Page 1: Table Of Contents
T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTE R A T E X GROUP I & II INTRINSICALLY SAFE PETROCHEMICAL PROCESSING INSTALLATION & MINING& OPERATING DATA TUNNELLING OFFSHORE PLATFORMS MANUFACTURING & PROCESS PLANTS contents...
Page 2: A T E X
T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 1 PRINCIPAL OPERATING FEATURES Stationary gas sensors for the detection of a wide range of flammable gases. Suitable for use in SIL 1 and SIL 2 applications, in accordance with any conditions or restrictions Poison resistant CATALYTIC COMBUSTION sensors.
Page 3: Application
GROUP I & II INTRINSICALLY SAFE A range of primary instrumentation and monitoring modules is available from Trolex to which the sensors can be directly connected to provide a flexible choice of display and control functions. TRIP AMPLIFIER for use with analogue output sensors.
Page 4: Dimensions
T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 3 DIMENSIONS 3.1 TX6383 Flammable Gas Sensor/Transmitter 3.2 TX6383.84 Flammable Gas Sensor/Transmitter with Remote Gas Sensing Module 2 Fixing Holes for M6 Socket Cap Head Screws 2 Holes for...
Page 5 T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 4 TECHNICAL DETAILS continued Electrical Details TX6383.01 GROUP I APPLICATIONS (12 V dc) Output: 0.4 to 2 V dc Min Load 10 k ohms Supply 6.5 to 16.5 V dc...
Page 6: Installation
T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 5 INSTALLATION Conformity Check (Refer to Test Certificate provided with the sensor). Does the output signal of the sensor concur with the 15 Hz 20 mA input requirement of the monitoring equipment being used?
Page 7 A very important part of an efficient gas monitoring system is the training of plant personnel in operation and maintenance of the sensors and the complete monitoring system. Training facilities can be provided by qualified Trolex application engineers. Once a sensor installation is complete, the sensor locations and types should be formally recorded and a planned test and maintenance procedure instituted.
Page 8 T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 5 INSTALLATION continued 5.5 Relative Density The relative density or buoyancy of the gas or vapour with respect to air is a very important consideration.
Page 9 T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 5 INSTALLATION continued 5.6 Hazardous Areas Do not disassemble the sensor whilst in the hazardous area or use a sensor that has a damaged housing in the hazardous area. 5.7 Evacuation If a dangerous level of gas concentration is detected by the instrument, leave the area immediately.
Page 10 T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 5 INSTALLATION continued 5.12 High Concentrations of Flammable Gas Exposure of low concentration catalytic combustion sensors to concentrations of flammable gas greater than the LEL can affect the sensitivity and zero stability of catalytic elements and the calibration should be checked after such an exposure.
Page 11: Connections
T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 6 CONNECTIONS OUTPUT SIGNAL OPTIONS TX6383 FLAMMABLE GAS SENSOR/ TRANSMITTER 1 2 3 4 5 6 7 8 Signal Supply 0.4 to 2 V Output Signal A low impedance two-wire voltage TX9132 output signal requiring a separate...
Page 12 T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 6 CONNECTIONS continued 5 to 15 Hz Output Signal TX6383 15 Hz A square wave, frequency variable output that is proportional to the measured value. Monitoring The output device is an open collector NPN Device...
Page 13 1 2 3 4 5 KFD2–SL2–EX 2B +24 V Supply KFD2–STC4-EX 1 4 to 20 mA Signal If you require any help with the use and connection of hazardous area equipment please contact the Trolex Technical Department. 13/28 ISSUE S 01/15...
Page 14: Controls And Indicators
T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 7 CONTROLS AND INDICATORS TX6383 FLAMMABLE GAS SENSOR/ Gas Concentration Display Calibration STATUS indicator SPAN calibrate pushbutton Cable Entry ZERO calibrate pushbutton Plug-in Gas Earth Sensing Module...
Page 15: Calibration
Product Suppor t Depar tment. Alternatively the gas sensing module may be re-calibrated when required, using a Trolex TX6520 Gas Test Kit equipped with both Air and Test Gas canisters. Prepare to Calibrate The sensor should be powered for a minimum of 30 minutes A T E X prior to commencing calibration.
Page 16 T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 8 CALIBRATION continued Prepare to Calibrate Press BOTH pushbuttons on the gas sensing module for about 5 seconds. Then release. The indicator will be denoting that the module is now setup ready for: 8 .3...
Page 17 T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 8 CALIBRATION continued Calibrate ZERO Apply purge air, at a flow rate of 0.2 to 1 l/min, for 20 seconds to clear all remnants of gas. Press CALIBRATE ZERO until the indicator is flashing GREEN (about 3 seconds).
Page 18 T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 8 CALIBRATION continued Calibrate SPAN Apply test gas, at a flow rate of 0.2 to 1 l/min, until the display value stabilises. The Gas Sensing Module will automatically return to the NORMAL measuring mode if NO pushbuttons are TEST GAS...
Page 19 T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 8 CALIBRATION continued Over Range Indication Erroneous readings will be given by a pellistor gas sensing element if it is exposed to gas concentrations that exceed its Pellistor normal working range of 0 to 5% v/v CH Signal...
Page 20: Maintenance
Output Signal Check the response of the sensor at pre-determined intervals by injecting a test gas using a Trolex TX6520.32 Gas Test Kit. Compare the value of the display with the value marked on the test gas canister.
Page 21 Annual Safety Check The main transmitter itself will not normally require maintenance or calibration but it is advisable to return it to the Trolex Product Support Department for an annual safety check. Damaged Sensors A Sensor that has been dropped or damaged in any way should be taken out of service immediately for inspection, repair and re-calibration.
Page 22 T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 9 MAINTENANCE continued Maintenance and Calibration Log ORDER REF TX6383 DATE SUPPLIED SERIAL No. USER GAS TYPE LOCATION DATE SCHEDULED FAILURE RE-CALIBRATE CHANGE GAS RETURN TO COMMENTS...
Page 23: Approvals And Certification
Prior to installation, it is essential that the user refers to the above certificate to ensure that the termination and cable parameters are fully complied with and are compatible with the application. Copies of certificates are available from Trolex. 10.3 Russia (GOST-R) Ex certificate number: POCC GB.ME92.B02880...
Page 24 Prior to installation, it is essential that user refers to the above certificates to ensure that the termination and cable parameters are fully complied with and are compatible with the application. Copies of certificates are available from Trolex. A T E X GROUP I &...
Page 25: Functional Safety
T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 11 FUNCTIONAL SAFETY Overview of Safety Integrity Level 11.1 The following instructions are applicable when the TX6383 Flammable Gas Sensor/Transmitter is used as an element in a safety instrumented function that is specified to achieve a Safety Integrity Level (SIL), eg.
Page 26 T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 11 FUNCTIONAL SAFETY continued Summary of the Verified Functional Safety Data 11.3 The product, configuration and safety manual that have been assessed are shown in Table 1.
Page 27 T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 11 FUNCTIONAL SAFETY continued Conditions or Restrictions for use in SIL Applications 11.4 The sections of this Installation and Operating Data manual shall be strictly complied with to ensure validity of the failure data and systematic safety integrity.
Page 28 T T X X 6 6 3 3 8 8 3 3 FLAMMABLE GAS SENSOR/TRANSMITTER INSTALLATION & OPERATING DATA 11 FUNCTIONAL SAFETY continued System Configuration Drawing 11.6 The illustration below shows how the TX6383 is to be used with other system elements.

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