OLDHAM MX 42A User Manual
Contents
1. t 4 SETTING CHANNEL 3 _ CHANNEL 3 RECORDER 12 b Special case of intrinsic safety detectors In an area classified as having an explosive atmosphere the electrical connection between the detection unit and the detector must be of the intrinsic safety type This requires the use of acertified barrier the conformity of the connecting cable electrical parameters stipulated in the certificate of conformity of the detector to the legislation in force Figure 4 shows the connection of the detector and of the barrier according to the type of barrier employed CAUTION The conformity of the complete electrical safety system is not the responsibility of INDUSTRIAL SCIENTIFIC 2 4 Connection of the detection unit to external devices 2 4 1 Connection to servocontrols The MX 42 detection unit has 10 relays which can be used to control external devices horn solenoid valve telephone call exhaust fans The relays are assigned to functions as follows for each channel e onerelay RELAY 1 for triggering of alarm 1 e onerelay RELAY 2 for triggering of alarm 2 or a total of 8 relays forall channels e acommon relay CR RELAY for triggering of alarms 3 of the channels e one relay FAULT RELAY associated with faults detected on the channels detector malfunctions poor electrical connections An exampl2. 9 2 3 Connection of the detection unit to the detectors 9 2 3 1 Physicallayout Ol deteclOlS Coe enn 9 2 3 2 and connection of detectors fig 3 11 2 4 Connection of the detection unit to external devices 13 84 1 Connection SEEVOCONIO S o aoi 13 2 4 2 20 MA CUrFentollbUbassueuso vid veis vido 13 3 START UP AND OPERATIONS 1 5 15 4 CONFIGURATION OF ALARMS AND SERVOCONTROL 17 4 1 Characteristics of alarm triggering 17 4 2 JProgramiihg ol Dem Reno dun 20 DO HELV OC 611115 23 49 11 FACTAY S ee eee 23 43 2 4 20 Rs 23 5 PERIODIC SERVICING ac 640 88892205482 25 5 1 Adjustment of detectors from the MX 42A detection unit 25 5 2 Local adjustment at the 26 6 IROBUBEESHOOTINGO 5 27 7 DETAILED TECHNICAL CHARACTERISTICS eere eene enne 28 20851101 ocu
3. lt I 5 PERIODIC SERVICING Gas detection instruments are potential life saving devices Recognizing this fact Industrial Scientific Corporation recommends that a functional bump test be performed on every fixed gas monitoring instruments as part of a regular maintenance program A functional test is defined as a brief exposure of the detector to a concentration of gas es in excess of the lowest alarm set point for each sensor for the purpose of verifying sensor and alarm operation and is not intended to be a measure of the accuracy of the instrument Industrial scientific further recommends that a full instrument calibration be performed using a certified concentration s of calibration gas es quarterly every 3 months Calibrations may be necessary more or less frequently based for example on application field conditions exposure to gas sensor technology and environmental conditions The frequency of calibration is best determined by company policy or local regulatory agencies If an instrument fails to operate properly during any functional bump test full instrument calibration should be performed successfully prior to use These recommendations are based on safe work procedures industry best practises and regulatory standards to ensure worker safety Industrial scientific is not responsible for setting safety practices and policies For new installations it may be prudent to carry out bump tests frequentl
4. OLDHAM Gas Monitoring Solutions INDUSTRIAL SCIENTIFIC R f 42 ISO 9001 Made in VERSION 2000 France INDUSTRIAL SCIENTIFIC GAS DETECTION We are delighted that you have chosen an INDUSTRIAL SCIENTIFIC instrument and would like to thank you for your choice We have taken all the necessary measures to ensure that your instrument provides total satisfaction Now it is important to read this document carefully EXTENT OF RESPONSIBILITY INDUSTRIAL SCIENTIFIC declines its responsibility towards any person for material damage physical injury or death resulting wholly or partly from inappropriate use installation or storage of its equipment resulting from failure to observe instructions and warnings and or standards and regulations in force INDUSTRIAL SCIENTIFIC neither supports nor authorises any company physical or moral person to assume responsibility on behalf of INDUSTRIAL SCIENTIFIC even if it is involved in the sale of INDUSTRIAL SCIENTIFIC products INDUSTRIAL SCIENTIFIC cannot be held responsible for direct or indirect damage or be required to pay direct or indirect compensation resulting from the sale or use of any of its products IF THESE PRODUCTS HAVE NOT BEEN DEFINED AND CHOSEN BY INDUSTRIAL SCIENTIFIC FOR THEIR SPECIFIC USE CLAUSES CONCERNING PROPERTY Drawings plans specifications and information included in this document contain confidential in
5. or 32 ohms in a loop Toxic gas or oxygen detectors of 4 20 mA type a shielded cable with 2 wires Resistance of detection unit detector cable maximum 16 ohms per wire length km cable 3 x 1 5 mm 32 ohms in loop It is specified that e detectors are connected by SHIELDED CABLES e using shielded cables is compulsory e the screen of shielded cables must be connected to the earth at two extremities detectors and control unit e connections to the earth are considered as equipotential a Parking garage application Toxic gas detectors Co parking type can be mounted in parallel in the event that it is necessary to obtain an average gas concentration It is absolutely essential that the detectors be located in the same area A max of five detectors can be connected in parallel Connection of the Zener barrier Hazardous area Safe area 11 The Figure 4 describes the connection between the detector and the barrier Figure 4 Connection of intrinsic safety detectors TUCO OOO 20 DETECTOR lt 4 mA SETTING CHANNEL 1 en 1 Ij WIRE v _ g WIRE 4 e 8 OUTPUT T gt e 4 2 RELAY 1 CHANNEL 1 RELAY 2 CHANNEL WITHOUT EXPLOSIVE ATMOSPHERES qe EXPLOSIVE 1 2 ATMOSPHERES P v i transmitters transmitters Figure Example of connection to external devices
6. 25 A time delay fuse or 48 V 43 V to 60 V protected by an F3 2 A time delay fuse A sticker on the casing gives the power supply voltages 2 3 Connection of the detection unit to the detectors 2 3 1 Physical layout of detectors Their location depends on three main factors Density of gas to be detected 1n elevation for gases lighter than air and low down for gases heavier than air Leak point determination of the probable source of a leak In the flow of air in ventilated rooms Figure 3 Transmitters 4 20 mA 2 wires Explosimetric transmitters catalytic celles with 3 wires 4 20 mA 3 wires for flammable gas transmitters CHANNEL 3 RELAY 2 L I gt 2 m Cel 4 20 mA 2 wires transmitters for parking CO detection RELAY 2 zi CHANNEL 4 10 JdALHI3H L OL DNIGHOOOV SHO19O313G 40 WYHOVIGO 9NLLO3NNOO 2 3 2 and connection of detectors fig 3 3 types of detectors are to be differentiated Explosimetric detectors of the BRIDGE type no integrated electronics 3 connecting wires of an armoured cable Resistance of detection unit detector cable maximum 8 ohms per wire length 500 m cable 3 x 1 5 mm 16 ohms in a loop Explosimetric detectors of the 4 20 mA type a shielded cable with 3 wires of an armoured cable Resistance of detection unit detector cable maximum 16 ohms per wire length km cable 3 x 1 5
7. A time delayed for 230 V and 110 V 4 A for 24 V 2 A time delayed for 48 V Power consumption 85 VA or 67 W On off switch inside casing Earth terminal yes Cable outlet through 10 metallic cable glands connected to the earth Maximum shielded cable diameter 10 mm 28 7 4 Measurement inputs Line resistances loop in ohms between detector and detection unit Explosimetric detector of the BRIDGE type 3 wires 16 ohms 500 m long cable x 1 5mm Explosimetric detector of 4 20 mA type 3 wires or 2 wires 32 ohms 1 km long cable 3 x 1 5mm 7 5 Alarm Visual alarms provided for each channel fault signal lamp channel in service green color channel off or malfunction of microprocessor off disturbance on line steady yellow color calibration adjustment mode blinking yellow color alarm 1 signal lamp red color when alarm alarm 2 signal lamp red color when alarm alarm 3 signal lamp red color when alarm Alarms 1 and 2 activation after 5 seconds increasing or decreasing value manual or automatic clearance Alarm 3 activation after elapsed delay time or on basis of average value automatic clearance increasing or decreasing value Disturbance complete check of short circuit or cut out of at least one wire with just one detector display per channel with yellow signal lamp Buzzer Triggered microprocessor malfunction anomaly of connecting cable or de
8. ecl I 28 n gt or ao do did 28 VEN 28 TA Measurement WADING semences E erreurs uit 29 POS e 29 GO 01 5 30 us 30 7 9 E 30 8 aae vecevesnwessveonuesaucs 31 9 LIST OF MX42A SPARE PARTS ts 31 31 9 2 Intrinsic barriers and ood ote i eroe deux anis 31 10 Special Specifications for use in Potentially Explosive Atmospheres in accordance with European Directive ATEX 94 9 EC 32 10 1 opecifications for mechanical and electrical installation in Classified Areas 32 102 Metrological mp mU dme n ME E SEM UE 32 10 3 Connecting detectors other than INDUSTRIAL SCIENTIFIC detectors to the OVI eiie up mde 33 10 3 1 Device transfer curves in 096 to 100 LEL configuration 33 10 3 2 Device transfer curves in 0 to 30 0 OXYGEN configuration 34 10 3 3 Power supply and load resistance characteristics 34 10 4 MAR RING e 34 Figur
9. est conforme aux exigences des Directives Europ ennes suivantes comply with the requirements of the following European Directives I Directive Europ enne ATEX 94 9 CE du 23 03 94 Atmosph The European Directive ATEX 94 9 CE of 23 03 9 Explosive Atmospheres Normes harmonis es appliqu es EN 50054 EN 50057 EN 50104 EN 50271 Harmonised applied Standards Performances m trologiques pour la d tection des gaz combustibles et de l oxyg ne Performance requirements for combustible gases and oxygen N Attestation CE de Type du mat riel INERIS 04ATEX0064 of EC type examination certificate Cat gorie Category II 2 G N de la Notification Assurance Qualit de INERIS 00 403 Production de l usine de fabrication de Arras N of the Production Quality Assurance Notification of the Arras factory D livr s par 1 Organisme notifi sous le num ro 0080 INERIS rue Taffanel 60550 Verneuil Issued by the Notified Body n 0080 en Halatte France The European Directive EMC 89 336 CEE of 3 05 89 ELE C 5 ROMAGNETIC COMPATIBILITY Normes harmonis es appliqu es EN 50081 1 2 EN 50082 1 2 Harmonised applied Standards Directive Europ enne 73 23 CEE 93 68 CEE du 22 07 93 Basse Tension The European Directive LVD 73 23 CEE 93 68 CEE of 22 07 93 Concerning Low Voltage Normes harmonis es appliqu es EN 61010 1 Harmonised applied Standards Arras le 17 1
10. mode the current output 1 set to 2 mA Caution If forgotten the channel automatically changes over to fault after 1 2 hour 5 2 Local adjustment at the detectors For some types of detectors particular the 4 20 mA detectors the zero and sensitivity can be adjusted directly on the detector refer to the detector instruction manual Note We are at your disposal to supply you with calibration gas or an annual servicing contract The work under this contract 1 performed by our specialists and this contract will guarantee perfect operation of the installation Between the dates of the scheduled servicing work performed by INDUSTRIAL SCIENTIFIC no adjustment 1 necessary The maintenance department of the user is thus not burdened by any additional work load 26 6 TROUBLESHOOTING FAULT MESSAGE CAUSES CORRECTIVE ACTION Display off or no signal fuse blown check power supply lamp lighted voltages and change the fuses if switch on OFF necessary cf 22 set the switch to ON cf III STOP displayed put the channel in service cf 41 INIT displayed channel undergoing initialization message displayed as soon as a channel is put into service cf III Fault signal lamp lighted bad detector electrical connections check the connections yellow defective detector change the detector the type of detector does not change the type of detector correspond to the factory Caution The channel could config
11. 2 04 Le Repr sentant de l entreprise Lionel Witrant On Behalf of the firm irecteur Technique Technical Director 35 Nous nous engageons We undertake Les Plus Au travers de notre service client r pondre rapidement et efficacement a vos besoins de conseil suivi commande et ce partout dans le monde r pondre dans les plus brefs d lais a toutes questions d ordre technique Qualit A vous assurer la meilleure qualite de produits et de services conformement aux normes et directives internationales en vigueur Fiabilit amp Contr les vous fournir un mat riel fiable La qualit de notre production est une condition essentielle cette fiabilit Elle est garantie gr ce des v rifications tr s strictes r alis es d s l arriv e des mati res premieres en cours et en fin de fabrication tout mat riel exp di est configur selon vos besoins Mise en service mettre en service sur demande votre mat riel par nos techniciens qualifi s Ism ATEX Un gage de s curit suppl mentaire Formation dispenser des formations cibl es Contrat d entretien vous proposer des contrats d entretien volutifs au regard de vos besoins pour vous garantir une parfaite s curit Une ou plusieurs visites par an garantie totale ou partielle Renouvelable par tacite reconduction Incluant le r glage des d tecteurs de gaz fixes ou portables et le contr le des a
12. 3 When a threshold is reached the associated lamp and relay are activated When the threshold decreases the signals are automatically deactivated With manual clearance micro switch 3 When a threshold is reached the lamp and relay are activated When a threshold decreases the signals are deactivated by the manual reset button being pressed Note Threshold alarm 3 has automatic clearance a Special case of the 3rd alarm threshold The 3rd alarm relay common to the channels are energized either after a period of time set by micro switches 9 and 10 The ALARM 3 DELAY TIME CODING table gives the position according to the desired lapse time required or when the average value reaches the 3rd alarm threshold The time of averaging is set in the maintenance adjustment Section 4 2 Microswitch 2 is used to set alarm 3 on either delay time or averaging 17 Figure 8 Tripping of alarms and 2 in parking garage cycle Assumptions threshold 2 gt threshold 1 Relay 1 associated to low speed LS Relay 2 associated to high speed HS Relay 1 AND 2 i deactivated for at least 10 minutes BEGINNING Deactivate relay 1 wait 1 minute activate relay 2 ge buzzer 18 b Special case of alarms and 2 in parking garage cycle With micro switch 5 it is possible to select the way in which relays and 2 will be activated 1 6 according to a special control cycle used only to start extr
13. 8 Scrapping of mx42a Concerning the conservation of the protection and the improvement of the quality of the environment as well as for the protection of the health of the persons and the careful and rational use of natural resources MX42A has to be the object of a selective collection for the electronic equipments and cannot be scrapped with the normal domestic waste The user thus has the obligation to separate the MX42A of the other waste so as to guarantee that it is recycled in a sure way at the environmental level For more details of the existing sites of collection contact the local administration or the distributor of this product 9 LIST OF MX42A SPARE PARTS 9 1 Spare parts MX42A casing 6321280 9 2 Intrinsic barriers and accessories MODELS OF SI REFERENCE TYPES INDUSTRIAL SCIENTIFIC BARRIERS CASING 1787 EX 6184703 DIN mounted MTL787S 6797100 Obligatory flammeproof casing barriers mounted model barriers for 12 zener barriers 31 10 Special Specifications for use in Potentially Explosive Atmospheres in accordance with European Directive ATEX 94 9 EC The 42 detection device designed to measure explosive gasses and oxygen complies with the requirements of European Directive ATEX 94 9 EC on potentially explosive atmospheres As a result of its metrological performance as tested by the research and testing organisation INERIS the MX42A device is class
14. actor fans especialy in parking garages In this case alarm 1 15 generally associated with the low speed LS of the extractor fan Alarm 2 15 associated with the high speed HS of the fan The control cycle in the parking garage mode is provided to avoid destruction of the fan due to sudden change over from low speed to high speed The control logic is shown in Figure 8 ik ape i Li E LI al 1 LI Figure 9 Im 10 40 VIEW ENTER 19 4 2 Programming of parameters The alarms are adjusted in the factory However these adjustments can be changed For the selected channel use the following configuration Figure 9 Switch 8 on Switch 7 maintenance Switch 6 adjustment In this mode keys 1 2 3 and 4 have the following functions Key 4 enter change over to following parameter Key 3 view the value of the parameter Key 2 key increments the parameter Key 1 key decrements the parameter The following parameters are accessed successively ALI alarm 1 threshold AL2 alarm 2 threshold AL3 alarm 3 threshold averaging time of alarm 3 0 lt val lt 1999 minutes PT sets the position of the decimal point according to the detector measuring range SUP overrange EXAMPLE 1 positioning alarm 3 at 150 for channel 2 On micro switch block of channel 2 position micro switch 7 to MAINTENANCE 6 to ADJUSTMENT The LCD disp
15. e 1 1 DESCRIPTION fig 1 The 42A detection unit is an apparatus for the detection and measurement of various combustible toxic or oxygen carrying gases The 42A detection unit has 4 independent measuring channels Each channel is connected to gas detector located in places to be monitored The measurement from the detector is displayed on the MX 42A detection unit and compared to alarm thresholds Should alarm thresholds be exceeded the MX 42A detection unit actuates relays which can be used for the control of outside devices horn telephone call exhaust fans etc Note the detection unit also comes in a 2 measuring channel version Main characteristics cf Figure 1 Casing for wall mounting made of PVC length 340 height 300 depth 107 with intern plating AC or DC power supply 4 measuring inputs for detectors of the explosimetric toxic or oxygen type or other type on request Visualization of the measurement by LCD Alarms per channel e 2 increasing or decreasing thresholds manual or automatic clearance control logic of exhaust fans on programming e increasing or decreasing threshold automatic clearance triggering on basis of time on averaging Relaying a total of 10 relays distributed as follows e 2 relays per channel NO or NC for the first two alarm thresholds e relay common to the channels for the third alarm threshold or the remote transmission of the alarm
16. e buzzer can be inhibited by moving the strap on the display board top right corner to the OFF position 15 NORMAL Figure 7 POSITION 1 INCREASE DELAY TIME MANUAL INCREASE ON OFF DELAY TIME CODING 16 2 m i gt n di Q Tl Q3 Av 130 NO Q3NOLLISOd SI N3HM WHY TV JHL SNIAIS E Q1OHS3HH L WHV TV LNVAS 13H 4 CONFIGURATION OF ALARMS SERVOCONTROL Caution Adjustments described in this section are to be performed by authorized personnel only as they are likely to jeopardize detection on which safety depends 4 1 Characteristics of alarm triggering There are three alarm thresholds associated with each channel Threshold 1 controls Alarm 1 signal lamp and relay 1 Threshold 2 controls Alarm 2 signal lamp and relay 2 Threshold 3 controls Alarm 3 signal lamp and the CR relay common relay Note The CR relay is common to all channels For each channel a block of micro switches are located on the display board and are used to program the characteristics of alarm thresholds Figure 7 Each channel is put into service by micro switch 8 ON OFF The alarms can be given increasing or decreasing values Programed by micro switche 4 for alarm 1 and 1 for alarms 2 and 3 The alarms can be set With automatic clearance micro switch
17. e of a connection 1s given in Figure 5 e a light and buzzer connected to RELAY 1 of channel 4 will be actuated when alarm 1 of channel 4 1s present e a solenoid valve connected to RELAY 2 of channel 4 will be actuated when alarm 2 of channel 4 1s present Note Considering the low breaking power of the MX 42 relays 2 A with 240 AC or 30 VDC external relays must be interposed if the devices to be controlled have high power 2 4 2 4 20 mA current output For each channel the MX 42 detection unit has a 4 20 mA output which can be used for the copy of measurements on a recorder or an external controller In a loop configuration the maximum resistance 1s 600 ohms The 4 20 mA outputs have common outer earth connections An example of a connection to a recorder on channel 3 1 shown in Figure 5 13 Figure 6 _ 3 START UP AND OPERATION Once the detection unit has been installed and connected it is started up with the switch located on the inside bottom left corner The MX42 goes on test mode checking the proper operation of the LEDS LCD and the buzzer All alarms are inhibited during test mode Then the MX 42 displays channel 1 during one minute before starting scrutening all channels 2 cases can happen a Channel 1 is off inter 8 The display indicates STOP 5 the green signal lamp display 5 15 steady on and
18. formation that is the property of INDUSTRIAL SCIENTIFIC None of this information may be reproduced copied divulged or translated by physical electronic or any other means nor used as the basis for the manufacture or sale of INDUSTRIAL SCIENTIFIC equipment or for any other reasons without prior consent from INDUSTRIAL SCIENTIFIC WARNINGS This document is not contractually binding In the interests of its customers INDUSTRIAL SCIENTIFIC reserves to modify the technical specifications of its equipment without notice in order to improve its performance READ THIS MANUAL CAREFULLY BEFORE FIRST USE OF THE EQUIPMENT this manual must be read by any person who is or will be responsible for using maintaining or repairing this equipment This equipment will only provide the announced performance levels if it is used maintained and repaired according to INDUSTRIAL SCIENTIFIC directives by INDUSTRIAL SCIENTIFIC personnel or by personnel approved by INDUSTRIAL SCIENTIFIC GUARANTEE 2 years guarantee in normal conditions of use on parts and technical labour return in our workshops excluding consumables sensors filters etc 1 DESCRIPTION fig PRE 7 2 INSTALLATION eee 9 2 1 18101 een anne TET 9 2 2 Electrical connection of the MX 42A detection unit fig 2
19. ified as a safety device when used with INDUSTRIAL SCIENTIFIC CEX300 and OLC OLCT 20 40 50 and 60 series detectors The device may therefore contribute to limiting the risk of explosion as a consequence of the data it supplies to external units The information contained in the following paragraphs should be adopted and complied with by the person responsible for the site which the equipment 15 installed Please refer to the provisions of European Directive ATEX 1999 92 EC on improving health and safety conditions for workers exposed to potentially explosive atmospheres 10 1 Specifications for mechanical and electrical installation in Classified Areas Installation will comply with all applicable standards and particularly with EN 60079 14 EN 60079 17 and EN 50281 1 2 The MX42A device must not be subject to intense mechanical vibration and must be installed 1n a safe area away from potentially explosive atmospheres It is essential to refer to the user and installation manuals for the gas detectors referred to above particularly the paragraph entitled Special Specifications for use in Potentially Explosive Atmospheres in Accordance with European Directive ATEX 94 9 EC Where intrinsic safety installations are concerned it should be borne in mind that the person responsible for IS installation the System Designer must draw up a system document demonstrating that every aspect of the Power Cable Detector system complies with i
20. lays ALI Press the enter key The LCD displays AL2 Press the enter key The LCD displays AL3 Press the view key The LCD displays the present value of the alarm 3 threshold With the and keys set the desired threshold Press the enter key The threshold 1 memorized Set micro switch 7 to normal 20 EXAMPLE 2 How to program the function overrange SUP gt Concerning a new function 100 LEL overrange software version V9 gt That function can be preprogrammed in operation or not gt Procedure of programming Consult chapter 4 2 informations technical manual to use the keypad The new list of programmable parameters will be ALI AL2 AL3 TI PT and now SupX X preprogrammed channel number The parameter SUP will be inhibited if OFF touche 1 validated touche 4 The parameter SUP will be in operation if ON touche 2 validated If the function SUP is validated and if your are detecting a concentration of 100 LEL or more the display will show this message SUP and you will be blocked If the function SUP 1 triggered all the alarms gas and default will be activated To acknowledge this alarm SUP Either you move the switch 7 see picture 7 Or you move the switch 8 see picture 7 Or you move the switch of power supply see picture 2 Note The fault lamp blinks to signal the maintenance mode The maintenance mode la
21. ntrinsic safety Please refer to EN 50039 for group II and EN 50394 1 for group I when drafting this document 10 2 Metrological Specifications The device complies with the following European standards With explosive gas detectors European standards EN 50054 and EN 50057 for Methane calibration gas Propane and Hydrogen gasses following response curves where the device is used with CEX300 and OLC OLCT 20 40 50 and 60 series gas detectors Where the device 1s used with other types of sensor producing an output measurement current of 4 20 mA these must comply with paragraph 1 5 of Appendix II of the ATEX 94 9 EC Directive and be compatible with their characteristics cf device transfer curve European Standard EN 50271 32 Oxygen detectors European Standard EN 50104 where the device is used with OLCT 20 40 50 and 60 gas detectors Where the device is used with other types of sensor producing an output measurement current of 4 20 mA they must comply with paragraph 1 5 of Appendix II of the ATEX 94 9 EC Directive and be compatible with their characteristics cf device transfer curve European Standard EN 50271 10 3 Connecting detectors other than INDUSTRIAL SCIENTIFIC detectors to the 42 device As previously explained users wishing to connect detectors other than those manufactured by INDUSTRIAL SCIENTIFIC must ensure their compatibility with the device in order that the resulting combination may be c
22. on programming e relay common to the channels for detector faults and anomalies 4 20 mA output per channel lt 1 mA for fault 2 mA for maintenance Resettable buzzer should alarms or an anomaly appear 315 Figure 2 2 INSTALLATION AND CONNECTIONS Please ensure you read the paragraph Special Specifications for use in Potentially Explosive Atmospheres in Accordance with European Directive ATEX 94 9 EC 2 1 Installation The detection unit can be installed in any place without an explosive atmosphere It should be put in a well ventilated place where it can be watched guard house control room security service It is attached according to Figure 2 4 attachment points marked 1 2 3 and 4 with centres of 314 x 245 mm using 5 mm screw Caution So that the cover of the detection unit can be completely opened there must be at least 30 cm of free space above it Before installation switch off the MX42A with the switch located on the inside bottom left corner 2 2 Electrical connection of the MX 42A detection unit fig 2 Power supply connect the power supply wires to the terminal blocks of the detection unit Earth live and neutral terminals 220 AC 207 V to 244 V 50 60 Hz protected by an F1 630 mA time delay fuse DC DC terminals 24 V 19 V to 32 V DC protected by an F2 4A fuse On option either 115 V AC 103 V to 122 V 50 60 Hz protected by an F1 1
23. onnects a brand of detector other than INDUSTRIAL SCIENTIFIC to the MX42A device he must check carefully that the transfer curve is fully compatible with the device input characteristics to ensure that the data generated by the detector is correctly interpreted Equally the device must supply a suitable power supply voltage allowing for cable voltage losses Display in O2 by pm Fault i 39 4 2 Faut EE EE X 0 0 Le Mem E E E 5 0 2 77777 Fault 2 EE Signal supplied 1 3 4 20 25 by mA mA mA mA 10 3 3 Power supply and load resistance characteristics Maximum current available between terminals 2 and 3 250 mA at 19 V Maximum no load voltage between terminals 2 and 3 30 V Load resistance outside the IS barrier between terminals 1 and 2 47 ohms N B This data applies only where detectors other than INDUSTRIAL SCIENTIFIC are used Where different types are mixed please contact INDUSTRIAL SCIENTIFIC to establish the feasibility of the combination 10 4 MARKING INDUSTRIAL SCIENTIFIC 0080 II 2 G INERIS 04 64 34 INDUSTRIAL DECLARATION DE CONFORMITE SCIENTIFIC Declaration of conformity CE ATEX 116 ind b La Soci t OLDHAM S A ZI Est 62000 Arras France atteste que le mat riel neuf The Company OLDHAM S A ZI Est 62000 Arras France declares that the following new material CENTRALE DE MESURE control unit MX42A
24. onsidered as a safety device 10 3 1 Device transfer curves in 0 to 100 LEL configuration The following curve shows the response of the device in terms of value measured and fault processing as a function of the input current value supplied by the detector Where the user connects a brand of detector other than INDUSTRIAL SCIENTIFIC to the MX42A device he must check carefully that the transfer curve is fully compatible with the device input characteristics to ensure that the data generated by the detector is correctly interpreted Equally the device must supply a suitable power supply voltage allowing for cable voltage losses Display in LEL mura 0 LEL gt EC 17 5 mm ne Fault 7 PO Signal supplied by 1 3 4 20 the detector in mA mA mA mA Please note When the value measured is gt 100 LEL the measuring device memorises the fact that the value has exceeded the scale and the channels switch to alarm and fault mode Resetting these statuses is a manual operation to be performed by the user who must follow the safety regulations specific to the site The reset is checked either by turning the device on and off or by a maintenance inspection 33 10 3 2 Device transfer curves 0 to 30 0 OXYGEN configuration The following curve shows the response of the device in terms of value measured and fault processing as a function of the input current value supplied by the detector Where the user c
25. s quickly as possible Quality provide you with products and services of the best quality accordance with current international directives and regulations Reliability and inspections To supply you with reliable equipments The quality of our production is essential to achieve reliability Quality fs ensured by extremely strict verifications carried out as soon as raw materials are received during production and at the end of manufacture all shipped equipmens are configured to meet your requirements Start up That our Ism ATEX qualified technicians will start up your equipment If you wishso This gives you the guarantee of additional safety Training Will train on risks on products and on consulting Highlights that meet your needs Maintenance contract offer you open ended maintenance contracts according to your needs 50 as to give you the guarantee of complete safety One or more visits a year comprehensive or partial warranty Renewal by tacit agreement including the adjustment of fixed or portable gas detectors the calibration of equipment and the verification of servo control systems Field servicing To send out our After Sales Service technicians quickly for servicing your site This is made possible by our efficient network in France and other countries Factory repairs We give the undertaking that any problem that cannot be solved in the field will be dealt with by the return of
26. sservissements D pannage sur site faire intervenir nos techniciens du Service Apr s Vente rapidement Ceci est possible gr ce nos implantations de proximit en France et l tranger D pannage en usine A traiter tout probl me qui ne pourrait tre r solu sur site par le renvoi du mat riel en usine Des quipes de techniciens sp cialis s seront mobilis es pour r parer votre mat riel dans les plus brefs d lais limitant ainsi au maximum p riode d immobilisation Pour toute intervention du Service Apres Vente en France un num ro Indigo a t mis en place le 0 825 842 843 NOTRE MISSION Prot ger l Homme dans ses activit s professionnelles Fournir la plus haute qualit et le meilleur service client chaque change chaque instant OUR MISSION Preserving human life on above and below the earth Delivering highest quality best customer service every transaction every time Tel 420 234 622 222 3 AMERICAS Tel 1 412 788 4353 Fax 1 412 788 8353 info indsci com AUSTRALIAINZ Tel 61 2 8870 3400 GERMANY Tel 49 231 9241 0 CZECH REPUBLIC MIDDLE EAST Tel 971 50 455 8518 ASIA PACIFIC Tel 86 10 8497 3970 Fax 86 10 8497 3971 sales isc cn com Strong points Through our customer service to respond to your needs for advice and order follow up services wherever in the world you may be answer your technical questions a
27. sts for 30 minutes Beyond that time the channel automatically changes over to fault Only one channel can be programmed at a time When a channel is in the maintenance mode the 4 20 mA current output is set to 2 mA 21 Figure 10 22 4 3 Servocontrol 4 3 1 Relays With the position of straps 53 to 512 Figure 10 the open or closed contacts of the relays can be selected on the output of the terminal blocks This selection is made by simply moving the corresponding straps As standard the relays except for the fault relay are in positive safety which means energized without an alarm 4 3 2 4 20 mA current output 4 20 mA output 1s available on the terminal block for each channel It serves to connect the MX 42 detection unit to chart recorder or to any other data acquisition system maximum load resistance 600 ohms In the event of malfunction the output is set to a current lt 1 mA In the maintenance position it is set to a current of 2 mA Note The 4 20 mA output is preset in the factory 4 mA corresponds to a display of 0 and 20 mA corresponds to a full scale value Potentiometers P5 P6 P7 and P for channels 1 2 3 and 4 respectively adjust the 4 mA Potentiometers P21 P22 P23 and P24 for channels 1 2 3 and 4 respectively adjust the 20 mA 23 SENS Figure 11 24 ZERO 4 2 lt 1 2 lt CN 2 Z lt
28. tector alarm threshold level exceeded maintenance time longer than 30 minutes 29 7 6 Control functions Accessible after removal of front panel For each channel A set of 10 microswitches Microswitch no Microswitch no Microswitch no Microswitch no Microswitch no Microswitch no Microswitch no Microswitch no Microswitch no Microswitch no 8 7 6 5 4 3 2 1 9 1 on off maintenance normal programming normal normal parking garage alarm and 2 increase decrease alarm 1 manual auto alarm 1 and 2 time delay average alarm 3 increase decrease alarm 2 and 3 time delay coding alarm 3 0 time delay coding alarm 3 Potentiometers for the adjustment of zero and sensitivity of detector Programming by keys of alarms thresholds averaging time alarm 2 7 7 Relaying Relay contacts xX X 256 straps 53 to 512 2 relays per channel for alarm 1 and alarm 2 positive safety common relay for alarm 3 or on option for remote transmission of alarm positive safety 1 common relay for malfunction negative safety for each relay choice of common closed contact or common open contact by positioning of characteristics of contact 2A 250 V AC or 30 VDC 7 8 Output of measurements 4 20 mA current outputs per channel common earth Load resistance loop maximum 600 ohms In case of fault output 1 mA In maintenance position output 2 mA 30
29. the equipment concerned to our factory Teams of specialized technicians are on hand to ensure the immediate repair of your equipment in the shortest possible time so keeping downtimes for your equipment to a minimum For any specific technical question please contact our technical support service 00 33 3 27 60 80 80 INDUSTRIAL SCIENTIFIC EUROPEAN PLANT AND OFFICES 2 1 Est rue Orfila 20417 62027 ARRAS Cedex FRANCE T l 33 3 21 60 80 80 Fax 33 3 21 60 80 00 Web site http www indsci com EUROPE Tel 33 3 21 60 80 80 Fax 33 3 21 60 80 00 info eu indsci com NETHERLANDS Tel 31 76 5427 609 SINGAPORE Tel 65 6561 7377 SWITZERLAND Tel 41 26 652 51 18 UNITED KINGDOM Tel 44 1280 706114
30. the green signal lamp channel in operation 1s off b Channel 1 is in operation inter 8 The display indicates INIT and then displays the actual measurement value and the green signal lamp channel in operation blinks the green signal lamp display is steady on During the scrutening of all channels each channel is scanned by the MX 42 every 9 seconds and the reading is held during 3 seconds On the front of the detection unit Figure 6 the keys 1 2 3 and 4 are used to display the measurements of channels 1 2 3 and 4 respectively on the common LCD display window The TEST key triggers the lighting of all signal lamps and all segments of the LCD display and the functioning of the buzzer The BUZZER key resets the alarms and clears the buzzer alarm For each channel 5 signal lamps indicate the status of the channel e adouble signal lamp Operation Display channel in operation LED green colour blinking or steady on left LED channel on display LED colour green steady on right LED display signal if channel displayed LCD window Alarm 1 signal red when alarm Alarm 2 signal red when alarm Alarm 3 signal red when alarm Fault signal malfunction on line LED colour yellow steady on e Calibration signal calibration mode LED colour yellow blinking In the event of an alarm or fault the detection unit s buzzer 1s actuated until cleared by the key BUZZER Note Th
31. uration of the channel have been damaged channel very badly adjusted adjust the channel cf V Fault signal lamp lighted reset the channel on and DEF displayed for more than 30 minutes NORMAL cf Figure 7 display SUP 100 LEL triggering concerned channel blinking NORMAL cf Figure 7 External servocontrol bad choice of relay contact move the strap to use the controlled in opposite common NO contact or the direction relation to common NC contact cf the tripping of the alarm 431 27 7 DETAILED TECHNICAL CHARACTERISTICS 7 1 Casing Casing PVC polyvinyl chloride completely shielded inside Operating temperature 10 C to 40 C Storage temperature 20 C to 55 C Relative humidity Oto 95 non condensing Tightness P54 Dimensions 340 x 300 x 107 mm length x height x depth Weight 4 75 kg Positioning wall mounted Guarantee year Function wall mounted monitoring unit for gas detection Capacity 4 channels 2 on option Measurement continuous Connection to 5 gas detectors per channel depending on type Manufacturer INDUSTRIAL SCIENTIFIC 7 2 Display Display Digital LCD Measuring scale Oto 100 0 to 300 0 to 1000 0 to 2000 Signal lamps 24 DELs see details in Section ALARM 7 3 Power supply Electrical supply accessible in casing 103 V to 122 V AC 50 60 Hz option 207 244 V AC 50 60 Hz 19 V to 32 V DC 43 to 60 V DC option Fuses 0 63
32. y at first perhaps weekly increasing the time intervals to perhaps monthly or more as confidence grows with experience in the installation concerned on the basis of the maintenance record Caution The adjustments described in this section are to be carried out by authorized personnel only since they are likely to jeopardize detection on which safety depends 5 1 Adjustment of detectors from the MX 42A detection unit Adjustment consists of calibrating the zero of the detector in pure air and the sensitivity of the detector to the reference gas For each channel use the following configuration Figure 7 Switch 8 on Switch 7 maintenance Switch 6 calibration Adjustment of detector zero Use potentiometer P9 for channel 1 P12 for channel 2 P15 for channel 3 and P18 for channel 4 Figure 11 ZERO to display OOOO on the channel in question If the ambient air is not pure inject air from a cylinder containing synthetic air 25 Adjustment of sensitivity of the detector Inject the reference gas with the calibration tube at the recommended flow rate 30 to 60 l h depending upon the detector When the reading has stablized adjust display to the value of the reference gas using potentiometer P11 for channel 1 14 for channel 2 P17 for channel 3 and P20 for channel 4 Figure 11 SENS Return to the configuration Switch 8 on Switch 7 normal Switch 6 calibration In the maintenance
Download Pdf Manuals
Related Search