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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

3.4 Influence of moisture.........................................................................................................................4
3.5 Influence of vibrations, impacts..........................................................................................................4

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

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. 1/4

Appendix: PU-Z-030-ENG R02

•

Summary of Contents for Sigma SmArt

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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