OLCT 10N_rev G.1_EN
Contents
1. 118x110x63 mm IP65 UV resistant ABS 2 cable glands M16 outer diameter 4 to 8 mm Type MPI 22A 12 30V Electrochemical sensor 2 5 mA Catalytic sensor 50 mA Infrared sensor 20 mA LED red green Non intrusive and automatic with the special magnetic calibration cap or manual calibration by potentiometer Standard gas value set by the detector Certified for use in ATEX zones between 20 C and 55 C 15 to 90 RH for the electrochemical sensor 0 to 100 RH uncondensed for the catalytic sensor Electrochemical sensor 4 to 20 C 20 to 60 RH 1 bar 10 6 months maximum 4 to 20 C 10 to 60 RH 1 bar 10 6 months maximum 50 to 70 C 20 60 RH 1 bar 10 6 months maximum Infrared sensor Catalytic sensor 7 Specifications 29 Certification EMC according to EN 50270 2006 Type 1 Explosive Atmospheres Ex II 3 GD Ex nA nC IIC T4 Gc for LEL versions Ex nA IIC T4 Gc for Toxic except CO versions and O2 versions Ex te IIIC T135 C Dc 20 C lt Ta lt 55 C Sensor specifications i Average Gas Type Er Temp Range Accuracy Life T50 Too CC Expectancy sec ppm month CH4 1 LEL 100 LEL 2 4 Methane un 010799 0 70 LEL i H2 1 LEL 100 LEL 2 pi Hydrogen a E 0 70 LEL Cable 1 LEL 100 LEL 2 i Propane dl 010488 9 70 LEL i Cabo 1 LEL 0 100 LEL 20 to 55 48 Butane an 0 70 LEL CO 300 2 3 15 4 Carbon monoxide 1000 a 3 36 5 40 CO2. IEC 60079 15 2010 EN 60079 31 2009 IEC 60079 31 2008 D tecteurs de gaz combustibles OLCT 10N x IL 3 GD 20 C lt Ta lt 55 C OLCT 10N for detection of combustible gases Ex nA nC HC T4Ge Ex te IIC T135 C De IP 65 D tecteurs de gaz toxiques et de l oxyg ne OLCT 10N Ex IH 3 GD 20 C lt Ta lt 55 C OLCT 10N for detection of toxic gases and oxygen Ex nA IIC T4 Ge Ex te IIC T135 C De sauf versions CO except CO versions IP 65 D livr s par l Organisme Notifi sous le num ro 0080 INERIS rue Taffanel Issued by the Notified Boby 0080 60550 Verneuil en Halatte France I Directive Europ enne CEM_2004 108 CE du 15 12 04 Compatibilit Electromagn tique 2004 108 CE EMC European Directive dated from 15 12 2004 Electromagnetic compatibility v 5 7 Norme harmonis e appliqu e EN 50270 2006 Type 1 Harmonised European standard O x w lt S SV Arras le 17 avril 2015 April 17 2015 ALU 180 9001 200 Oldham S A S a ZI EST C S 20417 Michel Spellemacker So ia Global Director of Product Management 6 EC Declaration 27 28 OLCT 10N User Manual Chapter 7 Specifications Detector Dimensions Ingress protection Enclosure Cable entries Type of cable Power supply Consumption under normal operating conditions 24 V Status indication during calibration Calibration ATEX certification temperature Humidity Storage conditions
3. Part Numbers and Accessories Part Number Description OLCT 10N 001 OLCT 10N Digital detector range 0 100 LIE CH 5 vol OLCT 10N 002 OLCT 10N Digital detector range 0 100 LIE CH 4 4 vol OLCT 10N 003 OLCT 10N Digital detector range 0 100 LIE H 4 vol OLCT 10N 004 OLCT 10N Digital detector range 0 100 LIE C4Hio 1 5 vol OLCT 10N 005 OLCT 10N Digital detector range 0 100 LIE CHa 2 vol OLCT 10N 200 OLCT 10N Digital detector range 0 30 vol O2 OLCT 10N 204 OLCT 10N Digital detector range 0 300 ppm CO OLCT 10N 205 OLCT 10N Digital detector range 0 1000 ppm CO OLCT 10N 252 OLCT 10N Digital detector range 0 5000 ppm CO OLCT 10N 239 OLCT 10N Digital detector range 0 5 vol CO OLCT 10N 241 OLCT 10N Digital detector range 0 100 vol CO OLCT 10N 213 OLCT 10N Digital detector range 0 30 ppm HS OLCT 10N 214 OLCT 10N Digital detector range 0 100 ppm H2S OLCT 10N 216 OLCT 10N Digital detector range 0 100 ppm NO OLCT 10N 217 OLCT 10N Digital detector range 0 300 ppm NO OLCT 10N 219 OLCT 10N Digital detector range 0 10 ppm NO OLCT 10N 220 OLCT 10N Digital detector range 0 30 ppm NO OLCT 10N 231 OLCT 10N Digital detector range 0 100 ppm NH OLCT 10N 232 OLCT 10N Digital detector range 0 1000 ppm NH Accessory Description Illustration Part Number Kit containing pipe automatic Calibration kit calibration cap and gas injection Cf Page 18 6331163 tube 4 Part numbers and accesories 23 24 OLCT
4. 10 ppm 10 ppm NO 0 30 ppm 10 ppm NO Semi automatic calibration While the OLCT 10N is calibrating the MX 43 inhibits alarms triggered by the detector and displays a maintenance code Up to 32 sensors can be calibrated at the same time 16 OLCT 10N User Manual Cal ON Attachment of gas injection device Cal OFF Removal of gas injection device Normal Operating Mode START Cal ON Inject zero air Cal OFF Nitrogen in the case of an OLCT 10N O2 and wait for stabilization Zero is stable Internal processing 20 to 60 s Zeroing is complete and validated Remove the cap and apply it again within 30 seconds Cal ON Inject span gas and wait for stabilization Signal is stable Internal processing 20 to 60 s END Calibration is complete and validated Cal OFF LED sensor status 0 LED is OFF GREEN steady LED turns off as it passes or blinks as it fails Vand RED blinking PA LED turns off as it passes or blinks as it fails 3 Maintenance 17 Semi automatic calibration device P N 6331163 ee 1 6128872 1 Calibration cap support _ 2 6155771 i Magnet Ca 6225161 1 Hane Ca 6331141 1 Calibration cap 5 6002406 3 mont 6 6003205 1 mbt 18 Position magnet horizontally The calibration device with its in built magnet allows the sensor to be calibrated without opening the casing which re
5. 10N User Manual Chapter 5 Spare Parts Spare parts list for the different detectors 6798301 CO sensor 6314196 CO sensor 5000ppm range 6314195 CO sensor 5 vol range 6314197 CO sensor 100 vol range 6313990 H2S sensor 6314118 NH sensor 100 ppm range 6314119 NH sensor 1000 ppm range 6113331 NO sensor 6113332 NO sensor 6799345 O sensor 5 Spare Parts 25 26 OLCT 10N User Manual Chapter 6 EC Declaration ea d ODHA DECLARATION DE CONFORMITE CONSTRUCTEUR Manufacturer Declaration of Conformity Ce La Soci t Oldham S A S ZI Est 62000 Arras France atteste que le mat riel neuf destin tre utilis en Atmosph res Explosives d sign ci apr s The company Oldham S A S ZI Est 62000 Arras France declares that the following new material intended for use in Explosive Atmospheres D tecteur de gaz Gas detector e OLCT 10N est conforme aux exigences des Directives Europ ennes suivantes complies with the requirements of the following European Directives 1 Directive Europ enne ATEX 94 9 CE du 23 03 94 Atmosph res Explosives ATEX 94 9 CE European Directive dated from 23 03 94 Explosive Atmospheres N de l Attestation CE de type du mat riel INERIS LIATEX3023X EC Type Examination Certificate number Normes europ ennes harmonis es et internationales EN 60079 0 2009 IEC 60079 0 2007 Harmonized European and international standards EN 60079 15 2010
6. 4 OO OO nm nm nm O O0 0 0 0 00 00000 0 o oo of Of OO 0 0 1 0 4 0 4 0 1 0 4 0 4 0 1 0 4 0 O O O O Table 1 Addressing table address depends on switch positions 12 OLCT 10N User Manual Remarks m During module replacement all the configuration switches of a new module must be positioned in the same configuration as those of the previous module m Switch 6 FRAME FILLING must be set to OFF unused option m Switch 7 DELAY must be set to ON End of line resistance For the last detector set switch 8 EOL RESISTOR to ON 2 on ro vu u n Gz u ot se N LL wc Figure 5 End of line resistor switch in position ON 2 Installation 13 Scope of use The OLCT 10N may be used only with the OLDHAM MX 43 measurement and alarm controller The sensors have certain limitations it is essential to fully recognize these limitations Presence of specific components Vapor from components containing silicone or sulfur can affect the catalytic sensors and thereby distort measurements If sensors have been exposed to these types of compound inspection or calibration will be necessary High concentrations of organic solvents e g alcohols aromatic solvents etc or exposure to quantities of gas greater than the specified range of measurement can damage the electrochemical sensors Inspection or calibration is then rec
7. Ensure that the sensor is in clean air in absence of O2 in the case of OLCT 10N 02 If not inject zero air Nitrogen in the case of an OLCT 10N O2 into the sensor at a flow rate of 1 l min then wait for voltmeter signal to stabilize use the calibration gas kit zero air cylinder calibration cap tube 2 Adjust the zero with the potentiometers ZERO until the voltmeter reads 0 mV Sensitivity 1 Now inject the calibration gas 1 l min into the sensor Wait for the voltmeter signal to stabilize use the calibration gas kit calibration gas cylinder calibration cap tube 2 Adjust the sensitivity if necessary with the potentiometer SENS until the signal value in mV corresponds to the concentration in the reference gas used Use the following formula to calculate the correct value for the signal Stop injecting gas remove the calibration pipe from the sensor Wait for the voltmeter to return to zero 1600 x reference gas concentration measurement scale 20 OLCT 10N User Manual CELL CHAN FA CHANG CELLU X GND REMPLISS TRAME PEMPORISATION it OLCT 10N PF a OLCT 10N connector P N 6116291 MAINTENANCE WIRES S grey S yellow signal from 0 mV to 1600 mV for zero and sensitivity settings GND black circuit board ground VCC red power supply Note Blue and green wires are not used 3 Maintenance 21 22 OLCT 10N User Manual Chapter 4
8. consumables such as sensors filters etc Destruction of equipment European Union only This symbol indicates that in conformity with directive DEEE 2002 96 CE and in accordance with local regulations this product must not be discarded with household waste It must be disposed of in a collection area that is designated for this purpose for example at a site that is officially designated for recycling of electrical and electronic equipment EEE or a point of exchange for authorized products in the event of the acquisition of a new product of the same type 6 OLCT 10N User Manual Chapter 1 Overview Purpose The OLCT 10N is a digital detector designed to detect a particular gas depending on the type of sensor used This range of digital detectors is compatible only with the Oldham MX 43 controller Composition of the Detector Assembly An OLCT 10N detector contains the following parts Rep Description 2 Cable gland 4 Sensor 6 Gas input 8 Cover 1 Overview 7 Figure 1 Component parts of an OLCT 10N Type of detector available Gas Range Hydrogen H2 0 100 LEL 4 vol Propane C3H3 0 100 LEL 2 vol Carbone monoxide CO 0 300 ppm 0 1000 ppm Hydrogen sulfide H2S 0 30 ppm 0 100 ppm Nitrogen dioxide NO 0 10 ppm 0 30 ppm 8 OLCT 10N User Manual Chapter 2 Installation Please read the guides on the installation use and maintenanc
9. un chiffon humide CO versions are not certified to use in ATEX area 36 OLCT 10N User Manual 8 Specific instructions 37 38 OLCT 10N User Manual 8 Specific instructions 39 a OLDHAM The Fixed Gas Detection Experts EUROPEAN PLANT AND OFFICES Z Est rue Orfila CS 20417 62027 Arras Cedex FRANCE Tel 33 0 3 21 60 80 80 Fax 33 0 3 21 60 80 00 Website http www oldhamgas com ASIA PACIFIC AMERICAS Tel 86 21 3127 6373 EUROPE Tel 1 713 559 9280 Fax 86 21 3127 Tel 33 321 608 080 Fax 1 281 292 2860 6365 Fax 33 321 608 000 americas oldhamgas com sales oldhamgas com info oldhamgas com
10. 5000 18 32 Da 50 dou 9 970 vol 40 to 50 3 60 19 33 0 1 00 vol 1 3 22 H2S 30 2 3 1 Hydrogen sulfide 100 nel 3 36 5 30 30 OLCT 10N User Manual NH3 Ammonia NO Nitric oxide NOs Nitrogen dioxide O2 Oxygen 100 1000 100 300 10 30 0 30 Vol 20 to 40 20 to 50 20 to 50 20 to 50 5 ppm 20 ppm 3 3 0 4 Vol 15 22 Pia 24 36 24 28 Specifications 25 70 20 60 10 30 30 60 6 15 31 Line length use with MX 43 The following table summarizes the maximum line lengths to be used according to the cross section and number of sensors connected to a MX 43 controller TOX and O With any MX 43 mother board version Distance in meters Line cross section Number of OLCT 10N detectors used to 0 75 mm2 0 22 mm2 detect toxic gases or oxygen except CO AWG 18 AWG 24 versions 32 OLCT 10N User Manual CO MX 43 with Rev A or Rev B mother board Distance in meters Line cross section Number of OLCT 10N detectors used to 0 75 mm 0 5 mm2 0 22 mm2 detect CO AWG 18 AWG 20 AWG 24 1000 1000 1000 Maximum load for an MX 43 line gt 500mA Above 12 An external supply must be used MX 43 with Rev C mother board Distance in meters Line cross section Number of OLCT 10N detectors used to 0 75 mm 0 5 mm2 0 22 mm detect CO AWG 18 AWG 20 AWG 24 Maximum load for an MX 43 line gt 1200mA Above 30 An external sup
11. FAN OM ets acatist a st c nai a i ae ct 20 Chapters Spare PAS ot Dania ea iai inu ao mite aa ina Baal 25 Chapter 6 EC Declaration 27 Chapter 7 Specifications ss 29 DOT OC LON ezitat siana anca du cs basc nt o aula ce mat tbe 29 SENSOL SDPECHIEANON Sansa 30 Line length use with MX 43 c eee eee eee oaeeee 32 Chapter 8 Specific instructions for use in explosive atmospheres in accordance with European ATEX Directive 949 ER Pe SEE SRE REP ie aa citeai d blanita iati EEE 35 General COMMENS is ac ae de i ana d ati ai 35 Marking TOR LEE VErSIONnSs za caca a notate ia ac na a ee i cau 35 Marking for toxic gas or oxygen detector versions eee 36 Thank you for choosing this OLDHAM instrument All necessary actions have been taken to ensure your complete satisfaction with this equipment It is important that you read this entire manual carefully and thoroughly Limitation of Liability OLDHAM shall not be held responsible for any damage to the equipment or for any physical injury or death resulting in whole or in part from the inappropriate use or installation of the equipment non compliance with any and all instructions warnings standards and or regulations in force No business person or legal entity may assume responsibility on behalf of OLDHAM even though they may be involved in the sale of OLDHAM products OLDHAM shall not be responsible for any direct or i
12. User Manual OLCT 10N Digital Gas Detector Part Number NPO10NEN Version G 1 The Fixed Gas Detection Experts Copyright 2015 by OLDHAM S A S May 2015 All rights reserved No reproduction of all or pari of this document in any form is permitted without the written consent of OLDHAM S A S All information provided in this document is accurate to the best of our knowledge As a result of continuous research and development the specifications of this product may be changed without prior notice OLDHAM S A S Rue Orfila Z I Est CS 20417 F 62027 ARRAS Cedex Tel 33 0 3 21 60 80 80 Fax 33 0 3 21 60 80 00 2 OLCT 10N User Manual Contents Chapter 1 Overview nnnneennnnennannnnnnnunnnnnnnnnnunnannnnnnnunnannnnnnnenn 7 PUNOS O else nant nie ban dentelle 7 Composition of the Detector Assembly 7 Type of detector available c eee nenn 8 Chapter 2 Installation se ince sei coala cau ee 9 Regulations and conditions Of use 9 Seal on OHNE dEIECIAR NR RI ei ee PR NE RR E RI RA 9 Detector DOS HOME ie Caci ina za o td na d at ul baza 9 CONNEC ION seic paiete Bazata Stiai indici aa ua a 10 Configuration Of communication e eee 12 SCOPE OPUS coca te jaa it eta tota tail Lama So alele a atat p deea la a 14 Chapter 3 Maintenance 15 Maintenance Frequency 15 Semi automatic calibration 16 Sensor replacement ss 18 WIS SAUD
13. alled Refer to European ATEX Directive 1999 92 EC on minimum requirements for improving the safety and health protection of workers potentially at risk from explosive atmospheres OLCT 10N detectors also comply with the requirements of the IECEx international certification scheme relating to Gas and Dust explosive atmospheres Marking for LEL versions The marking will be as follows OLDHAM Arras OLCT 10N EXPLO CE Ex 1 3 GD Ex nA nC IIC T4 Ge Ex tc IIIC T135 C Dc IP 65 Amb Temp 20 C to 55 C INERIS 11ATEX3023X IECEx INE 11 0029X Warning Do not open when an explosive atmosphere may be present Potential electrostatic charge hazard Polish or wipe only with damp cloth 8 Specific instructions 35 Avertissement Ne pas ouvrir si une atmosph re explosive peut tre pr sente Danger potentiel de charges lectrostatiques Ne frotter ou n essuyer qu avec un chiffon humide Marking for toxic gas or oxygen detector versions The marking will be as follows OLDHAM Arras OLCT 10N TOX CE x 13 GD Ex nA IIC T4 Gc Ex tc IIIC T135 C Dc IP 65 Amb Temp 20 C to 55 C INERIS 11ATEX3023X IECEx INE 11 0029X Warning Do not open when an explosive atmosphere may be present Potential electrostatic charge hazard Polish or wipe only with damp cloth Avertissement Ne pas ouvrir si une atmosphere explosive peut tre pr sente Danger potentiel de charges lectrostatiques Ne frotter ou n essuyer qu avec
14. e line This simply involves switch 8 being moved to the ON position on the last module cf Fig 5 No portion of the bare end of the terminal wires should be visible For protection against any electromagnetic disturbances the data as well as screen wires or braids must be cut as short as possible Before connecting the detector to the control unit please disable any installation alarms to avoid unexpected triggering during operation with the power off The site should be at equal potential AP The connection of the cable between the detector and controller should be made Ground terminal Connection is made according to the following schematic Controller line terminal Detector terminal Figure 3 Schematic for connecting modules on a MX 43 line 2 Installation 11 Configuration of communication Module address All the digital modules on a line must be identified by a unique address ON ON s ON ON ON ON Switches 1 to 5 of the configuration block of cri each module make it possible to establish an address number 1 to 32 in binary mode In the illustration to the right the address 9 10010 has been defined The Addressing Table below lists the possible combinations Figure 4 Switches for address configuration zz m SLAVE NUMBER NUMERO ESCLAVE Switches Switches ON 1 OFF 0 ON 1 0FF 0 Address module a ONOahadAN O O OO OO OO O OO OO O O O dan
15. e of flammable gas and oxygen detectors standard EN IEC 60079 29 2 and toxic gas detectors standard EN 45544 4 Regulations and conditions of use Where applicable the installation should meet all the regulations currently in force for installations in explosive atmospheres in particular standards IEC EN 60079 14 and IEC EN 60079 17 current editions Generally speaking the ambient temperatures supply voltages and power outputs that are mentioned in this document relate to explosion safety They do not relate to the detector s operating temperatures The equipment is authorized for use in ATEX zones 2 and 22 at ambient temperatures between 20 C and 55 C The sensor in the transmitter should always be in contact with ambient air Therefore Do not cover the detector Do not paint the detector Avoid dust The OLCT 10N may be used only with the OLDHAM MX 43 measurement and alarm controller CO versions are not certified to use in ATEX area Location of the detector Depending on the density of the gas to be detected or the application the detector shall be positioned at ground level or on the ceiling at the same height as the airflow or near air extraction ducis Heavy gases may be detected at the ground level while light gases will be found at ceiling height Detector positioning The detectors shall preferably be positioned in an accessible p
16. lace to facilitate inspection and maintenance as well as ensure the safety of the operators The detectors shall be protected against shock hazards and must not be obstructed by 2 Installation 9 anything that will prevent them from measuring the ambient environment for which they are intended The detector shall be installed with the cable gland pointing downwards If installed at an angle of more than 45 from the vertical or in a horizontal position ceiling type installation the detector will not measure correctly and will need to be re calibrated Figure 2 OLCT 10N dimensions in millimeters Connection As a reminder the OLCT 10N can only be connected to the OLDHAM MX 43 controller RS485 transmission The OLCT 10N has 2 cable glands that are used for the input cable and the output cable to the next module The detectors must be connected using MPI 22A cable type minimum core size is 0 22 mm RS485 cable with 2 shielded twisted pairs nominal impedance of 100 Ohm This cable carries the RS485 signal on one pair and the power supply for the modules on the other pair The 24VDC OV A and B terminals are respectively connected to the 24VDC OV A and B terminals of the other 10 OLCT 10N User Manual modules in the line and then to the corresponding line connector of the MX 43 controller The cable shielding must be connected to a ground terminal The 120 Q end of line resistor must be placed at the end of th
17. ndirect damage or any direct or indirect consequence resulting from the sale and use of any of its products UNLESS SUCH PRODUCTS HAVE BEEN SELECTED BY OLDHAM ACCORDING TO THE APPLICATION Ownership clauses 4 The drawings specifications and information herein contain confidential information that is the property of OLDHAM This information shall not either in whole or in part by physical electronic or any other means whatsoever be reproduced copied divulged translated or used as the basis for the manufacture or sale of OLDHAM equipment or for any other reason without the prior written consent of OLDHAM OLCT 10N User Manual Warnings This is not a contractual document OLDHAM reserves the right to alter the technical features of its equipment at any time and for any reason without prior notice READ THESE INSTRUCTIONS CAREFULLY BEFORE USING FOR THE FIRST TIME these instructions should be read by all persons who have or will have responsibility for the use maintenance or repair of the instrument This instrument shall only be deemed to be in conformance with the published performance if used maintained and repaired in accordance with the instructions of OLDHAM by OLDHAM personnel or by personnel authorized by OLDHAM Warranty Under normal conditions of use and on return to the factory parts and workmanship are guaranteed for 2 years excluding
18. ommended In the presence of high concentrations of carbon dioxide CO gt 1 vol the oxygen measuring electrochemical sensors can slightly overestimate the concentration of oxygen 0 1 to 0 5 vol O2 overestimate Operation under low oxygen levels If an electrochemical sensor is used in an atmosphere containing less than 1 vol oxygen for over one hour the measurement may be an underestimate If a catalytic sensor is used in an atmosphere containing less than 10 vol oxygen the measurement may be an underestimate 14 OLCT 10N User Manual Chapter 3 Maintenance Maintenance primarily involves sensor calibration and changing any sensors that no longer meet their initial performance characteristics Since they are liable to affect detection reliability the tasks described in this chapter are reserved for authorized trained personnel only Inspection and maintenance shall be carried out in accordance with standard EN IEC 60079 17 The instructions contained in the ATEX marking shall be observed see Chapter 8 When first powered up or after a sensor replacement wait for 1 hour before performing a calibration It is impossible to calibrate an OLCT 10N within 10 minutes after a power cycle Maintenance Frequency Gas detectors are safety devices OLDHAM recommends the regular testing of fixed gas detection installations This type of test consists of injecting the calibra
19. ply must be used 7 Specifications 33 Catalytic MX 43 with Rev A or Rev B mother board Distance in meters Line cross section Number of OLCT 10N detectors equipped 0 75 mm 0 5 mm 0 22 mm with a catalytic sensor LEL versions AWG 18 AWG 20 AWG 24 Maximum load for an MX 43 line gt 500mA An external supply must be used MX 43 with Rev C mother board Distance in meters Line cross section Number of OLCT 10N detectors equipped 0 75 mm 0 5 mm 0 22 mm with a catalytic sensor LEL versions AWG 18 AWG 20 AWG 24 450 300 350 250 300 200 9 3 Maximum load for an MX 43 line 1200mA Above 13 y An external supply must be used 34 OLCT 10N User Manual Chapter 8 Specific instructions for use in explosive atmospheres in accordance with European ATEX Directive 94 9 EC General comments OLCT 10N detectors comply with the requirements of European ATEX Directive 94 9 EC on Gas and Dust explosive atmospheres OLCT 10N transmitter detectors are used to measure certain explosive or toxic gases or oxygen They can be installed in ATEX zones 2 or 22 except for CO versions which should be installed in safe area only The equipment passed a mechanical shock test for low risk conditions and therefore must be protected against shock hazards in ATEX zones The information given in the following sections should be taken into account and observed by the manager of the site where the equipment is inst
20. presents a considerable time saving However traditional calibration using zero and sensitivity potentiometers is possible by opening the sensor casing OO Inject gas at rate of 60 I hr OLCT 10N User Manual Sensor replacement Sensors should be replaced as a part of regular preventative maintenance or following a failed calibration test After a sensor replacement both manual and automatic calibrations must to be conducted To change the sensor 1 Remove the detector cover 2 Push and hold down the sensor replacement button 1 for 5 seconds until the solid green LED 2 is on 3 Release the button 4 Replace the sensor and conduct both manual and automatic calibrations This is a mandatory step Figure 6 Sensor replacement In order to comply with the ATEX rules the sensor of LEL detectors is soldered to the card and cannot be changed separately The entire OLCT 10N detector will need to be replaced As the detector is factory calibrated there is no point attempting manual calibration However a sensor change must be declared using the maintenance menu of the MX 43 controller see MX 43 manual 3 Maintenance 19 Manual calibration A voltmeter and the female connector provided by Oldham P N 6116291 are required 1 Remove the detector cover 2 Connect the connector to the circuit s male connector 3 Connect the voltmeter between S and S value in mV Zero the sensor
21. tion gas into the detector at a sufficient concentration to activate the pre set alarms It is to be understood that this test is in no way a replacement for a detector calibration The frequency of gas tests depends on the industrial application where the detector is in use Frequent inspections should be made in the months following the commissioning of the installation and should then become more widely spaced provided that no significant deviation is observed If a detector should fail to react in contact with the gas calibration is essential The frequency of calibrations shall be appropriate according to the results of the tests humidity temperature dust etc however it must not exceed one year The general manager should put safety procedures in place on site OLDHAM cannot be held responsible for their enforcement 3 Maintenance 15 The OLCT 10N can be calibrated either Manually Automatically detector replacement A manual calibration must be followed by an automatic calibration Please find below the different calibration gas concentrations N The manual calibration must be done only after each sensor or Calibration gas concentration Hydrogen H2 0 100 LEL 2 0 H Air 50 LEL Propane C3Heg 0 100 LEL 1 1 CsHe Air 55 LEL Carbone monoxide CO 0 300 ppm 100 ppm CO 0 1000 ppm 300 ppm CO Hydrogen sulfide H2S 0 30 ppm 25 ppm H S 0 100 ppm 25 ppm H S Nitrogen dioxide NO 0
Download Pdf Manuals
Related Search