Operating Manual - ses

Operating Manual
500
M
T
Multi Technology Gas Detection
Technology
Gases
Infrared
Hydrocarbons
Electrochemical
Toxic + Oxygen
Catalytic
Combustible
CMOS
Toxic & Combustible
SIL 2
LED Type – Single Channel LED Type – Dual Channel DIGIT Type – Single Channel DIGIT Type – Dual Channel P a g e | 2 of 51 Information and relevant technical data contained in this manual are copyrighted and property of IMX S.r.l. This manual and relevant drawing cannot be used for purpose of manufacturing anything represented, nor disclosed to third parties without written approval of IMX S.r.l. IMX S.r.l. will protect its own rights with legal means. IMX S.r.l. reserves the right to modify specifications and drawings without notice. WARRANTY
IMX S.r.l. guarantees all of its products are free from manufacturing defects for a period specified in each order agreed with the customer. IMX S.r.l will repair or replace at its workshop, free of charge, every gas detector or found to be defective during the warranty period. Technical personnel of IMX S.r.l. will determine the cause of damage and condition of replacement. Service or replacement is made as ex works. The warranty is restricted to the cost of the instrument supplied by IMX S.r.l. Any improper use of the instrument carried out by un‐authorized personnel are not IMX S.r.l. responsibilities. All warranties are contingent upon proper use in the application for which the product was intended and do not cover products which have been modified or repaired without IMX’ approval or which have been subjected to neglect, accident, improper installation or application, or on which the original identification marks have been removed or altered. IMX S.r.l. reserves the right to check and verify any claim for any products or components returned as defective. The customer is responsible for all freight charges and taxes due on shipment both ways. For any dispute not solved amicable the competent court is MILANO, ITALY. P a g e | 3 of 51 TableofContents
1.
2.
Warnings .................................................................................................................................................... 5
Introduction ............................................................................................................................................... 6
2.1. General Description ........................................................................................................................... 6 2.2. Technological Innovations and Benefits ............................................................................................ 7 2.3. Applications ....................................................................................................................................... 7 2.4. Block Diagram .................................................................................................................................... 8 2.5. Transmitter ........................................................................................................................................ 8 2.6. Transducers ..................................................................................................................................... 11 2.7. Calibration Kit .................................................................................................................................. 12 2.8. Field Replaceable Parts .................................................................................................................... 12 3. Specifications ........................................................................................................................................... 13
3.1. Outline Drawings: ............................................................................................................................ 13 3.2. Specifications: .................................................................................................................................. 14 3.3. Approvals ......................................................................................................................................... 15 4. Installation ............................................................................................................................................... 16
4.1. Unpacking ........................................................................................................................................ 16 4.2. Mounting Arrangements ................................................................................................................. 16 4.3. Sensor Poisons ................................................................................................................................. 17 4.4. Mounting ......................................................................................................................................... 18 4.4.1. Pole Mounting: ........................................................................................................................ 18 4.4.2. Wall Mounting: ........................................................................................................................ 18 4.4.3. Duct Mounting: ........................................................................................................................ 19 4.4.4. Remote Installation: ................................................................................................................ 20 4.5. Connection....................................................................................................................................... 21 4.5.1. Single Channel – Integrated Transmitter and Transducer ....................................................... 22 4.5.2. Single Channel – Remote Transducer Installation ................................................................... 23 4.5.3. Dual Channel – One Integrated and One Remote Transducers .............................................. 24 4.5.4. Dual Channel – Remote Transducers Installation ................................................................... 25 4.6. Power Up ......................................................................................................................................... 26 5. Operation ................................................................................................................................................. 26
5.1. LED Display ...................................................................................................................................... 26 5.1.1. LED ‐ Sequence 1 ‐ Start Up ..................................................................................................... 28 5.1.2. LED ‐ Sequence 2 ‐ Normal Operation ..................................................................................... 29 5.1.3. LED ‐ Menu Commands ........................................................................................................... 30 5.1.4. LED ‐ Sequence 3 ‐ Calibration ................................................................................................. 31 5.1.5. LED ‐ Sequence 4 ‐ Fault .......................................................................................................... 32 P a g e | 4 of 51 5.2. Digit Display ..................................................................................................................................... 33 5.2.1. Digit ‐ Sequence 1 ‐ Start Up ................................................................................................... 34 6.
5.2.2. Digit ‐ Sequence 2 ‐ Normal Operation ................................................................................... 34 5.2.3. Digit ‐ Menu Commands .......................................................................................................... 35 5.2.4. Digit ‐ Sequence 3 ‐ Calibration ............................................................................................... 36 5.2.5. Digit ‐ Sequence 4 ‐ Fault ......................................................................................................... 36 Maintenance ............................................................................................................................................ 39
6.1. Routine Maintenance ...................................................................................................................... 40 6.2. Sensing Element Replacement ........................................................................................................ 40 6.3. Transmitter Factory Defaults ........................................................................................................... 41 6.4. Change Transmitter Settings ........................................................................................................... 41 6.5. Order Code ...................................................................................................................................... 42 6.6. Storage ............................................................................................................................................. 44 7. MODBUS .................................................................................................................................................. 45
7.1. MODBUS Connection ....................................................................................................................... 45 7.2. MODBUS Exception Codes .............................................................................................................. 46 7.3. MODBUS Read/Write Commands ................................................................................................... 46 7.4. Register Mapping ............................................................................................................................. 46 8. HART ........................................................................................................................................................ 48
9. Safety Function Requirements “IEC 61508” ............................................................................................ 48
9.1. Conditions for Safe Operating ......................................................................................................... 48 9.2. Failure Rate Data ............................................................................................................................. 49 P a g e | 5 of 51 1. Warnings
Failure to follow all safety precautions and instructions may result in property
damage, serious injury or death to you or others. People’s lives depend on your safe installation of our products. It is important to follow all instructions supplied with the products. This device is to be installed by a trained electrician who is thoroughly familiar with the International Electric Code and will follow the IEC guidelines, European ATEX Directive 94/9/EC as well as local codes. The selection of the mounting location for the device, its controls and routing of the wiring is to be accomplished under the direction of the Facilities Engineer and the Safety Engineer. In addition, listed below are some other important safety instructions and precautions you should follow: 
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Read and understand all instructions before installing or operating this equipment.
This equipment must be installed and maintained by qualified person in accordance with all
International and local Electrical Codes, especially relevant standard for electrical installation in
hazardous areas classified for explosive gas and/or dust atmospheres.
Do not connect this unit to the system when power is on.
Only approved spares supplied by the manufacturer shall be used.
IP65 degree of protection is guarantee only if the O‐rings are fitted, the integrity of the O‐rings shall
be checked periodically.
Fittings used for cable entries shall confirm to EN 60079‐0; EN 60079‐1; EN 60079‐31 standards and
shall have an IP65 protection degree suitable with declared IP degree of the equipment.
Any accumulation of dust over the equipment shall be avoided (never over 5mm)
Whenever it is necessary to unscrew the cover or any other threaded element is necessary to verify
the integrity of the threaded parts before tightening again. Cover and sintered filter cap shall be
opened only after unscrewing the safety blocking Allen screws, these screws shall be tightened again
before energizing or restarting the transmitter.
Equipment shall be connected to the plant earthing system (minimum 4mm2 wire)
After installation, test with applying reference gas to ensure proper operation.
Show these instructions to your Safety Engineer and then file them in a safe place and refer to them
when maintaining and/or reinstalling the unit.
Consult the authority having jurisdiction in your area regarding the proper use and installation of this
product.
P a g e | 6 of 51 2. Introduction
2.1. GeneralDescription
SMART MT500 Gas Detector represents the state‐of‐the‐art in gas detection, as it uses a breakthrough technology that makes it a unique device, with the best response in gas detection, flexible configuration and interchangeability of elements without any software modification. In fact, models of MT500 are made up of a dual‐channel transmitter with a wide range of “plug‐in” sensing elements in SS316 housing, designed to allow a fast “hot field replacement” of the sensing element without removing power supply and/or interfere with detection system. MT500 detectors are made from two major parts, transmitter and transducer, having a unique transmitter for all kind of transducers “auto configuration according to transducer and sensing element” makes the maintenance much easier and faster and reducing spare parts cost. Transmitter Transducer P a g e | 7 of 51 2.2. TechnologicalInnovationsandBenefits
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Two 4‐20mA Analogue Outputs for Single or Double Sensing Element:
In case of double channel sensors (same or different principle of gas detection): halved cabling and
instrument costs.
Robust against noise interferences: the presence of a SIGNAL TRANSDUCER within the same housing
of sensor body permits the sensor installation up to a distance of 300 meters from the transmitter,
without any signal loss. Information coming from the sensing element is processed by the transducer,
boosted and then sent to the transmitter to convert the signal in standard units.
Sensing element and transducer in SS316 Housing: this cage, actually an electromagnetic shield,
further strengthens the signal.
Automatic configuration: the transmitter recognizes the sensing element and configures
automatically all settings (full scale range, type of calibration gas and level …).
Integrated Temperature Sensor: knowing sensing element working temperature, signal is stabilized
with a very low drift effect of temperature variation.
2.3. Applications
Special attention and more than 10 years of continuous research have been dedicated to the design of MT500 Detector in order to save lives and protect people, plants and capitals. This is a list of applications, though not comprehensive: o
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Gas & Oil Production Platform
Petrochemical Plants
Refineries
Drilling Platforms & Rigs
LNG/LPG Plants
Power Plants
Turbo Generators & Compressors
Ammonia Plants & Conservation
Processing & Storage Facilities
Solvent Recoveries Plants
Desulphurization Plants
Painting Facilities
Wastewater Treatment
Food & Beverage
Pharmaceutical
P a g e | 8 of 51 2.4. BlockDiagram
2.5. Transmitter
The transmitter electronics, based on a powerful RISC microprocessor, displays the overcoming of warning/alarm thresholds and monitors continuously the voltages of loop stages and all possible fault conditions, such as short circuit or sensing element breaking or voltage threshold. All electronic devices on transmitter and integrated remote sensor are able to exclude themselves in case of anomalies. Each transmitter can mount four (4) different types of interchangeable displays: single or double DIGIT type, single or double LED type. The extreme versatility of Smart MT500 allows with same firmware to change the display, from LED to digit and vice versa. All front panels of MT500’s different models are made in anodized alloy of aluminum; therefore they are all rust‐proof. Both LEDs and digits have high efficiency and high luminescence, in order to reduce energy consumption and increase performances. Transmitter housing can be marine grade epoxy painted light‐alloy or Stainless Steel. P a g e | 9 of 51 LED Type – Single Channel LED Type – Dual Channel DIGIT Type – Single Channel DIGIT Type – Dual Channel P a g e | 10 of 51 P a g e | 11 of 51 2.6. Transducers
The MT500 transducers family includes the following models: 1) HC CAT: with Catalytic Bead for hydrocarbons and H2 (explosive gases)
2) HC IR: with Infrared Cell for hydrocarbons and CO (not H2)
3) TX ECC: with Electrochemical Cell for toxic gases such as H2S, NH3, CO, SO2 … and also O2
4) TX MOS: with Nanotechnology Metal Oxide Sensor Cell for toxic gases such as H2S …
All MT500 Transducers are fabricated from two separable mechanic parts: this allows changing only the sensing element and not the Transducer nor Transmitter, in a simple and fast way in field (plug‐out, plug‐in). The sensors host various cells of measurement depending on the gas and range to be detected; all cells are assembled on a plug‐in transducer, with the task of transforming the information coming from sensing element into a format that will be transported to the transmitter through a specific CRC protected protocol. The transmitter will then elaborate the data in order to give all information about detected gas, temperature, cell unified ID and serial number. The cells are physically separated from the transducer by gold‐plated pins. Cell and transducer are always encased in SS316 housing, resistant to aggressive agents proper to ON‐SHORE and OFF‐SHORE industrial plants. A replaceable Sintered Filter Cap provides the correct functioning of the device with low maintenance costs. Detected gas will pass through a Sintered Filter Cap, which act as a flame arrester, while the internal part is protected from atmospheric agents by an O‐ring (seal ring). A safety screw in stainless steel 316 locks the cap which holds the sintered filter cap screwed on transducer body. With a special tool supplied with MT500 Detector, the safety screw (2) can be unscrewed in order to remove the mechanical protection and clean the sintered filter with solutions, compressed air or pressurized water. Figure 1: Section of Sintered Filter Cap P a g e | 12 of 51 All sensors are designed with innovative low consumption technology, therefore there’s no need for huge power supplies in plant Note: The firmware is designed to provide continuous diagnostics, guiding the operator through a simple and safe commissioning phase. Calibration will be quick and easy, with a suggested reference gas at 50 % full scale. 2.7. CalibrationKit
With the aim to reduce maintenance logistic problems, a special calibration kit has been designed with integrated flow regulator. 2.8. FieldReplaceableParts
The innovative electronics of MT500 is able to locally exclude power supply to the sensing element through a specific non‐invasive procedure. This allows sensing element to be replaced in Classified Areas. Note: Sensing elements can be replaced or changed only within the type of sensor (CAT/IR/TX‐ECC/TX‐MOS). P a g e | 13 of 51 3. Specifications
3.1. OutlineDrawings:
Transmitter Transducer Splash Guard P a g e | 14 of 51 3.2. Specifications:
Transmitter
Max. Consumption per channel LED Display DIGIT Display Operating Voltage Supply voltage ripple & noise max. Supply fuse rating Analogue output Range Analogue output termination resistance (including total cable resistance) Analogue output fuse rating Dry contacts current rating Operating Humidity R.H. Operating Temperature Weight (approximately) Size (Height/Length/Width ) mm Material Color Environment Protection (IP) W 0.7 0.9 10Vdc to 30Vdc
1V 500mA
0‐22mA
0‐750 Ohm
63mA
150mA
0% to 100%
‐40°C to +80°C
1.6kg
(3kg SS316) 129/126/145
Copper Free
Light Alloy Optional SS316 RED : RAL3000
YEL : RAL1003 BLU : RAL5015 Marin Grade Epoxy Painted (N.A. for SS316) 65 Transducer IR InfraRed CAT Catalytic MOS Nano MOS EC Electro_ chemical W
0.35 W
1.5 W 1 W
0.05 5Vdc ± 5% 0.1V Guarantee by transmitter Electronic auto FUSE inside transmitter
Not Applicable Not Applicable 0% to 95%
‐40°C to +80°C
Not Applicable Not Applicable 0% to 100%
0% to 95% 15% to 90%
‐40°C to +80°C ‐40°C to +65°C ‐40°C to +60°C
400 g 86/47/47 SS316 Not Applicable 65 P a g e | 15 of 51 3.3. Approvals
Transmitter ATEX Temperature Class T6 / T85°C BVI 13 ATEX 0078 X Transducer BVI 13 ATEX 0008 X IR CAT MOS InfraRed Catalytic Nano MOS For Ambient Temperature ‐40°C to +65°C For Ambient Temperature ‐40°C to +65°C EC Electrochemical For Ambient Temperature ‐40°C to +60°C II 2G Ex db IIC T6 II 2D Ex tb IIIC T85°C Db IP65 Note: In case of using electrochemical transducer, if transmitter and transducer are installed in the same area, operating temperature will follow transducer and not transmitter. When transducer is installed remotely on remote J.B., between J.B. and transducer, the lower operating temperature should be considered. Transmitter ATEX Temperature Class T5 / T100°C BVI 13 ATEX 0078 X Transducer BVI 13 ATEX 0008 X IR CAT MOS InfraRed Catalytic Nano MOS For Ambient Temperature ‐40°C to +80°C For Ambient Temperature ‐40°C to +80°C For Ambient Temperature ‐40°C to +65°C EC Electrochemical For Ambient Temperature ‐40°C to +60°C II 2G Ex db IIC T5 II 2D Ex tb IIIC T100°C Db IP65 Note: In case of using electrochemical/Nano MOS transducers, if transmitter and transducer are installed in the same area, operating temperature will follow transducer and not transmitter When transducer is installed remotely on remote J.B., between J.B. and transducer, the lower operating temperature should be considered. Means compliance with ATEX.
II 2G 2D Ex db tb IIC IIIC T6 or T5 T85°C or T100°C Equipment intended for use in places different from underground parts of mines and parts of surface
installations of such mines, but liable to be endangered by explosive gas and dust atmospheres.
Equipment intended for use in explosive atmospheres classified as ZONE 1/2 due to presence of gas.
Equipment intended for use in explosive atmospheres classified as ZONE 21/22 due to presence of dust.
Symbol for electrical equipment
Flameproof enclosure
Protection by enclosure
Symbol of the gas group
Symbol of the dust group
Temperature class for gas
Temperature class for dust
P a g e | 16 of 51 4. Installation
Any type of gas is heavier or lighter than the air, so mostly the sensor should be installed at the level which
is not easy accessible for maintenance or local verification. Combustible gases are lighter then air, they can
be measured by Infrared, Catalytic or Nano Metal Oxide Semiconductor sensors, and they must bust
installed at 30 cm from grade, please see the Mounting Arrangements. Toxic gases are heavier than air and
are measured by electrochemical and Nano Metal Oxide Semiconductor sensors. In that case, the sensors
must be installed between 50 cm and 1,5 m from leakage source.
Hazardous Locations Installation Guidelines for Safe Use
For non-intrinsically safe Ex mb [ib] installations, ensure that the sensor is properly threaded into a suitable
explosion-proof rated junction box with a downward pointing female 3/4" NPT threaded connection. The
sensor should be threaded at least 5 full turns until tight, with the locking screw facing forward. Avoid use
of Teflon Tape, or any type of non-conductive pipe thread coating on the NPT threaded connection.
These sensors meet ATEX and SIL2 standards.
P a g e | 17 of 51 2.2 Sensor Placement
Sensor location is critical to the overall safe performance of the product. Five factors play an important role in
selection of sensor locations:
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Density of the gas to be detected
Most probable leak sources within the industrial process
Ventilation or prevailing wind conditions
Personnel exposure
Maintenance access
Density
Placement of sensors relative to the density of the target gas is such that sensors for the detection of heavier
than air gases should be located within 4 feet of grade as these heavy gases will tend to settle in low lying
areas. For gases lighter than air, sensor placement should be 4 to 8 feet above grade in open areas or in pitched
areas of enclosed spaces.
Leak Sources
The most probable leak sources within an industrial process include flanges, valves, and tubing connections of
the sealed type where seals may either fail or wear. Other leak sources are best determined by facility
engineers with experience in similar processes.
Ventilation
Normal ventilation or prevailing wind conditions can dictate efficient location of gas sensors in a manner
where the migration of gas clouds is quickly detected.
Personnel Exposure
The undetected migration of gas clouds should not be allowed to approach concentrated personnel areas such
as control rooms, maintenance or warehouse buildings. A more general and applicable thought toward
selecting sensor location is combining leak source and perimeter protection in the best possible configuration.
Maintenance Access
Consideration should be given to providing easy access for maintenance personnel and the consequences of
close proximity to contaminants that may foul the sensor prematurely.
Additional Placement Considerations
The sensor should not be positioned where it may be sprayed or coated with surface contaminating substances.
Painting sensor assemblies is prohibited.
Although the sensor is designed to be RFI resistant, it should not be mounted in close proximity to highpowered radio transmitters or similar RFI generating equipment.
When possible mount in an area void of high wind, accumulating dust, rain, or splashing from hose spray,
direct steam releases, and continuous vibration. If the sensor cannot be mounted away from these
conditions .
Do not mount in locations where temperatures will exceed the operating temperature limits of the sensor.
Where direct sunlight leads to exceeding the high temperature-operating limit, use a sunshade to help reduce
temperature.
P a g e | 17 of 51 4.1. Unpacking
After unpacking the device, examine it carefully for possible damage that may have occurred during transportation. If found the detector damaged, immediately file a claim with the carrier stating the extent of the damage. Carefully check all shipping labels and tags for special instructions before removing or destroying them. 4.2. MountingArrangements
Selection of sensor location is critical to the overall safe performance of the product, at least following points should considered: 4.2.1.Check if selected sensor is correct type for that position. 4.2.2.Check the molecular weight, density, or specific gravity of the target gas with air and
accordingly : 4.2.3.When positioning the sensor, take care for maintenance accessibility and poisoning possibility should considered and always sensor should position to point straight down and also take special attention to followings: Never paint the sensor.
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Do not install in direct sight of steam or any contaminating source.
Even if sensors are EMC tested, should not place nearby high‐powered radio transmitters.
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Do not mount in locations where temperatures will exceed the operating temperature limits of
the sensor. Where direct sunlight leads to exceeding the high temperature‐operating limit, use a
sunshade to help reduce temperature.
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In Harsh Environments “heavy rain, windy, dusty ambient …” use of Splashguard became necessary.
4.2.4.Always examine the possible source of gas leakage, normally if is nearby the flanges, valves, and tubing connections “anywhere that sealing may fall” 4.2.5.As gas vapors will move by air moving, if it is possible it should take in consideration for correct positioning, specially take attention to gas cloud migration to concentrated personnel areas such as control rooms, maintenance or warehouse buildings 4.3. SensorPoisons
Sensing elements can be inhibited by poisoning gas, below table for detail of poisons. Loss of sensitivity may be gradual, if the poisons are present in very low concentrations, or rapid in the event of large concentrations of poisons being present.
The presence of poisons and damaging vapours does not imply that the MT500 sensor may not be used in these locations. A careful analysis of ambient air conditions should be undertaken and the customer should be aware that sensor calibration might need to be repeated at shorter intervals. Sensor Type Catalytic Poisoning Substance • Volatile sulphur and phosphourous compounds (especially H2S and SO2)
 Halogenated hydrocarbons (refrigerants, CFCs)
 Compounds that polymerise on the beads
 Organometallic compounds: e.g. Tetraethyl lead
 Silicones contained in grease or aerosols are the most common coating agents that
are not true sensor poisons, but reduce sensor response.
 Corrosive substances (HCl, NO2, Cl2)
P a g e | 18 of 51 4.4. Mounting
The gas detector can be mount on any relatively flat surface capable of supporting the detector’s weight. Conduit connection can made to the ¾” NPT threaded openings at left or right of the housing. When mounting on a pole, secure the Junction Box to a suitable mounting plate and attach the mounting plate to the pole using U‐Bolts. (Pole‐Mounting brackets are available separately.) 4.4.1. PoleMounting:
To mount the transmitter on 2” pole, a special mounting kit is available “optional”. 4.4.2. WallMounting:
For wall mounting use expansion bolts with 6mm diameter. P a g e | 19 of 51 4.4.3. DuctMounting:
In case of duct mounting, it is possible to install transducer with distance from transmitter “max 300mt”, this configuration gives the possibility to operator to have transmitter in accessible position for reading and calibration, a special sampling unit is available on request. P a g e | 20 of 51 4.4.4. RemoteInstallation:
Any type of gas is heavier or lighter than the air, so mostly the sensor should be installed at the level which is not easy accessible for maintenance or local verification, for this IMX srl has develop a special EMI protected protocol which allows to install any technology of gas detection remotely up to 300 meters from transmitter with only 0.75mm2 cable. Housing colors for remote J.B. will be according detection gas. Having two channels transmitter and giving the possibility to install any type of transmitter
remotely, made it easy to install transmitter in ergonomic height but the transducer as close as
possible to hazard source.
Having this characteristics, there are many possibilities for remote installation, as an
example, it is possible to mount a combustible gas sensor using an IR type transducer
connected directly to the transmitter positioned at top of pole in order to detect Methane
gas, the same transmitter is used to connect to remote Nano-MOS transducer installed in bottom
of pole in order to detect H2S gas which is heavier than air, on the same pole it is possible to install
a flasher and siren to give the alarm. Maintenance can easily read the transmitter display and
give the calibration command easily without needs to access to not easy positions!
P a g e | 21 of 51 4.5. Connection
Do not connect wires when circuits are energized. International Electrical Code, as well as local codes, must be followed during installation of this unit. All electrical wiring must be routed through cable gland/conduit and fittings approved for explosion‐proof installations. Use only 0.75mm2 to 4mm2 (20 to 10 AWG) with shield cables for connection from transmitter to control panel. Strip no more than 4mm (0.15 inch) of wire insulation from the ends of the power leads. In case of remote installation use 0.75mm2 (20 AWG) with shield cable with maximum length of 300mt between transmitter and transducer. Table 1 : Maximum Recommended Length according to Power Cable Size Power Wire Section Maximum Recommended Length 2
mm AWG mt. ft. 0.75 20 500 1600 1 18 800 2600 1.5 16 1500 4900 2.5 12 2500 8200 Note: In case of dual channel transmitter, 0V/Dry Contacts and RS485 MODBUS line are common between channels; the rest of signals are independent for each channel. Follow this table interconnection detail: Pin Connection Note 1 RS485+ MODBUS (Not Available with HART Model) 2 CH2‐SIG (4‐20mA) Only available in dual channel type 3 CH1‐SIG (4‐20mA) 4 +24Vdc CH1
5 FAULT RELAY Normally Closed (open = fault) 6 ALARM RELAY Normally OPEN (close = alarm) 7 WARNING RELAY Normally OPEN (close = alarm) 8 RS485‐ MODBUS (Not Available with HART Model) 9 SHIELD 10 +24Vdc CH2 Only available in dual channel type 11 0V Channel 1 & 2 12 FAULT RELAY Normally Closed (open = fault) 13 ALARM RELAY Normally OPEN (close = alarm) 14 WARNING RELAY Normally OPEN (close = alarm) P a g e | 22 of 51 After installation follow these steps for connections: 
Route wires through the threaded openings using proper Atex certified cable gland into
the unit in accordance with International and Local Electrical Codes. Wire size depends
upon the operating current and the distance from the power source.
Before reinstalling the housing cover, make necessary connections according to required configuration. 
Insert the stripped ends of the wire into the connector as far as they can travel. If stranded
wire is used, be sure that there are no loose strands outside the connector plug that could
touch the adjacent lead.
4.5.1. SingleChannel–IntegratedTransmitterandTransducer
P a g e | 23 of 51 4.5.2. SingleChannel–RemoteTransducerInstallation
P a g e | 24 of 51 4.5.3. DualChannel–OneIntegratedandOneRemoteTransducers
P a g e | 25 of 51 4.5.4. DualChannel–RemoteTransducersInstallation
P a g e | 26 of 51 4.6. PowerUp
Property damage, serious injury, or death could occur if the housing is not closed properly. To reduce possibility of explosion, housing cover must be kept tight while circuits are energized. After verifying the connection according to your configuration, before energizing the sensor, ensure that, the housing is closed and blocking nuts are fasten, then you can energize the device. 5. Operation
A special magnet key is required to operate the sensor, when the sensor is energized, without need of opening the sensor in hazardous area, is possible to give the command simply keeping magnet over indicated position over the display. 5.1. LEDDisplay
As standard, MT500 will supplied by LED type display, on request, DIGIT type display also can supplied. Two type of LED display is available, single channel or dual channel (according to transmitter). A dedicated area on display has foreseen in order to insert detection gas type. For each channel, a dedicated Hall‐Effect magnet sensor is predicted which gives the possibility to the user to do the calibration and maintenance trough a simplified procedure with only one command. Single Channel Display P a g e | 27 of 51 Dual Channel Display On manual following symbols are used: Fix LED Blinking LED P a g e | 28 of 51 5.1.1. LED‐Sequence1‐StartUp
After power‐up, sensor will follow below steps before start reading. L1.1 While sensor energized, POWER led will remain fixed which means power presence. Afterward, transmitter will start to check all internal components; during this step, MAGNET LED will remain steady then at the end of this process, MAGNET LED will turn off. L1.2 Then channel controller will start to recognize connected transducer, during this phase ALARM LED will blinking, at the end of this process, ALARM LED will turn off. L1.3 Following that, channel controller will write the settings to transducer found in previous step, during this period WARNING LED will flash, at the end of this process, WARNING LED will turn off. L1.4 Next, transmitter will configure its operating parameters showing it by blinking FAULT LED, at the end of this process, FAULT LED will turn off. L1.5 By the end, transmitter will apply the wait time needed by sensing element in order to provide stable reading, in this period, MAGNET LED will blink twice a second. At the end of wait time, MAGNET LED will continue to blinking once a second showing the health of sensor. P a g e | 29 of 51 5.1.2. LED‐Sequence2‐NormalOperation
During normal operation, transmitter will follow these steps: L2.1 During normal operation, when there is no gas in area, POWER LED remains steady and MAGNET LED continue to blink once a second. In case that the GAS concentration raise, output analogue signal also raise in proportion of GAS and when the concentration reaches to WARNING level, WARNING LED will turn on, this LED will turn off as soon as GAS concentration goes below the WARNING level, the same will happen for WARNING contact. L2.2 If gas concentration raise and reaches to ALARM level, for the period that the concentration is higher than ALARM level, ALARM & WARNING LEDs will remain on and the contacts remains closed. L2.3 If any problem been detected during operation, which cause sensor not reliable or functioning, the FAULT LED will turn on, please refer to sequence 4 section L4.1, L4.2 and L4.3 L2.4 If the transmitter detect that the reading can altered and the sensor needs to calibrated, a steady CAL. ERR. LED will give the indication, this LED will turn off only after a successfully calibration. P a g e | 30 of 51 5.1.3. LED‐MenuCommands
In normal operation, when there is no WARNING or ALARM, the operator can use the special MAGNET in order to do the calibration or maintenance, without presence of MAGNET, the MAGNET LED should blink once a second in order to show health of sensor, by applying the MAGNET the MAGNET LED could act as two different way:  Remains steady which shows that the MENU is lock and the sensor cannot accept the command.
 Blinks twice a second showing that the command is accepted, keeping the MAGNET over its
position following commands can be given:
o
o
o
o
o
o
o
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When the MAGNET is over its position and sensor accepts the command, the transmitter
start the LAMP TEST by activating in a sequence all the LEDs, this will give the possibility to
the operator to verify if all LEDs are functioning.
CLEAN AIR ‐‐> REF. GAS ‐> FAULT ‐> WARNING ‐> ALARM ‐> CAL. ERROR (repeat the sequence
up to 5 seconds)
Keeping on the MAGNET for at least 5 seconds and not more than 20 seconds, will activate
calibration procedure, an alternative blinking between MAGNET LED and CLEAN AIR LED
recognizes this phase, and removing magnet in this phase will start calibration procedure.
Keeping on the MAGNET between 20 seconds and 30 seconds, will make MAGNET LED
blinking at 2Hz and if removing magnet in this period, transmitter will ignore the command.
Keeping on the MAGNET for at least 30 seconds and not more than 40 seconds, will turn off
the power to the transducer in order to give the possibility to the operator to change sensor
, an alternative blinking between MAGNET LED and FAULT LED recognizes this phase, by
removing magnet, the transmitter will de‐energize the transducer, transmitter will give the
confirmation that the transducer is de energized by making FAULT/WARNING & ALARM LEDs
blinking together at 2Hz.
Keeping on the MAGNET between 40 seconds and 50 seconds, will make MAGNET LED
blinking at 2Hz and if removing magnet in this period, transmitter will ignore the command.
Keeping on the MAGNET for at least 50 seconds and not more than 60 seconds, will reset
calibration parameters, this phase is recognized by alternative blinking between MAGNET
LED and WARNING LED, by removing magnet in this period, indications will remain as before
up to 10 seconds waiting for a confirmation, during this 10 seconds the operator can confirm
the operation by putting again the magnet for short time which makes transmitter to accept
the request and restart the sensor, to ignore the operation, operator should not give the
acknowledge and transmitter will ignore the request after 10 seconds.
Keeping on the MAGNET between 60 seconds and 70 seconds, will make MAGNET LED
blinking at 2Hz and if removing magnet in this period, transmitter will ignore the command.
Keeping on the MAGNET for at least 70 seconds and not more than 80 seconds, will reset
sensor to FACTORY DEFAULT, this phase is recognized by alternative blinking between
MAGNET LED and ALARM LED, by removing magnet in this period, indications will remain as
before up to 10 seconds waiting for a confirmation, during this 10 seconds the operator can
confirm the operation by putting again the magnet for short time which makes transmitter
to accept the request and restart the sensor, to ignore the operation, operator should not
give the acknowledge and transmitter will ignore the request after 10 seconds.
Keeping the magnet more than 80 seconds, makes the transmitter lock the command and
will ignore the presence of magnet, to repeat the MENU, should remove the magnet and
repeat the procedure.
P a g e | 31 of 51 5.1.4. LED‐Sequence3‐Calibration
As factory default, reference gas for calibration is set to 50% of full scale of detection gas type; it is possible to change reference gas concentration with MT500 Configuration Tools using RS485 MODBUS “Non HART Version” or by HART communicator “HART Version”. For calibrating the GAS Sensor, two points needed to settle, Zero and Span. During calibration phase, can cancel the procedure by giving the MAGNET command. The accuracy of the Smart Transmitter depends upon routine re‐calibration which should be carried out at least every 90 days. This procedure is extremely simple and may be carried out by one person aided by prompts from the digital display. Calibration may be completed in less than 5 minutes. All calibration parameters are tested by advanced software routines before being accepted. Any errors detected will be shown on the digital display by means of an appropriate fault code. L3.1 Before start, if you suspect that gases are present in sensor location, sensor should be purge by clean air “flow rate between 2lpm to 5lpm”. Ensure that the instrument has stabilized for at least 1 hour. Starting the calibration, transmitter will start in Zero calibration by showing CLEAN AIR LED steady, during this stage; maintenance should assure that there is no gas in the sensor area. By end zero, CLEAN AIR will turn off. L3.2 After Zero, transmitter will start to do the Span, and wait to the operator to apply reference gas “flow rate between 2lpm to 5lpm”. During this period, REF. GAS LED will blinks; the operator has 3 minutes to apply the gas if this not happens the sensor goes to calibration error and recover last good calibration parameters. As soon as sensor signal reaches to acceptable range defined for each type of gas, the transmitter will start to do span calculation and REF. GAS LED will remain steady. It is important to keep the reference gas flow stable during this phase and when transmitter succeed to calculate Span factor, REF. GAS LED will turn off L3.3 After Span calculation, before start to reading gas, transmitter will wait that the signal return to below WARNING level, in this period CLEAN AIR LED will blink. Again, during this stage, maintenance should assure that there is no gas in the sensor area. At the end, the transmitter will return to its normal operation by turning off the CLEAN AIR LED, if this does not happens by 3 minutes the sensor will goes to calibration error and recover last good calibration parameters. P a g e | 32 of 51 L3.4 If any step of calibration goes wrong and transmitter could not finish calibration satisfactory, Transmitter will recover last good calibration parameters and start to indicate to the operator by blinking CAL. ERR. LED for 5 seconds then keeping it steady. This LED remains active upon next good calibration. Calibration can goes wrong if operator do not follow the mentioned steps or if the sensor could not supply a good signal.
5.1.5. LED‐Sequence4‐Fault
In case of any FAULT, sensor will goes to SAFE sate disconnecting analogue line and will open FAULT contact. L4.1 If any detected problem during operation, which cause sensor not reliable or functioning, the FAULT LED will turn on and remains steady, the same time output current will goes to 0mAmp and FAULT contact will open. Maintenance should change the sensor As Soon As Possible in order to guarantee safety of the plant. L4.2 If transmitter could not communicate with transducer, the FAULT LED start to blink “1Hz” and transmitter will de‐energize the transducer to avoid any damage. Output current remain at 0mA and FAULT relay will open. All connections from transmitter to transducer should verified if problem persist, contact manufacturer for assistance. L4.3 If transmitter found any problem in sensing element, the FAULT LED start to blink “0.5 Hz” and transmitter will de‐
energize the transducer to avoid any damage. Output current remain at 0mA and FAULT relay will open. Try to replace sensing element and in case problem persist, contact manufacturer for assistance. P a g e | 33 of 51 5.2. DigitDisplay
On request, MT500 can be supplied by Digit type display in single channel or dual channel configuration (according to transmitter) with dedicated area on display has foreseen in order to insert detection gas type. For each channel, two dedicated Hall‐Effect magnet sensor are predicted which gives the possibility to the user to do the calibration and maintenance trough a simplified procedure. Single Channel Display Dual Channel Display P a g e | 34 of 51 5.2.1. Digit‐Sequence1‐StartUp
After power‐up, sensor will follow below steps before start reading. D1.1 While sensor energized, POWER led will remain fixed which means power presence, Transmitter start to shown “ ON ” message and afterward, showing firmware revision
as “V***”.
Afterward, transmitter will start to check all internal components; during this step, all digits will fill with “****”.
D1.2 Then channel controller will start to recognize connected transducer, this phase is known by showing “ ***“
D1.3 Following that, channel controller will write the settings to transducer found in previous step, this phase is known by showing “ **“.
D1.4 Next, transmitter will configure its operating parameters, this phase is known by showing “
*“ message.
D1.5 By the end, transmitter will show sensing element type and apply the wait time needed by sensing element in order to provide stable reading, during this phase remaining time in seconds will show on display 5.2.2. Digit‐Sequence2‐NormalOperation
During normal operation, transmitter will follow these steps: D2.1 During normal operation, when there is no gas in area, POWER LED remains steady and reading gas concentration will show on display following by measuring unit first letter. L = L.E.L. P = p.p.m. % = Oxygen percentage A blinking point showing system tick indicates that the sensor is healthy. In case that the GAS concentration raise, output analogue signal also raise in proportion of GAS and when the concentration reaches to WARNING level, “WARN” message will in
alternative the gas concentration will shown on display, this message will goes off as soon as GAS concentration goes below the WARNING level, the same will happen for WARNING contact. D2.2 If gas concentration raise and reaches to ALARM level, for the period that the concentration is higher than ALARM level, “ALAR” message will in alternative the gas
concentration will shown on display, this message will goes off as soon as GAS concentration goes below the ALARM level, the same will happen for ALARM contact. D2.3 If any problem been detected during operation, which cause sensor not reliable or functioning, a disgnostic message will shown on display, please refer to sequence 4 section D4.1, D4.2 and D4.3 P a g e | 35 of 51 D2.4 If the transmitter detect that the reading can altered and the sensor needs to be calibrated, on every couple of second a “CAL.” Alternatively “ERR.” message will
appear to give the indication, this message will disappear only after a successfully calibration. 5.2.3. Digit‐MenuCommands
In normal operation, when there is no WARNING or ALARM, the operator can use the special MAGNET in order to do the calibration or maintenance, by applying the MAGNET a display test sequence will be activated by shifting a full on digit but in case that the menu is LOCKED a “LOCK”
message will appear on display showing that the sensor cannot accept the command. keeping the MAGNET over its position when the menu is not locked following commands can be given: o
o
o
o
o
o
o
o
Keeping on the MAGNET for at least 5 seconds and not more than 20 seconds, a “>CAL”
message will shown on display removing magnet in this period will activate calibration
procedure.
Keeping on the MAGNET between 20 seconds and 30 seconds, a relative time counter is
shown in this period, if removing magnet, transmitter will ignore any command.
Keeping on the MAGNET for at least 30 seconds and not more than 40 seconds, a “>OFF”
message will shown on display removing magnet in this period will turn off the power to the
transducer for sensor replacement and the transmitter will de‐energize the transducer,
transmitter will confirm that transducer is safe to open by showing “SAFE” message.
Keeping on the MAGNET between 40 seconds and 50 seconds, a relative time counter is
shown in this period, if removing magnet, transmitter will ignore any command.
Keeping on the MAGNET for at least 50 seconds and not more than 60 seconds, a “>RES”
message will shown on display, by removing magnet in this period, the transmitter will wait
for operator confirmation by showing “GO1?” message, if in 10 seconds operator confirm
the operation by putting magnet on SET point, the transmitter will reset calibration
parameters and de‐energize the transducer otherwise cancel commands and return to
normal operation.
Keeping on the MAGNET between 60 seconds and 70 seconds, a relative time counter is
shown in this period, if removing magnet, transmitter will ignore any command.
Keeping on the MAGNET for at least 70 seconds and not more than 80 seconds, a “>DEF”
message will shown on display, by removing magnet in this period, the transmitter will wait
for operator confirmation by showing “GO2?” message, if in 10 seconds operator confirm
the operation by putting magnet on SET point, the transmitter will reset all parameters to
FACTORY DEFAULT and will restart, otherwise cancel commands and return to normal
operation.
If keeping the magnet more than 80 seconds, transmitter will lock the command and will
ignore the presence of magnet showing “>END”, to repeat the MENU, should remove the
magnet and repeat it again.
P a g e | 36 of 51 5.2.4. Digit‐Sequence3‐Calibration
As factory default, reference gas for calibration is set to 50% of full scale of detection gas type; it is possible to change reference gas concentration with MT500 Configuration Tools using RS485 MODBUS “Non HART Version” or by HART communicator “HART Version”. For calibrating the GAS Sensor, two points needed to settle, Zero and Span. During calibration phase, can cancel the procedure by giving the MAGNET command. The accuracy of the Smart Transmitter depends upon routine re‐calibration which should be carried out at least every 90 days. This procedure is extremely simple and may be carried out by one person aided by prompts from the digital display. Calibration may be completed in less than 5 minutes. All calibration parameters are tested by advanced software routines before being accepted. Any errors detected will be shown on the digital display by means of an appropriate fault code. D3.1 Before start, if you suspect that gases are present in sensor location, sensor should be purge by clean air “flow rate between 0.5lpm to 1lpm”. Ensure that the instrument has stabilized for at least 1 hour. Starting the calibration, transmitter will start in Zero calibration by showing “ZERO”,
during this stage; operator should assure that there is no gas in the sensor area, by finishing zero, this message will goes and transmitter enter to next calibration step. D3.2 After Zero, transmitter will start to do the Span, and wait to the operator to apply reference gas “flow rate between 0.5lpm to 1lpm”. During this period, “>GAS” message will shown
on display; the operator has 3 minutes to apply the gas, if this not happens and sensor does not detect the gas, the sensor goes to calibration error and recover last good calibration parameters. As soon as sensor signal reaches to acceptable range defined for each type of gas, the transmitter will start to do span calculation by showing “SPAN”.
It is important to keep the reference gas flow stable during this phase and when transmitter succeed to calculate Span factor, span message will disappear and transmitter will goes to next calibration step. D3.3 After Span calculation, before start to reading gas, transmitter will wait that the signal return to below WARNING level, in this period “>AIR” message will appear.
Again, during this stage, operator should assure that there is no gas in the sensor area.If this happens, the transmitter will maintain calculated parameters and return to its normal operation, in contrary if this does not happens within 3 minutes from AIR message, the sensor will goes to calibration error and will recover last good calibration parameters. D3.4 If any step of calibration goes wrong and transmitter could not finish calibration correctly, Transmitter will recover last good calibration parameters and start to indicate to the operator by alternating messages “CAL.” and “ERR.” for 5 seconds then keeping it
steady. After next good calibration, this message will clear. Calibration can goes wrong if operator do not follow the mentioned steps or if the sensor could not supply a good signal. END of calibration. 5.2.5. Digit‐Sequence4‐Fault
In case of any FAULT, transmitter will goes to SAFE sate disconnecting analogue line and will open FAULT contact. P a g e | 37 of 51 D4.1 If any problem is detected during operation, which cause sensor not reliable or functioning, the “FLTx” message will shown and remains steady, the same time output current will
goes to 0mAmp and FAULT contact will open. Maintenance should change the sensor As Soon As Possible in order to guarantee safety of the plant. X is fault recognition code. D4.2 If transmitter could not communicate with transducer, the “FLT1” message shown and
transmitter will de‐energize the transducer to avoid any damage. Output current remain at 0mA and FAULT relay will open. All connections from transmitter to transducer should verified if problem persist, contact manufacturer for assistance. D4.3 If transmitter found any problem in sensing element, the “FLT2” message shown and
transmitter will de‐energize the transducer to avoid any damage. Output current remain at 0mA and FAULT relay will open. Try to replace sensing element and in case problem persist, contact manufacturer for assistance. P a g e | 38 of 51 Simplified operation cycle: Digit 0 0 C O O D1.1…D1.4
L1.1…4
2 2 C O O D1.5 L1.5
4 * * 4 * * C C C O O C O O O D2.1 L2.1
D2.1 L2.1
D2.1 L2.1
* * C C C D2.2 L2.2
2 2 ** 2 2 ** C C ** O O ** O O ** D3.1/D3.3
L3.1/L3.3
D3.2 L3.2
D2.4 D3.4 L2.4
L3.4 0 0 O O O D2.3 L2.3
D4.1…D4.3 L4.1…L4.3 LED Alarm 2.4 3 Warning 2 2.1 2.2 2.3 Fault 1.2 Power Up Recognizing all connected components and setting up parameters and do all diagnostics. Apply the Wait Time according to connected sensing element; each sensor does need a proper wait time in order to give a stable signal. Display Indication “SECTION X” CH2 1 1.1 Output Signals Analogue Digital mA CH1 Sequence Action Normal Operation Clean Ambient “no GAS” Presence of GAS below Warning Level Presence of GAS, reached Warning Level but before Alarm Level Presence of GAS, Above Alarm Level Calibration 3.1 3.2 3.3 Wait for Clean Air Wait for Span In case of error during calibration, sensor will used last good calibration/default parameters and continue the operation indicating a proper message on display, gas reading will have error in concentration and maintenance should solve the problem as soon as possible. 4 4.1 Fault Any fault that makes sensor not functioning * Follows gas concentration
** Same as normal operation but with error in reading C = Closed O = Open P a g e | 39 of 51 6. Maintenance
Failure to follow all safety precautions and instructions may result in property damage, serious injury, or death to you or others. 





Read and understand all instructions before performing maintenance on this unit.
Do not perform electrical maintenance on this unit when circuits are energize.
Periodic checks should made to ensure that effectiveness of the device is not reduced and
ensure that the detector can detect hazard gas.
Any maintenance to this unit MUST be performed by a trained electrician in accordance with
guidelines and local codes.
Never alter this unit in any manner. Safety in hazardous locations may be jeopardized if
additional openings or alterations are made to this device.
The nameplates, which contain cautionary or other important information to maintenance
personnel, should not be obscured if exterior of device is painted.
Do not disconnect while circuit is live or unless the area is known to be free of ignitable concentration of gases. Effectiveness of explosion‐proof enclosure must be maintained. Use caution to avoid damaging machined surfaces. Unauthorized repair/servicing of the unit may result in degradation of performance and/or property damage, serious injury, or death to you or others. If a malfunctioning unit is encountered, do not attempt any field repair/retrofit of parts. IMX S.r.l. will service your equipment or provide technical assistance with any problems that cannot be handled locally. Any units returned to IMX S.r.l. for service, inspection, or repair must be accompanied by a Return Material Authorization. At this time a brief explanation of the service requested or the nature of the malfunction should be given. P a g e | 40 of 51 6.1. RoutineMaintenance
Once correctly installed, systems require very little maintenance other than Routine Re‐calibration and periodic inspection. Sensors exposed to the elements may require a little grease on the accessory mounting threads. The grease must be free from silicones (Refer to Sensor Poisons) and have a high melting point. Alternatively P.T.F.E. tape may be used. The removal of particulate matter from sensor accessories may be facilitated by the use of an appropriate halogen‐free solvent. The accessories should be thoroughly dried, with compressed air if necessary, before refitting to the sensor body. We strongly recommends that the complete system, including all alarm circuitry be tested at least annually and that the following checks be carried out: 




All Smart Transmitter assemblies for suitability of mounting positions so that modifications to
plant layout have not affected these.
Security of mounting
Sensor filter cap for clogging due to water, oil, dust, paint or other contaminants
Sensor accessories where fitted
Condition of fastening of cables.
6.2. SensingElementReplacement
The innovative features of intelligent SMART MT500 detector enable the user to carry out a current interruption to the transducer by simply taking the magnet on the panel see DISPLAY MENU COMMANDS for LED or Digit Display. Transducer protection cap should not remove before de‐energizing transducer following the instruction and verification by display. 




Only when you have display confirmation that the transducer is de‐energized, loosen the Safety
Blocking Screw placed on the transducer filter cap with the Allen screwdriver provided by supplier.
Unscrew anticlockwise the Sintered Filter Cap, in order to make the sensor housing accessible.
Extract Sensing Element by hand.
Insert the new Sensing Element taking care about the position of the connection pins; this operation
is simplified by the writing “INSERT ↑” on transducer body, which must correspond with the same
writing on the sensing element.
Screw the Sintered Filter Cap.
P a g e | 41 of 51 


Block it with the Safety Blocking Screw.
Touching the panel with the magnet (near the writing “MAGNET”, or “MENU”), sensor power supply
will be re‐established and sensor will restart.
At the end of sensor stabilization, carry out calibration of SMART S‐500 MT.
6.3. TransmitterFactoryDefaults
Parameter Reference Gas Level Warning Default Value 50% of Full Scale * HC = 25% L.E.L. TX = 20% of Full Scale Alarm HC = 50% L.E.L. TX = 40% of full Scale Analogue Output during Calibration 2mA Analogue Output during Startup 2mA MODBUS Address 1 * Some sensors are using different set point, please see sensor datasheet for more info.
6.4. ChangeTransmitterSettings
In case that requested parameters been specified during order, IMX will expedite sensors accordingly, anyhow it is possible to change factory default parameters by connecting the transmitter to a PC trough a RS485 converter (see MODBUS section). P a g e | 42 of 51 6.5. OrderCode
Transmitter order code: Type Display SS316 Gray All Gases One Channel LED 17.11.0411 Digit 17.11.0412 Two Channels LED 17.11.0421 Digit 17.11.0422 Note: HART version should be specified separately Housing Cooper Free Light Alloy Marin Grade painted RED Yellow Blue Explosive Toxic O2 17.11.0111 17.11.0211 17.11.0311 17.11.0112 17.11.0212 17.11.0312 17.11.0121 17.11.0221 17.11.0321 17.11.0122 17.11.0222 17.11.0322 Transducer order code “does not include Filter Cap – 17.00.0001”: Transducer Type Code Catalytic Bead CAT 17.02.9901 Infra‐Red IR 17.01.9903 Electrochemical ECC 17.04.9901 Nano‐MOS MOS 17.06.9901 Transducer order code: Detection GAS Combustible (HC+H2) Combustible (HC) Ammonia (NH3) Transducer CAT IR CAT ECC Ethene (Ethylene C2H4) ECC Formaldehyde (CH2O) Ethylene Oxide (C2H4O) ECC ECC Chlorine (Cl2) ECC Bromine (Br2) ECC Carbon Monoxide (CO) IR F.S. 0‐100% 0‐100% 0‐100% 0 ‐ 100 0 ‐ 1000 0 ‐ 10 0 ‐ 200 0 ‐ 1500 0 ‐ 10 0 ‐ 20 0 ‐ 20 0 ‐ 50 0 ‐ 200 0 ‐ 5000 0 ‐ 10 0 ‐ 50 0 ‐ 200 0‐5% 0‐100% Unit L.E.L. L.E.L. L.E.L. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. vol. vol. Sensor Code 17.02.0103 17.01.0004 17.02.0104 17.04.0610 17.04.0611 17.04.0801 17.04.0802 17.04.0803 17.04.0901 17.04.1001 17.04.0700 17.04.0701 17.04.0702 17.04.0703 17.04.0710 17.04.0711 17.04.0712 17.01.0101 17.01.0102 P a g e | 43 of 51 Detection GAS Transducer Carbon Monoxide (CO) ECC Hydrogen (H2) Hydrogen Peroxide (H2O2) ECC ECC Hydrogen Sulfide (H2S) ECC Hydrogen Chloride (HCl) ECC Hydrogen Bromide (HBr) ECC Hydrogen Cyanide (HCN) (NO) ECC ECC (NO2) Phosphine (PH3) ECC ECC Silane (SiH4) ECC Sulfur Dioxide (SO2) ECC F.S. 0 ‐ 20 0 ‐ 100 0 ‐ 200 0 ‐ 1000 0 ‐ 1000 0 ‐ 100 0 ‐ 500 0 ‐ 50 0 ‐ 100 0 ‐ 200 0 ‐ 20 0 ‐ 200 0 ‐ 1000 0 ‐ 10 0 ‐ 100 0 ‐ 500 0 ‐ 100 0 ‐ 25 0 ‐ 100 0 ‐ 20 0 ‐ 5 0 ‐ 500 0 ‐ 1000 0 ‐ 20 0 ‐ 50 0 ‐ 20 0 ‐ 100 Unit p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. p.p.m. Sensor Code 17.04.0004 17.04.0003 17.04.0006 17.04.0007 17.04.1101 17.04.1201 17.04.1202 17.04.0105 17.04.0111 17.04.0112 17.04.1301 17.04.1302 17.04.1303 17.04.1310 17.04.1311 17.04.1312 17.04.0510 17.04.0310 17.04.0311 17.04.0410 17.04.1401 17.04.1402 17.04.1403 17.04.1501 17.04.1502 17.04.0203 17.04.0205 Special Tools: Tool Code Calibration Magnet 18.04.9999 Splash Guard 18.04.0000 Pole Mounting Bracket 18.04.0007 Wall Mounting Kit 18.04.0008 Sun Shade 55.00.9999 * Calibration Kit (900 ml/min) For Cl2, ClO2, HCl, NH3, NO2 (SS316)
18.04.0009 * Calibration Kit (500 ml/min) For H2S, SO2 (SS316)
18.04.0010 * Calibration Kit (500 ml/min) For CO, HC, H2, NO
18.04.0011 Filter Cap 17.00.0001 * Complete with carrying case, regulator, 3 meters flexible pipe and splashguard,
reference gases should be ordered separately. P a g e | 44 of 51 Calibration Reference Gas: 1.6Liters Cylinder filled with ~60 litter pressurized gas @ ~35 Bar Ref. Gas Concentration Type Code Methane (CH4) 50 % L.E.L. Cylinder 18.01.0003 Butane (C4H10) 50 % L.E.L. Cylinder 18.01.0028 Propane (C3H8) 50 % L.E.L. Cylinder 18.01.0023 Hydrogen (H2) 50 % L.E.L. Cylinder 18.01.0011 Ammonia (NH3) 50 ppm Cylinder 18.01.0034 100 ppm Cylinder 18.01.0013 500 ppm Cylinder 18.01.0035 Carbon Monoxide (CO) 10 ppm Cylinder 18.01.0036 50 ppm Cylinder 18.01.0027 100 ppm Cylinder 18.01.0037 Chlorine (Cl2) 10 ppm Cylinder 18.01.0031 50 ppm Cylinder 18.01.0038 Hydrogen Chloride (HCl) 10 ppm Cylinder 18.01.0039 100 ppm Cylinder 18.01.0040 Hydrogen Sulfide (H2S) 25 ppm Cylinder 18.01.0012 50 ppm Cylinder 18.01.0014 Nitric Oxide (NO) 10 ppm Cylinder 18.01.0041 100 ppm Cylinder 18.01.0042 Nitrogen Dioxide (NO2) 10 ppm Cylinder 18.01.0043 Oxygen (O2) 20.9% Cylinder 18.01.0044 Sulfur Dioxide (SO2) 10 ppm Cylinder 18.01.0030 25 ppm Cylinder 18.01.0045 Purge Air Air Cylinder 18.01.0029 6.6. Storage
Transmitter and transducer should be stored in a clean dry area and within the temperature range quoted. When prolonged storage is anticipated, modules should be sealed, together with a desiccant, into plastic bags and double wrapped for protection. Special care should take for storage of all sensing elements; they should be stored in a clean dry area and within the temperature range quoted as follow: TYPE Storage Life Storage Relative Pressure Range In Container Temperature
Humidity (From / To) (From / To) Transmitter 5 Years ‐40 °C / 80 °C 0 % / 100 % Atmospheric ± 10% Catalytic Bead 5 Years ‐40 °C / 70 °C 0 % / 100 % Atmospheric ± 10% Electrochemical 6 Months 5 °C / 20 °C 15 % / 90 % Atmospheric ± 10% InfraRed 5 Years ‐40 °C / 70 °C 0 % / 95 % Atmospheric ± 10% Nano MOS 5 Years ‐50 °C / 70 °C 0 % / 95 % Atmospheric ± 10% P a g e | 45 of 51 7. MODBUS
The Modbus communications interface is based on the RS485 standard. It is implemented as a 2 wire, half‐duplex, balanced differential interface which conforms to the EIA‐485 specification. Each slave device must have its unique address so that more than one device can be connected to an independently addressed on the same RS485‐link. The Modbus interface factory defaults are set to Node Address 1 for first channel and address 2 in case of presence of second channel, 9600 baud, no parity and 1 stop bit, response time out is 1000ms. When the instrument is powered up, the Modbus setup defaults to the settings used before it was powered down. 7.1. MODBUSConnection
P a g e | 46 of 51 7.2. MODBUSExceptionCodes
Code Name Illegal function Function Illegal data address Illegal data value Slave device busy Description code is not recognised by the slave Data address specified is not supported by the slave Data value specified is not supported by the slave The slave is engaged in completing a long duration programme command Hex value 01 02 03 06 7.3. MODBUSRead/WriteCommands
Function Code 03 06 Description Read holding registers Preset Single Register Access Type Read Write Any of commands with Function Code 3 allow data to be read from the instrument. The message structure for each read command specifies a start register address. A maximum of 28 consecutive registers can be accessed for RAM area and maximum 1 register can be read from ROM area. Each register configures the data as 2 bytes with the most significant byte first. If more than permitted quantities try to be read or if there is an attempt to access any register outside the valid read register address space, the Illegal Data Address response is returned. Any of the commands with Function Code 6 allow write data to be written to the instrument. The message structure for each write command specifies a register address to which data is written. If more than 1 register is addressed or if there is an attempt to access any register outside the valid write register address space, the Illegal Data Address response is returned. The issue of a write command to a single valid write register normally causes all of the data specified to be overwritten. In certain situations, it is impossible to force a condition due to the presence of an external event e.g. attempts to clear a fault while the fault condition is still present results in the fault not being cleared. For other situations, any attempts to assign unused, read‐only or out of range values will have no effect. It is advisable to issue a read of the same register range to verify the true data value present subsequent to the write cycle. 7.4. RegisterMapping
Register Function Dec. 00 MODBUS Address 01 Sensor Type 02 Reading gas Value Access Type Read/Write Read Read P a g e | 47 of 51 Register Dec. 03 04 05 06‐07 08‐11 12 13‐14 15 16 17 18 19 20 21 22‐23 24 25 26 27 100‐103 116 117‐120 121‐123 124‐125 126‐127 128‐129 130 180 181 182 183 184 188 189 190 191 192 193 196 197 Function Full Scale Range Alarm Level Warning Level Factory reserved Device TAG Transducer Type Factory reserved Reference Gas concentration Factory reserved Firmware Version Analogue Output correction factor Status Register 1 Status Register 2 Sensor Temperature Output Current Factory reserved Analogue Output Calibration Mode Setting Analogue Output Calibration Mode Setting Factory reserved Full Firmware Revision “RUN TIME” Manufacturer ID Transmitter Serial Number Factory reserved Transmitter working life time Sensor working life time Working time after last calibration Sensor Replacement Counter Turn On Counter Alarm Counter Warning Counter Calibration Counter Fault Counter Total In Alarm time Last Alarm duration time Time elapsed from last Alarm Total In Warning time Last Warning duration time Time elapsed from last Warning Total In Fault time Last Fault duration time Access Type Read Read/Write Read/Write Read Read/Write Read/Write Read Read/Write Read Read Read/Write Read Read Read Read Read Read/Write Read/Write Read/Write Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read P a g e | 48 of 51 Register Dec. 198 199 200 201 Function Time elapsed from last Fault Total In Calibration Error time Last Calibration Error duration time Time elapsed from last Calibration Error Access Type Read Read Read Read 8. HART
On specific request, HART enabled version of transmitter is also available, for HART operation see relative instruction manual. 9. SafetyFunctionRequirements“IEC61508”
This section contains safety related information to comply with IEC 61508 for SIL 2 level, this product should be handled carefully and installed, calibrated, and maintained in accordance with the instruction manual. Remember, these products are for your safety. Safety function: Measure the gas concentration and convert actual value into 4‐20mA output signal. The total tolerance for the safety function is the sensor accuracy of ±5% This product is regarded as Type B field devices per IEC 61508. The safety function of the detector does not include:  HART communication
 RS‐485 Modbus communication
 Display
HART / Modbus communication and Display are used for field device setup, diagnostics, and troubleshooting observe requirements for interfacing in hazardous locations. These are non‐interfering functions and do not interrupt the safety critical function of the detectors. 9.1. ConditionsforSafeOperating
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Follow this manual for positioning/installation and connection of the detector.
The detector shall consist only of the approved hardware and software modules.
The 24V power supply must fulfill the requirements of EN 60950 within the range of this manual.
The set‐up parameters must be verified and the function of the Detector must be checked
completely.
The complete function of the detector must be examined at least every six or twelve months, this
can be done with calibration “see section 5 and 6 of this manual”, special care should be taken for
selecting the correct type of reference gas according to sensor and application.
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The filter of the sensor must be examined at appropriate time intervals according to site condition.
The output current must be supervised regarding the over‐and under run of the 4‐20mA.
9.2. FailureRateData
The tables below list the SIL parameters for MT500 devices. Function Code Product Life (Years) IR 20 Years * λDD (Fails per hour) 32.71E‐7
λDU (Fails per hour) 1.31E‐7 Safe Failure Fraction (SFF) 96.8%
Safety Integrity Level (SIL) 2 Diagnostic Test Interval Accuracy @ 25ºC CAT 20 Years ** MOS 20 Years * EC 20 Years *** N.A. N.A. N.A. 5 sec 5 sec 5 sec 5 sec (critical faults) (critical faults) (critical faults) (critical faults) ±5% ±3% ±10% ±10% up to 50% F.S ±5% ≥ 50% F.S Response Time **** Average Probability of Failure on Demand (PFDavg) MTTR=8h T50 ≤ 8 Sec T90 ≤ 10 Sec 5.74E‐4 T50 ≤ 10 Sec T90 ≤ 15 Sec T50 ≤ 14 Sec T90 ≤ 30 Sec *
More than 5 Years for sensing element.
** 3 to 5 Years for sensing element.
*** 2 to 3 Years for sensing element. **** 100% of F.S. applied. Note: real sensing element life time is depend to installed environment. T50 ≤ 10 Sec T90 ≤ 25 Sec