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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

3.3 Influence of moisture.........................................................................................................................5
3.4 Influence of pressure..........................................................................................................................5

3.5 Influence of vibrations, impacts..........................................................................................................5

4 Factors shortening the lifetime of the sensor...........................................................................................5

Atest-Gaz

A. M. Pachole sp. j.

ul. Spokojna 3, 44-109 Gliwice, Poland

VAT No.: PL 9691433231

tel.: +48 32 238 87 94

fax: +48 32 234 92 71

e-mail: [email protected]

p. 1/5

Appendix: PU-Z-032-ENG R02

•

Содержание Sigma SmArt

Страница 1: ...POD 009 ENG R07 User s Manual Gas Detector Sigma SmArt SmArtGas 3 Product code PW 044 X...

Страница 2: ...tel 48 32 238 87 94 fax 48 32 234 92 71 e mail contact atestgaz pl www atestgaz pl We design manufacture implement and support Systems for Monitoring Detection and Reduction of gas hazards We invite...

Страница 3: ...cal installations in hazardous areas Performing the electrical connections in hazardous areas is allowed only for persons having the necessary knowledge experience and authority in the performance of...

Страница 4: ...the document Symbol Interpretation Optical indicator on Optical indicator flashing Optical indicator of Optical indicator status not determined depends on other factors Table 1 Optical indicators sta...

Страница 5: ...4 4 420 relay output only SmArtGas 3 17 5 User s interface 18 6 Life cycle 18 6 1 Transport 18 6 2 Installation 18 6 3 Start up of the installation 22 6 4 Periodical operations 22 6 5 Utilization 30 7...

Страница 6: ...20 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 d...

Страница 7: ...immediate intervention of the service critical failure or those that are only a symptom the user should be notified thereof e g by the control unit in order to plan an overview at a convenient date no...

Страница 8: ...tector s power supply the sensors s working parameters stabilize for some time In this condition the detector does not make measurements Calibration In this state the detector allows to change your se...

Страница 9: ...tandard current signal 4 20 mA It allows for easy integration of the gas detectors with other automation systems e g with industrial controllers Gas detectors with this type of output are marked with...

Страница 10: ...ilation system that uses one of the output pins of Control Unit When performing repair building and maintenance works secure the device in a proper way Before painting the walls make sure the device i...

Страница 11: ...cerning lightning protection It should be remembered that the installation Contractor is responsible for correct installation functioning in the scope of electromagnetic compatibility Conformity to di...

Страница 12: ...g the detector should not be exposed to direct environmental conditions it is necessary to apply the relevant water splash shield or weather housing the oxygen content in the environment especially in...

Страница 13: ...www atestgaz pl 3 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...

Страница 14: ...pply Power supply port Parameters see section 7 Negative supply pole Positive supply pole GND Don t connect 2 SBUS System communication port Used for data exchange between devices in Sigma Gas system...

Страница 15: ...tGas 3 4 2 1 Connection diagram 420 Figure 5 Connection diagram 420 No Name Terminal Description 1 Supply 420 Power supply port Parameters see section 7 Negative supply pole Positive supply pole S Act...

Страница 16: ...rs see section 7 Negative supply pole internally circuited with a negative pole of the port 420 Positive supply pole GND Don t connect 2 SBUS System communication port Used for data exchange between d...

Страница 17: ...m 420 PK Figure 9 Connection diagram 420 PK No Name Terminal Description 1 Supply 420 Device port Parameters see section 7 Negative supply port Positive supply port S Active current output 2 PK1 PK3 N...

Страница 18: ...ied out under the environmental conditions described in the table 7 6 2 Installation 6 2 1 Location of gas detectors The location of detectors should be determined by the system designer and it should...

Страница 19: ...on of the wind likely whereabouts of the people in relation to emission sources detectors should fence of the personnel from the source mechanical shock the detector is made in high strength aluminium...

Страница 20: ...e The suggested cable types are included in the table in appendix 14 When performing electrical connections it is necessary to observe the following order make sure that the connected cables are disco...

Страница 21: ...s possible from the power cables high current cables preferably in separate trays Installation of a gas detection system is not intrinsically safe Damage to the cable is dangerous If the connection wa...

Страница 22: ...sively connect detectors and their gradual start up This makes it easier to find and remove any installation errors The behaviour of the detector after being powered and its operation are described in...

Страница 23: ...itions of installations that should be included in the form of appropriate procedures applicable in the plant The investor or persons indicated by them responsible for safety in the plant define the s...

Страница 24: ...in order to check whether the indication is derived from the existing contamination or whether it is caused by drift characteristics Regardless of the emerging alarms we recommend observing the actual...

Страница 25: ...ions without display allowed only for detectors located outside the zone The following calibration methods are available laboratory method removal of detectors and securing cables so that they present...

Страница 26: ...Check Visual Inspection Calibration Maintenance INFORMATION ON THE DATE OF THE SURVEY INSPECTION Check Calibration Check Visual Inspection Maintenance Calibration Information on the frequency of chec...

Страница 27: ...on is described in section 6 2 2 Below we remind you of only two key observations the handover inspection should provide for the examination of the detectors and the whole alarm track for each detecto...

Страница 28: ...ocessing line Persons directly responsible for the safe operation of the system should be trained regarding the safety regulations at the plant and required to take appropriate action after the event...

Страница 29: ...screw if the screw does not screw in smoothly until it is fully concealed it means that the components of the head are mounted incorrectly supply calibration gas to make sure that the detector works p...

Страница 30: ...ure disposal of waste equipment by handing it over to a designated collection point for the recycling of waste electrical and electronic equipment The proper recycling of your waste equipment at the t...

Страница 31: ...only to SmArtGas 3 Number of relays Parameters option X PK 3 Floating contacts 3 x NO NC 24 V DC 0 2 A Not protected against overloading Digital communication parameters Electric standard Communicatio...

Страница 32: ...depending on the device configuration Product code Current consumption mA 12 V 24 V PW 044 SG SM TS 0 HL 20 20 LCD 45 35 FLED FLED A 125 75 EL ELm VOC DET 0 100 70 LCD 115 80 FLED FLED A 205 125 IR 0...

Страница 33: ...ather Housing DP1WIN Table 10 List of accessories 10 Product marking Type Description Product code Gas Detector SmArtGas 3 PW 044 SG X Gas Detector Sigma SmArt PW 044 SM X Table 11 Method of product s...

Страница 34: ...0 PU Z 093 ENG Instructions for removing the lock of a detector with a catalytic sensor 11 PU Z 074 ENG Example of connection cables for gas detector PW 017 and PW 044 with 4 20 mA output 12 PU Z 076...

Страница 35: ...0 Miko w Poland IEC 60079 29 1 KDB 12 ATEX 0056X EN 60079 29 1 2007 1453 Experimental Mine BARBARA ul Podleska 72 43 190 Miko w Poland 1026 FTZU 03 ATEX Q 004 EN ISO IEC 80079 34 2011 1026 Physical Te...

Страница 36: ...window bright multi colour display 40 60 C FLED A with window bright multi colour display equipped with an acoustic signaller 40 60 C Note 2 At 20 C the display contrast may be reduced difficult to re...

Страница 37: ...see appendix PU Z 054 ENG S HW X X hot wire sensor see appendix PU Z 033 ENG S Sn X X semiconductor sensor see appendix PU Z 030 ENG S IR X X infra red sensor see appendix PU Z 064 ENG S PID X X phot...

Страница 38: ...ght multi colour display 40 60 C FLED A with window bright multi colour display equipped with an acoustic signaller 40 60 C Note 2 At 20 C the display contrast may be reduced difficult to read H head...

Страница 39: ...specified for sensor Atest Gaz A M Pachole sp j ul Spokojna 3 44 109 Gliwice Poland VAT No PL 9691433231 tel 48 32 238 87 94 fax 48 32 234 92 71 e mail contact atestgaz pl p 2 2 Appendix PU Z 055 ENG...

Страница 40: ...sence 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 3 4 Influence of moisture 4 3 5 Influence of v...

Страница 41: ...rs in the vicinity the chemisorption of gas occurs in the presence of oxygen electrons are released and an increase in electrical conductivity of the semiconductor occurs figure 1 The semiconductor ma...

Страница 42: ...semiconductor sensors are non selective cross sensitivity Presence of corrosive gases e g NH3 H2S SO2 causes a decrease in the sensor s sensitivity Reactive gases e g SO2 NOx can overstate or lower re...

Страница 43: ...sensors can operate from 5 to even 10 years However there are a number of factors that can shorten their lifetime high concentrations of poisons e g organometallic compounds organophosphorus compound...

Страница 44: ...n gas 3 3 1 2 Effect of oxygen concentration value 4 3 2 Influence of temperature 4 3 3 Influence of pressure 4 3 4 Influence of moisture 4 3 5 Influence of vibrations impacts 5 3 6 Influence of physi...

Страница 45: ...its resistance Whereas combustion is not possible on the passive element therefore its properties do not change under the influence of a combustible substance This allows the passive element to compe...

Страница 46: ...of such a situation on the detector operation Catalytic sensor working properly at an oxygen concentration of about 21 3 1 1 Impact of the presence of a working gas or other reaction gas Catalytic sen...

Страница 47: ...nitrogen or carbon dioxide then the catalytic detector can give a low or even zero response A similar effect can occur when large amounts of reaction gas are released to the atmosphere creating a con...

Страница 48: ...pparent reading of the presence of a combustible substance 4 Factors shortening the lifetime of the sensor 4 1 Poison and inhibitors For every reaction with the presence of a catalyst that cause perma...

Страница 49: ...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 3 3 Influence of moisture 5 3 4 Influenc...

Страница 50: ...reference electrode is used 5 It has a constant potential that is not dependent on the concentration of the measured gas Owing to electrode reactions electrons are generated whose orderly flow electri...

Страница 51: ...ith the provisions in the User s Manual 3 1 Composition of the controlled atmosphere It is assumed that the standard composition of the atmosphere is a mixture of gases with the proportions indicated...

Страница 52: ...signal does not change e g nitrogen at a carbon monoxide sensor A set of substances exists or may exist for every detector the ones that are inert to the sensor do not react chemically with the sensor...

Страница 53: ...ed atmosphere is within the rated range of the detector operation it does not affect the reading However sudden abrupt changes of humidity in the measured atmosphere can cause momentary appearance of...

Страница 54: ...resence 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 4 Factors shortening the l...

Страница 55: ...f operation of the PID sensor is based on the phenomenon of photo ionization In the PID sensor the gas passes through the UV beam generated by the lamp energized by the current source UV radiation lea...

Страница 56: ...sensor s indication 3 2 Influence of temperature Temperature has an influence on the sensor s operation In the case of specific requirements this influence can be compensated electronically 3 3 Influe...

Страница 57: ...r the influence of UV radiation This leads to lowering the sensor sensitivity the presence of concentrations well beyond the measuring range ambient temperature beyond the range of the environmental p...

Страница 58: ...e 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 3 4 Influence of moisture 3 3 5 Influence of vibra...

Страница 59: ...the resistance of the sensitive element decreases and the output voltage of the bridge increases in proportion to the gas concentration The compensation element constitutes a reference and compensates...

Страница 60: ...nts oil paints aerosols perfumes sprays vapours of spirit gasoline condensing water vapour The prolonged presence of high working gas concentrations causes a decrease in the sensor s sensitivity 3 1 2...

Страница 61: ...ng agents oils greases high concentrations of corrosive gases mainly NH3 H2S SO2 HCl exposure to alkali metals brine and halogens mainly fluorine presence of concentrations well beyond the measuring r...

Страница 62: ...her reaction gas 2 3 1 2 Effect of oxygen concentration value 3 3 2 Influence of temperature 3 3 3 Influence of pressure 3 3 4 Influence of moisture 3 3 5 Influence of vibrations impacts 3 3 6 Influen...

Страница 63: ...s Manual 3 1 Composition of the controlled atmosphere Due to the principle of operation detectors equipped with NDIR sensors can work in a variety of atmospheres including those deprived of oxygen 3 1...

Страница 64: ...rigger the so called microphone effect in the sensor manifested by the change in the read concentration It should be ensured that the detector is not exposed to shock and vibration in excess of the am...

Страница 65: ...gas concentration in the place of the detector operation is beyond the measuring range of the sensor a permanent sensor damage or a false reading of the concentration can occur as a result of the non...

Страница 66: ...ate external diameter mm Maximum cable length m Outdoor installations Indoor installations LiYCYv 300 500 V 3x1 0 LiYCY 300 500 V 3x1 0 9 1 155 LiYCYv Nr 300 500 V 3x1 0 LiYCY Nr 300 500 V 3x1 0 9 1 1...

Страница 67: ...75 LiYCY Nr 300 500 V 6x0 75 11 3 75 LiYCYv 300 500 V 6x0 75 LiYCY 300 500 V 6x0 75 11 3 75 LiYCYv Nr 300 500 V 8x0 5 LiYCY Nr 300 500 V 8x0 5 11 9 100 LiYCYv 300 500 V 8x0 5 LiYCY 300 500 V 8x0 5 11...

Страница 68: ...A Gas Detector signal reference system error 2 25 mA Short circuit in the sensing element supply line 2 75 mA Break in the sensing element supply line 3 00 mA Other critical failure 3 25 mA Temperatur...

Страница 69: ...with a more accurate round cross section made with the use of pressure better sealing in the Ex glands 3 Power source The power supply line should be designed in such a way that at the lowest expecte...

Страница 70: ...V min UPS supply voltage 21V min permissible sensor supply voltage 12 V distance between the control unit and the sensor 800 m Calculations max current consumption of the sensor 2 W 12 V 0 167 A permi...

Страница 71: ...f the cables isolated clamp sleeve shall be placed he conductive part of the clamp sleeve shall have applicable length see 1 For the systems with RS 485 interface it is necessary to make sure that A a...

Страница 72: ...d that cables should be ordered connecting cables should be kept as far away from the detector electronics as possible and routed as directly as possible to the crimp connection it is necessary to min...

Страница 73: ...green The first warning threshold is exceeded red Alarm Modulated sound signal yellow Detector s critical failure white Test calibration 3 Gas detector with LCD display D LCD 3 1 Description of detect...

Страница 74: ...e overload value Indicators 1 2 and ALARM and in the panel are continuously lit The detector still performs measurement which is indicated by continuously lit MONITORING indicator The display shows HH...

Страница 75: ...ashes per 2s _ _ _____ The display shows Test message Non critical failure Detector malfunction that may negatively impact its measurement accuracy e g exceeding of time until periodic calibration or...

Страница 76: ...pl p 4 5 Appendix PU Z 073 ENG R02 ALARM 2 1 Measur ement Warning 2 Gas concentration Warning 1 ALARM Overload ALARM 2 1 Measur ement Sensor Sn0 2 PID electrochemical IR Catalytic sensor No danger De...

Страница 77: ...l is too low bit 13 damage of the temperature detector bit 14 damage of the program block bit 15 damage of the data block AWN failure code Non critical failure malfunction of the defector that may neg...

Страница 78: ...aning of the bits is described in the table below Bit Name Description 0 Collective_W1 Gas concentration is above first warning threshold 1 Collective_W2 Crossing the second warning threshold 2 Collec...

Страница 79: ...rocess e g weather conditions safety potential hazard generated by the mixture criterion B These both criteria have an impact on the final cost of the calibration services and level of competence requ...

Страница 80: ...of flammable components 60 LEL concentration of toxic components NDSCh2 oxygen concentration 25 vol tank 3 dm3 water capacity and p 70 atm specified liquid chemical compounds e g glycerol 1 2 propaned...

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