Approvals, Certificates and Conditions

PROCESS ANALYSERS SERVOTOUGH SpectraExact (2500 series) Process Gas Analysers Approvals, Certificates and Conditions Part Number: Revision: Language: 02500008C 4 UK English

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CONTENTS 1 INTRODUCTION 2 ATEX CATEGORY 3 APPROVAL FOR USE IN ZONE 2 AREAS (Gases) ATEX CATEGORY 2 APPROVAL FOR USE IN ZONE 21 AREAS (Dusts) 3 IECEx APPROVAL FOR USE IN AREAS THAT REQUIRE EPL Gc (Gases) IECEx APPROVAL FOR USE IN AREAS THAT REQUIRE EPL Db (Dusts) 4 FM DIV II / ZONE 2 APPROVAL 5 ATEX CATEGORY 2 APPROVAL FOR USE IN ZONE 1 AREAS (Gases) 6 IECEx APPROVAL FOR USE IN AREAS THAT REQUIRE EPL Gb (Gases)

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SECTION 1 INTRODUCTION The 2500 series of analysers (2500,2510,2520,2550) have been approved by various authorities for installation in hazardous areas. The certification offered with a specific analyser will depend upon the analyser specification and country of delivery. See the certification labels attached to the analyser for approval details. The different sections of this manual contain copies of the approval certificates obtained. The installer and/or the user of the analyser must be satisfied that the installation complies with any Special Conditions for Safe Use or Schedule of Limitations contained in the following Certificates. If the analyser is installed in a hazardous area then electrical power and other connecting cables should be installed and protected according to conditions on the relevant certificates, national wiring regulations, hazardous area codes of practice and local authority regulations.

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SECTION 2 ATEX Category 3 Approval for use in Zone 2 areas (Gases) ATEX Category 2 Approval for use in Zone 21 areas (Dusts) 2500 Series - EU2 The 2500 series EU2 instruments (2500, 2510, 2520 and 2550) have been certified as Ex n in accordance with EN 60079-0:2009, EN 60079-15:2005, and are suitable for use in zone 2 or areas that require EPL Gc. ATEX Marking: Code: II 3G Ex na nc nl IIC T4 Gc (Tamb = -10ºC to +55ºC) for cell temperatures up to 80º C. Ex na nc nl IIC T3 Gc (Tamb = -10ºC to +55ºC) for cell temperatures up to 130º C. Certificate No.: Sira 10ATEX4015X/1 (Gases) The 2500 series EU2 instruments (2500, 2510, 2520 and 2550) have also been certified as Ex tb in accordance with EN 60079-0:2009, IEC 60079-31:2008, and are suitable for use in zone 21 or areas that require EPL Db. ATEX Marking: Code: II 2D Ex tb IIIB T80ºC Db IP6X (Tamb = -10ºC to +55ºC) for unheated cell Ex tb IIIB T125ºC Db IP6X (Tamb = -10ºC to +55ºC) for cell temperatures up to 80º C. Ex tb IIIB T175ºC Db IP6X (Tamb = -10ºC to +55ºC) for cell temperatures up to130º C. Certificate No.: Sira 10ATEX9016X/1 (Dusts) Special condition of these certificates is: To avoid propagating brush discharges, the unit is not to be installed in a high velocity dust-laden atmosphere.

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CERTIFICATION 1 TYPE EXAMINATION CERTIFICATE 2 Equipment intended for use in Potentially Explosive Atmospheres Directive 94/9/EC 3 Certificate Number: Sira 10ATEX4015X Issue: 1 4 Equipment: 2500 Series Analyser 5 Applicant: Servomex Group Limited 6 Address: Jarvis Brook Crowborough East Sussex TN6 3FB UK 7 This equipment and any acceptable variation thereto are specified in the schedule to this certificate and the documents therein referred to. 8 Sira Certification Service certifies that this equipment has been found to comply with the Essential Health and Safety Requirements that relate to the design of Category 3 equipment, which is intended for use in potentially explosive atmospheres. These Essential Health and Safety Requirements are given in Annex II to European Union Directive 94/9/EC of 23 March 1994. The examination and test results are recorded in the confidential reports listed in Section 14.2. 9 Compliance with the Essential Health and Safety Requirements, with the exception of those listed in the schedule of this certificate, has been assessed by reference to: EN 60079-0:2009 EN 60079-15:2005 10 If the sign X is placed after the certificate number, it indicates that the equipment is subject to special conditions for safe use specified in the schedule to this certificate. 11 This TYPE EXAMINATION CERTIFICATE relates only to the design of the specified equipment, and not to specific items of equipment subsequently manufactured. 12 The marking of the equipment shall include the following: II 3G Notes Ex na nc nl IIC T4 Gc For unheated cells and heated cell up to 120 C Ex na nc nl IIC T3 Gc For heated cell up to 170 C Ta = -10 C to +55 C Project Number 22489 D R Stubbings BA MIET C. Index 14 Certification Manager This certificate and its schedules may only be reproduced in its entirety and without change. Form 9402 Issue 2 Page 1 of 3 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

CERTIFICATION SCHEDULE TYPE EXAMINATION CERTIFICATE Sira 10ATEX4015X Issue 1 13 DESCRIPTION OF EQUIPMENT The 2500 IR Optical Bench is an industrial spectrophotometer measuring concentrations of fluids in the infrared or visible regions of the spectrum. The components of the system are, a hot body to provide a radiation source (440 µw), an optical chopper and motor housed in a chopper box, a sample cell, a detector and associated electronics. The electronics are housed in two cast aluminium boxes, one at each end of the sample cell. A duct connects these two boxes this duct acts as a chassis and carries cabling. Each of the end boxes has a hinged lid. The sample cell length varies with application. The end box containing the radiation source and optical chopper also contains an electronics assembly (power control board) to drive the radiation source, chopper motor, chopper box heater, an optional barometric pressure sensor, an optional sample cell heater and calibration/sample switching solenoid valves. The solenoid valves do not form part of the equipment. Attached to the side of the end box, via two standoffs, is a mains filter unit. The end box containing the detector assembly also contains a mains transformer and an electronics assembly (transmitter board), for signal processing, into which plugs a switch mode power converter. The detector assembly includes a pre-amplifier. A microprocessor board, a sensor/interface board, a keypad and a display are mounted on the 2500 Optical Bench and into the transmitter board. The keypad and display are mounted on the hinged lid. An optional output board may be also fitted to the transmitter board and provides two volt free relay contacts and two isolated current/voltage outputs. The keypad and associated circuit is intrinsically safe. The design of the equipment may be modified by the addition of a gas filter adapter PCB or multicomponent adaptor, the equipment type number becomes 2510 or 2550 when these boards are used. Variation 1 - This variation introduced the following changes: i. The introduction of the Communication board 02500862 to the equipment was recognised. ii. The introduction of a sealed UV/VIS light source to create a 2520 variant in the equipment was approved. 14 DESCRIPTIVE DOCUMENTS 14.1 Drawings Refer to Certificate Annexe. 14.2 Associated Sira Reports and Certificate History Issue Date Report number Comment 0 29 June 2010 R218228A/00 The release of the prime certificate. 1 27 October 2010 R22849A/00 The introduction of Variation 1. 15 SPECIAL CONDITIONS FOR SAFE USE 15.1 Precautions shall be taken to avoid the risk of electrostatic discharge or propagating brush discharges, see user instructions. This certificate and its schedules may only be reproduced in its entirety and without change. Form 9402 Issue2 Page 2 of 3 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

CERTIFICATION SCHEDULE TYPE EXAMINATION CERTIFICATE Sira 10ATEX4015X Issue 1 16 ESSENTIAL HEALTH AND SAFETY REQUIREMENTS (EHSRs) The relevant EHSRs that are not addressed by the standards listed in this certificate have been identified and individually assessed reports listed in Section 14.2. 17 CONDITIONS OF CERTIFICATION 17.1 The use of this certificate is subject to the Regulations Applicable to Holders of Sira Certificates. 17.2 Holders of Type Examination Certificates are required to comply with the production control requirements defined in Article 8 of directive 94/9/EC. 17.3 The manufacturer shall carry out a routine electric strength test on all units manufactured, in accordance with EN 60079-15:2005 clause 34.2.1 and 6.8.1, the test to be carried out on the following parts. There shall be no breakdown: Power control board, plug PL3 pin 5 tested to pin 2 and 3 at (1500 +75, -0) V rms. Heater assembly between all connections and earth at (1500 +75, -0) V rms for the 110V, 60V and 30V heater supplies. Mains Transformers a. All primary windings connected together and tested to the shield at (1500 +75, -0) V rms b. All secondary windings connected together and tested to the shield at (1500 +75, -0) V rms. c. All secondary windings for the heater supply only connected together and tested to the interconnection of the remaining secondaries at (1500 +75, -0) V rms. d. The line and neutral of the PSU primary connected together and tested to the interconnection of the PSU secondary connections and earth at (1500 +75, -0) V rms. This certificate and its schedules may only be reproduced in its entirety and without change. Form 9402 Issue2 Page 3 of 3 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

Certificate Annexe Certificate Number: Equipment: Applicant: Sira 10ATEX4015X 2500 Series Analyser Servomex Group Limited CERTIFICATION Issue 0 Drawing No. Sheets Rev. Date (Sira stamp) Title 00100/850/0 1 of 1 0 29 Jun 10 Approval, Alternative rating/serial number label 01210/851/0 1 to 2 0 29 Jun 10 Assembly, motor controller 01210/851X/0 1 of 1 0 29 Jun 10 Circuit diagram, motor controller 01210/851Y/0 1 of 1 0 29 Jun 10 Layer B artwork, motor controller 01210/851Z/0 1 of 1 0 29 Jun 10 Layer A artwork, motor controller 02000/854C/1 1 to 4 1 29 Jun 10 Circuit diagram, Sensor interface PCB 02000/854D/2 1 to 5 2 29 Jun 10 Component layout, Sensor head interface PCB 02000/862/0 1 of 1 0 29 Jun 10 Component layout, 68k Processor PCB 02000/862V/0 1 of 1 0 29 Jun 10 Layer C, 68k Processor PCB 02000/862W/0 1 of 1 0 29 Jun 10 Layer B, 68k Processor PCB 02000/862X/0 1 to 2 0 29 Jun 10 Circuit diagram, 68k Processor PCB 02000/862Y/0 1 of 1 0 29 Jun 10 Layer D, 68k Processor PCB 02000/862Z/0 1 of 1 0 29 Jun 10 Layer A, 68k Processor PCB 02000/865/0 1 to 2 0 29 Jun 10 General assembly, power supply unit 02000/865X/0 1 to 3 0 29 Jun 10 Circuit diagram, power supply unit 02000/865Y/0 1 of 1 0 29 Jun 10 Layer A artwork, power supply unit 02000/865Z/0 1 of 1 0 29 Jun 10 Layer B artwork, power supply unit 02000/872/2 1 of 1 2 29 Jun 10 VFD Module 02000/885/1 1 of 1 1 29 Jun 10 Transformer details 02500/854A/4 1 & 2 4 29 Jun 10 Circuit diagram, Transmitter PCB 02500/854B/2 1 to 4 2 29 Jun 10 Component layout, Transmitter PCB 02500/855A/2 1 of 1 2 29 Jun 10 Circuit diagram, detector PCB 02500/855B/2 1 to 3 2 29 Jun 10 General assembly, detector PCB 02500/856A/2 1 of 1 2 29 Jun 10 Circuit diagram, motor connection PCB 02500/856B/2 1 to 3 2 29 Jun 10 Assembly, motor connection PCB 02500/861A/4 1 of 1 4 29 Jun 10 Circuit diagram, Power control PCB 02500/861B/2 1 to 3 2 29 Jun 10 Component layout, Power control PCB 02500/861C/1 1 of 1 1 29 Jun 10 Heatsink assembly, Power control PCB 02500/873A/1 1 of 1 1 29 Jun 10 Transformer, 120/240 02500/873B/1 1 of 1 1 29 Jun 10 Transformer, 100/200 02500/874A/2 1 of 1 2 29 Jun 10 Chopper box wiring diagram 02501/853/1 1 of 1 1 29 Jun 10 PCB Assembly 02501/853X/1 1 of 1 1 29 Jun 10 Circuit diagram 02501/853Y/1 1 of 1 1 29 Jun 10 PCB Layer B 02501/853Z/1 1 of 1 1 29 Jun 10 PCB Layer A 02501/855/0 1 of 1 0 29 Jun 10 General assembly, detector PCB 02501/855V/0 1 of 1 0 29 Jun 10 Layer B, detector PCB 02501/855W/0 1 of 1 0 29 Jun 10 Layer C, detector PCB 02501/855X/0 1 of 1 0 29 Jun 10 Circuit diagram, detector PCB 02501/855Y/0 1 of 1 0 29 Jun 10 Layer D, detector PCB 02501/855Z/0 1 of 1 0 29 Jun 10 Layer A, detector PCB 02501/871/0 1 of 1 0 29 Jun 10 Keypad assembly 02501/871D/0 1 of 1 0 29 Jun 10 Sealed source details 02501/872A/0 1 of 1 0 29 Jun 10 General assembly, Optical bench 02501/872B/0 1 to 2 0 29 Jun 10 Sealing details, Optical bench 02501/872C/0 1 of 1 0 29 Jun 10 Connection details, Optical bench This certificate and its schedules may only be reproduced in its entirety and without change. Form 9402 Issue 2 Page 1 of 2 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

Certificate Annexe Certificate Number: Equipment: Applicant: Sira 10ATEX4015X 2500 Series Analyser Servomex Group Limited CERTIFICATION Drawing No. Sheets Rev. Date (Sira stamp) Title 02501/872N/0 1 to 2 0 29 Jun 10 Label details, Optical bench Ex n 02501/872Q/0 1 of 1 0 29 Jun 10 Mains Filter Unit Approval 02501/873A/0 1 of 1 0 29 Jun 10 Electric heated cell, 1 to 64mm path 02501/873B/0 1 of 1 0 29 Jun 10 Electric heated cell, 128 to l000mm path 02501/873C/0 1 of 1 0 29 Jun 10 Cell Sealing Details Approval 02501/874D/0 1 of 1 0 29 Jun 10 Power distribution diagram 02501/876D/0 1 of 1 0 29 Jun 10 General assembly, short wave source 02501/880/0 1 of 1 0 29 Jun 10 Pressure compensation details 02501/882/0 1 of 1 0 29 Jun 10 Alternative fuse encapsulation 02510/851A/2 1 of 1 2 29 Jun 10 Circuit diagram, gas filter adaptor PCB 02510/851B/2 1 to 3 2 29 Jun 10 Assembly, gas filter adaptor PCB 02520/851A/2 1 of 1 2 29 Jun 10 Circuit diagram, UV/VIS detector PCB 02520/851B/1 1 to 3 1 29 Jun 10 General assembly, UV/VIS detector PCB 02550/851A/1 1 of 1 1 29 Jun 10 Circuit diagram, multicomponent adaptor PCB 02550/851B/1 1 to 3 1 29 Jun 10 Assembly, multicomponent adaptor PCB Issue 1 Drawing No. Sheets Rev. Date (Sira stamp) Title 02500/862/0 1 of 1 0 02 Sep 10 Circuit diagram, Communications board PCB 02500/862X/0 1 of 1 0 02 Sep 10 Assembly details, Communications board PCB 02520/876L/0 1 of 1 0 19 Oct 10 UV/VIS light source 02501/872N/0 1 to 2 1 02 Sep 10 Label details, Optical bench Ex n This certificate and its schedules may only be reproduced in its entirety and without change. Form 9402 Issue 2 Page 2 of 2 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

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CERTIFICATION 1 EC TYPE-EXAMINATION CERTIFICATE 2 Equipment intended for use in Potentially Explosive Atmospheres Directive 94/9/EC 3 Certificate Number: Sira 10ATEX9016X Issue: 1 4 Equipment: 2500 Series Analyser 5 Applicant: Servomex Group Limited 6 Address: Jarvis Brook Crowborough East Sussex TN6 3FB UK 7 This equipment and any acceptable variation thereto is specified in the schedule to this certificate and the documents therein referred to. 8 Sira Certification Service, notified body number 0518 in accordance with Article 9 of Directive 94/9/EC of 23 March 1994, certifies that this equipment has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of equipment intended for use in potentially explosive atmospheres given in Annex II to the Directive. The examination and test results are recorded in the confidential reports listed in Section 14.2. 9 Compliance with the Essential Health and Safety Requirements, with the exception of those listed in the schedule to this certificate, has been assured by compliance with the following documents: EN 60079-0:2009 IEC 60079-31:2008 10 If the sign X is placed after the certificate number, it indicates that the equipment is subject to special conditions for safe use specified in the schedule to this certificate. 11 This EC type-examination certificate relates only to the design and construction of the specified equipment. If applicable, further requirements of this Directive apply to the manufacture and supply of this equipment. 12 The marking of the equipment shall include the following: II 2D Notes Ex tb IIIC* T80 C Db IP6X For unheated cell Ex tb IIIC* T125 C Db IP6X For heated cell up to 120 C Ex tb IIIC*T175 C Db IP6X For heated cell up to 170 C Ta = -10 C to +55 C *Equipment may also be marked IIIB to eliminate conductive dusts Project Number 22849 D R Stubbings BA MIET C. Index 14 Certification Manager This certificate and its schedules may only be reproduced in its entirety and without change. Form 9400 Issue 1 Page 1 of 3 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

CERTIFICATION SCHEDULE EC TYPE-EXAMINATION CERTIFICATE Sira 10ATEX9016X Issue 1 13 DESCRIPTION OF EQUIPMENT The 2500 IR Optical Bench is an industrial spectrophotometer measuring concentrations of fluids in the infrared or visible regions of the spectrum. The components of the system are, a hot body to provide a radiation source (440 µw), an optical chopper and motor housed in a chopper box, a sample cell, a detector and associated electronics. The electronics are housed in two cast aluminium boxes, one at each end of the sample cell. A duct connects these two boxes this duct acts as a chassis and carries cabling. Each of the end boxes has a hinged lid. The sample cell length varies with application. The end box containing the radiation source and optical chopper also contains an electronics assembly (power control board) to drive the radiation source, chopper motor, chopper box heater, an optional barometric pressure sensor, an optional sample cell heater and calibration/sample switching solenoid valves. The solenoid valves do not form part of the equipment. Attached to the side of the end box, via two standoffs, is a mains filter unit. The end box containing the detector assembly also contains a mains transformer and an electronics assembly (transmitter board), for signal processing, into which plugs a switch mode power converter. The detector assembly includes a pre-amplifier. A microprocessor board, a sensor/interface board, a keypad and a display are mounted on the 2500 Optical Bench and into the transmitter board. The keypad and display are mounted on the hinged lid. An optional output board may be also fitted to the transmitter board and provides two volt free relay contacts and two isolated current/voltage outputs. The keypad and associated circuit is intrinsically safe. The design of the equipment may be modified by the addition of a gas filter adapter PCB or multicomponent adaptor, the equipment type number becomes 2510 or 2550 when these boards are used. Variation 1 - This variation introduced the following changes: i. The introduction of the Communication board 02500862 to the equipment was endorsed. ii. The introduction of a sealed UV/VIS light source to create a 2520 variant in the equipment was approved. iii. The alternative markings for Category 2D, allowing the marking of IIIB as an alternative to IIIC were recognised. 14 DESCRIPTIVE DOCUMENTS 14.1 Drawings Refer to Certificate Annexe. 14.2 Associated Sira Reports and Certificate History Issue Date Report number Comment 0 29 June 2010 R18228A/00 The release of the prime certificate. 1 27 October 2010 R22849A/00 The introduction of Variation 1. This certificate and its schedules may only be reproduced in its entirety and without change. Form 9400 Issue1 Page 2 of 3 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

CERTIFICATION SCHEDULE EC TYPE-EXAMINATION CERTIFICATE Sira 10ATEX9016X Issue 1 15 SPECIAL CONDITIONS FOR SAFE USE (denoted by X after the certificate number) 15.1 Precautions shall be taken to avoid the risk of electrostatic discharge or propagating brush discharges, see user instructions. 16 ESSENTIAL HEALTH AND SAFETY REQUIREMENTS OF ANNEX II (EHSRs) The relevant EHSRs that are not addressed by the standards listed in this certificate have been identified and individually assessed in the reports listed in Section 14.2. 17 CONDITIONS OF CERTIFICATION 17.1 The use of this certificate is subject to the Regulations Applicable to Holders of Sira Certificates. 17.2 Holders of EC type-examination certificates are required to comply with the production control requirements defined in Article 8 of directive 94/9/EC. This certificate and its schedules may only be reproduced in its entirety and without change. Form 9400 Issue1 Page 3 of 3 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

Certificate Annexe Certificate Number: Equipment: Applicant: Sira 10ATEX9016X 2500 Series Analyser Servomex Group Limited CERTIFICATION Issue 0 Drawing No. Sheets Rev. Date (Sira stamp) Title 00100/850/0 1 of 1 0 29 Jun 10 Approval, Alternative rating/serial number label 01210/851/0 1 to 2 0 29 Jun 10 Assembly, motor controller 01210/851X/0 1 of 1 0 29 Jun 10 Circuit diagram, motor controller 01210/851Y/0 1 of 1 0 29 Jun 10 Layer B artwork, motor controller 01210/851Z/0 1 of 1 0 29 Jun 10 Layer A artwork, motor controller 02000/854C/1 1 to 4 1 29 Jun 10 Circuit diagram, Sensor interface PCB 02000/854D/2 1 to 5 2 29 Jun 10 Component layout, Sensor head interface PCB 02000/862/0 1 of 1 0 29 Jun 10 Component layout, 68k Processor PCB 02000/862V/0 1 of 1 0 29 Jun 10 Layer C, 68k Processor PCB 02000/862W/0 1 of 1 0 29 Jun 10 Layer B, 68k Processor PCB 02000/862X/0 1 to 2 0 29 Jun 10 Circuit diagram, 68k Processor PCB 02000/862Y/0 1 of 1 0 29 Jun 10 Layer D, 68k Processor PCB 02000/862Z/0 1 of 1 0 29 Jun 10 Layer A, 68k Processor PCB 02000/865/0 1 to 2 0 29 Jun 10 General assembly, power supply unit 02000/865X/0 1 to 3 0 29 Jun 10 Circuit diagram, power supply unit 02000/865Y/0 1 of 1 0 29 Jun 10 Layer A artwork, power supply unit 02000/865Z/0 1 of 1 0 29 Jun 10 Layer B artwork, power supply unit 02000/872/2 1 of 1 2 29 Jun 10 VFD Module 02000/885/1 1 of 1 1 29 Jun 10 Transformer details 02500/854A/4 1 & 2 4 29 Jun 10 Circuit diagram, Transmitter PCB 02500/854B/2 1 to 4 2 29 Jun 10 Component layout, Transmitter PCB 02500/855A/2 1 of 1 2 29 Jun 10 Circuit diagram, detector PCB 02500/855B/2 1 to 3 2 29 Jun 10 General assembly, detector PCB 02500/856A/2 1 of 1 2 29 Jun 10 Circuit diagram, motor connection PCB 02500/856B/2 1 to 3 2 29 Jun 10 Assembly, motor connection PCB 02500/861A/4 1 of 1 4 29 Jun 10 Circuit diagram, Power control PCB 02500/861B/2 1 to 3 2 29 Jun 10 Component layout, Power control PCB 02500/861C/1 1 of 1 1 29 Jun 10 Heatsink assembly, Power control PCB 02500/873A/1 1 of 1 1 29 Jun 10 Transformer, 120/240 02500/873B/1 1 of 1 1 29 Jun 10 Transformer, 100/200 02500/874A/2 1 of 1 2 29 Jun 10 Chopper box wiring diagram 02501/853/1 1 of 1 1 29 Jun 10 PCB Assembly 02501/853X/1 1 of 1 1 29 Jun 10 Circuit diagram 02501/853Y/1 1 of 1 1 29 Jun 10 PCB Layer B 02501/853Z/1 1 of 1 1 29 Jun 10 PCB Layer A 02501/855/0 1 of 1 0 29 Jun 10 General assembly, detector PCB 02501/855V/0 1 of 1 0 29 Jun 10 Layer B, detector PCB 02501/855W/0 1 of 1 0 29 Jun 10 Layer C, detector PCB 02501/855X/0 1 of 1 0 29 Jun 10 Circuit diagram, detector PCB 02501/855Y/0 1 of 1 0 29 Jun 10 Layer D, detector PCB 02501/855Z/0 1 of 1 0 29 Jun 10 Layer A, detector PCB 02501/871/0 1 of 1 0 29 Jun 10 Keypad assembly 02501/871D/0 1 of 1 0 29 Jun 10 Sealed source details 02501/872A/0 1 of 1 0 29 Jun 10 General assembly, Optical bench 02501/872B/0 1 to 2 0 29 Jun 10 Sealing details, Optical bench 02501/872C/0 1 of 1 0 29 Jun 10 Connection details, Optical bench This certificate and its schedules may only be reproduced in its entirety and without change. Form 9400 Issue 1 Page 1 of 2 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

Certificate Annexe Certificate Number: Equipment: Applicant: Sira 10ATEX9016X 2500 Series Analyser Servomex Group Limited CERTIFICATION Drawing No. Sheets Rev. Date (Sira stamp) Title 02501/872N/0 1 to 2 0 29 Jun 10 Label details, Optical bench Ex n 02501/872Q/0 1 of 1 0 29 Jun 10 Mains Filter Unit Approval 02501/873A/0 1 of 1 0 29 Jun 10 Electric heated cell, 1 to 64mm path 02501/873B/0 1 of 1 0 29 Jun 10 Electric heated cell, 128 to l000mm path 02501/873C/0 1 of 1 0 29 Jun 10 Cell Sealing Details Approval 02501/874D/0 1 of 1 0 29 Jun 10 Power distribution diagram 02501/876D/0 1 of 1 0 29 Jun 10 General assembly, short wave source 02501/880/0 1 of 1 0 29 Jun 10 Pressure compensation details 02501/882/0 1 of 1 0 29 Jun 10 Alternative fuse encapsulation 02510/851A/2 1 of 1 2 29 Jun 10 Circuit diagram, gas filter adaptor PCB 02510/851B/2 1 to 3 2 29 Jun 10 Assembly, gas filter adaptor PCB 02520/851A/2 1 of 1 2 29 Jun 10 Circuit diagram, UV/VIS detector PCB 02520/851B/1 1 to 3 1 29 Jun 10 General assembly, UV/VIS detector PCB 02550/851A/1 1 of 1 1 29 Jun 10 Circuit diagram, multicomponent adaptor PCB 02550/851B/1 1 to 3 1 29 Jun 10 Assembly, multicomponent adaptor PCB Issue 1 Drawing No. Sheets Rev. Date (Sira stamp) Title 02500/862/0 1 of 1 0 02 Sep 10 Circuit diagram, Communications board PCB 02500/862X/0 1 of 1 0 02 Sep 10 Assembly details, Communications board PCB 02520/876L/0 1 of 1 0 19 Oct 10 UV/VIS light source 02501/872N/0 1 to 2 1 02 Sep 10 Label details, Optical bench Ex n This certificate and its schedules may only be reproduced in its entirety and without change. Form 9400 Issue 1 Page 2 of 2 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

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SECTION 3 IECEx Approval for use in areas that require EPL Gc (Gases) IECEx Approval for use in areas that require EPL Db (Dusts) 2500 Series - EX2 The 2500 series EX2 instruments (2500, 2510, 2520 and 2550) have been certified as Ex n in accordance with IEC 60079-0:2007, IEC 60079-15:2005 and are suitable for use in areas that require EPL Gc (e.g. zone 2). The 2500 series EX2 instruments (2500, 2510, 2520 and 2550) have also been certified as Ex tb in accordance with IEC 60079-0:2007, IEC 60079-31:2008, and are suitable for use areas that require EPL Db (e.g. zone 21). Code: Ex na nc nl IIC T4 Gc (Tamb = -10ºC to +55ºC) for cell temperatures up to 80º C. Ex na nc nl IIC T3 Gc (Tamb = -10ºC to +55ºC) for cell temperatures up to 130º C. Code: Certificate No.: Ex tb IIIB T80ºC Db IP6X (Tamb = -10ºC to +55ºC) for unheated cell Ex tb IIIB T125ºC Db IP6X (Tamb = -10ºC to +55ºC) for cell temperatures up to 80º C. Ex tb IIIB T175ºC Db IP6X (Tamb = -10ºC to +55ºC) for cell temperatures up to130º C. IECEx SIR 10.0007X Issue 1 (Gases and Dust) Special condition of these certificates is: To avoid propagating brush discharges, the unit is not to be installed in a high velocity dust-laden atmosphere.

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SECTION 4 FMRC Hazardous Location Approval. 2500 - FM2 The 2500 series has been approved for use in US Class 1, Div. II and Class 1, Zone 2 locations without safety purging. 02500FM2 units fitted with electrically heated sample cells must be installed in locations, which provide adequate protection against the entry of solid foreign bodies and liquids capable of impairing safety. The analyser will appear in the Factory Mutual Approval Guide as shown on the Manufacturer s Declaration included in this document.

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SECTION 5 ATEX Category 2 Approval for use in Zone 1 areas 2500 Series - EU1 (Not 2520 Analyser). The 2500 series EU1 instruments (2500, 2510 and 2550) have been certified as Ex px in accordance with EN 60079-0:2009, EN 60079-2:2007 and EN 60079-11:2007 and are suitable for use in zone 1 or areas that require EPL Gb. The instrument must be used with a suitable, certified Purge Control System in order to be operated safely. ATEX Marking: Code: II 2(1)G Ex px ia [ia] IIC T5 Gb (Tamb = -20ºC to +55ºC) Ex px ia [ia] IIC T4 Gb (Tamb = -20ºC to +55ºC), fitted with steam heated cell Certificate No.: Sira 09ATEX1341X Issue 1

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CERTIFICATION 1 EC TYPE-EXAMINATION CERTIFICATE 2 Equipment intended for use in Potentially Explosive Atmospheres Directive 94/9/EC 3 Certificate Number: Sira 09ATEX1341X Issue: 1 4 Equipment: 2500 Series Analyser 5 Applicant: Servomex Limited 6 Address: Jarvis Brook Crowborough East Sussex TN6 3FB UK 7 This equipment and any acceptable variation thereto is specified in the schedule to this certificate and the documents therein referred to. 8 Sira Certification Service, notified body number 0518 in accordance with Article 9 of Directive 94/9/EC of 23 March 1994, certifies that this equipment has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of equipment intended for use in potentially explosive atmospheres given in Annex II to the Directive. The examination and test results are recorded in the confidential reports listed in Section 14.2. 9 Compliance with the Essential Health and Safety Requirements, with the exception of those listed in the schedule to this certificate, has been assured by compliance with the following documents: EN 60079-0:2009 EN 60079-2:2007 EN 60079-11:2007 EN 60079-26:2007 10 If the sign X is placed after the certificate number, it indicates that the equipment is subject to special conditions for safe use specified in the schedule to this certificate. 11 This EC type-examination certificate relates only to the design and construction of the specified equipment. If applicable, further requirements of this Directive apply to the manufacture and supply of this equipment. 12 The marking of the equipment shall include the following: II 2 (1) G Ex px ia [ia] IIC T5 Gb Ex px ia [ia] IIC T4 Gb (with heated cell) Ta = -20 C to +55 C Project Number 23365 C Ellaby C. Index 13 Certification Officer This certificate and its schedules may only be reproduced in its entirety and without change. Form 9400 Issue 1 Page 1 of 4 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

CERTIFICATION SCHEDULE EC TYPE-EXAMINATION CERTIFICATE Sira 09ATEX1341X Issue 1 13 DESCRIPTION OF EQUIPMENT The 2500 IR Optical Bench is an industrial spectrophotometer measuring concentrations of fluids in the infrared or visible regions of the spectrum. The components of the system are a hot body to provide a radiation source (440 µw), an optical chopper and motor housed in a chopper box, a sample cell, a detector and associated electronics. The electronics are housed in two cast aluminium boxes, one at each end of the sample cell. A duct connects these two boxes. This duct acts as a chassis and carries cabling. Each of the end boxes has a hinged lid. The sample cell length varies with application. The end box containing the radiation source and optical chopper also contains an electronics assembly (power control board) to drive the radiation source, chopper motor, chopper box heater, and calibration/sample switching solenoid valves. The solenoid valves do not form part of the equipment. The end box containing the detector assembly also contains a mains transformer and an electronics assembly (transmitter board) for signal processing, into which plugs a switch mode power converter. The detector assembly includes a pre-amplifier. A microprocessor board, a sensor/interface board, a keypad and a display are mounted in the 2500 Optical Bench and into the transmitter board. The keypad and display are mounted on the hinged lid. An optional output board may be also fitted to the transmitter board and provides two volt free relay contacts and two isolated current/voltage outputs. The keypad and associated circuit is intrinsically safe. The design of the equipment may be modified by the addition of a gas filter adapter PCB or multicomponent adaptor, the equipment type number becomes 2510 or 2550 when these boards are used. Safety is achieved by purging the contents of the enclosures with a suitable quantity of protective gas (either air or an inert gas such as nitrogen, argon, etc.) prior to pressurisation and the eventual powering up of the equipment. The enclosures are of good mechanical strength and purging and pressurisation is controlled by a suitably certified purge controller. A Pressure Measuring System is intended for incorporation into the 2500 Series of Gas Analysers as an option and comprises a suitably certified pressure transducer and if certified under the Ex ia protection concept a suitably certified Power Supply. The Power Supply is to be located within the source end purged enclosure (non-hazardous area) with the Pressure Transmitter mounted on the outside of the 2500 Series Analyser in a potentially hazardous area. Electrical connections between the Power Supply and Pressure Transmitter, if fitted, are made by means of a cable having a maximum length of 2 metres. Access for the cable is provided by a suitable gland arrangement fitted into a wall of the source end enclosure. Intrinsic safety is assured by the limitation of voltage and current to the Pressure Transmitter. Variation 1 - This variation introduced the following changes: i. An alternative label material was allowed to be used. ii. A steam heated cell option was included, the marking being: Ex px ia [ia] IIC T4 Gb (Ta = -20 C +55 C). iii. The use of alternative mains filter mounting spacers was recognised. iv. Drawing number 02501/876J/0 was removed from the approved drawing list. This certificate and its schedules may only be reproduced in its entirety and without change. Form 9400 Issue1 Page 2 of 4 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

CERTIFICATION SCHEDULE EC TYPE-EXAMINATION CERTIFICATE Sira 09ATEX1341X Issue 1 14 DESCRIPTIVE DOCUMENTS 14.1 Drawings Refer to Certificate Annexe. 14.2 Associated Sira Reports and Certificate History Issue Date Report no. Comment 0 2 February 2010 R18229A/00 The release of the prime certificate. 1 19 October 2010 R23365A/00 The introduction of Variation 1. 15 SPECIAL CONDITIONS FOR SAFE USE (denoted by X after the certificate number) 15.1 The purge control system (PCS) shall be suitably certified and shall have the following characteristics (Note: if the 2500 Series equipment is affixed with the IECEx label, then the PCS unit must be IECEx certified): Minimum permitted purge rate Minimum permitted purge duration Minimum overpressure Maximum overpressure 10 L/min 11 minutes 0.5 mbar (50 Pa) 80 mbar (8000 Pa) All monitoring shall be carried out in the return leg. The PCS shall include an automatic device that operates when the overpressure falls below the minimum prescribed value. The device shall operate a pressure switch that can be used for alarm and/or isolation purposes. When the PCS is used to protect the series combination of enclosures, the protective gas supply shall be connected from the PCS to the first enclosure and serially connected to the remaining enclosures. Overpressure shall be monitored by the PCS unit to ensure that the minimum overpressure is maintained and the maximum overpressure specified in normal service (80 mbar) is not exceeded. If the certified PCS unit is not fitted with a normally closed relief vent and vents into a hazardous area a protective device shall be fitted to the unit to prevent sparks or incandescent particles from being ejected. The PCS is required to carry out a purge cycle after a pressure loss before power can be restored to the equipment. The PCS shall contain a pressure sensing element which is factory set to a level not less than the specified minimum (50 Pa, 0.5 mbar) and shall measure pressure at the point in the system where the lowest pressure occurs. The PCS shall supply a flow rate of protective gas not less than 10 standard litres per minute and shall incorporate an automatic device to monitor flow during the purge time specified below. The PCS shall maintain the minimum specified overpressure during the purge phase and afterwards. The PCS shall incorporate a purge timer that shall be set to not less than 11 minutes. The purge timer shall be re-set to zero if either the minimum overpressure or minimum purge flow is not maintained. The PCS shall incorporate a device to ensure that power is not connected to the apparatus being protected until the specified purge time has elapsed. If the PCS is certified to EN 60079-2:2007 or IEC 60079-2:2007, then it shall satisfy the requirements of Clause 7. This certificate and its schedules may only be reproduced in its entirety and without change. Form 9400 Issue1 Page 3 of 4 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

CERTIFICATION SCHEDULE EC TYPE-EXAMINATION CERTIFICATE Sira 09ATEX1341X Issue 1 15.2 When fitted with the optional plastic cell cover, the equipment is to be marked with the following; WARNING: POTENTIAL ELECTROSTATIC CHARGING HAZARD REFER TO MANUAL. 15.3 When fitted with an optional steam heated cell, the user/installer shall ensure the supply steam temperatures do not exceed 120ºC. 16 ESSENTIAL HEALTH AND SAFETY REQUIREMENTS OF ANNEX II (EHSRs) The relevant EHSRs that are not addressed by the standards listed in this certificate have been identified and individually assessed in the reports listed in Section 14.2. 17 CONDITIONS OF CERTIFICATION 17.1 The use of this certificate is subject to the Regulations Applicable to Holders of Sira Certificates. 17.2 Holders of EC type-examination certificates are required to comply with the production control requirements defined in Article 8 of directive 94/9/EC. 17.3 All cable entries or closing devices for unused entries shall be suitably certified to ensure that they comply with the General Requirements of EN 60079-0:2009. 17.4 The maximum total power dissipation into the equipment shall not exceed: 60 W in the 2500 Bench Transmitter End 60 W in the 2500 Power Control Board End 17.5 The existing segregation distances of the Keypad and LED Driver Circuit shall not be impaired when it is installed in the 2500 Series Analyser. 17.6 Any suitably certified Pressure Transducer and/or power supply connected to the 2500 Series Analyser is outside the scope of this certificate but may be used without affecting the protection concept and shall have a Temperature Classification of T4 or T5 as appropriate. If a suitably certified power supply is utilised, segregation distances shall not be impaired when it is installed into the 2500 Series Analyser. This certificate and its schedules may only be reproduced in its entirety and without change. Form 9400 Issue1 Page 4 of 4 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

Certificate Annexe Certificate Number: Equipment: Applicant: Sira 09ATEX1341X 2500 Series Analyser Servomex Limited CERTIFICATION Issue 0 Drawing Sheets Rev. Date (Sira stamp) Title 02501/853/1 1 of 1 1 23 Dec 09 PCB Assembly 02501/853X/1 1 of 1 1 23 Dec 09 Circuit diagram 02501/853Y/1 1 of 1 1 23 Dec 09 PCB Layer B 02501/853Z/1 1 of 1 1 23 Dec 09 PCB Layer A 02501/871/0 1 of 1 0 23 Dec 09 Keypad assembly 02501/872P/0 1 of 1 0 23 Dec 09 ATEX & IECEx label 02501/873C/0 1 of 1 0 18 Jan 10 Cell sealing details 02501/876B/0 1 of 1 0 23 Dec 09 Optical bench sealing materials approvals p 02501/876C/0 1 of 1 0 23 Dec 09 Mech G.A. short wave source approval 02501/876H/0 1 of 1 0 23 Dec 09 Optical bench G.A. details approval p 02501/876J/0 1 of 1 0 23 Dec 09 Optical bench G.A. details. Approval p 02501/876K/0 1 of 1 0 23 Dec 09 Purged mains filter G.A./sealing approval p 02501/876N/1 1 of 1 1 23 Dec 09 Hinged lid assembly 02501/879B/0 1 of 1 0 23 Dec 09 Schematic of purge controller and bench 02501/882/0 1 of 1 0 23 Dec 09 Alternative fuse encapsulation 00100/850/0 1 of 1 0 23 Dec 09 Approval, Alternative rating/serial number label Issue 1 The following drawings are introduced by this Issue: Drawing Sheets Rev. Date (Sira stamp) Title 02501/873D/0 1 of 1 0 24 Sep 10 Steam Heated cell Assemblies 02501/876K/1 1 of 1 1 24 Sep 10 Purged mains filter G.A/Sealing Approval P 02501/872P/1 1 of 1 1 24 Sep 10 ATEX & IECEx Label Optical Bench type P The following drawing is removed by this Issue: Drawing Sheets Rev. Date (Sira stamp) Title 02501/876J/0 1 of 1 0 23 Dec 09 Optical bench G.A. details. Approval p This certificate and its schedules may only be reproduced in its entirety and without change. Form 9400 Issue 1 Page 1 of 1 Sira Certification Service Rake Lane, Eccleston, Chester, CH4 9JN, England Tel: +44 (0) 1244 670900 Fax: +44 (0) 1244 681330 Email: info@siracertification.com Web: www.siracertification.com

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SECTION 6 IECEx Approval for use in areas that require EPL Gb 2500 Series - EX1 (Not 2520 Analyser). The 2500 series EX1 instruments (2500, 2510 and 2550) have been certified as Ex px in accordance with IEC 60079-0:2007, IEC 60079-2:2007 and IEC 60079-11:2006 and are suitable for use in areas that require EPL Gb (e.g. zone 1). The instrument must be used with an IECEx certified Purge Control System in order to be operated safely. Code: Ex px ia [ia] IIC T5 Gb (Tamb = -20ºC to +55ºC) Ex px ia [ia] IIC T4 Gb (Tamb = -20ºC to +55ºC), fitted with steam heated cell Certificate No.: IECEx SIR09.0136X Issue 1

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