBUS READ STATUS PROTOCOL QUERY RESPONSE ssssssssssssssssssssssssssesssesssessscssscesecsssessseeseess 37 7 3 1 MODBUS READ QUERY MESSAGE cscsssssossssssssesssesssucssucssecssucssusssscsesecssccessesseceaceeseesssessutssacssaeesaceseeessees 37 7 3 2 MODBUS READ RESPONSE MESSAGE cssssssssesssesssesssosssosssocsssecsssessecsssessscsssessucssuessusssacseseeracessseraceesses 38 74 MODBUS WRITE COMMAND PROTOCOL QUERY RESPONSE csssssssssssssesssesssssssesssecssecssecsseeesseeseess 38 7 4 1 MODBUS WRITE QUERY MESSAGE ccsssssosssossssesssesssesssuccsosssecssusssuscssccsssesssessscssucssseessessuessucesavesacesaceesees 38 7 4 2 MODBUS WRITE RESPONSE MESSAGE erret rentrer tette 39 7 4 3 FUNCTION CODES SUPPORTED sssssesssesssesssusssssssscssuscsussssssssessssesssesssesseesssessscssucssueesacssacesacesucesacessacesees 39 7 5 EXCEPTION RESPONSES AND EXCEPTION CODES ssssssssssessossssecsscesscssscssucsssesssesssessucssucsssesssesseceseess 39 7 5 1 EXCEPTION RESPONSES ccscsssssosssosssssssosssscessecsssessucssusssussessssscssuessssceacesseessessscesucssuessaceracseseestaveracesaverees 40 7 5 2 EXCEPTION CODE FIELD cs cssscssssssssosscossscccsscssssossssstcsstessessscsssessosssosesucessessosssoseersuesauerstesauessacssacesaesoes 40 7 6 COMMAND REGISTER LOCATIONS rere tette tte
3. sss Ps sog 40 7 6 1 OPERATIONAL MODE 40 77 OBSERVER H COMMAND REGISTER DETAILS reete teretes tenerse 45 qd SANAEOG OON NECK A A 45 7 7 2 MODE 01H 45 7 7 3 PRIMARY FAULT STATUS ERROR 1 2 46 7 7 4 FAULT STATUS ERROR 2 08H iusticie rtt ue vt Pec Rd 47 7 7 5 MODEL TYPE OAH 47 7 7 6 SOFTWARE REVISION MAJOR O5H enne tenente testet ette tette esos sss aanas 47 7 7 7 DB LEVEL 06H NRR n 48 24 8 SOUND a AOAO A 48 7 7 9 UNIT TEMPERATURE ccsssosssoessosssosssoccsseesssessucssuessucssucssucssuecssccesceessesssessucssecsasesssesscssacesaseesacesaverees 48 7 7 10 MODBUS DISPLAY OAH c cssssssssosssoscsssessesssscssussssessecssucssuesssccesscsssesssessseesuessuecsanseutssacesacessacesavesees 48 7 7 11 SERIAL NUMBER OBH OCH cssssssscesssesssssssessseessucssusssuesssscsossssessusseseessceessessscssucssucsasessscssavesaueseavesaeesees 48 2 2 49 TRIGGER ODH sinistri tete terti tnt ort ate 48 7 7 13 TRIGGER DELAY OEH cccccesssosssosssosssosssssssosessscssscssscssusssucssusssucssuessecceseesaseesuesnsesascsssessuessseessseesavssacesacerees 48 7 7 14 COMM 1 ADDRESS OFH cssccs
4. H 13 5 2 NORMAL OPERATION tiir FO ore ealada odios 13 5 3 SETUP 13 531 TRIGGER EVEL ERE Uit MM M MM D E E A IE LE TEN 14 5 3 2 TIME DELAY 14 5 3 3 ALARM RELAY ENERGIZED DE ENERGIZED 14 5 3 4 ALARM RELAY QUE uS 14 5 3 5 MODBUS 14 9 53 67 et 14 S9 nr P Ie eec 14 5 4 ACOUSTIC SELF TES t 15 5 5 INPUTS 15 5 6 OUTPUT METHODS tae tia a eat tud eso tante tun Rene Sms NENE 15 REEAY horae me co esent idis Ond M 16 5 6 2 ALARM RELAY OUTPUT ettet tete Mate eee Va o d etu ui indue tud dE rS 16 96 37 420MA OUTPUT BOE REDE IM MEER E e MP EUM dE 16 5 6 4 ERROR 7 ritiro VAR USER ERR RANK CK ER RN UAE 17 5 7 USER DISPLAY Gc MAGNE TIINTEREAC E dote Peut een tp toten dose odd dodo 20 5 1 FORCED ACOUSTIC EF n SEU YR ERR EE RENE RENE UAE 22 5 2 3SEHING CHECKING TRIGGER LEVEL iiio i t en Se Kraus ne eee 22 5 43 SEITING CHECKING DELAY TIME cain RR SEEN EN Fu CH GE 23 5 7 4 SETTING CHECKING ALARM RELAY ENERGIZED DE
5. HazardWatch indicates when a successful calibration takes place In HazardWatch mode the current goes to 3 2 mA for 5 seconds then to 4 0 mA An aborted calibration would go straight to 4 0 mA This is a read write only register Reading returns the state of the HazardWatch ON OFF Writing a 1 will turn on HazardWatch a 0 will disable EXCEPTIONS an illegal data value is entered must be between 0 1 then the Exception Code 03 Illegal Data Value is returned Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 51 7 7 25 RELAY STATE The relay state register is read only The bit position shows which relay is on Function Hex Value Alarm Relay Energized 0 0001 1701 LED Energized 0x0004 Fault Relay Energized 0x0002 Table 23 Relay State 7 7 26 ALARM LATCH 1BH The alarm latch register is read write A read returns if the alarm latch is enabled not A write enables or disables latching One is latch zero is non latched EXCEPTIONS an illegal data value is entered must be between 0 1 then the Exception Code 03 Illegal Data Value is returned If the Observer H hears a gas leak greater than the trigger when the command is received a Code 06 device busy exception will be returned 7 7 27 RELAY ENERGIZE 1CH The relay energized register is read write A read returns if the alarm relay is normally energized or not One is energized a zero is de energiz
6. will switch the factory Default OFF Activating DOWN switch V the will switch the factory default ON Activating the ENTER switch having changed the status ON OFF will flash SAVE on the display Confirm the SAVE action by activating the ENTER switch once more Activating the MENU switch while SAVE is flashing will discard the SAVE and switch the unit back to normal operation If ENTER is activated the unit will display DONE to confirm that the changes have been saved and return to normal operation The operator can change the HART setting and if desired move to the next item Baud Rate in the menu structure by activating the MENU switch straight after the change The change will be saved at a later stage by activating the ENTER switch at any point in the menu structure If no switch is activated for 60 seconds the detector will return to normal operation without saving the changed settings By disabling the HART HTOF the channel two option of the Modbus setting will be accessed Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 28 If HART is Enable Activating the MENU twelve times will switch unit to Normal Operation If HART is Disable HTOF Activating the MENU fifteen times will switch the unit to Normal Operation 5 7 9 MODBUS SETTING BAUD CHANNEL ONE Activating the MENU switch nine times will display the default setting Baud rate B192 19
7. 59 seconds Observer H H maintenance Numeric op Numeric ve Total maintenance event Numeric 0x0056 Maint Count AER 0 65535 m Calibration Event Log Run ime Hi Running Time Hi for Numeric ES DOS Time Hi calibration event log entries Value Run Time Lo Running Time Low for Numeric 0x0058 Time Lo calibration event log entries Value s 0x0059 Clock Time Hi Hi byte lt year Lo byte Numeric 1 99 year d month calibration clock time Value 1 12 month 0x005A Clock Time Hi byte Day Lo byte Hour Numeric 1 31 day Mid calibration clock time Value 0 23 hour 0x005B Clock Time Hi byte Minute Lo byte Numeric 0 59 minutes 5 Low second calibration clock time Value 0 59 seconds Numeric Ox005E Cal Count Total calibration event count 0 65535 Clear MISCELLANEOUS USER REGISTERS 0x0060 Numeric User information registers 0 65535 COO Receive Errare channel Zrecave crors 1078886 R Receive Errors channel 2 receive errors _ Value ERBEN weed ACE Lem eem Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 44 Address Function I O Range R W Oo Errors 0x0074 Ch2 Register Number of Modbus channel 2 Numeric 0 65535 Errors register errors Value Ch2 CRC Hi Number of Modbus channel 2 Nu
8. Access 8 None 8 N 1 00 Read Write 8 Even 8 E 1 01 Read Write 8 Odd 8 0 1 02 Read Write 8 None 2 8 N 2 03 Read Write Table 19 Comm 1 Data Format This function is indicated on the Low Data Byte and the High Data Byte is not used EXCEPTION If an illegal data value is entered which is not listed above then the Exception Code 03 Illegal Data Value is returned NOTE The default Data Format is 8 N 1 7 7 17 COMM 2 ADDRESS 12H A read returns the Comm 2 address of the Observer H A write changes the address to the requested address The range of the address is 1 to 247 01 to F7 Hex After the address has been changed to the slave unit the Modbus communications will cease because the address has changed therefore the master will have to change its query address to the slave s new address in order to restart the communications EXCEPTION If an illegal data value is entered must be between 1 0x00F 7 then the Exception Code 03 Illegal Data Value is returned NOTE The default address is 2 Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 49 7 7 18 COMM 2 BAUD RATE 13H A read returns the Comm 2 baud rate of the Observer H A write changes the baud rate to the requested baud rate After the baud rate has been changed to the addressed unit the Modbus communications will cease because the baud rate has changed therefore the master will have to change its baud rate
9. Decimal Value Value Display Fault Code Table 16 Fault Status Error 2 7 7 5 MODEL TYPE 04H A read returns the Decimal Value indicating the model number The Observer H model number is 6000 Notice If a newer Observer H is designed to replace the Observer H the model number will be different 7 7 6 SOFTWARE REVISION MAJOR 05H A read only accessible register contains the major user alphanumeric revision value of the Observer H embedded software expressed in 2 ASCII characters REV A appears as a blank and the letter A Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 47 7 7 7 DB LEVEL 06H A read only accessible register contains the value of the measured sound pressure level expressed in decibels 7 7 8 PEAK SOUND 07H read only accessible register contains the acoustic test peak sound level expressed in decibels 7 7 9 UNIT TEMPERATURE 08H A read only accessible register contains the value of internal unit temperature expressed in 0 1 C units These functions are indicated on the Low Data Byte and the High Data Byte is not used 7 7 10 MODBUS DISPLAY OAH 09H A read only accessible register contains the upper two ASCII characters shown on the Observer H display A read only accessible register contains the lower two ASCII characters shown the Observer H display 7 7 11 SERIAL NUMBER OBH OCH The serial number is a 32 bit word bu
10. INSTALLATION AND USER GUIDE FOR GASSONIC OBSERVER H ULTRASONIC GAS LEAK DETECTOR T E C H N Gassonic This page intentionally left blank INSTALLATION AND USER GUIDE FOR GASSONIC OBSERVER H ULTRASONIC GAS LEAK DETECTOR This page intentionally left blank Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 2 Table of Contents 1 0 TECHNICAL DATA ON THE GASSONIC OBSERVER H 6 2 O pie DUCTION EMT 1 3 0 GENERAL DESCRIPTION AND T 3 1 AREA MONITORED BY THE GASSONIC OBSERVER H 8 3 2 DEIFCTOR ODTPUUTS tere ere ete Tre eee ADEM are rn E dM EE 9 A OUINS TAELA TION e 9 4 1 MECHANICAL CONSTRUCTION 9 4 2 MECHANICAL OPERATION AND 11 4 2 1 SPEGIFICCONDITIONS OF USE 11 4 3 MOUNTING 141 4 4 WIRING DIAGRAM ss tetas ane va nb a eee 12 4 5 PROTECTIVE EARTH GROUNDIIN Gis a Ek 12 OPERATION AND SETUP 13 5 1 RECEIPT zs
11. Power Cycle Flag 0x35 This reads whether the time of day clock has been reset after power has been re cycled to the unit If the time has been reset this flag will be 0 otherwise the flag will 1 Event Index 0x36 This is used to indicate which of the stored events the user would like to read There are 5 event logs Warning events Alarm events Fault events Calibration events and Maintenance events Each of these event logs consist of 10 of their most recent occurrences The user is able to read the logs of each of these by setting this event index followed by a reading of the desired event log The event index is a number from O to 9 Zero refers to the most recent event and 9 refers to the least recent event stored in the log For example to read time of the most recent Warning event in the Warning event log set this register to O and then read registers OxB8 and 9 for the running time in seconds or read registers OxBA OxBB and OxBC for the clock time Reserved 0x37 Alarm Running Time in Seconds Hi Word 0x3F This register reads the high word of the running time in seconds when the alarm event occurred This time is in seconds since January 1 2000 Alarm Running Time in Seconds Low Word 0x40 This register reads the low word of the running time in seconds when the alarm event occurred This time is in seconds since January 1 2000 Alarm Clock Time Year Month 0x41 Alarm Structure Hi These reg
12. UNITED KINGDOM Heather Close Phone 44 1625 619 583 Lyme Green Business Park Fax 44 1625 619 098 Macclesfield Cheshire Email info generalmonitors co uk United Kingdom SK11 OLR IRELAND Ballybrit Business Park Phone 353 91 751175 Galway Fax 353 91 751317 Republic of Ireland Email info gmil ie SINGAPORE No 2 Kallang Pudding Rd Phone 65 6 748 3488 09 16 Mactech Building Fax 65 6 748 1911 oingapore 349307 Email genmon gmpacifica com sg MIDDLE EAST LOB12 G20 Phone 971 4 8815751 P O Box 61209 Fax 971 4 8817927 Jebel Ali Dubai Email gmme gemirates net ae United Arab Emirates The Observer H is manufactured at this location Table 29 General Monitors and Gassonic Offices Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 64 9 0 APPENDIX 9 1 WARRANTY General Monitors warrants the Observer H to be free from defects in workmanship or material under normal use and service within two years from the date of shipment General Monitors will repair or replace without charge any such equipment found to be defective during the warranty period Full determination of the nature of and responsibility for defective or damaged equipment will be made by General Monitors personnel Defective or damaged equipment must be shipped to the General Monitors plant or representative from which the original shipment was made In all cases this warranty is limited to the cost
13. 7 7 48 USER DATA 60H 6F There is a section in memory that allows the user to store information This is useful if the physical location or other user identification is required The only restriction on the information is it must be Modbus compatible Only one word can be written per command There are a total of 16 words for the user 7 7 49 COMM 2 BUS ACTIVITY RATE 71H A read indicates the Comm 2 Bus Activity Rate in percent of this slave s addressed node versus other addressed nodes Range of this value is in hex 0 64 which translates to decimal 0 100 7 7 50 COMM 2 FUNCTION CODE ERRORS 72H A read indicates the number of Comm 2 Function Code Errors that occurred in the slave device The maximum count is 65535 and then the counter rolls over to zero and begins counting again 7 7 51 COMM 2 STARTING ADDRESS ERRORS 73H A read indicates the number of Comm 2 Starting Address Errors that occurred in the slave device The maximum count is 65535 and then the counter rolls over to zero and begins counting again 7 7 52 COMM 2 TOTAL RECEIVE ERRORS 74H A read indicates the total Modbus Comm 2 Only Receive Errors that occurred in the slave device These are address function etc type of errors The maximum count is 65535 and then the counter rolls over to zero and begins counting again 7 7 53 RXD CRC ERRORS HI 75H A read indicates the number of RXD CRC Errors that occurred in the slave device The maximum count is 6
14. 0 INTRODUCTION The Gassonic Observer H is an ultrasonic gas leak detector for detecting pressurized gas leaks The Observer H utilizes advanced acoustic technology to detect gas leaks and incorporates a patented Senssonic self test system for failsafe operation Industry standard output and communications options are included in the Observer H to provide flexible integration in a broad range of applications This user manual describes the installation operation and maintenance of the Observer H to ensure optimal performance GENERAL DESCRIPTION AND FEATURES The Gassonic Observer H detects leaks from pressurized gas systems by sensing the airborne ultrasound produced by the gas escaping This detection method is omni directional It can function in extreme weather conditions and is ideal for monitoring leaks from valves and flanges in complex pipeline systems both onshore and offshore The detector has the following certifications ATEX IECEx FM CSA HART and IEC 61508 The detector housing is casted AISI 316L acid proof stainless steel and the ingress protection is IP66 with a NEMA rating of Type 4X The performance of the Gassonic Observer H as a safety device is not covered by the ATEX certificate Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 7 Detection Coverage Characteristics Ground Level aud HIGH HOISE AREAS LOW NOISE AREAS VERY LOW NOISE AREAS OT Lone Ma
15. 1 Error fault indication normally energized 250 Relay 2 Indication of alarm trigger level reached 250 INPUT SIGNALS Alarm relay reset Open or ground Alarm test Open or ground Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev 09 11 GAS LEAK DETECTION COVERAGE REF METHANE Ultrasonic background noise lt 74 dB low nose areas 12m radius leak rate 0 1 kg sec 8m radius leak rate 0 03 kg sec Ultrasonic background noise lt 84 dB high noise areas 8m radius leak rate 0 1 kg sec 4m radius leak rate 0 03 kg sec CERTIFICATIONS ATEX IECEx Ex d ia IIB H2 Gb Ex tb T85 C Db Ta 40 C to 60 C FM 11 IECEx FMG 11 0003X 4 1200 FM CSA Class I Div 1 2 Groups B C D Class 11 111 Div 1 2 Groups E F G 40 C to 60 Functional Safety per IEC 61508 HART Protocol Rev 6 Emerson AMS Aware INGRESS PROTECTION IP66 Type 4X CONSTRUCTION Stainless steel AISI 316L Weight 7 5 kg Page 6 LED OUTPUT DIMENSIONS On for alarm Diameter 203mm Width 203mm SERIAL DIGITAL COMMUNICATION Height 201mm Dual Modbus or Single Modbus and HART HART Input Impedance Source C1 2nf 177K RF EMISSIONS AND IMMUNITY Sink C4 0nf 178 K Tested according to EN 61000 6 2 EN 61000 6 4 ENVIRONMENTAL DATA Operational temperature range 40 C to 60 C Humidity to 95 non condensing 2 0 3
16. 15H A read only accessible register contains minor internal numeric revision value of the Observer H embedded software expressed in 2 ASCII characters 7 7 21 RESET ALARM 16H Writing a 1 to this register will reset the alarm relay EXCEPTIONS an illegal data value is entered must be between 0 1 then the Exception Code 03 Illegal Data Value is returned Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 50 If the Observer H hears gas leak greater than the trigger when command is received a Code 06 device busy exception will be returned 7 7 22 SUB MODE 17H This is a read only register It is used to tell the control system the states of calibrate mode Calibrate Sub Mode Number returned Apply 1701 0 0001 Calibration in progress 0x0002 Calibrate OK 0x0008 Calibrate error 0x0010 Calibration adjustment 0x0004 Table 22 Calibrate Sub Mode 7 7 23 ACOUSTIC TEST 18H This is a write only register Writing a 1 to this register will activate an acoustic test This is a one cycle test During the test the display will show COM The current will go to 3 0 mA EXCEPTIONS If an illegal data value is entered must be between 0 1 then the Exception Code 03 Illegal Data Value is returned If the Observer H hears a gas leak greater than the trigger when the command is received a Code 06 device busy exception will be returned 7 7 24 HAZARDWATCH 19H
17. Alarm clock time Value 1 12 month 0x0042 Clock Time Hi byte Day Lo byte Hour Numeric 1 31 day Mid Alarm clock time Value 0 23 hour 0x0043 Vect Time Hi byte lt Minute Lo byte Numeric 0 59 minutes second Alarm clock time Value 0 59 seconds Numeric Numeric 0x0046 Alarm Count Total Alarm Event Count 0 65535 mE Fault Event Log er Ram Time Hi 06093 R oos Run Timeto ees 0589898 R mee Clock Tine rdum _ ime P month Fault clock time Value 1 12 month Mid Fault clock time Value 0 23 hour _ Vae orm R Low second Fault clock time Value 0 59 seconds Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 43 Address Function I O Range R W Numeric 0 004 Fault Count Total Fault Event Count 0 65535 EN Maintenance Event Log f Running Time Hi for 0x004F Run Time Hi Maintenance Event log IE 0 65535 entries Running Time Low for Numere 0x0050 Run Time Lo Maintenance Event log Value 0 65535 entries Hi byte year Lo byte e 0x0051 Clock Time Hi month Maintenance clock le jer time alue 1 12 month 0x0052 Clock Time Hi byte Day Lo byte Hour Numeric 1 31 day Mid Maintenance clock time Value 0 23 hour Hi byte Minute Lo byte 0x0053 second Maintenance clock pots 0 59 minutes alue 0
18. C 3 12 Page 46 Bit Position 7 6 5 4 3 2 1 0 Fault Internal Magnet Reset Alarm Not Acoustic Not 24V Description Voltage Switch Switch Switch used Test Used Low Line Hex Value Ox0080 0 0040 0 0020 0x001 0x0008 0 0004 0 0002 0 0001 0 Decimal 128 64 32 16 8 4 2 1 Value Display EINV EMAG ERSW EASW ERAC ERV Fault Code Table 15 Fault Status Error 1 See the ERROR OUTPUT Section for explanation of errors Bit 13 is a special bit for Modbus and HART If the Observer H is in acoustic test this bit is a one if the acoustic sound level is above the desired level It is a zero if it is below the desired level This allows the system to quickly know if there is an acoustic test problem Bit 15 is a if any of the lower level faults are present The system can now drill down and find the root cause This is not normally required at the system level only at a test station 7 7 4 FAULT STATUS ERROR 2 A read only accessible register contains the bit map for any internal error that is present The following table shows the faults that are represented by each bit in the register Bit Position 15 14 13 12 11 10 9 8 EAE Description 3 RAM RAM RAM RAM Flash Flash Flash Decimal Value s2768 16384 6192 f s096 2048 E Display Fault N A N A N A N A Code Bit Position Fault Critical 5 12 Current rums Flash Flash Ref Ref Value T EN 0 0x0004 CE
19. ENERGIZED eene 24 5 7 5 SETTING CHECKING ALARM LATCHING ON OFF nnne nnn nnne 25 5 7 6 SETTING CHECKING FACTORY DEFAULT ON 26 5 7 7 SWITCHING HAZARDWATCH MODE 27 SNS O 28 5 7 9 MODBUS SETTING BAUD CHANNEL ONE nio thee tetur arie etin ce deua ruota aieo 29 5 7 10 MODBUS SETTING FORMAT CHANNEL ONE 30 5 7 11 MODBUS SETTING ADDRESS CHANNEL ONE eren nennen 31 5 6 12 BAUD CHANNEL TWO a eri abel ovem dem 33 5 7 13 FORMAT CHANNEL TWO Ren en S rnb e 33 ADDRESS CHANNEL TWO DES tn ERE ade M M M D SEE ERE 34 Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 3 6 0 GAIN TEST AND CALIBRATION uua tuus 35 6 1 GAINTEST 35 62 JGALIBRATION e nen ref olet ra e a Fo Foe Vn cene en 35 7 0 MODBUS DIGITAL INTERFACE
20. Errors that occurred in the slave device The maximum count is 65535 and then the counter rolls over to zero and begins counting again 7 7 59 MODBUS CAL ERROR 7BH Calibrate error register is read only A 1 shows there was a calibration error 7 7 60 CLEAR COMM 2 UART ERRORS 7CH Writing a O to the bit activates the Clear Comm 2 UART Errors function which resets all of the Modbus UART Error counters to zero The function is active momentarily and will reset automatically after being used 7 7 61 CLEAR COMM 2 MODBUS ERRORS 7DH Writing a O to the bit activates the Clear Comm 2 Modbus Errors function which resets all of the Modbus Error counters to zero The function is active momentarily and will reset automatically after being used 7 7 62 INPUT VOLTAGE 8DH The Input voltage register is read only A read returns the input voltage This allows the user to remotely read the actual input voltage via Modbus Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 63 8 0 CUSTOMER SUPPORT 8 1 GENERAL MONITORS OFFICES Customer Support Area Phone Fax Email Toll Free 1 800 446 4872 Phone 1 949 581 4464 Fax 1 949 581 1151 Lake Forest CA 92630 Email info generalmonitors com 9776 Whithorn Drive Phone 1 281 855 6000 Houston TX 77095 Fax 1 281 855 3290 Email gmhou Qgeneralmonitors com Phone 45 44 700 910 Fax 45 44 700 911 DK 2750 Ballerup Email mail gassonic com Denmark
21. Normal operating mode of the instrument Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 45 e Acoustic Test This bit is set anytime an acoustic test is taking place The request of the acoustic test can be from the magnet a timed acoustic test a HART request or a Modbus request e Calibrate This bit is set anytime a calibration is taking place The request of the calibration test can be from the magnet a timed acoustic test a HART request or a Modbus request Fault This bit is set any time the Observer H has a fault Setup Indicates the user has activated a magnet and is in setup mode e Alarm Test This indicates someone has activated the alarm test This can be done via a remote switch HART or Modbus e Calibration Pending The Cal pending bit is used to indicate an intermediate state e Piezo Calibration This bit is not used in normal operation It is used only when the piezo microphone is replaced It is set when the technician calibrates the piezo e Alarm This bit is used when the Observer H detects dB greater than the trigger level If the Observer H is latched it will stay in alarm mode until the reset relay is activated Show Rev This bit is set during the time someone has activated the show rev by using an UP amp DOWN magnet WRITE A write to the mode register 01 with the proper bit set will cause the Observer H to change modes Not all modes can be activat
22. Referenced to Observer H st Slave Address 1 247 Decimal Observer H ID Address 1 2 Function Code 83 or 86 Hex MSB is set with Function Code 01 06 Appropriate Exception Code See below 4 CRC Lo 00 FF Hex CRC Lo Byte p CRC Hi 00 FF Hex CRC Hi Byte Table 11 Exception responses 7 5 2 EXCEPTION CODE FIELD In a normal response the Observer H returns data and status in the data field requested in the query from the master In an exception response the Observer H returns an exception code in the data field which describes the condition that caused the exception Below is a list of exception codes that are supported by the Observer H Description Illegal Function The function code received in the query is not an allowable action for the Observer H Illegal Data Address The data address received in the query is not an allowable address for the Observer H Illegal Data Value A value contained in the query data field is not an allowable value for the Observer H Slave Device Failure unrecoverable error occurred while the Observer H was attempting to perform the requested action Acknowledge The Observer H has accepted the request and is processing it but a long duration of time will be required This response is returned to prevent a timeout error from occurring in the master Device Busy The Observer H is engaged in processing a long duration program command
23. Representative or General Monitors directly and give the following information Part Number of Spare Part or Accessory Description of Spare Part or Accessory Quantity of Spare Part or Accessory 9 3 1 INSTALLATION DRAWINGS 805560 Wiring Drawing 9 3 2 CALIBRATION EQUIPMENT 80510 1 1701 Portable Calibrator 9 3 3 SPARE PARTS Description Part Number Allen Screw M6x20 928 381 Lock Washer 928 651 Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 67 Description Part Number Screw M4 x 16mm Relay Board 928 393 Mounting Table 33 Replacement Parts 9 3 4 MICROPHONE REPLACEMENT To replace the microphone remove the windscreen Loosen the microphone 80332 1 and carefully replace with a new microphone When removing the microphone be careful not to move or damage the pre amplifier contact spring as this can affect the performance of the unit Also be careful not to cross threads when replacing the microphone The microphone should screw in smoothly Replace the Windscreen and perform a calibration per the calibration procedure ___ PRE AMPLIFIER CONTACT SPRING MICROPHONE _ WINDSCREEN Figure 10 Microphone Replacement 9 3 5 SOUND SOURCE ASSEMBLY REPLACEMENT To replace the sound source assembly 805554 1 loosen the 2 M4 screws Remove the old sound source assembly and discard the o ring Replace the new o ring and plug the two pins connector to the sound source assemb
24. The master should retransmit the message later when the slave is free Table 12 Exception Code Field 7 6 COMMAND REGISTER LOCATIONS 7 6 1 OPERATIONAL MODE COMMANDS oee Section number listed below and reference Section 7 7 for details of each register NOTE The Observer H has Modbus error reporting The optional dual Modbus has error reporting for each channel It can also provide simultaneous block mode Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 40 R indicates Read Only Access R W indicates Read Write Access Address Name Function Type I O Range GENERAL USER REGISTERS 0x0000 Analog Output Scaled 0 20 mA current Numeric 0 21 7mA output Value expressed in uA 0x0001 Moe Set view operating mode E See description RW Bit EC HC SET TRES Bit E 0x0003 Fault Status2 Internal status errors See description 0 0004 Model ___ 0x0005 Software Rev Embedded software major ASCII Alphanumeric Hi revision chars 0x0006 Sound Level Sound pressure level dB 45 110 dB 0x0007 PeakSound PeakSound Peak sound level dB Era E S Numeric 06 6 0x0008 Temperature Unit temperature in 0 1 C Vane oo in 0 1 oxooog pisplay Chars Display MSD and MID ASe See description ES Display Chars Display MID2 and LSD ASCII see description Lo chars Ox000B Serial No Hi seta NUD Ste poe
25. Value 1 present EVENT LoGGING REGISTERS 0x0030 Run Time Hi Read Set run time seconds Numeric 0 65535 R W High word Value 0x0034 RU TIEN Read Set run time seconds Numeric 0 65535 R W Low word Value XE id Sc Read Set year and month Numeric 4 _ go year 0 0032 Month i of Real Time Clock RTC Value 4 42 month R W Real Time Clock Read Set day and hour of Numeric 14 34 day Value 0 23 hour Day Hour 0 59 minutes 0 0034 Read Set minutes and 0 59 seconds R W Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 42 Address Name Function Type I O Range Clock seconds of RTC Value Minute Second 0 Time not Power Cycled Time Reset After power Numeric 0x0035 Flag Cycled Value Reset 1 Time Reset Numeric 0x0036 Event Index Index of Logged Events ET I Reserved Reserved Resena me O58 Reserved Reseno atin Reserved Ree Matis R 00088 Reserved 00098 Reserved Ree R 100090 Reserved Resened R 00080 Reserved _ Ree 0900 Reserved Reed Alarm Event Log Run Time Hi Running Time Hi for Alarm Numeric r3 RunTimeHi Event log entries SEE Run Time Lo Running Time Low for Alarm Numeric _ RJ 0x0040 Run Time Lo Event log entries Value Clock Time Hi byte 7 year Lo byte Numeric 1 99 year x Hi month
26. center for repair User Memory Error User memory includes the trigger level delay time latched non latched energized non energized Modbus setting or any other user changeable settings This error indicates one or more of these values is wrong Action Cycle power The error will go away but the data is still not correct The user must restore all user settings HART Memory Error A HART memory register has an error These registers contain HART user settings This error indicates one or more of these values are incorrect Action Cycle power The error will go away but the data is still not correct The user must restore all HART information Event Memory Error Event memory has an error Some or all of the event information is incorrect This error indicates one or more of these values are wrong Action Cycle power The error will go away but the data is still not correct The Observer H has four different memory blocks that are periodically checked The user is notified via this Error Fault Output function if an error occurs with any of these memory locations When HART is selected the output current changes to comply with the HART Foundation requirements The HART Foundation does not specify current below 3 5 mA In normal HART mode the actual current does not go below 3 5 mA Modbus reports the analog output as if HART was not there This allows users to use a consistent Modbus program When the alarm relay is
27. cnt nea DEPO a Qi DERE RED bv DR D vec iE anten icc E es 65 9 2 2 gt APPROVALS67 9 3 SPARE ACCESSORIES ET OVE CUYO VS auntie 67 9x1 INSTALLATION DRAWINGS s umida qub IE Eu IRE EH ERES OR RUE 67 332 CALIBRATION EQUIPMENT eh e bee ie beoe bera ean ce nett 67 93 LU M I NM MM 67 9 3 4 MICROPHONE REPEACEMEDNUT nator pietre eet es eerte eR PR ERE FRE EE FREE 68 9 3 5 SOUND SOURCE ASSEMBLY 68 Installation and User Guide for Gassonic Observer H MANOBSERVER H C 3 12 Page 5 1 0 TECHNICAL DATA ON THE GASSONIC OBSERVER H ACOUSTIC SPECIFICATIONS Microphone unit Detector frequency range 25kHZ 70 kHz Dynamic range 58 db 104 dB TEST SOUND SOURCE Test frequency 40 kHz 3 kHz Sound Pressure 100 dB 68 mm from the sound POWER REQUIREMENTS Input voltage 15 36 VDC Um 250 Vrms 15 volts maximum current consumption 250 mA 24 volt maximum current consumption 170 mA OUTPUT CURRENT Analog 4 20 mA interface maximum permitted load resistance is 600 C O mA Start up 1 mA Pulsed Acoustic error O mA Other Errors 3 mA Unit inhibit 4 20 mA 58 dB 104 dB Source or Sink output RELAYS Relay
28. drops below 12 5 VDC When the supply returns to normal the Observer H will go back to start up Action Ensure that the supply voltage is at least 14 VDC at the Observer H Acoustic Error The Observer H has failed the acoustic test Action Make sure the foam and all acoustic parts are clean Remote Alarm Switch Stuck The remote alarm is closed for 60 Seconds Action Check the wiring on the remote alarm Once the short circuit is cleared the unit will return to normal operation Remote Relay Reset Switch Stuck The remote reset is closed for 30 Seconds Action Check the wiring on the remote reset switch Once the short circuit is cleared the unit will return to normal operation Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 18 Magnetic Sensors Stuck The magnetic sensor stuck is closed for 60 Seconds One of the four magnet switches or a cable is shorted Action If the magnetic switch is shorted the unit must be returned to the factory or authorized service center for service Internal Voltage Error The possible errors are an internal voltage is not at the proper value or a circuit is not functioning properly Action An internal error has occurred The unit must be returned to the factory for service Critical Memory Error This is a main memory error and the Observer H may not function correctly Action The unit must be returned to the factory or authorized service
29. latched the current and display follows the present dB The relay will return to normal after the relay reset is activated via Modbus HART or remote switch Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 19 The unit will have Inhibit output when Setup Calibrate or Acoustic Test Mode are activated This activation can take place via display magnets HART or Modbus 5 7 USER DISPLAY amp MAGNET INTERFACE The User Interface consists of a four digit LED display window and four magnetic switches to enable a local operator to confirm or change settings without opening the unit When the user interface is used the Observer H will change to setup mode The setup mode consists of the following tests Analog Output 3 5mA HART Enable 3 0mA HART Disable The Observer H User Menu Diagram is captured on the following page Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 20 24 EN 3AVS sebueu gt S9A NOMEA nuo SR 9AES JON 104 PIOH Tug 1384 dn snqpow 7 ou j M 7 7 00 J an al REN CI nueiN nue 6 19 4 HeH SJA S 7905809 101 JO
30. operation If ENTER is activated the unit will display DONE to confirm that the changes have been saved and return to Normal operation The operator can change the address settings time and if desired move to the next item Baud Rate in the menu structure by activating the MENU switch straight after the change The change will be saved at a later stage by activating the ENTER switch at any point in the menu structure More info for Modbus protocol is available in Section 7 If no switch is activated for 60 seconds the detector will return to normal operation without saving the changed settings Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 31 HART Enable Display will shows gt 58 normal operation If HART is Disable Display will shows B182 channel 2 Baud If HART is enabled factory default is ON Channel 2 will not appear Activating the MENU twelve times Will switch the unit to normal operation Channel 2 Baud Rate If HART is Disabled the baud rate for Channel 2 will appear NOTE If HART is enabled the following channel two items will not appear Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 32 5 7 12 BAUD CHANNEL TWO Activating the MENU switch twelve times will display the default setting baud rate 8192 19200 Using the UP DOWN switches the Baud Rate can be selected for the Modbus communication interface The selectable B
31. settings The factory default register is read write This command can set all the settings to factory default by writing 1 A read returns 1 if the factory setting is set default or returns O if the settings are different than the factory default 7 7 43 COMM 1 CLEAR ERROR 2CH Writing 1 to this register clears all UART receive communication framing overrun parity error counters on serial channel 1 7 7 44 CLEAR STATS 1 20 Writing 1 to this register clears all Modbus function starting register address number of registers CRC error counters on serial channel 1 7 7 45 HART CURRENT Normally in HART mode the low current does not go below 3 5 mA In order for the current to distinguish between Fault and offline there is a HART setting that allows the current to go as low as 1 25 mA A read returns 1 0 Condition Normal HART Current HART Expanded Scale Units Table 25 HART Current Levels EXCEPTIONS If an illegal data value is entered must be between 0 1 then the Exception Code 03 Illegal Data Value is returned 7 7 46 HART PRESENT 2F HART present is a read only register A 1 indicates HART is installed A 0 means HART is not installed NOTE HART can be installed and not enabled but it cannot be enabled if not installed 7 7 47 EVENT LOGGING 30H The Observer H logs Alarm Fault Calibration and Maintenance events Each event group will store a total of 10 events
32. will return to normal operation without saving the changed settings Display 0 00 1 DTO2 0103 DT60 600 Sec Table 3 Delay Time Settings Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 23 5 7 4 SETTING CHECKING ALARM RELAY ENERGIZED DE ENERGIZED The Alarm Relay is normally de energized at power up of the unit The output is an open contact The output can be changed to closed contact at alarm by energizing the Alarm Relay Activate the MENU switch four times with the magnet stick The current Alarm Relay status will be displayed factory setting de energized Activating the DOWN switch will switch the Alarm Relay status to energized Activating the UP switch A will switch the Alarm Relay status back to de energized Activating the ENTER switch without changes made switches the unit back to Normal Operation Activating the ENTER switch with changes made will flash SAVE on the display Confirm the save action by activating the ENTER switch once more Activating the MENU switch while SAVE is flashing will discard the save and switch the unit back to Normal Operation If ENTER was activated the unit will display DONE to confirm that the changes have been saved and return to Normal Operation The operator can change the relay energizing settings and if desired move to the next item alarm latching ON OFF in the menu structure by ac
33. will switch the factory default ON FD ON Activating the UP switch A will switch the factory default OFF Activating the ENTER switch having changed the status ON OFF will flash SAVE on the display Confirm the SAVE action by activating the ENTER switch once more Activating the MENU switch while SAVE is flashing will discard the SAVE and switch the unit back to normal operation If ENTER is activated the unit will display DONE to confirm that the changes have been saved and return to normal operation The operator can change the Hazard settings and if desired move to the next item HART ON OFF in the menu structure by activating the MENU switch straight after the change The change will be saved at a later stage by Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 27 activating the ENTER switch at any point in the menu structure If no switch is activated for 60 seconds the detector will return to normal operation without saving the changed settings 5 7 8 HART ON OFF The Observer H provides the operator the ability to field configure the unit to either Enable Disable HART communication When HART communication is enabled the Observer H has the following Single Modbus HART When HART is disabled the Observer H supports Dual Modbus but no HART Activate the MENU switch eighth times with the magnet stick Factory default setting HTON will be displayed Activating the UP switch
34. 2 COMM 2 TOTAL RECEIVE ERRORS 62 1 099 RAD CRC ERRORS HE CZ BED oett ortam DOE Dp 62 1 1 54 CRC ERRORS EO SAME AS HI ue teft 62 1 55 COMM 2 PARIT WERRORS see ae ipsu pure eren a a sen bue eu MU UNUM C E E IRE 62 17 1 56 COMM 2 OVERRUN ERRORS 78H dn REM yR Rus rk uS ku RUN ON iat 62 T L COMM 2 FRAMING ERRORS itid odio n Fe es qur etia in ao aar vise Dus o ed Boi 63 7 1 58 COMM 2 TOTAL RECEIVE ERRORS SERO needa RUNE E a REN RR EHE EIS 63 71 99 MODBUS CAL ERROR BB iius eH OE UE DEED MM Md D DELI EE 63 7 1 60 CLEAR COMM 2 UART ERRORS 2 RE MAN EE uH 63 1 161 CEEARCOMM 2 MODBUS ERRORS iiti 63 7 1 62 INPUT 8 trier enaena ER MEE 63 CUSIOMER SUPPORT eC VERO an iu iaa 64 8 1 GENERAL MONITORS OFFICES 64 9 O APPENDIUX eds uade Ca AIRE BONA DCN UNDECIMA D du dux 65 9 1 WARRANTY 65 9 2 SPECIFICATIONS canne eiie 65 921 ELECTRICAL SPECIFICATIONS
35. 200 Using the UP DOWN switches the Baud Rate can be selected for the Modbus communication interface The selectable Baud Rates are 19200 9600 4800 or 2400 bits per second Activating the ENTER switch having changed the status ON OFF will flash SAVE on the display Confirm the SAVE action by activating the ENTER switch once more Activating the MENU switch while SAVE is flashing will discard the SAVE and switch the unit back to normal operation If ENTER is activated the unit will display DONE to confirm that the changes have been saved and return to normal operation The operator can change the Baud rate and if desired move to the next item Format in the menu structure by activating the MENU switch straight after the change The change will be saved at a later stage by activating the ENTER switch at any point in the menu structure More info for Modbus protocol is available in Section 7 If no switch is activated for 60 seconds the detector will return to normal operation without saving the changed settings Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 29 5 7 10 MODBUS SETTING FORMAT CHANNEL ONE Activating the MENU switch ten times will display the default Modbus setting Format F8N1 8 N 1 Using the UP DOWN switches the format can be selected for the Modbus communication interface The selectable formats are 8 N 1 8 E 1 8 O 1 or 8 N bits parity stop bits Ac
36. 4H Bra eR DE nu PERS EF URN n QUA nag eU M NM UR UM 53 1 11 36 RXD ERRORS 25H Kx uS crx USE E REM RANK ERE RR MR RA CERE EVANS 53 14 37 CRC ERRORS SAME AS 25H 26H aU EUR aer ia 53 7 38 COMM PARITY ERRORS 2 SERE UE Ur SNR Un 53 1 039 COMM E OVERRUN ERRORS 28H titii ipei p Ex SER discus ee 53 7 1 40 COMM 1 FRAMING ERRORS 2 an ESSE E PE uS EK Y US ERR NRUSEREMRNUERN ERRR UR RM E 53 7 7 41 COMM 1 TOTAL UART RECEIVE ERRORS 2 54 42 FACTORY DEFAULT 2BH E SH un GRE uk SE IM REM RR 54 T 43 COMM T CLEAR ERROR 2 GEH i ep D a Ee Db Re Fri Ren aM MM UM Eee LE ERE 54 11 44 CLEAR STATS 1120 cR 54 TAS HART CURRENT 2 54 7 1746 HART PRESENT arti eR 54 EVENT LOGGING BEED 54 1 048 USER DATA 60H 62 1 449 2 BUS ACTIVITY RATE 00719 Aa no od aetas 62 7 7 50 COMM 2 FUNCTION CODE ERRORS 12H de crues 62 7 1 51 COMM 2 STARTING ADDRESS ERRORS eal Ree eae 62 7 1 9
37. 5535 and then the counter rolls over to zero and begins counting again 7 7 54 RXD CRC ERRORS LO SAME AS HI 76EH NOTE Hi and Lo CRC errors are reported in the same word A read from either Hi or Lo will return the same count 7 7 55 COMM 2 PARITY ERRORS 77H A read indicates the number of Comm 2 Parity Flag Errors that occurred in the slave device The maximum count is 65535 and then the counter rolls over to zero and begins counting again 7 7 56 COMM 2 OVERRUN ERRORS 78H A read indicates the number of Comm 2 Only Overrun Errors that occurred in the slave device The maximum count is 65535 and then the counter rolls over to zero and begins counting again Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 62 NOTE An overrun error occurs when next received byte of data tries to overwrite an existing received data byte which has not been processed Therefore the next received byte of data is lost This can be controlled by implementing the proper DCS or PLC Error Handling Timing Setting ex Reply Timeout Setting Delay Time and Number of Retries and proper Baud Rate Setting 7 7 57 COMM 2 FRAMING ERRORS 79H A read indicates the number of Comm 2 Framing Errors that occurred in the slave device The maximum count is 65535 and then the counter rolls over to zero and begins counting again 7 7 58 COMM 2 TOTAL RECEIVE ERRORS 7 A read indicates the total Modbus Comm 2 Only Receive
38. CTION CODES SUPPORTED Function Code 03 or 04 Read Holding Registers is used to read status from the slave unit Function Code 06 Preset Single Register is used to write a command to the slave unit EXCEPTION RESPONSES AND EXCEPTION CODES In a normal exchange the master device sends a query to the Observer H The Observer H receives the query and returns a normal response to the master If a normal communications error occurs there are 4 possible responses from the Observer H If the Observer H does not recognize the query due to a communications error then no response is returned from the Observer H and the master device will eventually process a timeout condition for the query If the Observer H receives the query but detects a communication error CRC then no response is returned from the Observer H and the master device will eventually process a timeout condition for the query An exception code is returned when the Observer H receives the query without a communications error but cannot process it due to reading writing to a non existent or illegal Function Code Command Starting Address or Register Address or Data Value The exception response message has two fields that differentiate it from a normal response See the next section for more information Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 39 7 5 1 EXCEPTION RESPONSES Byte Modbus Range
39. Cycle Numeric Value 1 Time Not Flag Reset 0 Time Was Reset Event Index Event index of Numeric value Logged Event Warn Seconds Time Hi Numeric value 0 65535 Seconds Time Hi for warning event log entries Seconds Time Seconds Time Low Numeric value 0 65535 Low for warning event log entries Structure time Hi Hi byte year low Numeric value 0 65535 byte month for warning event log entries Address Parameter Function Data Data _ hex Structure time Hi byte day low value nnd 65535 Mid byte hour warning event log entries 3B otructure time Hi byte min low Numeric value 0 65535 Low byte sec for warning event log entries OO N oO oO C2 Reserved reis value Event E 28 Event E value NEN 65535 Warn Count Count Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 59 TH Parameter Function Data Data range Access Seconds Time Hi for alarm event log Numeric value 0 65535 Alarm entries Seconds Time Seconds Time Low Numeric value 0 65535 Alarm Low for alarm event log entries Structure time Hi Hi byte year low Numeric value 0 65535 Alarm byte month for alarm event log entries Structure time Hi byte day low Numeric value 0 65535 Alarm Mid byte hour alarm event log entries Structure time Hi byte min low Numeric value 0 65535 Alar
40. External Earth Terminal The protective earth ground terminal requires the use of an M5 ring lug and star washer The wire gauge should be less than or equal to the gauge of the power supply wires Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 12 Figure 7 Internal Earth Terminal 5 0 OPERATION AND SETUP 5 1 RECEIPT OF EQUIPMENT All equipment shipped by General Monitors is packaged in shock absorbing containers which provide considerable protection against physical damage The contents should be carefully removed and checked against the packing list If any damage has occurred or there is any discrepancy in the order please notify General Monitors as soon as possible All subsequent correspondence with General Monitors must specify the equipment part number and the serial number 5 2 NORMAL OPERATION Power up of the Gassonic Observer H The unit will perform an initialization of the micro controller internal tests and then goes into normal operation mode within a few seconds The output current will be 0 0 mA The display will show the software revision and test Normal The real time ultrasonic sound level will be shown on the display The corresponding 4 20 mA value will be set on the analog output Alarm The Alarm relay is a single pole double throw Error The Error relay is a single pole double throw It is normally energized Modbus The Modbus digital interface is ready to receive a c
41. HAZARDWATCH 19H ccccscssosssosssssssoessssssoscsscessscssucssucssuecsussesucsssssuesesecesesssesssessseesscssucssacerauessuessucssacesaverees 51 7 7 25 RELAY STATE LAH ccecsccssosssocscssccssccessossscsscsssessecsscssucesuessoscsosesrssersuessusssessucssasesosssseesaceesueessuesecesacesaesoes 52 7 7 26 ALARM LATCH 1BH cccccsccsesssesssesssesssossssscsssessscssscssucssuessussesessucsesessssceseessceessessseesecssucesacseaceesuessecesacesavesees 52 7 7 27 RELAY ENERGIZE 1CH cccccssssesssesssesssosssosssosessessssesscsssessscssucssscssusssssceseeesceesessecssecessessuesssesssnsesavesacesavesees 52 7 7 28 HART ENABLE 1DH cccccesssesssocssecssesssssssosssssssscssscssscssusssusssusssucssseseaccesecesccessessucssscssuessatssseersuessacesacesacerees 52 7729 HART TEST CLEA 52 7 7 30 CAL ABORT LFH MEM 53 7 7 31 COMM 1 TOTAL ILLEGAL NUMBER OF REGISTERS ERRORS 20H n 53 7 7 32 COMM 1 BUS ACTIVITY RATE 96 21H ccsccscsssossssesssesssucssuesssssssessusssescesscsscesssesssesssessucesarseacssucesaceraceeaceesees 53 7 7 33 COMM 1 FUNCTION CODE ERRORS 22H ccccsssescsesssossssssssessoesssssssccsssesssesssessscssecsasesssessucssacssacesaceeaceraess 53 7 7 34 COMM 1 STARTING ADDRESS ERRORS 23H cccsssssssssssssesssssssesssesssuesssccsssssssesscesseessesssesscesssesseeesecesecss 53 Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 4 T 7 35 COMM 1 TOTAL RECEIVE ERRORS 2
42. MESSAGE Range Referenced to Observer H Slave Address 1 247 Observer H ID Address Decimal Function Code 06 Preset Single Register Register Address 00 Not used by Observer H Hie Register Address 00 FF Hex Observer H Commands kk Lo Preset Data Hi 00 FF Hex Observer H Hi Byte Command Data Preset Data Lo 00 FF Hex Observer H Lo Byte Command Data CRC Lo 00 FF Hex CRC Lo Byte CRC Hi 00 FF Hex CRC Hi Byte Table 9 Modbus Write Query Message NOTE Address 0 is reserved for broadcast mode and is not be supported at this time NOTE Start Address can be a maximum of 247 Address Locations 0000 0x00F 7 Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 38 7 4 2 7 4 3 7 5 MODBUS WRITE RESPONSE MESSAGE Modbus Referenced to Observer H Slave Address 1 247 Observer H ID Address Decimal Function Code 06 Preset Single Register Register Address 00 Not used by Observer H Hi Register Address 00 FF Hex Observer H Commands Lo Preset Data Hi 00 FF Hex Observer H Hi Byte Command Data Preset Data Lo 00 FF Hex Observer H Lo Byte Command Data CRC Lo 00 FF Hex CRC Lo Byte CRC Hi 00 FF Hex CRC Hi Byte Table 10 Modbus Write Response Message NOTE Address 0 is reserved for broadcast mode and is not supported at this time NOTE Start Address can be a maximum of 247 Address Locations 0000 0x00F7 FUN
43. Ml 65535 uns byte month for event log entries Numeric value 0 65535 Structure time Hi byte day low Numeric value 0 65535 Maintenance Mid byte hour event log entries otructure time Hi byte min low Numeric value 0 65535 Maintenance Low byte sec for event log entries code Reserved Reserved Numeric value value Maintenance HL value c 65535 57 Seconds Time Hi Numeric value 0 65535 Calibrate Seconds Time Hi for event log entries Seconds Time Seconds Time Low Numeric value 0 65535 Calibrate Low for event log entries Structure time Hi Hi byte year low Numeric value 0 65535 Calibrate byte month for event log entries Hi byte day low Numeric value 0 65535 Calibrate byte hour event log entries Address Parameter Function Data Data land hex Structure time Hi byte min low Bell value 65535 Bami byte sec for event log entries Low Calibrate code a ea Numeric value ___ _ Calibrate NE Numeric value 0 65535 Calibrate Count Count Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 61 5A Structure time Mid Address hex Parameter Function Data Type e Data range Data range Access Reset Event Reset Event Numeric value Counters Counters Table 28 Event Logging Registry Table
44. See description word chars ASCII Ox000C Serial No Lo Unit serial number low word iar See description ics 0x000D Trigger Level Set view alarm trigger level See description Numeric iyu Alarm Delay Set view alarm delay time See description CH1 Address Set view channel 1 address 1 247 CH1 Baud Set view channel 1 baud rate oe 2 4 4 8 9 6 19 2 kbps Code Coe 0 1 2 3 ae channel 1 data 0 0011 CH1 Format format Code O T23 8N1 8E1 801 8N2 0x0012 CH2 Address Setviewchannel 2address channel 2 address 1 7 1 7 247 EA Baud 2 3 channel 2 RS 0x0014 CH2 Format format Code 0 1 2 3 8N1 8E1 801 8N2 0 0015 Rev software minor ASCII a revision chars 0 0016 Reset Alarms Set to clear all alarms Peu 0x0017 Cal Sub Mode Sure WE sepes Deluge See description Calibration Value 0x0018 Acoustic Test Initiates the acoustic test Numeric routine Value 0x0019 HazardWatch Enables HazardWatch flag rege Im Relay State Indicates the state of relays See description Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 41 Map 0x001B Alarm Latch Set clear alarm Teer state ie ows me 0x001C Relay Energize Set clear relay energize state Namere oog RW 0x001D HART Enable Enable HART on
45. Y LATCH NON LATCHED The alarm relay can be latched This is used to retain the alarm condition even if the gas leak goes away relay be reset the display magnets HART or Modbus The factory default setting is non latched 5 3 5 MODBUS Modbus is an optional serial information channel used to obtain control information The Observer H has dual Modbus Each one is configured separately The second Modbus can be changed to an optional HART Baud rate 2400 4800 9600 19200 Factory default is 19200 e Format Factory default is 8 1 e Address Factory default is Channel 1 Address 1 and Channel 2 Address 2 5 3 6 HART ENABLE e Selects whether channel 2 is Modbus or HART Factory default is if HART is installed HART is enabled amp current is normal 5 3 7 HAZARDWATCH HazardWatch is used when the Observer H is part of a HazardWatch Fire and Gas System manufactured by General Monitors Factory default is disabled Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 14 5 4 ACOUSTIC SELF TEST An acoustic self test named Senssonic is done every 15 minutes and takes approximately 8 seconds A test signal with a frequency sweep at constant amplitude is transmitted by the ultrasonic sound source to the microphone The detector analyzes the result of the sweep and stores the highest dB value This value is compared to a factory reference value and the result must be within a predefined
46. a maximum dimension of 63 mm is possible to mount the detector directly onto non vibrating structural beams or cable trays The microphone should face downwards and if tilting of the detector is necessary the angle of incline should not exceed 45 Avoid when mounting the detector within a half meter from a solid structure for example a wall or a big vessel to point the acoustic test sound source into the direction of this structure The sound source should be pointing into free space as far as possible 14 59 371 MOUNTING SCREW 12 99 M8 X 19 MAX 2X 330 1 N 346 30 AURENC 1 2 68 AN w 168 i 7 92 2 45 iud 591 1240 150 E Figure 4 Mounting Diagram Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 11 4 4 WIRING DIAGRAM 020 4 50 URC ESINE MO 01 Di 0 20 S0URCESINE DBSERVERH WD TER MIN AL ENERGEED RELAY MO 02 ioma BLOCK MO D2 Haus FAULT 2 Mo 02 DE ENERG ZED NORMALLY NORMALLY 1 NORMALLY NORMALLY CLOSED POWER SUPPLY zt VOC Figure 5 Wiring Diagram FAULT C Maus FAULT 1 REMOTE ALARM ALARM TE amp T MO MENTARY ALARM 2 RESET RELAY ALARM C O COM giv RETURN 4 5 PROTECTIVE EARTH GROUNDING Figure 6
47. aud Rates are 19200 9600 4800 or 2400 bits per second Activating the ENTER switch having changed the status ON OFF will flash SAVE on the display Confirm the SAVE action by activating the ENTER switch once more Activating the MENU switch while SAVE is flashing will discard the SAVE and switch the unit back to normal operation If ENTER is activated the unit will display DONE to confirm that the changes have been saved and return to normal operation The operator can change the Baud rate and if desired move to the next item Format in the menu structure by activating the MENU switch straight after the change The change will be saved at a later stage by activating the ENTER switch at any point in the menu structure More info for Modbus protocol is available in Section 7 If no switch is activated for 60 seconds the detector will return to normal operation without saving the changed settings B192 E E F8N1 gt 58 5 7 13 FORMAT CHANNEL TWO Activating the MENU switch thirteen times will Display the default setting Format F8N1 8 N 1 Using the UP DOWN switches the Format can be selected for the Modbus communication interface The selectable Formats are 9 1 8 E 1 8 O 1 or 8 N bits parity stop bits Activating the ENTER switch by changing the status ON OFF will flash SAVE on the display Confirm the SAVE action by activating the ENTER switch on
48. ce more Activating the MENU switch while SAVE is flashing will discard the SAVE and switch the unit back to normal operation If ENTER is activated the unit will display DONE to confirm that the changes have been saved and return to normal operation The operator can change the format settings and if desired move to the next item Address in the menu structure by activating the MENU switch straight after the change The change will be saved at a later stage by activating the ENTER switch at any point in the menu structure If no switch is activated for 60 seconds the detector will return to normal operation without saving the changed settings Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 33 f 1 SAVE Y y 8 Y 5 E Y n Y Y 5 7 14 ADDRESS CHANNEL TWO Active MENU switch Fourteen times will display the Channel 2 current Address of the Modbus Factory setting is 001 Activating UP switch will increment the address and activating DOWN switch will decrement the address the range is 1 to 247 Activating the ENTER switch having changes made will flash SAVE on the display Confirm the SAVE action by activating the ENTER switch once more Activating the MENU switch while SAVE is flashing will discard the SAVE and switch the unit back to normal operation If ENTER is a
49. channel 2 0x001E HART Test Test HART communication 0x0020 Ch1 UART Total number of UART Numeric 0 65535 Receive Errors channel 1 receive errors Value Ch1 Bus Numeric Ox0021 Bus te Serial Ch bus activity rate e dei 0x0022 Ch1 Function Number of Modbus channel 1 Numeric 0 65535 oxoo22 Errors function code errors Value Ch1 Starting 0x0023 Address Number of Modbus channel 1 Numeric 0 65535 E starting address errors Value rrors 0x0024 Ch1 Register Number of Modbus channel 1 Numeric 0 65535 Errors register errors Value Ch1 CRC Hi Number of Modbus channel 1 Numeric Ch1 CRC Lo Number of Modbus channel 1 Numeric 0x0027 Ch1 Parity Number of serial channel 1 Numeric 0 65535 Errors parity errors Value 0x0028 Ch1 Overrun Number of serial channel 1 Numeric 0 65535 Errors overrun errors Value 0x0029 Ch1 Framing Number of serial channel 1 Numeric 0 65535 Errors framing errors Value 0x002A Ch1 Modbus Total number of Modbus Numeric 0 65535 Receive Errors channel 1 receive errors Value 0x002B Factory Set factory defaults for alarm Numeric 1 R W Defaults and relay settings Value Clear Ch1 Clears UART total receive Numeric 0x002D Clear Ch1 Clears Modbus total receive Numeric R W Modbus Errors error counters Value Sets minimum analog output Numeric 0 3 5 mA current HART protocol 1 1 25 mA HART Present Indicates presence of HART Numeric 0 not present 0x002F Flag hardware
50. count is 65535 and then the counter rolls over to zero and begins counting again 1 7 39 COMM 1 OVERRUN ERRORS 28H A read indicates the number of Comm 1 Overrun Errors that occurred in the slave device The maximum count is 65535 and then the counter rolls over to zero and begins counting again NOTE An overrun error occurs when the next received byte of data tries to overwrite an existing received data byte which has not been processed Therefore the next received byte of data is lost This can be controlled by implementing the proper DCS or PLC Error Handling Timing Setting ex Reply Timeout Setting Delay Time and Number of Retries and proper Baud Rate Setting 1 7 40 COMM 1 FRAMING ERRORS 29H A read indicates the number of Comm 1 Framing Errors that occurred in the slave device The maximum count is 65535 and then the counter rolls over to zero and begins counting again Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 53 7 7 41 COMM 1 TOTAL UART RECEIVE ERRORS 2AH A read indicates the total Modbus Comm 1 Receive Errors that occurred in the slave device The maximum count is 65535 and then the counter rolls over to zero and begins counting again The total errors are an accumulation of the individual communication errors such as Overrun CRC Parity and Framing errors 7 7 42 FACTORY DEFAULT 2BH Writing 1 to this register will load the factory default values for alarm Modbus and HART
51. ctivated the unit will display DONE to confirm that the changes have been saved and return to Normal operation More info for Modbus protocol is available in Section 7 If no switch is activated for 60 seconds the detector will return to normal operation without saving the changed settings FS Activating the MENU fifteen times will switch unit to normal operation Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 34 6 0 GAIN TEST AND CALIBRATION 6 1 6 2 Calibration of the Gassonic Observer H is only needed when the unit is more than 3 dB out of tolerance This can be verified by doing an Observer H Gain Test on the unit The Observer H Gain Test is one of the test sequences of the Gassonic 1701 Calibration is performed with a calibrated Gassonic 1701 GAIN TEST the Gassonic 1701 into Observer H Gain Test see Gassonic 1701 User Manual for details Turn the Gassonic 1701 onto the Gassonic Observer H and activate the Gain Test by pressing the ENTER or TEST button The Gassonic 1701 will output a constant sound pressure level of 99dB for 8 seconds and then to OdB for 3 seconds Thereafter the sound pressure level will return to 99dB and the sequence will be repeated until a new sound pressure level is selected or the test stopped To select a new sound pressure level the DOWN button should be pressed There are four levels 99dB 89dB 79dB and 64dB The dB readout o
52. ed EXCEPTIONS an illegal data value is entered must be between 0 1 then the Exception Code 03 Illegal Data Value is returned If the Observer H hears a gas leak greater than the trigger when the command is received a Code 06 device busy exception will be returned 7 7 28 HART ENABLE 1DH The HART enable register read write This command enables or disables HART A 0 is HART disabled A 1 is HART Enabled This is an option that must be ordered EXCEPTIONS an illegal data value is entered must be between 0 1 or if HART is not installed then the Exception Code 03 Illegal Data Value is returned 7 7 29 HART TEST 1EH This command is used to test the HART output It produces constant zeros or constant ones on the HART output This is only available if the HART option was purchased EXCEPTIONS an illegal data value is entered must be between 0 1 or if HART is not installed then the Exception Code 03 Illegal Data Value is returned Results Normal Constant zeros Constant ones Table 24 HART Codes Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 52 7 7 30 CAL ABORT Writing to calibrate abort register will abort calibration and return Observer H to normal 7 7 31 COMM 1 TOTAL ILLEGAL NUMBER OF REGISTERS ERRORS 20H A read indicates the total illegal number of registers errors on the Comm 1Modbus The maximum co
53. ed in the unit Maintenance Running Time in Seconds Hi Word 0x4F This register reads the high word of the running time in seconds when the gas check event occurred This time is in seconds since January 1 2000 Maintenance Running Time in Seconds Low Word 0x50 This register reads the low word of the running time in seconds when the gas check event occurred This time is in seconds since January 1 2000 Maintenance Clock Time Year Month 0x51 These registers are described in Table 28 as item number 1 Maintenance Clock Time Day Hour 0x52 These registers are described in Table 28 as item number 2 Maintenance Clock Time Minute Seconds 0x53 These registers are described in Table 28 as item number 3 Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 57 Maintenance Cause 0x54 There are three maintenance event types 1 User started acoustic test code 9 2 Alarm test code 8 3 Piezo calibration code 4 Spare 0x55 opare register Total Maintenance Event Counter 0x56 This reads the total number of gas check events that have been stored in the unit Calibration Running Time in Seconds Hi Word 0x57 This register reads the high word of the running time in seconds when the calibration event occurred This time is in seconds since January 1 2000 Calibration Running Time in Seconds Low Word 0x58 This register reads the low word of the running time in seconds w
54. ed in this manner If an improper bit or the action is not allowed at this time an exception will be returned Alarm Test The alarm bit is a toggle The first write sets the mode the second write clears the mode e Acoustic Test This mode will perform non continuous acoustic test The acoustic test will not be allowed if a gas leak is above the trigger level instead an exception will be returned The display will show a COM e Calibrate This will put the Observer H into calibration mode It will be ready for the 1701 to be activated Calibration will not be allowed if a gas leak is above the trigger level instead an exception will be returned Operational Mode Writing an operational mode bit will abort any of the above modes It will not go back to operational mode until it is safe 7 73 PRIMARY FAULT STATUS ERROR 1 02H A read returns the errors that are occurring which are indicated by bit position This status word is used as the primary status error word This is the only one that needs to be read to know if there are any errors Bit Position LES 14 13 Fault Error Not BELOW Not Event Hart User Critical Description Lower Used ATREF Used Memory Memory Memory Memory level Hex Value Ox8000 0 4000 0x2000 0x100 0x0800 0x0400 0 0200 0 0100 0 Decimal 32768 16384 8192 4096 2048 1024 512 256 Value Display N A EEVT EHRT EUSR ECRT Fault Code Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev
55. en the Exception Code 03 Illegal Data Value is returned NOTE The default Address is 1 Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 48 7 7 15 COMM 1 BAUD RATE 10H A read returns the Comm 1 baud rate of the Observer H A write changes the baud rate to the requested baud rate After the baud rate has been changed to the addressed unit the Modbus communications will cease because the baud rate has changed therefore the master will have to change its baud rate to the slave s new baud rate in order to restart the communications Baud Rate Low Data Byte Access 19 2K 04 Read Write 9600 Read Write 4800 Read Write 2400 Read Write Table 18 Comm 1 Baud Rate This function is indicated on the Low Data Byte the High Data Byte is not used EXCEPTION If an illegal data value is entered which is not listed above then the Exception Code 03 Illegal Data Value is returned NOTE The default baud rate is 19200 7 7 16 COMM 1 DATA FORMAT 11H A read returns the Comm 1 data format of the Observer H A write changes the data format to the requested data format After the data format has been changed to the addressed unit the Modbus communications may cease or start producing Comm errors because the data format has changed therefore the master will have to change its data format to the slave s new data format in order to restart or provide proper communications Data Parity Stop Format
56. eplace the O ring if damaged Send the unit to GM Service Repair for repair if the flame path is damaged NOTE The ambient temperature is limited to 40 C to 60 C The performance of the Gassonic Observer H Ultrasonic Gas Leak Detector as a safety device per clause 1 5 of Annex ll of the ATEX Directive 94 9 EC is not covered by this certificate 4 2 1 SPECIFIC CONDITIONS OF USE e he Class A2 70 M6x1x20 screws connecting the bulkhead flange joints must be tightened to 9 Nm using a torque wrench e For Division 1 installations the piezo source contains aluminum and is considered to present a potential risk of ignition by impact or friction Care must be taken into account during installations and use to prevent impact or friction e Consult the manufacturer if dimensional information on the flameproof joints is necessary WARNING The inner six screws should not be unscrewed and bottom chamber should not opened The warranty will be void if the bottom chamber is opened 4 3 MOUNTING Two 8 stainless steel bolts not supplied 88mm apart attached to the top of the detector are used to fix the Gassonic Observer H in its operating position These bolts may penetrate the detector top by a maximum of 14 mm The detector can be mounted to a freestanding pole or wall using the Gassonic mounting bracket 80601 1 This bracket is an optional accessory and is supplied with two M8 mounting U bolts which can fit around a pole with
57. er the analog output Thus a user can use an existing three wire cable and obtain control information without rewiring One Modbus is always present The second Modbus is also present but maybe overridden by an optional HART e Alarm relay e The Alarm relay is controlled by an adjustable trigger level in 5 dB steps from 59 to 99 dB and has an adjustable internal alarm delay from 0 to 600 seconds It is necessary to introduce alarm delay of at least 10 seconds either internally or in the control system Factory setting 79 dB and 10 seconds delay Error relay e The error relay is normally energized and de energized for error Sink The detector receives a current loop Source The detector sends out a current loop INSTALLATION MECHANICAL CONSTRUCTION The Gassonic Observer H consists of two chambers Both chambers are certified as flameproof Ex d and Explosionproof XP The cables are connected through M20 x 1 5 6H cable entries in the top chamber using approved Ex d glands or approved conduit with seal installed within 18 of the detector The inner cores of the cable penetrating the detector should be at least 25 cm long This will ensure no tension on the wires and connector PCB when the top chamber is opened The two mounting bolts are on the top chamber of the detector and this means that the cables will enter on the fixed part of the detector The bottom part is attached to the top by means of six Allen screws with lock was
58. f desired move to the next item Factory Default ON OFF in the menu structure by activating the MENU switch straight after the change The change will be saved at a later stage by activating the ENTER switch at any point in the menu structure If no switch is activated for 60 seconds the detector will return to normal operation without saving the changed settings Reset a Latched Relay Activating an UP DOWN or Enter magnet will reset a latched relay The relay will not reset if an alarm condition is still present Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 25 aa DONE 4 gt 58 5 7 6 SETTING CHECKING FACTORY DEFAULT ON OFF The Factory Default command gives the local operator the opportunity to return all settings to factory default Activate the MENU switch six times with the magnet stick Factory Default OFF FDOF will be displayed Activating the DOWN switch will switch the Factory Default ON Activating the UP switch A will switch the Factory Default OFF Activating the ENTER switch without changing the status to ON switches the unit back to Normal Operation Activating the ENTER switch having changed the status to ON will flash SAVE on the display Confirm the save action by activating the ENTER switch once more Activating the MENU switch while SAVE is flashing will discard the save and switch the unit back to Normal Operati
59. he output method suited for their use RELAY RATINGS 8A 250 VAC graph in section 1 0 DC ratings ALARM RELAY OUTPUT When using this method an internal trigger level and delay time must be set The trigger level should be at least 6 dB higher than the background noise The trigger level can be set in steps of 5 dB from 59 dB to 99 dB and the factory setting is 79 dB An alarm delay time is implemented to eliminate spurious alarms due to short background noise peaks This delay time can be set internally from 0 to 600 seconds The factory setting is set to 01 10 seconds The delay can alternatively be set in the Fire and Gas Panel When a gas leak occurs in the detector s coverage area the trigger level will be reached the LED in optical link window will be illuminated and the alarm relay timer will be started When the delay times out the unit will go into alarm mode which will result in the following The dB value preceded by will flash on the display e The alarm relay will activate e An event will be recorded 4 20MA OUTPUT The 4 20 mA output is factory and field configurable to either Source or Sink current At normal operation the output will be between 4 and 20 mA When using this output method a trigger level at least 6 dB higher than the background noise and an alarm delay time 10 seconds should be set in the fire amp gas system The output value in mA corresponding to the sou
60. he recommended wire sizes are shown below AWG m FEET METERS 15000 9434 2880 5928 1809 1136 0 823 0 519 Table 32 24 VDC Cable Lengths Use the following formula to calculate the wire size Cable drop per wire equals Ein voltage at instrument 2 24 15 2 4 5 volts per wire Resistance maximum equals cable drop divided by Current required by unit at voltage at unit R 4 5 0 300 15 ohms per cable Ohms per cable divided by cable ohms per meter 15 3 28 4573 meters 10 AWG European Union EU Approved Applications PSU noise and ripple voltage 1 0 Vpp max The customer supplied PSU must comply with IEC 61010 1 limiting current to 8 A under fault conditions in order to comply with the CE Marking requirements Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 66 9 2 2 APPROVALS CSA FM Class 1 2 Groups B C and D Class 11 111 Div 1 2 Groups E Tamb 40 C to 60 C Type 4X Ex d ia T6 Gb Ex tb T85 C Db Tamb 40 C to 60 C IP66 Functional Safety SIL 3 suitable per IEC 61508 HART Registered Approved by the HART Communication Foundation Compatible with Emerson 375 Field Communicator e listed in Emerson Process Management s Aware device list EMI EMC EN 61000 6 2 EN 61000 6 4 9 3 SPARE PARTS AND ACCESSORIES To order spare parts and or accessories please contact the nearest General Monitors
61. hen the calibration event occurred This time is in seconds since January 1 2000 Calibration Clock Time Year Month 0x59 These registers are described in Table 28 as item number 1 Calibration Clock Time Day Hour 0x5A These registers are described in Table 28 as item number 2 Calibration Clock Time Minute Seconds 0x5B These registers are described in Table 28 as item number 3 Calibration Code 0x5C This returns 1 for zero events and 2 for calibration events Spare 0x5D opare register Total Calibration Event Counter 0x5E This reads the total number of calibration events that have been stored in the unit Clear all events 0x5F Writing zero 0 to this register clears all event counters Setting Clock Please see the table on the following page Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 58 Address hex Parameter Function Data Type E Access Seconds Time Hi Seconds Time Hi 0 65535 Seconds Time Seconds Time Numeric value 0 65535 Timer sec Low Real Time Clock Read Set year and 2 Numeric 0 99 year 1 Timer Struct Year Month month of RTC Values 12 month Real Time Clock Read Set day and 2 Numeric 1 31 day 0 Day Hour hour of RTC Values 23 hour 2 Numeric 0 59 minute Timer Struct Values 0 59 second Real Time Clock Read Set minutes Minute Second and seconds of RIC C2 PowerCycleFlag Read Power
62. hers Unscrewing these screws will expose the connector PCB in the top chamber These screws will be fixed by retaining washers to the bottom part The bottom part of the detector is supported by the Load strap which is connected to the top The bottom chamber contains integral associated intrinsically safe apparatus limiting energy to an intrinsically safe microphone and piezo source mounted to the exterior of the enclosure Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 9 TOP HOUSING THE FIXED PART OF THE DETECTOR M20X1 5 CABLE ENTRY 6H M5 EARTH CONNECTION FLAME PATH LOAD STRAP RELAY BOARD BULKHEAD SEPARATE THE2 CHAMBERS AND PERMANENTLY ATTACHED TO THE BOTTOM CHAMBER IS GROUND e gt M6 ALLEN SCREW AND LOCK WASHER 6X MUST BE TIGHTENED WITH 9Nm TORQUE Wire Lengths inside the Top Chamber 250 9 84 10 394 NE Figure 2 Mechanical Construction Internal m I MN f USER INTERFACE SWITCHES OPERATED 5 OPTICAL LINK WINDOW TEST SOUND SOURCE MICROPHONE Figure 3 Mechanical Construction External Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 10 4 2 MECHANICAL OPERATION AND SAFETY When closing the top chamber ensure that the Load strap and wires are not caught between the bulkhead and the top part of the detector Check the status of the O ring and the flame path R
63. ide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 35 Display Cal Req Hold ENTER for 3 sec Go to operational Set Current run HART Enable Current 3 5mA Hart Disable Current 3mA Return exception ue Flashing Enter released Yes No time out Start 5 sec timer a4 10 Time up di Flashing 71701 Start timer Yes 1 S No Tes 2 seconds No 15 59 84 99db seconds seconds Set Flag For HART amp Modbus Figure 9 Calibration Routine Yes Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 36 7 0 MODBUS DIGITAL INTERFACE The Observer H is available in a Dual Modbus configuration and in a Single Modbus HART configuration For the Dual Modbus configuration two independent Modbus communication channels are provided and referred to as Comm 1 and Comm 2 For the Single Modbus HART configuration the Modbus channel is referred to as Comm 1 NOTE The Dual Modbus configuration disables HART communication 7 1 BAUD RATE The Baud Rate is a selectable setting via the Modbus communications interface The selectable baud rates are 19 2K 9600 4800 or 2400 bits per second 7 2 DATA FORMAT The Data Format is a selectable setting via the Modbus communications interface The selectable data formats are as follows Data Bits Stop Bit Tab
64. ill return to normal operation 5 7 2 SETTING CHECKING TRIGGER LEVEL The trigger level can be set from 59 to 99 dB in steps of 5 dB The ALARM RELAY will activate at this trigger level changing from open contact to closed factory default Activate the MENU switch twice with the magnet stick The current trigger level will be displayed factory setting 79 dB Activating the UP switch A will increment the trigger level by 5 dB Activating the DOWN switch will decrement the Trigger Level in 5 dB increments Activating the ENTER switch without changes made switches the unit back to Normal Operation Activating the ENTER switch with changes made will flash SAVE on the display Confirm the save action by activating the ENTER switch once more Activating the MENU switch while is flashing will discard the save and switch the unit back to Normal Operation ENTER was activated the unit will display DONE to confirm that the changes have been saved and return to Normal Operation The operator can change the trigger level and if desired move to the next item delay time in the menu structure by activating the MENU switch straight after the change The change will be saved at a later stage by activating the ENTER switch at any point in the menu structure If no switch is activated for 60 seconds the detector will return to normal operation without saving the changed settings Installation and User Guide for Gass
65. in a first in first out manner An identifying number and time stamp is also stored for each event Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 54 Faults Whenever the fault word changes the time will be recorded See Primary fault The time of the fault will be saved When the fault is removed it is not saved and the counter is not incremented A fault event is logged for every 30 seconds recorded Alarm The time the gas level reaches the Alarm level is recorded Each time this happens a counter is incremented The end the event 15 when the sound level goes 5 below the alarm level Calibration Microphone Calibration When a calibration is finished a counter is incremented for each calibration attempt The identifying number stored depends on the ending condition Condition Identifying number Calibrate OK Calibrate Adjust Calibrate Error 006 Table 26 Calibration Counter Maintenance There are a total of 10 maintenance events stored The number stored with the time stamp will indicate the source of the maintenance event Piezo When a Piezo calibration seven up seven times on the UP is saved a maintenance event will occur The value stored will be 4 A factory piezo calibration will have the number 9 Alarm Test When an alarm test is initiated a maintenance event will occur The event code will be 6 Running Time in Seconds Hi Word 0x30 Th
66. is sets reads hi word of device running time in seconds This value must be read written prior to running time low byte register 0x00B2 Running Time in Seconds Lo Word 0x31 This sets reads hi word of device running time in seconds This value must be read written after running time hi byte register 0x00B1 Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 55 Item Number Description Hi Byte Year Low Byte Month Hi Byte Day Low Byte Hour Hi Byte lt Minute Low Byte lt Second Table 27 Real Time Clock Time Format Real time Clock Year Month 0x32 This is used to read write the real time clock The high byte will be the year minus 2000 The low byte will be a value from 1 to 12 To get or set real time read or write year month 0x00B3 first then day hour 0x00B4 then min sec 0x00B5 Real time Clock Day Hour 0x33 This is used to read write the real time clock The high byte will be the day of the month from 1 to 31 The low byte will be the hour from O to 23 To get or set real time read or write year month 0x00B3 first then day hour 0x00B4 then min sec 0 0085 Real time Clock Minute Second 0x34 This is used to read write the real time clock The high byte will be the minute from 0 to 59 and the low byte will be the seconds from O to 59 To get or set real time read or write year month 0x00B3 first then day hour 0 0084 then min sec 0x00B5
67. isters are described in Table 28 as item number 1 Alarm Clock Time Day Hour 0x42 Alarm Structure Mid These registers are described in Table 28 as item number 2 Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 56 Alarm Clock Time Minute Seconds 0x43 Alarm Structure Low These registers are described in Table 28 as item number 3 Spare 0x44 45 Spare register Total Alarm Event Counter 0x46 This reads the total number of alarm events that have been stored in the unit Fault Running Time in Seconds Hi Word 0x47 This register reads the high word of the running time in seconds when the fault event occurred This time is in seconds since January 1 2000 Fault Running Time in Seconds Low Word 0x48 This register reads the low word of the running time in seconds when the fault event occurred This time is in seconds since January 1 2000 Fault Clock Time Year Month 0x49 Fault Structure Hi These registers are described in Table 28 as item number 1 Fault Clock Time Day Hour 0x4A Fault Structure Mid These registers are described in Table 28 as item number 2 Fault Clock Time Minute Seconds 0x4B Fault Structure Low These registers are described in Table 28 as item number 3 Fault Code 0x4C Fault Cause This register is described in Table 28 Spare 0x4D Spare register Total Fault Event Counter 0 4 This reads the total number of fault events that have been stor
68. le 6 Data Format 4 3 MODBUS READ STATUS PROTOCOL QUERY RESPONSE 7 3 1 MODBUS READ QUERY MESSAGE Modbus Range Referenced to Observer H Slave 1 247 Observer H ID Address Address X 0 or 1 Model Function Read Holding Registers Code Starting 00 Not Used by Observer H Address Hi Starting 00 FF Hex Observer H Commands Address Lo No of 00 Not Used by Observer H Registers Hi No of 01 No of 16 Bit Registers Registers Lo CRC Lo 00 FF Hex CRC Lo Byte 7 8 CRC Hi 00 FF Hex CRC Hi Byte Table 7 Modbus Query Messages NOTE Address 0 is reserved for broadcast mode and is not be supported at this time NOTE Start Address can be a maximum of 247 Address Locations 0000 0x00F 7 Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 37 7 3 2 MODBUS READ RESPONSE MESSAGE Byte Modbus Range Referenced to Observer H i Observer H ID Address 1 Slave A 1 247 Decimal Function 03 or 04 Read Holding Registers Code Byte Count 02 FF Hex No of Data Bytes 4 Data Hi 00 FF Hex Observer H Hi Byte Status Data 5 Data Lo 00 FF Hex Observer H Lo Byte Status Data 6 CRC Lo 00 FF Hex CRC Lo Byte 7 CRC Hi 00 FF Hex CRC Hi Byte Table 8 Modbus Read Response Messages NOTE Address 0 is reserved for broadcast mode and will not be supported at this time 7 4 MODBUS WRITE COMMAND PROTOCOL QUERY RESPONSE 7 4 1 MODBUS WRITE QUERY
69. ly Tighten the two M4 screws Perform a Piezo Calibration Seven up tap the magnet 7 times on the UP arrow and a Forced Acoustic Test Section 5 6 1 Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 68 TWO PINS CONNECTOR O RING M4 SCREW 2X Figure 11 Sound Source Assembly Replacement Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 69
70. m Low byte sec for alarm event log entries Reserved Reserved Numeric value Reserved Reserved Numeric value Alarm Event Alarm Event Count Numeric value EUN 65535 Count Fault Seconds Time Hi Numeric value 0 65535 Seconds time Hi ial log entries Seconds time Seconds Time Low Numeric value 0 65535 Low for fault event log entries Structure time Hi Hi byte year low Numeric value 0 65535 byte month for fault event log entries Address Parameter Function Data ML Data Structure time Hi byte day low value 65535 Mid byte hour alarm event log entries Hi byte min low Numeric value 0 65535 byte sec for fault event log entries Fault code Fault code Same Numeric value 0 65535 code as register 2 Reserved Reserved Numeric value value ae aren Fault Event Count Fault Event iN eee m 65535 m Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 60 Alarm Seconds Time Hi K K NO K gt e 2 x o t K j 3 X 4B Structure time Low Address hex Parameter Function Data BEIERE ULI Access Maintenance Seconds Time Hi for event log entries Maintenance Seconds time Hi Seconds time Seconds Time Low value 65535 Low for event log eme Structure time Hi Hi byte year low Numeric value
71. meric Ch2 CRC Lo Number of Modbus channel 2 Numeric 0x0077 Ch2 Parity Number of serial channel 2 Numeric 0 65535 Errors parity errors Value 0x0078 Ch2 Overrun Number of serial channel 2 Numeric 0 65535 Errors overrun errors Value 0x0079 Ch2 Framing Number of serial channel 2 Numeric 0 65535 Errors framing errors Value Ch2 Modbus Total number of Modbus Numeric Value Clear Ch1 Clears UART total receive Numeric Clear Ch1 Clears Modbus total receive Numeric Ox007E Reserved N A R Value Table 13 Modbus Commands 7 7 OBSERVER H COMMAND REGISTER DETAILS 7 7 1 ANALOG OOH A read returns a value which is proportional to the 0 20 mA output current The current is based on a 16 bit value The number represents the current in microamps uA 7 7 2 MODE 01H A read returns the Observer H status mode Bit Position 5 14 13 2 1 t 1 1 11 Description Used Used Used Used Rev Mode 5 7 3 Pending 8 C Hex Value 0x0100 25 0 6 5 4 2 1 12 Bit Position 1 un 252028 6 Description Test Used Mode Mode Mode Test Mode Mode Hex Value 0 0001 pe js Jp s d 0 Lom Table 14 Operation Status Mode READ A read request to this register returns the present Observer H operating mode represented by the enabled bit Descriptions of the modes are provided below Startup Observer H initialization during the power up cycle
72. n the display of the Gassonic 1701 can now be compared with that of the Observer H CALIBRATION the Gassonic 1701 into Observer H Gain Test see Gassonic 1701 User Manual for details Set the Gassonic Observer H into Calibration mode by holding the magnet stick on the ENTER switch for more than 3 seconds The Observer H will display a flashing CAL Verify the need for calibration by activating the ENTER switch one more time The Observer H will now display a flashing 1701 This indicates that the Gassonic Observer H is ready for calibration and is awaiting communication from the Gassonic 1701 unit HOLD FOR MORE THAN 3 SECONDS Y E 58 E 8 CAL B 1701 E A Y VV VE 2 Turn Gassonic 1701 onto Gassonic Observer H and activate the calibration by pressing ENTER or TEST button The calibration sequence is automatic If communication between the Gassonic Observer H and the Gassonic 1701 is broken EER will be displayed and the unit will return to normal operation If the calibration sequence was completed successfully and adjustments were made ADJ will be displayed for 2 seconds and the unit will return to normal operation If the calibration sequence was completed successfully and adjustments were not necessary OK will be displayed for 2 seconds and the unit will return to normal operation A calibration event will be recorded Installation and User Gu
73. nd pressure in dB can be calculated by the following formula 58 16 46 4 x The transposed formula 4 46 16 58 n Sound Level in dB X Output value in mA The 0 to 20 mA output is a current signal that corresponds to the following signals Current Special START UP 3 5 0 2 mA 1 25 0 2 mA Condition FAULT 35 0 2 1 25 0 2 mA ACOUSTIC ERROR 3 5 0 2 mA 1 25 0 2 mA Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 16 Modbus HART HART Current Normal Special Table 1 Analog Output Levels Condition See acoustic self test sequence in Section 5 4 When HART is selected the output current changes to comply with the HART Foundation requirements The HART Foundation does not specify current below 3 5 mA In normal HART mode the actual current does not go below 3 5 mA Modbus reports the analog output as if HART was not there This allows users to use a constant Modbus program When the alarm relay is latched but the current and display follows the present DB The relay will return to normal after the relay reset is activated via Modbus HART or remote switch The unit will have an Inhibit output when Setup Calibrate or acoustic test is activated This activation can take place via display magnets HART or Modbus 1 Source The detector sends out a current loop 2 Sink The detector receives a cu
74. of the equipment supplied by General Monitors The customer will assume all liability for the misuse of this equipment by its employees or other personnel All warranties are contingent upon proper use in the application for which the product was intended and does not cover products which have been modified or repaired without General Monitors approval or which have been subjected to neglect accident improper installation or application or on which the original identification marks have been removed or altered Except for the express warranty stated above General Monitors disclaims all warranties with regard to the products sold including all implied warranties of merchantability and fitness and the express warranties stated herein are in lieu of all obligations or liabilities on the part of General Monitors for damages including but not limited to consequential damages arising out of or in connection with the performance of the product 9 2 SPECIFICATIONS 9 2 1 ELECTRICAL SPECIFICATIONS Cable Requirements 3 wire shielded cable Maximum distance between Observer H and power source Q 24 VDC nominal with alarm relay energized and 20 mA source Voltage Normal Peak Alarm Table 30 Current vs Input Voltage Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 65 AWG mm Ohms per Km Ohms k feet Table 31 Resistance of Copper Wire Based on a 24 volt supply and 15 volts at the Observer H t
75. ommand Test The acoustic Self test is done at regular intervals 5 3 SETUP The setup can be done in three ways The display magnet is a user input that only requires a magnet as an external tool It is best used in simple systems HART is a method that requires a HART modem Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 13 and supporting software It is best used where there is existing wiring and control information is desired Modbus requires a separate pair of wires and a RS 485 to PLC converter It is best used for large systems 5 3 1 TRIGGER LEVEL The trigger level should be at least 6 dB higher than the background noise The Alarm relay is controlled by an adjustable trigger level in 5 dB steps from 59 to 99 The factory default setting is 79 dB 5 3 2 TIME DELAY An alarm delay time is implemented to eliminate spurious alarms due to short background noise peaks This delay time can be set internally from 0 to 600 seconds The factory default setting is set to 01 10 seconds 5 3 3 ALARM RELAY ENERGIZED DE ENERGIZED The alarm relay can be normally energized or normally de energized In either energized state the single pole double throw allows for opening or closing a contact for an alarm The normally energized state is a failsafe method If an alarm or power outage occurs an alarm condition will be indicated The factory default setting is normally de energized 5 3 4 ALARM RELA
76. on If ENTER was activated the unit will display DONE to confirm that all settings have been returned to the Factory Default and return to Normal Operation Activating the MENU switch a 12th time will switch the unit to Normal Operation if any changes were made in previous menu items HazardWatch Mode ON OFF the unit will flash SAVE on the display Confirm the save by activating the ENTER switch or discard the save by activating the MENU switch once more no switch is activated for 60 seconds the detector will return to normal operation without saving the changed settings The Observer H factory default settings are as follows Feature Setting Table 4 Dual Modbus Configuration Default Settings Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 26 Feature Setting Alarm Relay Energized De Energized De Energized Alarm Relay Latched Un Latched Un Latched HART Enable Enabled HART Current 3 5 mA for High Range 1 25 mA for Low Range Table 5 Single Modbus HART Configuration Default Settings NOTE There are three other ways to restore the default values Both Modbus and HART can send a command The alarm reset switch can restore the default values See remote reset switch 5 7 7 SWITCHING HAZARDWATCH MODE ON OFF Activate the MENU switch seven times with magnet stick Factory default setting HZOF will be displayed Activating the DOWN switch
77. onic Observer H MANOBSERVER H Rev C 3 12 Page 22 5 7 3 SETTING CHECKING DELAY TIME The delay time is linked to the ALARM RELAY The delay time can be set from 0 to 600 seconds If the relay output is being used for executive action it is of utmost importance that the delay time is of a sufficient length to eliminate spurious alarms Activate the MENU switch three times with the magnet stick The current delay time will be displayed factory setting DTO1 01 10 sec Activating the UP switch will increment the delay time by 10 sec Activating the DOWN switch will decrement the delay time by 10 sec Activating the ENTER switch without changes made switches the unit back to Normal Operation Activating the ENTER switch with changes made will flash SAVE on the display Confirm the save action by activating the ENTER switch once more Activating the MENU switch while is flashing will discard the save and switch the unit back to Normal Operation If ENTER was activated the unit will display DONE to confirm that the changes have been saved and return to Normal Operation The operator can change the delay time and if desired move to the next item alarm relay energized de energized in the menu structure by activating the MENU switch straight after the change The change will be saved at a later stage by activating the ENTER switch at any point in the menu structure If no switch is activated for 60 seconds the detector
78. r HIGH NOISE AREAS Typical areas Turbo compressor areas Complete open offshore weather deck Next to very noisy machinery LOW NOISE AREAS Typical areas Areas with no machinery Areas with low frequency machine made noise VERY LOW NOISE AREAS Typical areas Onshore wellhead areas in calm environment Salt dome gas storage facilities in calm environment Figure 1 Detector Coverage Characteristics 3 1 AREA MONITORED BY THE GASSONIC OBSERVER H The detection coverage of the Gassonic Observer H is determined by the ultrasonic noise levels in the area of installation Experience has shown that most process environments can be divided into three overall noise levels This is illustrated in the image above The detection coverage characteristics are based on live tests and show the minimum coverage of the Gassonic Observer H detector in areas without solid physical obstructions between the detector and the leak For further instructions on installation Gassonic A S can be consulted Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 3 2 4 0 4 1 DETECTOR OUTPUTS The Gassonic Observer H detector has several output methods e Analog 4 20 mA interface Sink or Source Factory setting Source e Digital outputs are Modbus or optional HART e Modbus provides control information in a RS485 physical layer and a Modbus protocol HART optional is digital information ov
79. rrent loop 5 6 4 ERROR FAULT OUTPUT Error fault conditions are indicated in many ways On the User Interface display Through the 4 20 mA analog output The Error Fault relay will de energize The HART digital information will show an error The Modbus digital information will show an error A fault event will be recorded every 30 seconds Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 17 Gas Error Fault Display AO Modbus Error relay User action overrides Low supply De energized Yes De energized Error piezo to microphone Remote alarm switch 0 mA De energized Check switch wiring Yes stuck Remote relay reset switch 0 mA De energized Check switch wiring Yes stuck Magnetic Sensors EMAG 0 mA 0 mA De energized Remove magnet Yes stuck EINV 0 mA De energized Return to factory voltage error Critical 2 De energized Return to factory memory error User memory EUSR 0 mA 0 mA De energized Recycle power and error restore user defaults HART Recycle power and EHRT 0 mA 0 mA De energized restore HART information ina EEVT OmA OmA De energized Recycle power event No memory error data maybe accurate Table 2 Error Fault Indications See acoustic self test sequence in Section 5 4 See HART output current in Table 2 Low Supply This fault occurs if the supply voltage at the Observer H
80. sccssscsssosscossscssscssssesssocssscesssssosssosssesssosesosssesesesesrsuersessseesacssaesosestacesacesatsees 48 7 7 15 COMM 1 BAUD RATE csssesssesssosssosssoscssscssesssucsssessscssucssucsssesesccesseesesssessucsnscsaerssessutssucesauessacesaverees 49 7 7 16 COMM 1 DATA FORMAT 14H cccccccssosssosssossssecsesessscssesssssssucssucssusssuscesecsssssusseuserseesscerssesssessacesacersneeravesees 49 7 7 17 COMM 2 ADDRESS 12H k cccsscsssesssesssosssosssssesscsssessucsssessucssuessucssuessecsesecsacsrassesesssceraessuessacssucssueesaresaeerees 49 7 7 18 COMM 2 BAUD RATE 13H ccsccscsssesssssssosssoscsssssscssessseessecssucssucsssessscsesecsaceesesnscssesaessesssessacesauessacesacesees 50 7 7 19 COMM 2 DATA FORMAT 14H cccccesssesssoscsoccssecsoscssscsssessesssscssucssussssesessesesssusseuscessesssessuessesssavesecereneesavesees 50 7 7 20 SOFTWARE REV MINOR 15H cccsccssssssosssosssscsssecssucssucssusssssssscssusssesseacesseessessseesscssucssaeseacssucesaveseneesacesees 50 7 7 21 RESET ALARM 1GH ccsssssssosscosssssssosssossscsccssscsstessessucssussssessscssuessoscsosesesecesuersuessessseesauerstessauesacesacesasesoes 50 7 7 22 SUB MODE 47H cccoscsocsscssssesssecssecssussssssssscsssessscssscsscsssessucssucssucssuessacceseesaeessessuessucssuessaeseasessacssecssaeesavesees 51 7 7 23 ACOUSTIC TEST 18H cccccscsesssssssssssssssssssssssucssucsssessucssuecssesssessscesssesssessucssucsnsessscssucssuessaeesaceesueesecssacesacesees 51 7 7 24
81. t the value is only 23 bits long The upper bits are always zero This is done to keep the same serial number as the HART serial number Address 0x16 contains the lower part of the number and address 0X15 contains the upper part 7 7 12 TRIGGER LEVEL This is a read write register A read will return the present trigger level Since the trigger level can only be incremented by 5 only certain values are allowed EXCEPTION an illegal data value is entered must be one of the numbers in the table then the Exception Code 03 Illegal Data Value is returned voo oe Table 17 Trigger Levels 7 7 13 TRIGGER DELAY OEH This is a read write register A read will return the present time delay The time delay has a range of 0 to 600 seconds Aone represents 10 seconds EXCEPTION If an illegal data value is entered must be between 0 600 then the Exception Code 03 Illegal Data Value is returned 7 7 14 COMM 1 ADDRESS A read returns the Comm 1 address of the Observer H A write changes the address to the requested address The range of the address is 1 to 247 01 to F7 Hex After the address has been changed to the slave unit the Modbus communications will cease because the address has changed therefore the master will have to change its query address to the slave s new address in order to restart the communications EXCEPTION If an illegal data value is entered must be between 1 0x00F 7 th
82. t to the 4 20 mA output During this time a green LED will be illuminated and can be seen through the optical link window 5 5 INPUTS e Remote Alarm Reset The Observer H has provisions for a remote relay reset switch This is provided so the operator has a handy remote switch and does not have to climb up to the Observer H and reset the relays e Restore Defaults The remote reset pin is also used to reset Modbus address trigger levels etc back to the default values This is done by grounding the pin and turning the power on The pin must remain grounded for one minute after the power is turned on Alarm test The Observer H has provisions for a remote alarm test This is useful to test out the external system wiring By grounding the alarm test pin the Observer H will go to alarm and stay there until the alarm test pin is removed If the grounding time is longer than 30 seconds the device will go into fault 5 6 OUTPUT METHODS The Gassonic Observer H has 4 major output methods e Alarm Relay Output Can be configured as normally energized de energized e Errors Relay Output Relay is always configured as normally energized e 4 20 mA Analog Output Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 15 5 6 1 5 6 2 5 6 3 Can be configured as source or sink Serial Digital Communication Configurable as Dual Modbus or Single Modbus and HART optional The users need to determine t
83. tivating the ENTER switch having changed the status ON OFF will flash SAVE on the display Confirm the SAVE action by activating the ENTER switch once more Activating the MENU switch while SAVE is flashing will discard the SAVE and switch the unit back to normal operation If ENTER is activated the unit will display DONE to confirm that the changes have been saved and return to normal operation The operator can change the format settings and if desired move to the next item Address in the menu structure by activating the MENU switch straight after the change The change will be saved at a later stage by activating the ENTER switch at any point in the menu structure If no switch is activated for 60 seconds the detector will return to normal operation without saving the changed settings Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 30 5 7 11 MODBUS SETTING ADDRESS CHANNEL ONE Activating the MENU switch eleven times will display the current Address of the Modbus Factory setting is 001 Activating UP switch will increment the address and activating DOWN switch V will decrement the address the range is 1 to 247 Activating the ENTER switch having changes made will flash SAVE on the display Confirm the SAVE action by activating the ENTER switch once more Activating the MENU switch while SAVE is flashing will discard the SAVE and switch the unit back to normal
84. tivating the MENU switch straight after the change The change will be saved at a later stage by activating the ENTER switch at any point in the menu structure If no switch is activated for 60 seconds the detector will return to normal operation without saving the changed settings Installation and User Guide for Gassonic Observer H MANOBSERVER H Rev C 3 12 Page 24 5 7 5 SETTING CHECKING ALARM LATCHING ON OFF The Alarm Latching feature gives the local operator the opportunity to latch the alarm relay output in alarm even if the sound level drops below the trigger level The alarm latching is factory set to OFF Activate the MENU switch five times with the magnet stick The current Alarm Latching status will be displayed factory setting ALOF OFF Activating the DOWN switch will switch the Alarm Latching status to ON Activating the UP switch A will switch the Alarm Latching status back to OFF Activating the ENTER switch without changes made switches the unit back to Normal Operation Activating the ENTER switch with changes made will flash SAVE on the display Confirm the save action by activating the ENTER switch once more Activating the MENU switch while SAVE is flashing will discard the save and switch the unit back to Normal Operation If ENTER was activated the unit will display DONE to confirm that the changes have been saved and return to Normal Operation The operator can change the latching settings and i
85. to the slave s new baud rate in order to restart the communications Baud Rate Low Data Byte Access 19 2K 04 Read Write 9600 Read Write 4800 Read Write 2400 Read Write Table 20 Comm 2 Baud Rate This function is indicated on the Low Data Byte the High Data Byte is not used EXCEPTION If an illegal data value is entered which is not listed above then the Exception Code 03 Illegal Data Value is returned NOTE The default Baud Rate is 19200 7 7 19 COMM 2 DATA FORMAT 14H A read returns the Comm 2 data format of the Observer H A write changes the data format to the requested data format After the data format has been changed to the addressed unit the Modbus communications may cease or start producing communication errors because the data format has changed therefore the master will have to change its data format to the slave s new data format in order to restart or provide proper communications Data Parity Stop Format gn Access 8 Noe 1 8 1 00 Read Write _ Even 1 01 Read Write 8 Odd 1 801 02 Read Write _ 8 None 2 8 2 03 Read Write _ Table 21 Comm 2 Data Format This function is indicated on the Low Data Byte and the High Data Byte is not used EXCEPTION an illegal data value is entered which is not listed above then the Exception Code 03 Illegal Data Value is returned NOTE The default Data Format is 8 N 1 7 7 20 SOFTWARE REV MINOR
86. tolerance If the test signal is out of the predefined tolerance the Observer H will do a new acoustic self test 30 seconds after the first failed test If this test signal is still out of tolerance a new acoustic self test is done again 30 seconds later If the third test signal is still out of tolerance the Gassonic Observer H will go into acoustic error mode In acoustic error mode the code will be displayed the Error Relay will be de energized and the user can acquire the relay status via the Modbus or HART digital communication interfaces Furthermore the 4 20 mA output will indicate 1 mA for 5 seconds and return to normal ultrasonic background noise level until the next acoustic test failure This sequence will repeat until the acoustic fault is repaired Acoustic self test sequence There could be a number of causes for this error S B e There is an obstacle blocking the sound path i FS g ae Fo s 7 i iy i o e sound source is faulty and needs replacement gt SP S KP Pu 8 he microphone is faulty and needs replacement If none of the above is true the unit can be tested by im means of a Gain Test with a Gassonic 1701 Portable Test Acoustic selt test duration is approximately 8 seconds and Calibration Unit before sending the unit back to General Monitors for service When the detector is performing the Acoustic Self test the last dB level is displayed on the user interface and sen
87. unt is 65535 and then the counter rolls over to zero and begins counting again 7 7 32 COMM 1 BUS ACTIVITY RATE 96 21H A read indicates the Comm 1 Bus Activity Rate in percent of this Slave s addressed node versus other addressed nodes Range of this value is in hex 0 64 which translates to decimal 0 100 7 7 33 COMM 1FUNCTION CODE ERRORS 22H A read indicates the number of Comm Function Code Errors that occurred in the slave device The maximum count is 65535 and then the counter rolls over to zero and begins counting again 7 7 34 COMM 1 STARTING ADDRESS ERRORS 23H A read indicates the number of Comm 1 Starting Address Errors that occurred in the slave device The maximum count is 65535 and then the counter rolls over to zero and begins counting again 7 7 35 COMM 1 TOTAL RECEIVE ERRORS 24H A read indicates the total Modbus Comm 1 Only Receive Errors that occurred in the slave device These are address function etc type of errors The maximum count is 65535 and then the counter rolls over to zero and begins counting again 7 7 36 RXD CRC ERRORS 25H A read indicates the number of RXD CRC Errors that occurred in the slave device The maximum count is 65535 and then the counter rolls over to zero and begins counting again 7 7 37 RXD CRC ERRORS SAME AS 25H 26H Same as 25h 7 7 38 COMM 1 PARITY ERRORS 27H A read indicates the number of Comm 1 Only Parity Errors that occurred in the slave device The maximum

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