Fixed Gas Detection System/Meridian CERTIFICATION

Transcription

1 The marking shall include 2 Wire Aluminum Transmitter 3/4 Wire Aluminum Transmitter 2 Wire Stainless Steel Transmitter (PN: ) (PN: ) (PN: ) Ex db [ia Ga] IIC T4 Gb Ex db [ia Ga] IIC T4 Gb Ex db [ia Ma] I Mb Ex tb [ia Da] IIIC T85 C Db Ex tb [ia Da] IIIC T85 C Db Ex db [ia Ga] IIC T4 Gb Ex tb [ia Da] IIIC T85 C Db 3/4 Wire Stainless Steel Transmitters Aluminum Junction Box Stainless Steel Junction Box (PN: ) (PN: ) (PN: ) Ex db [ia Ma] I Mb Ex ia IIC T4 Ga Ex ia I Ma Ex db [ia Ga] IIC T4 Gb Ex ia IIIC T80 C Da Ex ia IIC T4 Ga Ex tb [ia Da] IIIC T85 C Db Ex ia IIIC T80 C Da 2 Wire Detector Head (PN: and ) Direct/Integral Connection to Transmitter with E-Chem type sensor only Remote Connection to Transmitter with E-Chem type sensor only Ex db ia I Mb Ex ia I Ma Ex db ia IIC T4 Gb Ex ia IIC T4 Ga Ex ia IIIC T80 C Da Ex ia IIIC T80 C Da 3/4 Wire Detector Head (PN: and ) Direct/Integral Connection to Transmitter with any type sensor Remote Connection to Transmitter without IR type sensor Ex db ia I Mb Ex ia I Ma Ex db ia IIC T4 Gb Ex ia IIC T4 Ga Ex ia IIIC T185 C Da Ex ia IIIC T185 C Da Sensors Types All E-Chem Type Sensors (PN: thru ) Cat Bead and MOS Type Sensors (PN: and ) IR Type Sensors (PN: and ) Ex ia I Ma Ex ia I Ma Ex ia I Mb Ex ia IIC T4 Ga Ex ia IIC T4 Ga Ex db ia IIC T4 Gb Ex ia IIIC T80 C Da Ex ia IIIC T185 C Da Ex ia IIIC T110 C Da 3/4 Wire Transmitters PN: and , and 3/4 Wire Detector Head PN: and , and Sensor PN: and shall be marked: Performance assessed per IEC when fitted with combustible sensor or equivalent. The system consists of a transmitter, optional cable gland, optional junction box, detector head, and sensors. There is a 2 wire and 3/4 wire version of the system. The 2 wire system is only allowed to have a single E- Chem sensor (PN to ) connected. The 3/4 wire system is allowed to have up to three sensors connected in any combination noted in the table below: Date: 6 March 2015 Page 1 of 5

2 MERIDIAN ¾ Wire Transmitter allowed Sensor Combinations (USE ONLY WITH IS BARRIER ASSEMBLY ) Sensor #1 Sensor # 2 Sensor # 3 O 2 ( ) Combustible Cat Bead ( ) MOS ( ) IR CO 2 ( ) Combustible IR ( = WARNING DO NOT USE THESE COMBINATIONS UNDER ANY CIRCUMSTANCES. THEY ARE NOT INTRINSICALLY SAFE AND CAN CAUSE EXPLOSION. *ECHEM SENSOR PART NUMBERS THRU , THRU AND SENSOR SIMULATOR **OXYGEN SENSOR PART NUMBER Transmitter The transmitter is a flame-proof device that houses the power supply, display, optional communications, and the intrinsic safety barriers that limit the energy to the detector head/sensors. The different models of the transmitter are outlined below: Part Number Wire Transmitter Aluminum Housing /4 Wire Transmitter Aluminum Housing Wire Transmitter Stainless Steel Housing /4 Wire Transmitter Stainless Steel Housing Junction Box The Junction Box is an optional component that can be used in a remote connection of a single sensor in a 2 wire or 3/4 wire system. It is also used in 3/4 wire system when more than one sensor is to be used. All power in the Junction box is intrinsically safe and is limited from the IS barriers located in the transmitter. There are two different versions of the junction box. The only difference between the models is the housing. Below are the model numbers and descriptions. Part Number Junction Box Aluminum Housing Junction Box Stainless Steel Housing Date: 6 March 2015 Page 2 of 5

3 Detector Head The detector head is the housing/interface for all the sensor modules. The detector may be installed directly to the transmitter. In this situation, the detector head incorporates a flame-proof cable gland and no further seal or stopping box is required, it may also be located remotely from the transmitter. There are fundamentally two versions of the Detector Head. There is a 2 wire version and a 3/4 wire version. In addition, each of these detector heads is allowed to use either the stainless steel (PN ) or non-metallic (PN ) end caps. Below are the model numbers and descriptions /4 Wire Detector Head with non-metallic end cap (PN ) /4 Wire Detector Head with stainless steel end cap (PN ) Wire Detector Head with non-metallic end cap (PN ) Wire Detector Head with stainless steel end cap (PN ) Sensors All the sensors are required to be installed inside the detector head. Any of the sensors noted below will connect to the detector head. E-Chem These sensors are typical electro-chemical type sensors used to sense both toxic gases and oxygen. These may be used with either the 2 wire or 3/4 wire systems. MOS This sensor may only be used with the 3/4 wire system. This sensor utilizes a H2S sensor (Synkera, PN 727-1). Cat Bead This sensor may only be used with the 3/4 wire system. This sensor utilizes a LEL combustible gas sensor (SGX, PN VQ548ZD). IR Combustible This sensor may only be used with the 3/4 wire system. The sensor utilizes an IR sensor (SGX, PN IR12GJS). IR CO2 This sensor may only be used with the 3/4 wire system. The sensor utilizes an IR sensor (SGX, PN IR11 GJS) thru (54 in total) E-Chem Sensor Cat Bead Sensor IR Combustible Sensor MOS Sensor IR CO 2 Sensor Date: 6 March 2015 Page 3 of 5

4 Accessories Cable Gland This cable gland is used on the transmitter when a remote installation is required Cable Gland Sensor Simulator The sensor simulator may be used with either the 2 wire or 3/4 wire system. This device is intended to be used to perform maintenance functions with the system only Sensor Simulator Certified Ex Components Manufacturer Approval Details Certificate Comments Transmitter (Stainless Steel IECEX KDB U Transmitter (Aluminum Junction Box (Stalnless Steel Junction Box (Aluminum IR Sensor Kernel (Combustible) Limatherm XD-S120win Ex d I Mb Ex d IIC Gb Limatherm XD-120win Ex d IIC Gb IP68 International Metal Engineering (IME) 7092 Ex d IIC Gb Limatherm XD-JBBS Ex d IIC Gb Ex tb IIIC Db IECEx FTZU U IECEX SIR U IECEX FTZU U SGX IR12GJS Ex d IIC Gb IECEX SIR U IR Sensor Kernel (CO2) SGX IR11GJS Ex d IIC Gb IECEX SIR U -50 C Ta 85 C (with VMQ D-Rlng) -40 C Ta 85 C -40 C Ta 85 C -40 C Ta 100 C -40 C Ta 75 C Lamp Circuit: Ui = 7.2 Volts, Detector Circuit: Ui = 10 Volts, Lamp & Detector: Pi = 1.5Watts -40 C Ta 75 C Lamp Circuit: Ui = 7.2 Volts, Detector Circuit: Ui = 10 Volts, Lamp & Detector: Pi = 1.5Watts Date: 6 March 2015 Page 4 of 5

5 Conditions of Certification i. All openings to the transmitter and junction box must sealed using suitable flame-proof, type d stopping boxes or type d glands with a minimum IP rating of. ii. Transmitter must be bonded to ground both internally and externally with suitably sized conductors (IEC , cl. 15.3) iii. The 2 wire system may only be used with a single electrochemical sensor and must be installed in accordance with control drawing B. iv. The 3/4 Wire system may be used with one to three sensors and must be installed in accordance with control drawing B. v. Sensors may only be installed or removed when the area is clean and dry. vi. All wiring used must be specified in accordance with the following conditions: For Installations Ta < 60 C: Temperature rating of wire must be equal to or greater than 105ºC. For Installations Ta 60 C: Temperature rating of wire must be equal to or greater than 120ºC. For Input Power and Relay: Use field wire 18 AWG (1.0 mm 2 ) min For Communications: Use field wire 24 AWG (0.2 mm 2 ) min vii. The equipment shall be regularly cleaned to ensure there is no dust accumulated on the surface in excess of 5mm. Accessories: viii. The sensor simulator is only for temporary use under direct supervisions with the following conditions: Only to be used in clean and dry environments It must be protected from impact Conditions Of Manufacture i. The intrinsic safety barriers are required to be 100% tested to verify proper operation and the nominal resistance of the fuse verified. ii. Each batch of Potentiometers (Honeywell, PN 392JB5K) must be tested to verify the following: Inductance 60.0mH iii. Each batch of MOS Sensors (Synkera, PN 727-1) must be tested to verify the following: Inductance: 2.0µH (Pins 1 to 3) Capacitance: 0.5µFcombined (Pin 1 to 4, Pin 2 to 3, and Pin 2 to 4) iv. Each batch of CAT Bead Sensors (SGX, PN VQ548ZD) must be tested to verify the following: Detector Inductance: 1.0µH Comparator Inductance: 1.0µH v. The aluminum transmitter housing (Limatherm, PN XD-120win) shall be subject to 100% routine overpressure testing to a minimum pressure of Bar in accordance with IEC , CI As result, there shall be no leakage through the walls of the enclosure, damage, or deformation to the joints or housing. Date: 6 March 2015 Page 5 of 5