CO2 Infra Red Transmitter/ Sensor Units
Contents
1. IECEx Certificate of Conformity Certificate No IECEx TSA 06 0044X Date of issue 2012 02 15 issue No 2 Page 2 of 4 Manufacturer Ampcontrol CSM Pty Ltd 9 5 Vuko Place Wamriewood NSW 2102 Australia Manufacturing location s This certificate is issued as verification that a sample s representativa of production was assessed and tested and found to comply with the IEC Standard list below and that the manufacturer s quality system relating to the Ex products covered by this certificate was aseessed and found to comply with the IECEx Quality system requirements This certificate i sui granted subject to the conditions as set out in IECEx Scheme Rules IECEx 02 and Operational Documents as am STANDARDS The electrical apparatus and any acceptable variations to It specified in the schedule of this certificate and the identified documents was found to comply with the following standards IEC 60079 0 2004 Electrical apparatus for explosive gas atmospheres Part 0 General requirements Edition 4 0 IEC 60079 11 1999 Electrical apparatus for explosive gas atmospheres Part 11 Intrinsic safety T Edition 4 This Certificate does not indicate compliance with pia tetris IO other than those expressly included in the Standards listed TEST amp ASSESSMENT REPORTS A sample s of the equipment listed has successfully met the examination and test requirements as recorded i2. 2 75 655IL 3 Sensor CPU Catalytic Schematic Vsi 2008 04 30 24 6551L 1 Sensor CPU Catalytic Top Overlay V4 2006 11 15 24 6551L 1 Sensor CPU Catalytic Bottom Overlay V4 2006 11 15 24 6551L 1 Sensor CPU Catalytic Top Layer V4 2006 11 15 24 6551L Sensor CPU Catalytic Bottom Layer 24655IL 1 talytic Drill Drawing 75 6556L Lof2 GasGuard SM PSU Schematic ss 4 2004 05 13 75 6556L_____ 20f2 GasGuard SM PSU Schematic 6 2008 04 30 24 6556L V4 1 GesGuard SM PSU PCB Top Overlay 4 2004 05 05 24 6556L V4 1 GasGuardSMPSU PCBTopLayer 4 2004 05 05 24 6556L V4 1 GasGuard SM PSU PCB Bottom Layer 4 2004 05 05 24 6556L V4 1 GasGuard SM PSU PCB Drill Drawing 4 2004 05 05 23 5503L 01 1 Fuse Intrinsically Safe General Arrangement S 2007 0131 sense i cag ee A nani Layout amp Wiring o Remote Head Catalytic Nemoto Detector Heavy Duty Enclosure General Assembly 61 0203GG 01 23 6550LB 01 A H Manufacturing Details _ Manufacturing Details MM gt TT MD 01 i Details oo Se r ic al el Details E MD 01 N 110015 00 01 GA 01 gt Sensor Gasguard Infrared General Assembly Certificate issued by EPF011 0 Issued 19 06 2007 19 Original Issue IECEx TSA 06 0044X Variation permitted by Issue 2 Drawing 75 6565L VE
3. amp W AMPCONTROL df Gasguard CO2 Infra Red Transmitter Sensor Units Designed and Manufactured in Australia No copies of the information or drawings by Ampcontrol Pty Ltd ABN 35 000 770 within this manual shall be made without 141 Phone 02 4903 4800 Fax 02 the prior consent of Ampcontrol 4903 4888 www ampcontrol com au USER MANUAL 161296 Gasguard CO2 IR 04 09 2012 Copyright Notice No part of this publication may be reproduced transmitted or transcribed into any language by any means without the express written permission of Ampcontrol Pty Ltd 7 Billbrooke Close Cameron Park NSW 2282 Australia Disclaimer Ampcontrol Pty Ltd will make no warranties as to the contents of this documentation and specifically disclaims any implied warranties or fitness for any particular purpose Ampcontrol further reserves the right to alter the specification of the system and or manual without obligation to notify any person or organisation of these changes Before You Begin We would like to thank you for purchasing the Ampcontrol Gasguard Products To become completely familiar with this equipment and to ensure correct operation we recommend that you take the time to read this user manual thoroughly IMPORTANT WARNINGS AND ADVICE 1 The sensors should not be stored in areas that contain solvent vapours Some of these vapours are known to create false high zero points and may even damage t
4. There are only two active replaceable units in the sensor system the Amplifier PCB and the IR Sensor Assembly Therefore fault isolation is limited to the following possible faults and remedies No 4 20mA Output a Check that voltage applied to the Amplifier PCB is 12VDC and that the polarity is correct b Check for loose plug and terminal connections c If Step a above is correct and the problem persists replace the Amplifier PCB Sensor cannot be Spanned or Zeroed a Check that voltage and polarity applied to the amplifier is correct b Check for loose plug and terminal connections c Ifthe above is correct and the problem persists replace the Sensor d lfthe sensor still cannot be spanned or zeroed replace the Amplifier PCB Erratic Output a Check that voltage and polarity applied to the Amplifier PCB is correct Also check that there are no severe voltage swings indicating an intermittent fault in the field wiring or control unit b Check for loose plug and terminal connections c Ifthe above is correct and the problem persists replace the sensor d If the output is still erratic replace the Amplifier PCB sije SECTION 5 EQUIPMENT LIST Part 115239 115240 105997 105997 105441 121647 Approval Part 65 6552C02 2 65 6552C02 5 61 6552C02 2 61 6552C02 5 75 6557LB PCB E10051 GASGUARD CO2 SENSOR USER MANUAL Description Carbon Dioxide Gas Sensor Transmitter Range 0 2 CO2 Carbon
5. Dioxide Gas Sensor Transmitter Range 0 5 CO2 CO2 Sensor Head Assy Range 0 2 CO2 CO2 Sensor Head Assy Range 0 5 CO2 Replacement Amplifier Anti Vibration Clip J2 IECEx Certificate of f Conformity z lt INTERNATIONAL ELECTROTECHNICAL COMMISSION IEC Certification Scheme for Explosive Atmospheres Electrical Apparatus Optional accessory Type of Protection Marking Approved for issue on behalf of the IECEx Position Signature for printed version Date for rules and details of the IECEx Scheme visit www jecex com IECEx TSA 06 0044X issue No 2 Certificate history Issue No 2 2012 2 15 Issue No 1 2008 6 11 Current Issue No 0 2007 2 27 2012 02 15 Page 1 of 4 I Pty Ltd 7 Bilbrooke Close Cameron Park NSW 2285 Australia Gas Sensor Transmitter Gasguard Series 66 655x Ampcontrol Gas Sensor Transmitter Gasguard Series 65 655x Ex ia IP66 IECEx TSA 06 0044X Serial No Ujen Singh Quality and Certification Manager A JS FEBAuALY WP 1 This certificate and schedule may only be reproduced in full 2 This certificate ls not transferable and remains the property of the issui ing body 3 The Status and authenticity of this certificate may be verified by visiting the Official IECEx Website Certificate issued by TestSafe Austral 919 Londonderry Road de Test aate RB E TT A A LL A 13
6. Infra Red Amplifier PCB 3 Rev0 03 06 2008 Revi 04 09 2012 Cert Update 1 4 Encloasutes 4 1 4 1 Stainless Steel Housing 4 1 5 Sensor Wiring Assembly 4 tO GONNECIOA Salt 4 1 5 2 Anti Vibration Clip 4 SECTION 2 INSTALLATION 2 1 Installation Guidelines 5 2 2 Relative Density 5 2 3 Cable Resistance Consideras idad ada dia 5 2 4 Earthing Procedures 5 AS WINO T 5 SECTION 3 COMMISSIONING AND CALIBRATION Sl MMrOdUCION eree 8 3 2 Preliminary Checks 8 3 3 Gasguard Display Panel 8 3 4 System Calibration 8 3 5 Zero Calibration 9 3 6 Span Calibration 9 CONTENTS SECTION 1 DESCRIPTION 1 1 Introduction This manual provides installation commissioning and calibration and maintenance instructions for the Ampcontrol Gasguard Sensor Units Because the units are passive monitoring devices operating instructions are not applicable to this equipment This Gasguard sensor unit consists of e Infra red Carbon Dioxide Sensor CO2 e Transmitter Amplifier PCB Assembly e IP 66 Transmitter Enclosure For which the following instructions and diagrams are included in this manual GASGUARD CO2 SENSOR USER MANUAL Installation Commissioning Maintenance
7. gas range This signal is not for direct connection to other devices and so the amplifier PCB in the transmitter housing is used to condition the signal provide calibration functions and produce a 4 20mA signal The transmitter and amplifier assembly is configured in the factory for a specific gas range 1 1 3 Transmitter Sensor Specifications Specification data for the sensor is contained in Table 1 1 Detection Method Non E Infra red Maxim m Range U 2 Or U Overall Linearit lt 5 of Full Scale Maximum Drift Zero lt 2 5 of Full Scale per month Sensitivity lt 5 of Full Scale per month Repeatability lt 2 5 of Full Scale Response Time 190 lt 45 Seconds Typical Infra red Lamp Life gt 5 Years 0 01 0 90 Temperature Range 10 to 60 C Operation amp Power Requirements 12VDC O 100mA Input Parameters J5 Ui 16 5V Li lt 10 35uH Ci 40nF Voltage Range 10 16 5V DC 10 minutes Warranty 1 Year Table 1 1 Sensor Specification Data GASGUARD CO2 SENSOR USER MANUAL 1 2 Sensor 1 2 1 Carbon Dioxide Gas Sensor The Carbon Dioxide Gas Sensor works on the infra red gas absorption principle An infra red light source illuminates the sensor through a gas pathway with an optical filter that selects the appropriate wavelength for the gas being detected the presence of this gas reduces the amount of infra red energy reaching the detector This difference in infra red energy with an
8. lower end of the range the 4mA signal level indicates a zero gas concentration At the upper end of the range the 20mA signal indicates that the sensor has detected a full span gas concentration ZERO and SPAN adjustment reed relays located on the PCB are used for calibration of the instrument GASGUARD CO2 SENSOR USER MANUAL 1 4 Enclosures 1 4 1 Stainless Steel Housing The standard Stainless Steel Housing Part Number 105994 shown in Figure 1 1 incorporates the I R Sensor and Amplifier PCB The housing is robust and is corrosion resistant Itis suitable for almost all applications and provides for easy installation and maintenance When properly used it gives many years of efficient operation 1 5 Sensor Wiring Assembly 1 5 1 Connections Electrical connections for the sensor are by means of a shielded cable from the Sensor Assembly 105997 A sensor wiring assembly provides the electrical interface between the sensor and the Amplifier PCB The sensor wiring plugs into the Amplifier PCB connector J4 A second wiring assembly connects the customer supply and signal connections from the incoming terminals to the Amplifier PCB connector J5 The Sensor and Amplifier assemblies are intrinsically safe items and as such are only serviceable by authorised factory personnel See Figure 2 1 Section 2 Page 6 for wiring details Note Only sensor assembly 105990 may be connected to the main amplifier in this unit Co
9. 2 changed to 75 6565L VE3 R1 and R4 removed 2 Drawing 75 6551L Rev V4i changed to V4j Sheet 2 of 4 Gl C12 and C14 may be fitted as required C23 may be removed as required 3 The manufacturer name and address were changed from Austech Instruments Pty Ltd 8 Ponderosa Parade Warriewood NSW 2102 Australia to Ampcontrol CSM Pty Ltd 9 5 Vuko Place Warriewood NSW 2102 Australia These changes were assessed in Test Report AU TSA ExTR11 0081 00 Cond f Certification perta to Issue 2 of this Certificate Conditions of Certification are unchanged from previous issues of the certificate Drawing list pertaining to Issue 2 of this Certificate Document No Sheets Document Title Yyyy mm dc 75 6565L VE3 1 GasGuard IRCO2 Isolation Board KN 2011 10 28 75 6551L 2011 10 28 Certificate issued by Test Fs e a A U S T R A L A Page 4o0f4 EPFO11 9 lesued 19 06 2007 l Original lasue
10. A 06 0044X 2 pdf A Annexe for Certificate No Conditions of Certification i to Issue 0 of this Certificate 1 Itis a condition of safe use that the following input parameter of the apparatus for terminal JS shall be taken into account during installation JS terminals ca NY ag 6 5 Y 2 It is a condition of safe use that the remote sensor head shall be connected through a specified cable which has parameters of 206 nF km and 423 uH km The cable length shall not exceed 10 metres 3 It is a condition of safe use that the programming connector J6 RS485 port JI and the communication connector J3 are only to be used by the manufacturer in a safe area 4 It is a condition of safe use that only GasGuard IR CO sensor head can be used in the apparatus imp list to Issue 0 of this Certificate No kuuna N Document Title bas Date P N a id 156561L VEl 1 GasGuard IR CO2 Optical Bench Interface Board El 2006 11 16 75 6562L VE3 1 GasGuard IR CO2 Processor Board 2006 11 16 75 6563L VE 1 GasGuard IR CO2 Sensor Board E 2006 07 09 75 6564L VE 1 GasGuard IR CO2 Lamp Board E 2006 06 15 75 6565L VE2 1 GasGuard IR CO2 Isolation Board E2 2006 09 13 24 6561L VE GasGuard IR CO2 Optical Bench Interface Board E 2006 04 13 VE2 4 GasGuard IR CO2 Processor Board _ E2 2006 04 13 24 6563L VE 3 GasGuard IR CO2 Se
11. BRATION 3 1 Introduction Commissioning is the performance of initial checks adjustments and calibration prior to placing the system in operation for the first time Calibration however is not limited to performance of commissioning Calibration is also performed throughout the life of the system on a periodic basis and after major repairs to the system During commissioning and subsequent re calibration it is vital to ensure that procedures are followed to prevent any abnormal sensor signal from initiating any fault warn or alarm status indicator or eguipment control function on auxiliary eguipment connected to the transmitter Consult the relevant control unit manual for details of how to do this The instruments supplied are NATA calibrated prior to delivery However before putting the system into operation it is recommended to check the calibration This is especially important if the instruments are commissioned some time after delivery 3 2 Preliminary Checks Perform the following preliminary checks a Verify that all connections are correct and installation complete as detailed in Section 2 b Check that voltage available to the amplifier is 12VDC c Apply power to the system Note Following initial application of input power the display will alternate between PU amp Ir for approx 10 secs while it warms up to show the unit is Infra red The output is held at a nominal 4mA during this period af
12. Litres min c Check the surrounding airflow If the ambient air flow is above 1 5 Metres sec it can dilute the calibration gas Use a shield or bag over the sensor if there is a high wind speed d Check sensor is not blocked with dust or mud The sensor can be washed out and calibration carried out after drying e If all the above are OK and confirmation of sensor output is required it can be measured with a DVM The signal voltage developed at the sensor can be measured at the third terminal from the left on the four way plug marked Sensor on the back of the amplifier board With zero gas present this voltage should be 1 9 0 05VDC measured with respect to OV With full span gas applied this voltage should rise to around 2 1 0 05VDC If this change in voltage cannot be achieved then the sensor may need to be replaced 2 Zero The sensor zero balance is required to be within a preset level and if the sensor is damaged the zero shift may take it outside the limit Once this occurs the ERR indication is shown when trying to zero the instrument and the sensor should be replaced If during a calibration or zero procedure the instrument fails to complete the process the original settings prior to entering Cal mode will be retained If left in Cal mode the instrument will revert to normal mode after about 5 minutes retaining its last settings 3 Erratic readings Check the tightness of screw terminals on the connectors and check c
13. Sensor Wiring Diagrams Stainless Steel Housing Enclosure Dimensions Unique part numbers in accordance with the following scheme identifies the sensor unit configurations e Part Number 65 6552XXX series is for Infra red sensor units Note In the part numbers listed above XXX represents the chemical symbol for the gas detected by the unit For example 65 6552C02 2 is the part number for an Infra red transmitter unit designed to detect Carbon Dioxide CO2 in the range of 0 2 1 1 1 Gasguard CO2 Transmitter Sensor Unit Dimensions Figure 1 1 shows the bottom and front view of the Infra red Sensor 147 APPROX 170 APPROX x O amp O nl lt O M DU 91 APPROX Figure 1 1 Dimensions Infra red Sensor Weight approx 3 8KG GASGUARD CO2 SENSOR USER MANUAL 1 1 2 General Description The Transmitter Sensor assembly is an IEC Ex ia Group certified assembly The Certification is based on the unit being sealed to IP 66 and the appropriate checks being made on the Intrinsically Safe Parameters of the overall system the transmitter is connected into The Transmitter and Sensor can be mounted as an integral device but there is also an option to mount the sensor separately up to 10m from the transmitter In the remote configuration the sensor is factory fitted with a type 25 cable which is potted directly into the sensor assembly The sensor is designed to provide a standardised output applicable for the
14. at a rate of approximately 0 5 to 1 0 litre per minute using the Calibration Cup Allow sufficient time usually about 2 minutes for sensor to stabilize before adjustment GASGUARD CO2 SENSOR USER MANUAL NZ M A Men tacto vz Ama relrewerts Figure 3 1 Gasguard CO2 Control Panel 3 5 Zero Calibration Perform Zero Calibration as follows a Ensure that the sensor is in a fresh air environment and apply High Purity Nitrogen via the Calibration Cup b Place the magnetic tip of the calibration pen over the CAL symbol 1 for 5 seconds The display will flash every 1 2 seconds while in calibration mode c Now that the CAL mode is accessed place the magnetic tip over the ZERO symbol 3 for 2 3 seconds d The display should have changed to a zero reading To save the zero setting place the magnetic tip over the CAL symbol 1 for 5 seconds e The sensor display 5 will show SAU to confirm that it has saved the zero setting The display will cease to flash 3 6 Span Calibration Perform Span Calibration as follows a Apply CO2 calibration gas to the sensor at the rate of 0 5 to 1 litre per minute Use a calibration gas of suitable concentration between 1 to 2 CO2 for the 2 range unit or 2 5 to 5 0 for the 5 range unit b To adjust the display so that it reads the correct value for the gas applied enter Calibration Mode by placing the magnetic tip of the Calibration pen over the CAL symbol 1 for 5 seco
15. d without gas is used to measure the amount of gas present and is converted to an electrical output of 4 20mA by the amplifier electronics 1 2 2 Humidity Sensors cannot operate in a condensing atmosphere In such an environment a thin film of water can form across the membrane effectively sealing it and stopping the passage of gas into the sensor On evaporation of this water the sensor usually resumes normal operation Above 90 R H the sensor accumulates water vapour and may form condensation to block the infra red path used for gas detection Provided the exposure to these extremes of humidity has not been for a long period the sensors will recover when exposed to R H in the range 15 to 90 1 2 3 Pressure Effects The infra red sensors do not exhibit a permanent response to changes of pressure The CO2 sensor responds to pressure on a directly proportional basis 1 2 4 Operational Restrictions For proper operation infra red detectors need to be in a position which is free from damaging vibration and within the temperature range of 10C to 60C 1 3 Amplifier PCB 1 3 1 Infra Red Amplifier PCB The purpose of the Amplifier PCB is to convert the low level electrical output of the sensor into a signal capable of driving various types of external indicator eguipment such as the Ampcontrol Gasguard 4 Channel Controller The Amplifier PCB requires a 12VDC operating voltage and transmits a signal of 4 20MA At the
16. e maximum resistance in the 4 20mA signal to ground at 12V DC supply is 200 Ohms See Table 2 2 for typical cable resistance values 0 5 6 71 mm2 Resistance Table 2 2 Nominal Resistance Values for Wire Sizes 2 4 Earthing Procedures Consideration should be given to the earthing of the transmitters and cable screens of the incoming customer cables Normal practice would be to isolate the cable screens at the Transmitter and connect the screens to earth adjacent to the Control units or power supply to the system Remote sensor cable screens should be earthed at the transmitter 2 5 Wiring Figure 2 1 Page 6 shows the wiring of the infra red transmitter with built in Sensor Figure 2 2 details the Remote head version GASGUARD CO2 SENSOR USER MANUAL INCOMING CUSTOMER CABLES K N D gt E INCOMING USER B ee A TERMINAL BLOCK SS SER NE ze m d E Q i mi m TRANSMITTER DISPLAY SENSOR Figure 2 1 Infra red Sensor Unit Wiring Diagram AMPLIFIER POB GASGUARD CO2 SENSOR USER MANUAL INCOMING CUSTOMER CABLES N gt INCOMING USER Tii aja a TERMINAL BLOCK SCREEN CABLE CONNECTION REMOTE DETECTOR ONLY TRANSMITTER DISPLAY AMPLIFIER PCB UP TO 10 METRES OF 4 C SCR CABLE OPTIONAL CABLE BOX CONNECTOR TO IP66 SENSOR Figure 2 2 Remote Infra red Sensor Unit Wiring Diagram GASGUARD CO2 SENSOR USER MANUAL SECTION 3 COMMISSIONING AND CALI
17. ermines its propensity to rise or fall when released into the atmosphere Gases or vapours with buoyancy less than air will tend to rise from the source of release Conversely gases or vapours heavier than air will tend to fall and accumulate in concentrations over long periods of time Normal air movements in and around such gas concentrations will have the inevitable effect of producing zones of highly toxic mixtures This knowledge of the characteristics of the gas assists when determining the location of the gas sensor See Table 2 1 for gas density values For monitoring of heavier than air gases mount the sensor as close as practical to the floor or ground For monitoring of lighter than air gases install the sensor unit as high as practical The services of a Risk Assessment Engineer or specialist should be used if additional assistance is reguired in selecting the position of or the number of sensors required for the application Gas Density Hydrogen Ammonia LIGHTER THAN AIR Methane Carbon Monoxide Carbon Dioxide Nitric Oxide Nitrogen Dioxide Table 2 1 Gas Density HEAVIER THAN AIR 2 3 Cable Resistance Considerations The Infra red Amplifier PCB output is 4 20mA current The voltage available to the amplifier must be a minimum of 10VDC With a supply voltage of 12VDC the maximum cable resistance both ve 8 ve leads combined is 16 Ohms Th
18. he sensor electrodes Similarly the sensor should not be exposed to high levels of solvent vapours while in operation This equipment has been designed to detect hazardous gases and vapours and to give warning before they reach dangerous conditions In order to ensure that the equipment will warn of dangerous situations it is essential that the instructions in this manual be read understood and followed It is further stressed that the effectiveness of the device depends heavily on the user who is responsible for its correct application use and regular maintenance During start up infra red sensors will display a fault condition for approximately one minute before stabilising GASGUARD CO2 SENSOR USER MANUAL SECTION 1 DESCRIPTION SECTION 4 MAINTENANCE 1 1 Introduction 1 4 1 Periodic Maintenance 11 4 2 Corrective Maintenance 11 1 1 1 Gasguard Transmitter Sensor Unit MA a NENA 1 1 1 2 General Description 2 SECTION 5 EGUIPMENT LIST 1 1 3 Specification 2 AppendiIy ee 13 1 2 SCNSOMS carcel 3 abba Gas Ser sn 3 Certificate of Conformity 13 12 2 MAMON ai ea emm asa Suni na kalus 3 1 2 3 Pressure Eifects 3 1 2 4 Operational Restrictions 3 DesumantRavision Histor 1 3 Amplifier PCB 3 n 1 3 1
19. losure Manufacturing 06 09 Details o N 29 6555C02 01 MA Label CO2 2 In S Steel Enclosure Manufacturing iii 2006 09 14 Details Variations Permitted by Issue 1 1 The Sensor Transmitter Gasguard series 65 655 1 CH4 was added in the certificate Remove the inductors L4 and L5 in the transmitter circuit Change sinter on the IR version to 2 baffle plate Ampcontrol address was changed from 250 Macquarie Road Warners Bay NSW 2282 to 7 Bilibrooke Close Cameron Park NSW 2285 e N These changes were assessed in Test Report AU TSA ExTR08 0004 00 Conditions of Certification ining to Issue 1 of this Certificate 1 Itisacondition of safe use that the following input parameter of the apparatus for terminal JS shall be taken into account during installation Parameters JSterminals Uu ___ 16 5 V Test ate AUSTRALIA Page 2 of 4 EPF011 0 issued 19 06 2007 18 Original Issue 2 It is a condition of safe use that the remote sensor head shall be connected through a specified cable which has parameters of 206 nF km and 423 uH km The cable length shall not exceed 10 metres 3 It is a condition of safe use that the programming connector J6 RS485 port Jl and the communication connector J3 are only to be used by the manufacturer in a safe area 4 It is a condition of safe use that only 61 0203 combustible sensor shall be used in the apparatus vvvv mm dad 004 05 12 Drawing list to 1 of
20. n Tost Report AL TSA ExTRO6 0066 00 AUITSAVExTR08 0004 00 AU TSA EXTR11 0081 00 Quality Assessment Report AUNTAMIAR08 0002 05 AA IECEx Certificate of Conformity IECEx TSA 06 0044X 2012 02 15 agus No Z Page 3 of 4 Schedule EQUIPMENT Equipment and systems covered by this certificate are as follows The Gas Sensor Transmitter Gasguard 65 655x series use a common transmitter section with alternate sensors to suit the ges being sensed The transmitter uses an extemal d c power supply A serial communication port an RS 485 port and a programming port available Internally within In the apparatus are only to be used by the manufacturer in a safe area The sensor reading ls displayed on an LCD display panel The Gasguard 85 8552 CO2 has an Infrared CO sensor head The sensor head can elther be fixed on the transmitter _or remately connected by a specified cable The Gasguard 66 6561 CH4 has a catalytic sensor head The sensor head can elther be fixed on the transmitter or remotely connected by a specified cable CONDITIONS OF CERTIFICATION YES es shown below Please refer to Annexe of the certificate 15 IECEx Certificate A Certificate No IECEx TSA 08 0044X Data of lesue 2012 02 15 lasue No 2 Page 4 of 4 DETAILS OF CERTIFICATE CHANGES for lsauos 1 and above Please refer to Annexe of the certificate Annexe Annexe for ECEx TS
21. nds The display will flash every 1 2 seconds c Place the magnetic tip of the pen over the UP symbol 4 to increase the display reading and over the DOWN symbol 6 to decrease the display reading Place the magnetic tip over the CAL symbol 1 for 5 seconds once the display reads the correct value for the gas applied The display will cease to flash d Shut off the calibration gas If the Zero calibration is to be checked wait for the sensor to stabilise before proceeding Note Human breath contains a high concentration of CO2 and this may cause the instrument to read above zero GASGUARD CO2 SENSOR USER MANUAL 3 6 1 Calibration Problems Gasguard Sensor Transmitter Fault Codes Refer Table 3 1 If during calibration or zero of the Gasguard CO2 Transmitter the fault indication on the local display is shown as ERR then possible reasons are as follows 1 Calibration If the fault code appears during calibration it will normally be when adjustment by the Up or Down arrows is attempted The code indicates that the output of the sensor is insufficient and the sensor will need to be changed Several things should be checked before changing the sensor a Check the calibration gas lt should be a correct range in air mixture although other trace gases may be present Lower percentage gas mixtures will reduce the output leading to unnecessary change out of the sensor b Check the gas flow to ensure it is within 0 5 to 1 0
22. nnection of any other type of sensor head will render the unit non operational Customers should ensure that the correct range Sensor and Transmitter assemblies are matched together 1 5 2 Optional Anti Vibration Clip An optional Anti Vibration clip Pt No 121647 can be fitted to the connectors J4 amp J5 on the rear of the Amplifier PCB This is only needed in areas of high vibration Figure 1 2 Anti Vibration Clip GASGUARD CO2 SENSOR USER MANUAL SECTION 2 INSTALLATION 2 1 Installation Guidelines To ensure continued reliable operation of the sensor system the following installation guidelines should be observed e Confirm the Intrinsically Safe parameters of the transmitter cables and power supply are suitable for the application e Select a suitable central location for mounting with good access The location should be as clean and dry as practicable and at a temperature as close to 20 C as practicable e Mountthe sensor unit in a position that reduces the risk of mechanical damage e Mounting should be to a vertical surface pointing downwards allowing for easy wiring access and subsequent servicing e Itis essential that the sensor be positioned to take into account the expected flow of the gas to be measured e Allow sufficient space under the sensor for fitting of calibration cups or accessories 2 2 Relative Density The relative density or buoyancy of the gas or vapour with respect to air det
23. nsor Board 24 6564L VE 3 GasGuard IR CO2 Lamp Board 2006 04 13 24 6565L VE1 v Details N Sinter Cupro Nickel H D LR Sensor Manufacturing Details Housing Body H D 1 R Sensor Manufacturing Details E E kA Mi 2006 07 27 25 0021L 01 i 00 6 X a S gt 25 0023L 01 gt 35 5501L 2006 09 12 Housing Top H D LR Sensor Manufacturing 2006 02 06 Details s Mounting Plate H D LR Sensor Manufacturing 2006 09 12 i Details e Details W Test Ho ate A U S T R A L A Page 1 of 4 EPFD11 0 Issued 19 08 2007 AG Original lasus Bu 4 i P a SL y i 4 1 A l Bat i Annexe for Certificate No IECEx TSA 06 0044X issue No 2 OO N N ryyy mm dc Ha Manufacturing Details N m Kill i Infrared Sensor Assembly Details W 61 6552CO2 01 Sensor CO2 Gasguard Infrared General Assemb TZ bo 2 is 1 al 1 M N Assembly N N 7 dl al el General Assembly o 61 6552C02 04 Reflector amp Lamp Detr Block CO2 Heavy Duty Infra Red Sensor Arrangement 65 6552CO2 01 CO2 H D I R Transmitter With Display In Stainless 2006 09 11 Steel Enclosure Layout amp Wiring 65 6552C Detector CO2 Remote In Stainless Steel Enclosure Layout Wiring 65 6552C02 R EE Detector CO2 Remote With Cable Box Connector MA 2006 09 15 HI lt gt hoi General Arrangement 29 6554C02 01 UNE Label CO2 In S Steel Enc
24. onnectors are pushed fully home Fit anti vibration clip if the problem persists 10 GASGUARD CO2 SENSOR USER MANUAL SECTION 4 MAINTENANCE 4 1 Periodic Maintenance Periodic maintenance consists mainly of scheduled checks to ensure the instrument remains in adjustment and gives the required response to sampled gas The following maintenance schedule is recommended Daily Verify operation by visually checking the reading on the respective control unit monitor Investigate any abnormal deviations from expected background levels Monthly a Check the Zero reading in Nitrogen for one minute re adjust non zero as necessary b Check the Span calibration on a known sample of CO2 gas in air Re adjust as necessary As Required Replace sensor whenever it becomes impossible to adjust to Zero or when the Span adjustment is insufficient to enable adjustment to the calibration gas value If this occurs recalibrate the unit as described in Section 3 Commissioning and Calibration Following Power Removal If power has been removed from the unit for more than a week a re commissioning check should be carried out 4 2 Corrective Maintenance During maintenance it is vital to ensure that suitable procedures are followed to prevent any abnormal sensor signal from unintentionally operating any fault warn or alarm status indicator or equipment control function Consult the relevant control unit manual for details as to how to do this
25. ter which it displays 0 46 for up to 30 seconds before reading zero 0 05 Providing no gas is present 3 3 Gasquard Display Panel To assist in fault finding the Gasguard display panel will indicate the following Display Description 777 There is no sensor plugged into the amplifier LES needs reconfiguration Error has occurred Calibration mode initiated display blinks when in calibration mode Calibration settings have been saved PU Ir Powering Up Infra red Unit Table 3 1 3 4 System Calibration Before the start of calibration the system should be left in a powered up operational no fault state for one hour to allow the gas sensors to stabilise However if such a delay is not practical observe the display indications with the sensor in a gas free atmosphere until there is no appreciable display movement for a period of time The system should then be sufficiently stable to allow calibration During calibration avoid breathing over unit since carbon dioxide from exhaled breath will affect the readings e Calibration of sensors can only be achieved by using the appropriate gas That is the gas that the sensor is designed to detect A calibration gas should be 50 of full scale of the relevant monitor e For gas detection if reading inaccuracies cannot be avoided sensors should always be calibrated on the high side for safety reasons e Calibration gas should be applied to the sensor
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