Trolex Sentro 1 TX6351 User Manual

Universal gas detector

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TX6351 • TX6352

Sentro 1 Universal Gas Detector

Leading safety technology

P5536.1600 rev D

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Page 1 TX6351 • TX6352 Sentro 1 Universal Gas Detector Leading safety technology P5536.1600 rev D...
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 Sentro eModules 4.4.3 Output 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. Supply Voltage: 12 V dc from an Underground Mining and Tunnelling approved power source Ex ia I Ma Type of protection: TX6351.01i Intrinsically safe.
Page 6: Dimensions
Dimensions P5536.1600 rev D...
Page 7: Technical Information
TX6351 • TX6352 User Manual Technical Information Ambient temperature limits -20 to +40 °C Storage temperature -20 to +60 °C Ambient pressure 800 to 1100 mbar Humidity 15 % to 90 % non-condensing Protection classiﬁcation Dust and waterproof to IP65. Gas Port: IP54. Housing material Reinforced polymer with static charge dissipation Nett weight...
Page 8 Alarms Programmable GENERAL alarms and HIGH alarms with an LED indicator. The two adjustable alarm setpoints are preset during manufacture to default values appropriate to the type of sensor, determined by the sensing module being used. STEL and TWA Automatic setting of STEL and TWA limits to EH40 standards.
Page 9: Electrical Details
TX6351 • TX6352 User Manual 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: at 24 V Type of sensor: Toxic Flammable Infrared Supply current: 40 mA 40 mA 60 mA...
Page 10 Mining and Tunnelling TX6351 3/4 wire. Remote powered 4 to 20 mA analogue output Supply voltage: 10 to 14 V Max. line load: maximum @ 12 V dc Type of sensor: Toxic Flammable Infrared Supply current @ 12 V: 48 mA 70 mA 91 mA TX6351...
Page 11: Sentro Emodules
TX6351 • TX6352 User Manual Sentro eModules Plug-in pre-calibrated modules with standardised output data. • Each module stores all the necessary data about its type identiﬁcation, sensing range and speciﬁc calibration. This data is automatically recognised by Sentro when the module is loaded into the module bay. •...
Page 12 Flammable gases • Poison resistant catalytic sensor INDICATIVE VALUES ONLY, OTHER RANGES AND CALIBRATIONS CAN BE SUPPLIED TO SPECIFICATION The sensor can be conﬁgured to respond to many ﬂammable gases and vapours. It is usual to calibrate to methane in Section 4.4.5 terms of %LEL or %volume.
Page 13 TX6351 • TX6352 User Manual oxic gases • Electrochemical cells INDICATIVE VALUES ONLY, OTHER RANGES AND CALIBRATIONS CAN BE SUPPLIED TO SPECIFICATION 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...
Page 14 Toxic gases • Electrochemical cells - continued INDICATIVE VALUES ONLY, OTHER RANGES AND CALIBRATIONS CAN BE SUPPLIED TO SPECIFICATION Selected toxic gas modules are equipped with automatic STEL/TWA calculation in accordance with EH40. Section 4.4.5 TX6350 .254 .254.10 .257 .259 .261 Nitrogen Nitrogen...
Page 15 Periodic calibration of the gas sensor should be carried out whilst it is in service. For oxygen and carbon monoxide gas sensors Trolex recommends that this is carried out every three 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 Carbon Dioxide/Methane Gases • Infrared sensor INDICATIVE VALUES ONLY, OTHER RANGES AND CALIBRATIONS CAN BE SUPPLIED TO SPECIFICATION The sensor is highly speciﬁc to the selected gas and exhibits consistent sensing accuracy with superior long-term stability. The linear response means that it can be calibrated for low gas concentrations and high concentrations up to 100% by volume.
Page 17 TX6351 • TX6352 User Manual Checkpoint - Carbon Dioxide Sensors Normal atmosphere contains carbon dioxide which will a ect 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
2. Certification and Conformity 2.1. Newer Sentro 1 models with red label (designated .35) ATEX certification for use in underground mines (Group I) in European Union. Complies with ATEX Directive 2014/34/EU. Standards: EN IEC 60079-0:2018 EN 60079-11:2012 UKEX certification for use in underground mines (Group I) in Great Britain (England, Scotland and Wales).
Page 19 TX6351 • TX6352 User Manual Product Code: Ex Certificate Number: Ex Certification Code: TX6351.01i.xx.35.19 CML 20ATEX2271X I M1 Sentro 1 IECEx CML 20.0158X Ex ia I Ma TX6352.01i.12.35.19 CML 21UKEX2323X -20 °C ≤ Ta ≤ +40 °C Sentro 1 TX6351.01i.xx.35.05 Sentro 1 MASC M/21-8496 X Ex ia I Ma...
Page 20: Older Sentro 1 Models With
The following Specific Conditions of Use apply to the certificates listed above: The cable entries to the supply and output terminals shall be made via cable glands which • provide a minimum degree of protection of IP54. Under certain extreme circumstances, unearthed metal parts of the enclosure may store an •...
Page 21 TX6351 • TX6352 User Manual Product Code: Ex Certificate Number: Ex Certification Code: TX6351.01i.xx.19 I M1 Sentro 1 Sira 09ATEX2352X Ex ia I Ma TX6352.01i.12.19 IECEx SIR 09.0147X -20 °C ≤ Ta ≤ +40 °C Sentro 1 TX6351.01i.xx.06 Sentro 1 Ex ia I Ma IECEx ITA 14.0006X -20 °C ≤...
Page 22 It is recommended to periodically check the condition of the product. The product shall only be serviced and repaired by Trolex Ltd or a local Trolex service agent approved by Trolex Ltd in order to maintain the explosion protection of the product.
Page 23: Installation
TX6351 • TX6352 User Manual Installation Safety Precautions It is recommended that users refer to EN / IEC 60079-29-2 for guidance on the selection, installation, use and maintenance of detectors for ﬂammable gases and oxygen, when installed in hazardous areas. 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.
Page 24 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. The table below shows the response variation of the catalytic combustion sensor on exposure to a range of gases and vapours at the same %LEL concentration.
Page 25: Tools And Test Equipment Required
A very important part of an e cient 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 26: Connections
Connections 3.4.1 0.4 to 2 V / 2 to 10 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. The connection conﬁguration works well up to 5-100 m distance between the sensor and the monitoring equipment, dependent on cabling...
Page 27: To 20 Ma Analogue
TX6351 • TX6352 User Manual 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 28: Contact Output Signal
3.4.4 Contact Output Signal Dual independent output contacts for remote signalling and control. Setpoint values for GENERAL alarm and HIGH alarm are setup during manufacture to prescribed levels appropriate to the type of gas intended to be monitored; determined by the gas sensing module.
Page 29: 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: Modbus Connection mode: Number of points: 1,000 m Maximum distance: Recommended cable (speciﬁed in BS5308 Part...
Page 30: Connecting In Hazardous Areas
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. TX6642 Intrinsically Safe Power Supply or approved apparatus.
Page 31: Setup And Calibration
TX6351 • TX6352 User Manual Setup and Calibration Controls and Indicators P5536.1600 rev D...
Page 32 P5536.1600 rev D...
Page 33: Main Display
TX6351 • TX6352 User Manual 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 D...
Page 34: Security Code Access
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. Security Code Access A security code may be requested: Press the R key to change the digit Use the L key to increment the digits Use the R key to select Enter and return to...
Page 35: Main Menu
TX6351 • TX6352 User Manual Main Menu Checkpoint Sentro will automatically return to the Main Display if no commands are given within 1 minute. The time limit is extended to 8 minutes during calibration to allow the gas value to stabilise. Prompt Bar Zero Calibrate...
Page 36: Calibrate
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 P5536.1600 rev D...
Page 37 TX6351 • TX6352 User Manual 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 D...
Page 38 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: • Follow the prompt bar and screen instructions Press R to continue with the normal span calibration...
Page 39: Sentro 1 Setup
TX6351 • TX6352 User Manual 4.4.2 Sentro 1 Setup The basic functional characteristics of the sensor can be setup, or reviewed, from a choice of parameters. System Information Display Display Setup • The display backlight illumination may be set to on, or o , to reduce power consumption.
Page 40 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 • A four digit security code can be entered to prevent unauthorised access to the setup menu.
Page 41: Output Setup
TX6351 • TX6352 User Manual 4.4.3 Output Setup The output signal format can be reviewed and setup to preferred values. Output Information • This is the factory setting of the output signal • Conﬁrm acceptance. Trim Output Zero • The level of the transmitted output signal, when the sensor is measuring Zero gas concentration can be trimmed or o set.
Page 42 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. the relay will de-energise when the measured gas concentration recedes from the setpoint value).
Page 43 TX6351 • TX6352 User Manual 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 D...
Page 44: Modbus
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. Data Protocol Modbus Addresses 1 to 255 Format Binary...
Page 45 TX6351 • TX6352 User Manual • The Activation mode and operating level of the setpoints can be setup to preference. Checkpoint • The setpoint output signal data will also be available for transmission on the RS485 Modbus version of Sentro. Checkpoint •...
Page 46 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 47: Support
TX6351 • TX6352 User Manual 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 D...
Page 48: Diagnostics And Maintenance
Diagnostics and Maintenance 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 scale to prevent ambiguous output data from being transmitted and will latch in this condition •...
Page 49: Maintenance
TX6351 • TX6352 User Manual Module Not Fitted • The eModule has been removed and is out for more than 10 seconds Checkpoint • Under-range output signal will be transmitted by the sensor. 5.2 Maintenance Output Signal • Check the accuracy of the sensor at pre-determined intervals by injecting a test gas Gas Sensing Modules...
Page 50 Gas sensors have a known ZERO and SPAN movement related to time, level of exposure to gas, and the nature of the environment, so Trolex recommend that the sensors should be bump tested with a suitable test gas at regular intervals. This should be carried out in accordance with best practice for the industry where the gas sensor is being used.
Page 51 Please call our sales engineers for advice regarding recommended test gas procedures and product support plans. Test gas equipment may be ordered from Trolex using the order code: P5393.23. The kit is comprised of a 0.5 litre/min gas regulator, pipe-work and gassing hoods.
Page 52: Maintenance And Calibration Log
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 P5536.1600 rev D...
Page 53: Disposal
TX6351 • TX6352 User Manual 5.4 Disposal Part of the ethos of Trolex is sustainable design. Sentro 1 contains materials that can be recovered, recycled and reused. At the end of its useful life ensure that the Sentro 1 is recycled in accordance with local laws and bylaws for the geographic area where it is located.
Page 54: Trademarks
Trademarks © 2023 Trolex® Limited. Trolex is a registered trademark of Trolex Limited. The use of all trademarks in this document is acknowledged. Document History Revision Date 25 April 2017 4483 29 March 2019 4828 25 January 2023 5416 06 February 2023...
Page 55 TX6351 • TX6352 User Manual Trolex Ltd. Newby Road, Hazel Grove, Stockport, Cheshire SK7 5DY, UK P5536.1600 rev D t: +44 (0)161 483 1435 e: Sales@trolex.com www.trolex.com...

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