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Atest Gaz Sigma SmArt User Manual

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User's Manual
Gas Detector
Sigma
SmArt / SmArtGas 3
Product code:
PW-044-X
POD-009-ENG R07

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Summary of Contents for Atest Gaz Sigma SmArt

  • Page 1 User's Manual Gas Detector Sigma SmArt / SmArtGas 3 Product code: PW-044-X POD-009-ENG R07...
  • Page 2 We design, manufacture, implement and support: Systems for Monitoring, Detection and Reduction of gas hazards We invite you to familiarize yourself with our offer on www.atestgaz.pl Atest Gaz A. M. Pachole sp. j. ul. Spokojna 3, 44-109 Gliwice Poland tel.: +48 32 238 87 94 fax: +48 32 234 92 71 e-mail: contact@atestgaz.pl...
  • Page 3 www.atestgaz.pl Comments and objections Connection and operation of the detector is allowed only upon having read and understood the contents of this document. Keep User's Manual with the device for future use. The manufacturer shall not be liable for any errors, damage and malfunctions caused by improper selection of equipment, faulty installation, or the lack of understanding of this document.

  • Page 4: Table 1: Optical Indicators Status Notation

    www.atestgaz.pl Painting of the detector, in particular the sinter, is unacceptable. In the case of the expected presence of aggressive gases, make sure that the equipment and materials utilized in the construction are suitable for the intended use. Particular attention should be paid to corrosive gases such as HCl, NH S and SO Service operations –...

  • Page 5: Table Of Contents

    www.atestgaz.pl Table of contents 1 Preliminary information...........................7 1.1 Intended use and principle of operation....................7 1.2 Functional properties..........................7 1.3 Gas detector status..........................8 1.4 Detected gases............................8 1.5 Output signal............................9 2 Safety..............................10 2.1 Marking of explosion protection......................10 2.2 Areas of safe use due to explosion proof performance................11 2.3 Electromagnetic compatibility......................11 2.4 IP class..............................11 2.5 Other conditions of the working environment..................11...
  • Page 6 www.atestgaz.pl List of Figures Figure 1: Device dimension........................13 Figure 2: Construction of the device......................14 Figure 3: Connection diagram (RS-485)......................14 Figure 4: Example of the connection diagram with RS-485 output.............15 Figure 5: Connection diagram (420)......................15 Figure 6: Example of the connection diagram with 420 output..............16 Figure 7: Connection diagram (RS-485 + 420)....................16 Figure 8: Example of the connection diagram with RS-485 + 420 output...........17 Figure 9: Connection diagram (420 + PK)....................17...

  • Page 7: Preliminary Information

    (only for RS-485). Output signal: • SmArtGas 3: RS-485, 4 – 20mA, relay outputs. • Sigma SmArt: RS-485. Parametrization and calibration without the use of mechanical parts. Electronic compensation of the influence of ambient temperature.

  • Page 8: Gas Detector Status

    www.atestgaz.pl Gas detector status Mode Description Correct The detector operates properly and makes measurements. The concentration value of the gas operation being measured does not exceed threshold values and no irregularities in the device operation were detected. Warning 1 Signalled after exceeding the gas concentration above the specific value. Warning 2 Signalled after exceeding the gas concentration above the specific value.

  • Page 9: Output Signal

    • Communication through RS-485 interface is implemented according to MODBUS ASCII (SmArtGas 3) and SigmaBus (Sigma SmArt). Applications of other protocols are also possible. • For gas detectors with RS485 output, the output signal is digitized. In general, the gas detector status is described by the following variables: ∘...

  • Page 10: Safety

    www.atestgaz.pl Safety All activities related to connecting detectors, signallers and other system components must be carried out while Control Unit's power supply is of. Although switching power supply of the Gas Detection System of, there is a possibility that a dangerous voltage can exist on the terminals of the Control Unit. It can originate from another system like for an example ventilation system that uses one of the output pins of Control Unit.

  • Page 11: Areas Of Safe Use Due To Explosion Proof Performance

    www.atestgaz.pl Areas of safe use due to explosion proof performance The resulting feature explosion proof performance: III 2G Ex d IIC T6-T5 Gb allows for operation in zones 2 and 1 being explosive atmospheres caused by gases, vapors or mists, on the surface, while maintaining the following conditions, II 2D Ex tb IIIC allows for operation in zone 21 and 22 being explosive atmospheres caused by dust on the surface of the earth.
  • Page 12 www.atestgaz.pl in the case of reactive substances – such as HCl, Cl – note the danger of adsorption of a particular substance on the sensor surface, particularly in humid environments, the probability of deposition of dust, grease and other "clogging" substances, especially on the sinter of the gas inlet to the measuring chamber, which may lead to the inhibit of the detector, probability of occurrence of hot vapours of liquid substances at ambient temperature –...

  • Page 13: Description Of The Construction

    www.atestgaz.pl Description of the construction Without display With display With acoustic signalling Figure 1: Device dimension p. 13|34 User's Manual: POD-009-ENG R07...

  • Page 14: Input-Output Interfaces

    www.atestgaz.pl Cable gland Ground terminal Display area Protection screws Measuring head Figure 2: Construction of the device Input-output interfaces Output RS-485 (SmartGas 3 and SmArt) 4.1.1 Connection diagram RS-485 Name Terminal Description Supply Power supply port. Parameters – see section 7 GND RS+ RS- Negative supply pole Positive supply pole...

  • Page 15: Ma (420) Output - Only Smartgas 3

    4.1.2 Example of the connection diagram with RS-485 output Control Unit T-connector Sigma SmArt Sigma SmArt Figure 4: Example of the connection diagram with RS-485 output 4 – 20 mA (420) output – only SmArtGas 3 4.2.1 Connection diagram 420...

  • Page 16: Rs-485 + 420 Output - Only Smartgas 3

    www.atestgaz.pl 4.2.2 Example of the connection diagram with 420 output Control Unit SmArtGas 3 Figure 6: Example of the connection diagram with 420 output Value of R shown in table 7. RS-485 + 420 output – only SmArtGas 3 4.3.1 Connection diagram RS-485 + 420 No.

  • Page 17: 420 + Relay Output - Only Smartgas 3

    www.atestgaz.pl 4.3.2 Example of the connection diagram with RS-485 + 420 output Control Unit Robc RS+ RS- SmArtGas 3 Figure 8: Example of the connection diagram with RS-485 + 420 output Value of R shown in table 7. 420 + relay output – only SmArtGas 3 4.4.1 Connection diagram 420 + PK Name...

  • Page 18: User's Interface

    www.atestgaz.pl 4.4.2 Example of the connection diagram with 420 + PK output Control Unit DI 3 DI 2 ZAS II DI 1 NO COM NO COM NO COM SmArtGas 3 Figure 10: Example of the connection diagram with 420 + PK output User's interface Detailed description of the user interface are given in appendix [16].
  • Page 19 www.atestgaz.pl the influence of the gas temperature – a substance heavier than air when heated becomes lighter and migrates upwards, but after cooling, it can flow down toward the floor, pressure and the expected nature of outflow (leakage / gush), volatility of gas –...
  • Page 20 www.atestgaz.pl 6.2.2.2 Mechanical installation of the detectors The detector must be mounted with the detection element down, using the two mounting holes, with the use of two expansion plugs or M5 screws. The detectors are optionally provided with a mounting base, allowing to mount a detector at a certain distance from the wall (e.g.

  • Page 21: Figure 11: Grounding Connection And Correct Cable Laying

    www.atestgaz.pl Ground connection should be protected from corrosion (e. g. a small amount of technical petroleum jelly). Figure 11: Grounding connection and correct cable laying The cable shield shall be isolated and slightly protrude from the cable entry inside the detector. The shield cannot be connected to any device point.

  • Page 22: Start-Up Of The Installation

    www.atestgaz.pl Incorrect cable routing can lead to reducing the device's immunity from electromagnetic interference. Start-up of the installation 6.3.1 Overview of explosion safety Only after a positive assessment of the method of connection and restoring flameproof properties of the detector, it is permissible to connect the detector to power and the transmission line. 6.3.2 Handover inspection The handover inspection should provide for the examination of the detectors and checking the whole alarm...
  • Page 23 www.atestgaz.pl 6.4.1 Activities connected with the operation Activities connected with the operation of detectors can be divided as follows: verification – feeding the gas at a control concentration in order to validate the detectors response, resetting – during operation, the detector may indicate minor gas concentration despite the fact that in reality there is no gas in the building.
  • Page 24 www.atestgaz.pl Checking is done by giving the test gas at a concentration of about 20% higher than the value of the alarm threshold – or at 50 – 100% of the measurement range and monitoring the behaviour of the detector. The gas is provided from the respective cylinder / bag using a calibration cap screwed onto the measuring head.
  • Page 25 www.atestgaz.pl • at other time interval determined on the basis of the survey inspection and changes in sensitivity during the operation in the plant. Detectors calibration should be carried out in a laboratory under the fume hood (manufacturer's recommendation). When for certain reasons disassembly is not possible, it is permissible to conduct the calibration "in situ", i.

  • Page 26: Figure 12: Operation Chart Of Gasometric Detectors

    www.atestgaz.pl FUNCTIONALITY EXPLOSION PROOF INSTALLATION EXECUTION Visual Check Inspection Calibration Maintenance INFORMATION ON THE DATE OF THE SURVEY INSPECTION Check Calibration Visual Check Inspection Maintenance Calibration Information on Information on the frequency of the frequency visual inspections of checks Visual Check Inspection Maintenance...
  • Page 27 www.atestgaz.pl 6.4.3.2 Calibration procedure The procedure for calibration / adjustment is based on: switching the selected detectors to calibration mode – the calibration mode is recognized by the control unit – it allows it to avoid unnecessary alarming of the environment as the detector responds to the test gas, activation of the registration mode in the program, subsequent provision of the gas sequence (high concentration / air / high concentration) to the...
  • Page 28 www.atestgaz.pl 6.4.7 Periodic inspections Periodic inspections shall include the following: assessment of the overall condition, taking into account explosion safety, checking of the detectors – checking of the detectors is carried out without their disassembly, by feeding a gas at a control concentration in order to validate the detector's response, checking the alarm track for the selected alarm detectors.
  • Page 29 www.atestgaz.pl 6.4.12.2 Assembly and disassembly of the sensor in the measuring head It is recommended that all manipulations with the measuring head were performed by the manufacturer's service or trained personnel. Replacing the sensor must always be connected with the calibration of the detector. Any manipulation must be performed with the detector power of.

  • Page 30: Utilization

    www.atestgaz.pl 6.4.13.3 Cleaning the device The only manner of cleaning the device is to wipe it with a damp soft cloth. Agents containing solvents, petrol or alcohols cannot be used to clean the detector. Utilization This symbol on a product or on its packaging indicates that the product must not be disposed of with other household waste.

  • Page 31: Technical Specification

    www.atestgaz.pl Technical specification Power supply • V 12 – 30 V • Power consumption 0,48 – 3,6 W Environment • Ambient temperatures -40 – +60°C (option T = 0) -40 – +85°C (option T = T) • Humidity 10 – 90% long term 0 –...

  • Page 32: List Of Consumables

    FLED.A Table 8: Current consumption List of consumables Consumables Life time Manufacturer Product code Sensor with gasket Dependent on sensor type Flameproof housing Dependent on environment Atest Gaz PWS-002-B Table 9: List of consumables p. 32|34 User's Manual: POD-009-ENG R07...

  • Page 33: List Of Accessories

    More information regarding the configuration of the devices in order to determine the code of the product can be found in appendix [2] (SmArtGas 3) and [3] (Sigma SmArt). Mounting adapter can not be used for the version D = FLED.A.

  • Page 34: Appendices

    Appendices [1] DEZG019-ENG – EU Declaration of Conformity – Sigma SmArt, SmArtGas 3 [2] PU-Z-052-ENG – Marking the hardware configuration SmArtGas 3 [3] PU-Z-055-ENG – Marking the hardware configuration Sigma SmArt [4] PU-Z-030-ENG – Parameters of gas detectors with semiconductor sensors DET [5] PU-Z-054-ENG –...
  • Page 35 www.atestgaz.pl EU Declaration of Conformity Atest-Gaz A. M. Pachole sp. j. declares with full responsibility, that the product: (Product description) (Trade name) (Type identifier or Product code) Gas Detector Sigma SmArt, PW-044 SmArtGas 3 complies with the following Directives and Standards: in relation to Directive 2014/34/EU –...
  • Page 36 www.atestgaz.pl SmArtGas 3 hardware configuration marking Code Sensor Cable gland Trade Device name Type W (Note 1) 3,2 – 8 mm Gas detector SmArtGas 3 PW-044 S-X-X.X 6,5 – 11,9 mm FLED 10 – 14 mm FLED.A Note 1: For E = ALB, ALZ, C – material brass nickel plated, for E = SS – material stainless steel. Cable gland mounted on the right.
  • Page 37 www.atestgaz.pl T – temperature range Limited use standard • -20 – 40°C increase temperature range for gas detector • -40 – 85°C (Note 3) Note 3: The maximum temperature range of the gas detector is limited by sensor, temperature class or display. O –...
  • Page 38 Sigma SmArt hardware configuration marking Code Sensor Cable gland Device Trade name Type W (Note 1) 3,2 – 8 mm Gas Detector Sigma SmArt PW-044 S-X-X.X 6,5 – 11,9 mm FLED 10 – 14 mm FLED.A Note 1: For E = ALB, ALZ, C – material brass nickel plated, for E = SS – material stainless steel. Cable gland mounted on the right.
  • Page 39 – 6,5 – 11,9 mm 6,5 – 11,9 mm Gas Detector Czujnik Gazu Wpust kablowy mosiądz niklowany, Cable gland brass nickel plated, Sigma SmArt Sigma SmArt 6,5 – 11,9 mm 6,5 – 11,9 mm Katalityczny Sensor katalityczny Catalytic sensor Catalytic converter module moduł...

  • Page 40: Table Of Contents

    www.atestgaz.pl Parameters of gas detectors with semiconductor sensors DET Table of contents 1 Detected substances..........................2 2 Principle of operation..........................2 3 Impact of environmental conditions......................3 3.1 Composition of the controlled atmosphere..................3 3.1.1 Impact of the presence of a substance in a controlled atmosphere..........3 3.1.2 Effect of oxygen concentration value....................3 3.2 Influence of temperature........................4 3.3 Influence of pressure..........................4...

  • Page 41: Detected Substances

    www.atestgaz.pl Detected substances Semiconductor sensors are used for measuring and detecting presence of flammable and toxic gases. Principle of operation The principle of operation of the semiconductor sensor is to change the resistance of the semiconductor in the presence of the detected gas. The interaction of the gas phase with the surface of the semiconductor leads to the formation of chemical bonds between the gas particles and the absorbent material (the chemisorption process).
  • Page 42 www.atestgaz.pl Impact of environmental conditions Never exceed the rated operating parameters of the detector. These parameters can be found in the detector calibration certificate. The detector must be used in accordance with the provisions in the User's Manual. Composition of the controlled atmosphere It is assumed that the standard composition of the atmosphere is a mixture of gases with the proportions indicated in table 1.
  • Page 43 www.atestgaz.pl Influence of temperature Temperature changes have a very significant influence on the sensor characteristics – these changes can lead to false alarms. Temperature impact models are very irregular, which makes good temperature compensation very difficult. Influence of pressure Within the environmental parameters of the sensor, the influence of pressure on the measurement is negligible.
  • Page 44 www.atestgaz.pl Parameters of gas detectors with catalytic sensors Table of contents 1 Detected substances..........................2 2 Principle of operation..........................2 3 Impact of environmental conditions......................3 3.1 Composition of the controlled atmosphere..................3 3.1.1 Impact of the presence of a working gas or other reaction gas............3 3.1.2 Effect of oxygen concentration value....................4 3.2 Influence of temperature........................4 3.3 Influence of pressure..........................4...

  • Page 45: Principle Of Operation

    www.atestgaz.pl Detected substances Detectors equipped with catalytic sensors are used for measuring and detecting the presence of gases and flammable gases in the range of up to 100% LEL. Principle of operation The catalytic sensor (figure 1) consists of two components: an active and a passive one, heated to a high temperature.

  • Page 46: Impact Of Environmental Conditions

    www.atestgaz.pl Impact of environmental conditions Never exceed the rated operating parameters of the detector. These parameters can be found in the detector calibration certificate. The detector must be used in accordance with the provisions in the User's Manual. Composition of the controlled atmosphere It is assumed that the standard composition of the atmosphere is a mixture of gases with the proportions indicated in table 1.

  • Page 47: Effect Of Oxygen Concentration Value

    www.atestgaz.pl concentrations over 100% LEL, even temporarily persistent ones, can lead to a physical wear of the sensor. For these reasons, detectors operating in places where such conditions may occur are / should be equipped with mechanisms to prevent the negative effects of high concentrations, a very high concentration of combustible gas (well above 100% LEL) leads to a decrease in oxygen concentration –...

  • Page 48: Influence Of Vibrations, Impacts

    www.atestgaz.pl Influence of vibrations, impacts Vibrations and impacts affect the detector's operation, as they may cause: damage to delicate parts of the sensor (e. g. detector element, compensation element), shift of the sensor's zero. It should be ensured that the detector is not exposed to shock and vibration in excess of the amplitude of vibrations amounting to 0.15 mm of the frequencies of over 10 Hz.
  • Page 49 www.atestgaz.pl Parameters of gas detectors with electrochemical sensor Table of Contents 1 Detected substances..........................2 2 Principle of operation..........................2 3 Impact of environmental conditions......................3 3.1 Composition of the controlled atmosphere..................3 3.1.1 Impact of the presence of a substance in a controlled atmosphere..........4 3.1.2 Impact of the presence of a working gas or other reaction gas............4 3.1.3 Effect of oxygen concentration value....................5 3.2 Influence of temperature........................5...

  • Page 50: Detected Substances

    www.atestgaz.pl Detected substances Detectors equipped with electrochemical sensors are used for measuring and detecting the presence of specific substances in gaseous atmospheres in concentrations generally above single "ppm," but in some cases (e.g. oxygen, hydrogen), the concentration may be tens or hundreds of thousands "ppm". These gases have characteristic measurement ranges.

  • Page 51: Impact Of Environmental Conditions

    www.atestgaz.pl 1 – inlet of sensor 2 – measuring electrode 3 – extra electrode 4 – electrolyte 5 – reference electrode 6 – membrane Figure 1: Construction of an electrochemical sensor Example response to a carbon monoxide sensor: Sensing electrode: CO + H O ->...

  • Page 52: Impact Of The Presence Of A Substance In A Controlled Atmosphere

    www.atestgaz.pl Ingredient C [% vol] C [ppm] Nitrogen 78.084 780 840 Oxygen 20.946 209 460 Argon 0.934 9 340 Carbon dioxide 0.0360 Neon 0.00181 18.18 Helium 0.00052 5.24 Methane 0.00017 1.70 Krypton 0.00011 1.14 Hydrogen 0.00005 0.50 Xenon 0.000008 0.087 Table 2: Typical composition of atmospheric air When gas concentrations in the atmosphere differ significantly from those indicated in the table 2, it is necessary to conduct the analysis of the impact of such a situation on the detector operation.

  • Page 53: Effect Of Oxygen Concentration Value

    www.atestgaz.pl with electrochemical sensors are designed to measure and detect the short-term presence of certain gases in the atmosphere. Both the more sustained concentration with values falling within the range of measurement, and even instantaneous concentrations outside the measuring range lead to a rapid wear of the sensor.
  • Page 54 www.atestgaz.pl Parameters of gas detectors with photoionization sensors PID Table of contents 1 Detected substances..........................2 2 Principle of operation..........................2 3 Impact of environmental conditions......................3 3.1.1 Impact of the presence of a working gas or other reaction gas............3 3.2 Influence of temperature........................3 3.3 Influence of moisture.........................3 3.4 Influence of pressure..........................3 3.5 Influence of vibrations, impacts......................3...
  • Page 55 www.atestgaz.pl Detected substances Detectors equipped with photoionization sensors are used for measuring and detecting the present gas substances, whose energy of ionization is lower then 10.6 eV. They are mostly volatile organic compounds (VOC). Examples of VOCs that can be detected by a PID sensor equipped with a 10.6 eV lamp: Aliphatic hydrocarbons –...
  • Page 56 www.atestgaz.pl Impact of environmental conditions Never exceed the rated operating parameters of the detector. These parameters can be found in the detector calibration certificate. The detector must be used in accordance with the provisions in the User's Manual. 3.1.1 Impact of the presence of a working gas or other reaction gas Some substances may polymerize on the lamp window under the influence of the radiation generated by the UV lamp.

  • Page 57: Factors Shortening The Lifetime Of The Sensor

    www.atestgaz.pl Factors shortening the lifetime of the sensor The lifetime of sensor is limited due lifetime of UV lamp. The following factors have an impact on the sensor's operation: substances that can deposit on the optical elements of the lamp, leading to lower sensitivity (periodic cleaning is therefore required), some substances can polymerize under the influence of UV radiation.
  • Page 58 www.atestgaz.pl Parameters of gas detectors with Hot-wire sensors Table of contents 1 Detected substances..........................2 2 Principle of operation..........................2 3 Impact of environmental conditions......................2 3.1 Composition of the controlled atmosphere..................3 3.1.1 Impact of the presence of a substance in a controlled atmosphere..........3 3.1.2 Effect of oxygen concentration value.....................3 3.2 Influence of temperature........................3 3.3 Influence of pressure..........................3...
  • Page 59 www.atestgaz.pl Detected substances Hot-wire sensors are used for measuring and detecting the presence of gases and vapor of combustible substances e. g.: hydrocarbons, vapours of alcohol, coal gas, hydrogen. Principle of operation The Hot-wire gas sensor measures the gas concentration by changing the platinum wire resistance by adsorbing gas on the surface of a metal oxide semiconductor.
  • Page 60 www.atestgaz.pl Composition of the controlled atmosphere It is assumed that the standard composition of the atmosphere is a mixture of gases with the proportions indicated in table 1. Ingredient C [% vol] C [ppm] Nitrogen 78.084 780 840 Oxygen 20.946 209 460 Argon 0.934...

  • Page 61: Factors Shortening The Lifetime Of The Sensor

    www.atestgaz.pl Influence of vibrations, impacts Strong vibrations and impacts may cause damage of the sensor. Factors shortening the lifetime of the sensor There are many factors that shorten the life of the Hot-wire sensor: silicone vapors absorb themselves on the surface of the sensor, gradually decreasing its sensitivity (avoid exposure of the sensor to silicone adhesives, silicone latexes, raising agents, oils, greases), high concentrations of corrosive gases (mainly NH S, SO...
  • Page 62 www.atestgaz.pl Parameters of gas detectors with IR sensors Table of contents 1 Detected substances..........................2 2 Principle of operation..........................2 3 Impact of environmental conditions......................2 3.1 Composition of the controlled atmosphere..................2 3.1.1 Impact of the presence of a working gas or other reaction gas............2 3.1.2 Effect of oxygen concentration value....................3 3.2 Influence of temperature........................3 3.3 Influence of pressure..........................3...
  • Page 63 www.atestgaz.pl Detected substances NDIR sensors (non-dispersive infra-red sensor), commonly called IR sensors, are used for measuring gases concentrations which have ability to absorb the electromagnetic spectrum in the infra-red range: organic compounds particularly methane, carbon dioxide, other (e. g. carbon monoxide, nitrogen compounds, ammonia, CFC, SF Those sensor do not detect hydrogen.
  • Page 64 www.atestgaz.pl The presence of extremely high concentrations of gases other than the working gas (accompanying gases) may prevent the measurement of the working gas concentration – due to the high absorption of the IR radiation by the accompanying gas (e. g. CO in the CH detector).
  • Page 65 www.atestgaz.pl Instructions for removing the lock of a detector with a catalytic sensor Detectors using a catalytic sensor (more details concerning the sensor – see Appendix PU-Z-054-ENG) are equipped with a system protecting against its damage caused by a gas concentration exceeding the measuring range of the sensor and before entering non-monotonic part of the catalytic sensor characteristics.
  • Page 66 www.atestgaz.pl Example of connection cables for gas detector PW-017 and PW-044 with 4-20 mA output Introduction It is recommended that all system components are made according to the design created by person with the necessary skills and competence. Connection cable In case where project does not specify this, you can use the following types of shielded cables for connecting gas detectors: An example of a cable symbol...
  • Page 67 www.atestgaz.pl Example of connection cables for gas detector PW-017 and PW-044 with relay output Introduction It is recommended that all system components are made according to the design created by person with the necessary skills and competence. Connection cable In case where project does not specify this, you can use the following types of shielded cables for connecting gas detectors: An example of a cable symbol Approximate external...
  • Page 68 www.atestgaz.pl Output current value of the Gas Detector in fault state Output current Emergency state Data memory error 0.25 mA 0.75 mA Program memory error 1.25 mA Gas Detector measurement system error 1.75 mA Gas Detector signal reference system error 2.25 mA Short circuit in the sensing element supply line 2.75 mA...
  • Page 69 www.atestgaz.pl Guidelines to the cabling of the system with an RS-485 interface Introductory It is recommended that all system components are made according to the design created by person with the necessary skills and competence. Connection cable The data transmission line for the gas detectors working in the RS-485 standard should be performed only with the use of a shielded twisted pair cable.
  • Page 70 www.atestgaz.pl Power supply of the gas detector As a standard, in gas detectors with digital data transmission, it is assumed that the voltage cannot drop below 12 V (see the documentation of the detector). The power consumption of the detector is constant within the range of acceptable voltages.
  • Page 71 For the systems with RS-485 interface, it is necessary to make sure that A and B transmission signals as well as + and – power supply were led with the use of the cables which belong to one pair. Atest Gaz A. M. Pachole sp. j. tel.: +48 32 238 87 94 p.
  • Page 72 It is unacceptable to leave a reserve inside the detector. Atest Gaz A. M. Pachole sp. j. tel.: +48 32 238 87 94 p.
  • Page 73 www.atestgaz.pl The user’s interface and failure codes of Gas Detectors of PW-017, PW-044 and PW-093 type Indicator marking symbols Symbol Description Optical indicator on Optical indicator flashing Optical indicator of Optical indicator status not determined (depends on other factors) Gas detector with FLED display (D=FLED) / FLED.A (D=FLED.A) In case of use of a detector with FLED four –...
  • Page 74 www.atestgaz.pl Detector’s state signalling – gas alarms Situation Description Indicators/display No danger The detector works properly, measures the concentration, which is indicated by continuously lit MONITORING ALARM indicator. 0,0 ppm _____ FAULT MONITORING Warning 1 The gas concentration exceeds the first warning threshold. Indicator 1 in the panel is continuously lit.
  • Page 75 www.atestgaz.pl Detector’s state signalling – special states Situation Description Indicators/display Heating Preparation of the detector to work. Its indications are ignored. ALARM The indicators are lit one after another in the clockwise direction. The display shows message Wygrzew (Heating). Wygrzew. FAULT Calibration The detector is in calibration state –...
  • Page 76 www.atestgaz.pl Signalling depending on the concentration of gas measured by the detector concentration Overload ALARM Warning 2 Warning 1 time ALARM Measur ement ALARM Measur ement The gas concentration is falling, and with it overload disappears warnings Description Sensor lock – sensor off, the last measurement latched Atest-Gaz...
  • Page 77 www.atestgaz.pl Failure codes Message Description AWK<failure code> Critical failure – the detector is damaged – does not perform measurements. The failure code is a hexadecimal number, the meaning of particular bits is as follows: bit 1 – incorrect values in the data block bit 4 –...
  • Page 78 www.atestgaz.pl Register map of SmArtGas 3 and ProGas Gas Detector All the data are available in the 'holding registers' (function code 3). Register Name Description Type 40001 State_A Detector status – the definition of bits below flags 40002 Inessential data, can take any value 40003 Gas concentration 16 bit integer...
  • Page 79 www.atestgaz.pl Classification of chemicals used at Atest-Gaz Because of the need to present a consistent and high level of maintenance services, to ensure the safety of the calibration process and to create a basis for a rational calculation of the costs of this process, Atest-Gaz developed the "Classification of Chemical Substances"...
  • Page 80 www.atestgaz.pl Category Description Terms of facility calibration No precipitations, no strong winds, Cylinder gases, temperature over – 10 C¹. stable environment In other cases, calibration at a location that meets the above conditions (necessary to remove the detectors). No precipitations, no strong winds, Cylinder gases, temperature over + 10...

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