Trolex Sentro Wireless TX6355 User manual

TX6355
Sentro Wireless

TX6355 User Manual
www.trolex.com
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TX6355 Sentro Wireless
Contents
1. Product Overview 4
1.1 Operating Features 4
1.2 Application 5
1.3 Product Options 5
1.4 Dimensions 6
1.5 Technical Information 7
1.6 Electrical Details 8
1.7 Sentro eModules 9
1.7.1 Sentro eModules 9
1.7.2 MSHA Certified eModules 9
2. Certification 12
2.1 United States of America
(MSHA) 12
2.2 South Africa (MASC) 13
2.3 Australia -IECEx 13
3. Installation 15
3.1 Safety Precautions 15
3.2 Tools and Test
Equipment Required 16
3.3 Siting Recommendations 16
3.4 Connections 17
3.5 Connecting in Hazardous
Areas 17
4. Setup and Calibration 18
4.1 Controls and Indicators 18
4.2 Software Menus 20
4.3 Navigation 21
4.4 Power-up 22
4.5 Main Menu 23
4.5.1 Calibrate 24
4.5.2 TX6355 Setup 27
4.5.3 Modbus Address 32
4.5.4 Module Setup 34
4.5.5 CommTrac 38
4.5.6 Exit 44
4.6 Support 44
5. Diagnostics and Maintenance 45
5.1 Diagnostic Messages 45
5.1.2 Sensor Negative Drift 46
5.1.3 Recovery from Display
Freeze 46
5.2 Maintenance 47
5.2.1 Introduction 47
5.2.2 Sentro Wireless Gas Inlet
Port - Check and Clean 48
5.2.3 Sentro Wireless - Bump Test 48
5.2.4 Sentro Wireless Batteries –
Replace 49
5.2.5 Sentro eModule - Calibrate 49
5.2.6 Sentro Wireless - Safety
Check 50
5.2.7 Sentro eModule - Replace 50
5.3 Recommended Test Gas
Concentrations 51
5.4 Disposal 52
5.5 Maintenance Records 52
5.6 Maintenance and
Calibration Log 53
Disclaimers 54
Trademarks 54
Document History 55
Contact Details 55

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1. Product Overview
TX6355
Digital wireless output signal
Can be used with any Sentro eModule
Built in battery pack
1.1 Operating Features
•Fixed sensor for the detection of toxic gases and flammable gases
•Exclusive pre-calibrated plug-in gas sensing modules for many types of gas and
climatic conditions
•LCD readout and visual LED alarm indicators
•Strata specific digital wireless output signal
•Battery powered operation from built in battery pack
•Heavy duty housing to IP65, EMC compliant
•Simple, easy to use menu structure
•Easy integration into legacy wireless networks

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1.2 Application
Fixed point gas detection for safety monitoring in hazardous areas and general
purpose applications.
Underground Mining and Tunnelling
Ex ia
TX6355
Supply Voltage: 6 V dc from built in
battery pack
Type of protection:
Intrinsically safe. Ex ia
1.3 Product Options
Mining Ex: Supply Voltage:
TX6355.03 General Purpose - 6V dc from built in battery pack
TX6355.04.01 MSHA Approved - 6V dc from built in battery pack
TX6355.04.02 MSHA Approved and QPS Performance Approved 6V dc
from built in battery pack
TX6355.05 MASC Approved - 6V dc from built in battery pack
TX6355.06 Australia certified - 6V dc from built in battery pack
A choice of Sentro eModules for sensing a range of toxic and flammable gases.
See pages 9 to 14 for details of compatible Sentro eModules.

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1.4 Dimensions

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1.5 Technical Information
Ambient temperature limits -20°C to +40°C
Storage temperature -20°C to +60°C
Ambient pressure 800 to 1100 mbar
Humidity 90% non-condensing
Protection classification Dust and waterproof to IP65. Gas Port: IP54.
Housing material Reinforced polymer
Nett weight 1400 g
Cable entries None
Information display 128 x 64 dot graphic backlit LCD
Vibration limits
Vibration limits (EN 60079-29-1):
• 10 to 30 Hz - 1.00 mm total excursion
• 31 to 150 Hz - 19.6 m/s2acceleration peak
Impact limits 20 joules (housing)
Calibration and setup
Digitally controlled ZERO and SPAN pushbutton
setting
Signal fix
The analogue output signal of the sensor is fixed
during calibration to prevent false alarms from
being initiated
Fault indication
Under range signal transmitted and fault display
for:
• Loss of communications from the sensing
module
• Sensing module absent for more than 10
seconds
• Negative drift below zero, 10% full scale
• Sensor over-range protect
Key coding
Coding stops prevent insertion of a non-valid
sensing module.
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.

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Output signals Strata specific digital wireless output signal
Supply voltage 6V dc from internal battery pack
Current consumption 40 to 45 days life from internal batteries when
suitable eModules fitted. (see section 1.7.2)
Mounting By attachment point on the top of the Sentro
Wireless housing - will accept a standard 25 mm
strap
1.6 Electrical Details
Output signals
Strata specific digital wireless output signal
Supply voltage
6 V dc from internal battery pack
Current consumption
40 to 45 days life from internal batteries when
suitable eModules fitted. (see section 1.7.2)
Mounting By
attachment point on the top of the Sentro Wireless
housing - will accept a standard 25 mm strap

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1.7 Sentro eModules
Plug-in pre-calibrated eModules with standardised output data.
• Each eModule stores all the necessary data about its type identification, sensing
range and specific calibration. This data is automatically recognised by Sentro
when the eModule is loaded into the module bay
• The eModules are pre-calibrated so they can be replaced at any time with a
replacement sensing module - usually of the same type, but an alternative may
be inserted if required
• User configurable coding slots at each module bay can be individually configured
using coding stops to prevent invalid sensing module combinations
• The eModule will identify itself when plugged into the sensor housing and auto
configuration will take place
• All Sentro eModules have two output alarm signals for General alarm and High
alarm. Default values are entered during manufacture and these can be changed
to preferred values
•The alarm signals can be set to illuminate built-in flashing LED indicators
eModule Gas Sensor
1.7.1 Sentro eModules
For information and advice on the full range of Sentro eModules contact the Trolex
Sales Team: [e-mail]
1.7.2 MSHA Certified eModules
Sentro Wireless TX6355 is certified by MSHA for use with the following eModules:

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2. Certification
2.1 United States of America
2.1.1 MSHA Approval
Meets the applicable requirements of Title 30 Code of Federal
Regulations, Part 18 (30 CFR Part 18). Approval No. 18-A150002-0.
For conditions of use refer to the MSHA controlled drawing no.
P5596. 1800.
2.1.2 Pennsylvania Approval
Pennsylvania Approval no. BFE 43-15 has been assigned to the
equipment. Pennsylvania State has determined that the minimum
safe blasting distance is 16.7 feet.
2.1.3 Gas Performance Approval
QPS certification covers the following:
•Sentro Wireless fixed point CO gas detector, model no.
TX6355.04.02, when fitted with a CO sensing eModule with part
no. TX6350.04.250.50 (0 to 50 ppm range) or eModule part no.
TX6350.04.250.500 (0 to 500 ppm range).
•Powered by 4 Energizer E95 D-cell type batteries.
•Indoor use and CO gas only.
•Ambient temperature range of -20°C to +40°C
Note: Only the display and local alarm indications were assessed
during the performance verification. The wireless output function was
not assessed during the performance verification but may be used
for data collection and record keeping functions or other non-safety
related functions.
Applicable Standards
•ANSI/ISA-92.00.01-2010 “Performance Requirements for Toxic
Gas Detectors, Approved 13 January 2011”
•UL 61010-1 “UL Standards for Safety Electrical Equipment for
Measurement, Control, and Laboratory Use; Part 1: General
Requirements –Third Edition; Reprint with revisions through and
including July 15, 2015”.

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This warning symbol on the equipment’s marking plate, Represents,
“Attention – consult accompanying documents”:
Refer to Section 1.7.2 for the list of approved eModules for
Sentro Wireless.
2.2 South Africa (MASC)
Ex certificate number: MASC M/15-0133X Ex certification code:
Ex ia I
Special Conditions of Safe Use (X)
1. May only be used with Energizer EN95/E95 D-type batteries.
2. Outputs #1 and #2 (P5596.01-M sheet 3 of 4) on the Sentro
Wireless configuration must be evaluated for intrinsic safety in its final
configuration when connected to other devices or equipment.
2.3 Australia IECEx
Model TX6355.06.nn is evaluated against the following standards:
IEC 60079-0:2011 Edition: 6.0
IEC 60079-11:2011 Edition: 6.0
Ex certificate numbers: IECEx TRA 16.0016X Ex certificate code: Ex ia I
Ma
Ingress Protection: IP65 except for gas inlet port (IP54)
Conditions of Use / Warnings:
1. Use only with Energizer E95/EN95 D-type Alkaline Cells. These
are wired to screw terminals 4, 5 on J6 Output Board only.
2. The other screw terminals 1, 2, 3, 6 on J6 Output Board shall not
be used in the hazardous area.
3. Only Trolex manufactured gas sensing modules (“eModules”)
identified by the top level part number “TX6350.06” shall be fitted.
The use of these eModules have been assessed for compatibility as
part of this certification and are suitable for use in Group I hazardous
location.

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4. The cover screws must be torqued to a value of 1.24N*m (10in*lbs)
following replacement of the eModules (gas sensor) or batteries.
5. Do not open when coal dust is present.
6. Extreme care must be taken to protect the equipment from impact. In the
event the unit is dropped or impacted, a competent person must inspect it for
any damage that would impair the Ingress Protection (IP54).
7. The batteries must be removed to de-energise the unit before it is
transported /
relocated.
Ex-Certified e-Modules: Appropriate TX6350 e-Modules may be fitted as
assessed

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3. Installation
3.1 Safety Precautions
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. It is permissible to change the Sentro
Wireless batteries whilst in the hazardous area.
Evacuation
If a dangerous level of gas concentration is detected by the instrument, leave the area
immediately.
Flammable
Be aware that some toxic gases are also ‘flammable’ at high percentage
concentrations.
Operating Limits of Catalytic Combustion Sensors
Catalytic combustion sensors positively detect the presence of flammable gas. They
rely upon the presence of oxygen in the atmosphere and should only be used for gas
concentration up to the 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.
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.
Infrared sensors are highly specific to the defined gas type and may not respond to
other similar gases.
Contamination
The response of catalytic combustion gas sensors can be affected by air borne
contaminants which will reduce the sensitivity. Substances such as silicones,
tetraethyl lead, sulphur compounds and phosphate esters can cause permanent
degradation (poisoning). Halogenated hydrocarbons may also cause temporary
inhibition.

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Interference
If the atmosphere to be monitored contains a gas that dilutes or displaces the air,
this may reduce the response of catalytic sensors. Similarly, steam laden
atmospheres and condensation can reduce the stability.
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.
Toxicity
Be aware that most flammable gases and vapours are also toxic at low
concentrations of LEL.
3.2. Tools and Test Equipment Required
No special tools are needed.
3.3. Siting Recommendations
Location of Gas Detectors
Each installation needs to be considered in its own right, with reference to safety
authorities and in compliance with mandatory local safety regulations. The
sensor must be operated in accordance with the User Manual to maintain safety,
reliability and to preserve safety integrity where applicable.
It is important that sensors are located in positions determined in consultation
with those who have specialised knowledge of the plant or installation and of the
principles of gas dispersion. Reference should also be made to those
responsible for the engineering layout and topology of the plant as they will be
most familiar with the nature of the potential dangers and the most likely sources
of gas release.
It is also important to recognise that the characteristics of the gas source can be
influenced by many factors; including the relative density or buoyancy of the gas,
the pressure at the point of release, the ambient temperature and the ventilation
of the site.

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Sensor coverage cannot be simply expressed in terms of ‘number per unit area’.
Sensors need to be sited where they are capable of monitoring those parts of a plant
where gas may accumulate or where a source of gas release is expected
to occur. This way, the earliest possible warning of a gas release can be given to
initiate shutdown functions, alarm functions or safe evacuation of the premises.
Trolex recommends that the Sentro Wireless Gas Detector is positioned a minimum of
6 m (20 ft) and no more than 245 m (800 ft) from a Strata CommTrac C node for the
Sentro Wireless Gas Detector to work effectively.
Sensor Management
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.
STEL and TWA
Selected toxic gas sensors are equipped to automatically calculate STEL and TWA
limits in accordance with COSHH standards. If the facility is selected for use, ensure
that all accumulated data is reset to zero before the commencement of a working
period.
Checkpoint
STEL: Short term exposure limit of total accumulated units over a rolling fifteen
minute period. TWA: Time weighted average of gas concentration over a working
eight our period.
3.4 Connections
The Sentro Wireless sensor connects wirelessly to the Strata CommTrac mine wide
wireless network. Power is provided by batteries contained within the housing. No
hard wiring is required.
3.5 Connecting in Hazardous Areas
Certified Intrinsically Safe for use in underground mine hazardous areas.
The installation must be in accordance with the Sentro Wireless certification
parameters.

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4. Setup and Calibration
4.1 Controls and Indicators

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4.2 Software Menus