Trolex TX6351 User Manual
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Trolex TX6351 User Manual

Sentro 1 universal gas detector
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  • Page 3: Table Of Contents

    TX6351 • TX6352 User Manual TX6351 • TX6352 Sentro 1 Universal Gas Detector Contents Product Overview Setup and Calibration Operating Features Controls and Indicators Application Main Display Product Options Security Code Access Dimensions Main Menu Technical Information 4.4.1 Calibrate Electrical Details 4.4.2 Sentro 1 Setup...

  • Page 4: Product Overview

    Product Overview 3/4 wire device with separate output signal and power lines. TX6351 Can be used with any Sentro eModule 2-wire line powered 4 to 20 mA output signal. TX6352 Can ONLY be used with electrochemical Sentro eModules Operating Features •...

  • Page 5: Application

    TX6351 • TX6352 User Manual Application Fixed point gas detection for safety monitoring in hazardous areas and general purpose applications. Underground Mining and Tunnelling Supply Voltage: 12 V dc from an approved power source Ex ia I Ma Type of protection: TX6351.01...

  • Page 6: Dimensions

    Dimensions P5536.1600 rev A www.trolex.com...

  • Page 7: Technical Information

    TX6351 • TX6352 User Manual Technical Information -20 to +40°C Ambient temperature limits Storage temperature -20 to +60°C 800 to 1100 mbar Ambient pressure Humidity 90% non-condensing Dust and waterproof to IP65. Gas Port: IP54. Protection classification Housing material Reinforced polymer...
  • Page 8 Automatic calibration of STEL and TWA limits to EH40 standards. STEL: Exposure over 15-minute successive periods TWA: Exposure over a continuous rolling 8-hour period Output signals 0.4 to 2 V 4 to 20 mA 5 to 15 Hz Dual contacts RS485 Modbus datacomms P5536.1600 rev A www.trolex.com...

  • Page 9: Electrical Details

    TX6351 • TX6352 User Manual 1.6 Electrical Details General Purpose TX6351 3/4 wire. Remote powered 4 to 20 mA analogue output Supply voltage: 18 to 28 V Max. line load: 500 R at 24 V Type of sensor: Toxic Flammable...
  • Page 10 Mining and Tunnelling TX6351 3/4 wire. Remote powered 4 to 20 mA Supply voltage: 10 to 14 V Max. line load: 220 R maximum @ 12 V dc Type of sensor: Toxic Flammable Infrared Supply current @ 12 V: 48 mA...

  • Page 11: Sentro Emodules

    TX6351 • TX6352 User Manual TX6352 2 wire. Remote powered 4 to 20 mA analogue output Supply voltage: 10 to 14 V Max. line load: 90 R Type of sensor: Toxic only Sentro eModules Plug-in pre-calibrated modules with standardised output data.
  • Page 12 2.00% (.244) HIGH alarm Checkpoint Not suitable for use with the TX6352 4 to 20 mA two wire, line powered version of Sentro. Checkpoint The pellistor is automatically protected against exposure to excessively high concentrations of gas. P5536.1600 rev A www.trolex.com...
  • Page 13 TX6351 • TX6352 User Manual Toxic gases • Electrochemical cells Selected toxic gas modules are equipped with automatic STEL/TWA calculation in accordance with EH40. Section 4.4.5 TX6350 .250.50 .250.250 .250.300 .250.500 .251 .252 Carbon Carbon Carbon Carbon Hydrogen Sulphur Monoxide...
  • Page 14 5 ppm 2.5 ppm 5 ppm 250 ppm (under) alarm 10 ppm 5 ppm 20 ppm 500 ppm HIGH alarm (over) 5 ppm 5 ppm 10 ppm STEL & TWA 3 ppm 3 ppm 3 ppm P5536.1600 rev A www.trolex.com...
  • Page 15 Trolex recommends that this is carried out every 3 weeks. For other gas sensors Trolex recommends that this is carried out in accordance with best practice for the industry where the gas sensor is being used, and should take into consideration local operating conditions.
  • Page 16 15 to 90% non-condensing humidity Operating -10 to +40°C temperature GENERAL 1.25% v/v 10% LEL 25% v/v 0.5% v/v 1.25% v/v 25% v/v alarm HIGH alarm 2.5% v/v 20% LEL 50% v/v 1 % v/v 2.5% v/v 50% v/v P5536.1600 rev A www.trolex.com...
  • Page 17 TX6351 • TX6352 User Manual Checkpoint - Carbon Dioxide Sensors Normal atmosphere contains carbon dioxide which will affect the sensor signal so nitrogen gas must be used to accurately calibrate the zero value. Power should be applied to the sensor and the nitrogen applied for at least 5 minutes to ensure that the sensor has stabilised.

  • Page 18: Certification

    Copies of certificates are available from www.trolex.com. ATEX directive 94/9/EC EMC directive 2004/108/EC Special Conditions for Safe Use...
  • Page 19 Prior to installation, it is essential that 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. 2.4 India (CIMFR) Test report number: CIMFR/TC/P/H738 www.trolex.com...
  • Page 20 2.5 Australia (IECEx) Ex certified for use in Ma applications: Australia (IECEx): TX6351.01i.xx/TX6352.01i.xx Ex Certificate number: IECEx ITA 14.0006X Ex Certification code: Ex ia I Ma Conditions of Safe Use The following safety parameters are applicable to the Sentro 1 Sensor/Transmitters:...
  • Page 21 Prior to installation, it is essential that 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 Ltd. www.trolex.com...

  • Page 22: Installation

    Lower Explosive Limit (LEL). After this point, the output becomes non-linear and may erroneously indicate that the gas concentration is below the LEL. They should not be used in oxygen enriched or deficient atmospheres. P5536.1600 rev A www.trolex.com...

  • Page 23: Tools And Test Equipment Required

    TX6351 • TX6352 User Manual Discrimination Catalytic combustion sensors can detect a wide range of flammable gases but they cannot discriminate between individual gases. They will respond to most, or all, of the flammable components present in the atmosphere without distinguishing between them.
  • Page 24 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 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 25: Connections

    TX6351 • TX6352 User Manual 3.4 Connections 3.4.1 0.4 to 2 V Analogue Output Signal A low impedance two-wire voltage output signal requiring a separate power supply to the sensor. 12 V dc power can usually be derived from the monitoring instrument being used.

  • Page 26: To 20 Ma Analogue

    3.4.2 4 to 20 mA Analogue Output Signal TX6351 The output signal from terminals 1 and 2 is a conventional 4 to 20 mA two wire current regulated signal loop. TX6352 (Toxic Sentro eModules only) The output signal from terminals 1 and 2 is a conventional 4 to 20 mA two wire current regulated signal loop.

  • Page 27: Contact Output Signal

    TX6351 • TX6352 User Manual 3.4.3 5 to 15 Hz Output Signal A square wave, frequency variable output that is proportional to the measured value. A pull up resistor may be required at the monitoring device. 3.4.4 Contact Output Signal Dual independent output contacts for remote signalling and control.

  • Page 28: Rs485 Data Output Signal

    The address code of the sensor is marked on the duty label of the sensor. RS485 Physical layer: Trolex proprietary Protocol: Connection mode: Modbus Number of points: Maximum distance: 1,000 m...

  • Page 29: Connecting In Hazardous Areas

    TX6351 • TX6352 User Manual 3.5 Connecting in Hazardous Areas Intrinsically Safe Certified Intrinsically Safe for use in mining Apparatus hazardous areas, category M1, when used with approved monitoring apparatus. Hazardous Area Power for the sensor must be derived from an approved 12 V dc power supply e.g.

  • Page 30: Setup And Calibration

    Setup and Calibration 4.1 Controls and Indicators P5536.1600 rev A www.trolex.com...
  • Page 31 TX6351 • TX6352 User Manual www.trolex.com P5536.1600 rev A...

  • Page 32: Main Display

    4.2 Main Display Power On NEXT/FUNCTION SELECT/CHANGE Checkpoint Next/Function is the Left hand key (L) and Select/Change is the Right hand key (R). P5536.1600 rev A www.trolex.com...

  • Page 33: Security Code Access

    TX6351 • TX6352 User Manual Main Menu Press the R key to enter the Main Menu Section 4.3 Section 4.4 Checkpoint The front cover of Sentro may be safely removed, for setup in a hazardous area, even with the power applied.

  • Page 34: Main Menu

    Reset Output Set Relay 1 Mode Set Relay 2 Mode Exit Modbus Setup Modbus Address Baud Rate Section 4.4.4 TX On Delay TX Off Delay Exit Module Setup Setpoint 1 Setpoint 2 Section 4.4.5 STEL/TWA Exit P5536.1600 rev A www.trolex.com...

  • Page 35: Calibrate

    TX6351 • TX6352 User Manual 4.4.1 Calibrate Connect a Gas Test Kit equipped with both ‘clean air’ and the appropriate test gas canisters. Section 5.2 Calibrate Zero • Follow the prompt bar and screen instructions • Go to Span www.trolex.com...
  • Page 36 Calibrate Span using a Test Gas of EXPECTED value • Follow the prompt bar and screen instructions • Key Done and return to the Main Display Press L and R together to quit and return to the main display. P5536.1600 rev A www.trolex.com...
  • Page 37 TX6351 • TX6352 User Manual Calibrate Span using a Test Gas of DIFFERENT value The display will show the concentration of Span Gas that is EXPECTED to be used. Set the expected value to agree with the actual Test Gas value: •...

  • Page 38: Sentro 1 Setup

    System Information Display Display Setup • The display backlight illumination may be set to on, or off, to reduce power consumption. (TX6351 only) • The contrast of the display may be set for best visual appearance. P5536.1600 rev A www.trolex.com...
  • Page 39 TX6351 • TX6352 User Manual Alert Setup (TX6351 only) • The integral GENERAL and HIGH visual alarms can be set to ON or OFF . • The ‘confidence’ condition flash can be set to ON or OFF . Set Security Code •...

  • Page 40: Output Setup

    The level of the transmitted output signal when the sensor is measuring a given Span can be trimmed or offset. Reset Output • Reset the Zero and Span output signal levels to the original default settings. P5536.1600 rev A www.trolex.com...
  • Page 41 TX6351 • TX6352 User Manual Relay 1 Function Mode Relay 2 Function Mode • This item will appear in the menu on the Contact Output version only. • The operating function of each relay can be independently setup. Checkpoint The general relay function will be reversed when monitoring oxygen deficiency (i.e.
  • Page 42 To Reset a Latched Relay Press L to view Relay Status Checkpoint A Relay will stay LATCHED if the initiating signal has not receded. P5536.1600 rev A www.trolex.com...

  • Page 43: Modbus

    TX6351 • TX6352 User Manual 4.4.4 Modbus RS485 Output • The protocol characteristics required for the Modbus datacomms version can be setup. Sentro can then be integrated into a wider communication network or to interface with a PC or SCADA system.
  • Page 44 RS485 Modbus version of Sentro. Checkpoint • The Contact Output version of Sentro 1 is also equipped with two relays • The Activation will operate in the same way • The Relay Function mode can also be setup Section 4.4.3 P5536.1600 rev A www.trolex.com...
  • Page 45 TX6351 • TX6352 User Manual STEL and TWA • Toxic gas sensing Sentro eModules are equipped to automatically calculate STEL and TWA limits in accordance with international EH40 recommendations • The Alert can be set to ON or OFF • The accumulated STEL and TWA data can be reset to zero ready for the start of a new working period.

  • Page 46: Support

    4.4.6 Support If you need technical support to operate this product, or would like details of our after sales technical support packages, contact service@trolex.com. P5536.1600 rev A www.trolex.com...

  • Page 47: Diagnostics And Maintenance

    TX6351 • TX6352 User Manual Diagnostics and Maintenance 5.1 Diagnostic Messages Sensor over-range Loss of signal from the sensor Pellistor Over • The gas sensing concentration exceeds 100% LEL which is the safe working limit of the sensing element. • The transmitted output signal from the sensor will be clamped at full...

  • Page 48: Maintenance

    • Service history is logged within the module and this data is used to periodically assess its condition whenever it is returned for servicing. Simply insert the new module into the instrument and return the original for checking and calibration. P5536.1600 rev A www.trolex.com...
  • Page 49 Annual Safety Check The main sensor unit 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. Calibration The Sentro 1 performs an important safety function and periodic calibration is an essential part of maintaining safety integrity.
  • Page 50 Checkpoint • test gas must be combined with balance air if being used to calibrate pellistor based devices. • 25% O cannot be shipped by air transport, so a concentration below 23% would be supplied. P5536.1600 rev A www.trolex.com...

  • Page 51: Maintenance And Calibration Log

    TX6351 • TX6352 User Manual 5.3 Maintenance and Calibration Log Order Reference: TX Serial Number: Date Purchased: Gas Type: Location: Scheduled Change Return Date Fault Recalibrate Comments Check Modules to Trolex www.trolex.com P5536.1600 rev A...

  • Page 52: Disposal

    The end of its useful life is to be determined by the owner/ operator of the equipment and not Trolex. Ensure that the Sentro 1 is recycled by licenced waste contractors with the appropriate licences for handling electronic waste in the geographic area where the Sentro 1 is located.

  • Page 53: Disclaimers

    When devices are used for applications with technical safety requirements, the relevant instructions must be followed. Trademarks © 2015 Trolex® Limited. Trolex is a registered trademark of Trolex Limited. The use of all trademarks in this document is acknowledged. Document History Revision...
  • Page 54 Contact Details Trolex Ltd, Newby Road, Hazel Grove, Stockport, Cheshire, SK7 5DY, UK +44 (0) 161 483 1435 sales@trolex.com...

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