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ABB AO2000-LS25, Manual

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ABB AO2000-LS25 Manual Download Page 69

 

AO2000-LS25

 LASER ANALYZERS  |  OI/AO2000-LS25-EN REV. D 

69

 

 

Mode «Zero» / «Span» 

Zero (Zero) and span check (Span) functionality are optional 
features of the analyzer.  
Refer to 

Calibrating the device <Calibrate instrument>

 on 

page 63. 
 

Fault mode «Instrument Off» 

Fault mode is entered when the device has detected a severe 
failure during the self-test or normal operation, which might 
permanently damage the device.  
 
In this case the instrument stops measuring the gas 
concentration and most instrument functions are turned off. 
This operating mode is indicated on the LCD with <Instrument 
Off>, no gas concentration is displayed, and the bottom line of 
the display indicates the nature of the fault, see 

Diagnosis / 

Troubleshooting

 on page 70. 

 
The instrument automatically attempts a restart after one hour.  

 

 

 

 

 

Summary of Contents for AO2000-LS25

Page 1: ...d part of the Advance Optima series the LS25 can be combined with further analyzer modules and completely operated remotely in Ethernet networks The LS25 has ATEX IECEx and CSA certificates for use in for use in hazardous areas Additional information Additional documentation on AO2000 LS25 is available for download free of charge at www abb com analytical Alternatively simply scan this code ...

Page 2: ... Instructions on cleaning 21 3 Use in hazardous areas in accordance with CSA 22 Introduction 22 Design 22 CSA certification gas analyzer 23 CSA certification power supply unit 23 Ambient conditions 23 Electrical data 23 Power supply 23 Interfaces 23 Safety instructions 23 Electrical connections 24 Safety instructions 24 Cable glands Myers Hubs on the transmitter unit 24 Cable connections 25 Termin...

Page 3: ...on Measurement configuration 57 Gas specific parameters Gas specific parameters 61 Calibrating the device Calibrate instrument 63 TCP IP and modem configuration TCP IP modem configuration 64 File download upload File download upload 65 Manual instrument control 66 Configuration via AO2000 central unit 67 11 Operation 68 Safety instructions 68 Operating mode 68 Start up mode 68 Measuring mode 68 12...

Page 4: ...roduct may only be performed if expressly permitted by these instructions Information and symbols on the product must be observed These may not be removed and must be fully legible at all times The operating company must strictly observe the applicable national regulations relating to the installation function testing repair and maintenance of electrical products Warnings The warnings in these ins...

Page 5: ...gas components listed below Sample components Smallest range Max abs pressure Max temperature O2 0 to 0 1 Vol 10 bar 1500 C NH3 0 to 15 ppm 2 bar 600 C HCl 0 to 5 ppm 2 bar 600 C HF 0 to 2 ppm 2 bar 400 C H2S 0 to 300 ppm 2 bar 300 C H2O ppm 0 to 10 ppm 2 bar 1000 C H2O vol 0 to 0 5 Vol 2 bar 1500 C CO ppm 0 to 30 ppm 2 bar 1500 C CO vol 0 to 0 3 Vol 2 bar 1500 C CO2 ppm 0 to 100 ppm 2 bar 300 C C...

Page 6: ...re a secure connection between the product and your network or any other network as the case may be Operator shall establish and maintain any appropriate measures such as but not limited to the installation of firewalls application of authentication measures encryption of data installation of anti virus programs etc to protect the product the network its system and the interface against any kind o...

Page 7: ...ersion Design A Non hazardous area B Hazardous area Atex IECEx Zone 2 C Hazardous area Atex IECEx Zone 1 D Purge gas inlet E Purge gas lines F Purge gas outlet G Signal cable H Power supply cable 24 V DC I Inputs Outputs 1 Receiver unit 2 Transmitter unit 3 Purging gas valve pressurized encapsulation 4 Interface relays 5 Power supply either in ATEX Zone 2 or outside the hazardous area 6 Purging an...

Page 8: ...d directives All gas analyzer models comply with the regulations of the European Directive 2014 34 EU ATEX Directive IECEx scheme and they are manufactured in accordance with the following standards EN IEC 60079 0 EN IEC 60079 2 EN IEC 60079 28 The gas analyzer must be designed installed and operated in accordance with the following standards and directives EN IEC 60079 14 EN IEC 60079 17 EN IEC 6...

Page 9: ...ectrostatic discharge The safety instructions in Operating instructions on page 21 must be observed Ambient conditions Operating temperature 20 C to 55 C Storage temperature 20 C to 55 C IP rating Designed for outdoor applications all IP 66 certified modules Degree of contamination 2 Installation category overvoltage category II Installation height 2000 m Air humidity 0 to 95 Device data Laser cla...

Page 10: ...air characteristics in accordance with EN 60079 2 pressurized enclosure Ex p Installation NOTICE Damage to the optical components Damage to the optical components due to contaminated purge gas The purge gas must meet the quality requirements in accordance with Table 4 on page 10 Note The gas analyzer meets Ex approval only with a suitably approved purging and monitoring unit for the pressurized en...

Page 11: ...n The customer must check and if necessary set the process specific purge parameters see Purge parameters for pressurized enclosure on page 10 in the purging and monitoring unit during commissioning Pressurized enclosure with nitrogen N2 WARNING Risk of suffocation Risk of suffocation in the event of uncontrolled escaping nitrogen Ensure that all purge gas lines are tight and that the purge gas em...

Page 12: ...ng unit 2 If the minimum flow rate of the purge gas and the overpressure are within the specified limits see Purge parameters for pressurized enclosure on page 10 the purge timer initial purge time can be started 3 After the initial purge time has elapsed the power supply is released for the gas analyzer 4 In the event of an error in one of the sequence steps the controller must be set up to be re...

Page 13: ... must be present Make sure that there is no explosion hazard Before opening the housing switch off the power supply WARNING Risk of suffocation Risk of suffocation when using inert purging gases such as nitrogen N2 Before opening the housing switch off the housing purging Recommissioning after opening the housing Before closing the housing and recommissioning all dust deposits in and on the device...

Page 14: ...nalyzer ATEX Zone 2 version Design A Non hazardous area B Hazardous area ATEX Zone 2 1 Power supply unit 2 Transmitter unit 3 Connection box 4 Cable glands 5 Purge gas connections 6 Receiver unit Figure 5 Device design ATEX IECEx version The analyzer consists of three separate modules Transmitter unit with purge fittings and connection box with terminals for the connection of mains and signal cabl...

Page 15: ...e Tamb 20 C Ta 55 C II 3 G Ex nA nC op is Ga IIC T4 Gc II 3 D Ex tc op is Da IIIC T100 C Dc Table 5 Ex mark according to ATEX IECEx marking IECEx certificate IECEx PRE 20 0071X Ambient temperature Tamb 20 C Ta 55 C Ex nA nC op is Ga IIC T4 Gc Ex tc op is Da IIIC T100 C Dc Table 6 Ex mark according to IECEx Power supply unit TEX 120 124 Ex marking ATEX certificate EPS 08 ATEX 1 137 X Ambient temper...

Page 16: ...le concentrations of flammable gases vapors or liquids or ignitable dusts are unlikely and if they occur then only sporadically and over a short period of time Special operating conditions Possible danger of electrostatic discharge The safety instructions in Operating instructions on page 21 must be observed Ambient conditions Operating temperature 20 C to 55 C Storage temperature 20 C to 55 C IP ...

Page 17: ...cordance with the instructions of the manufacturer and the relevant standard applicable in the country of installation The power supply unit is described in Connecting the power supply on page 44 The power supply is not suitable for installation in Zone 1 areas If the power supply cannot be installed in ATEX Zone 2 or outside the hazardous area an approved and suitable third party power supply uni...

Page 18: ...on page 41 5 Cable gland M20 for power supply and analog inputs Power supply and signals from the external sensors Connection assignment see Power supply analog inputs on page 41 During installation the clamping range for lines as well as the tightening torque of the cable gland and the union nut must be observed Cable gland Clamping range for lines and tightening torque of cable gland and union n...

Page 19: ...e transmitter unit terminal box see Transmitter unit signal cable to receiver unit on page 26 and Transmitter unit power supply analog inputs on page 20 If not pre assembled at the factory connect the signal cable to the receiver unit see Receiver unit signal cable on page 20 The input signals such as external temperature and pressure sensors are connected to the corresponding terminals in the tra...

Page 20: ...The voltage for alignment purposes see Setting the maximum transmission on page 48 is also available at plug J14 Receiver unit signal cable Terminal Wire pair Color Signal 1 7 Green White Servo Sig 2 3 4 7 Green Brown Servo 5 V 5 3 Grey RU Temp 6 3 Pink RU Temp 7 4 Blue MODSQ 8 4 Red MODSQ 9 5 Black RU PWR 10 5 Violet RU GND 11 6 Grey Pink RU GND 12 6 Blue Red RU PWR 13 1 White Direct 14 1 Brown D...

Page 21: ...or straight through connection switch J2 1 White Orange TX 2 Orange TX 3 White Green RX 4 Green RX For cross over connection direct to PC J2 1 White Green TX 2 Green TX 3 White Orange RX 4 Orange RX Table 13 Transmitter unit Ethernet connection Operating instructions Protection against electrostatic discharges DANGER Risk of explosion The painted surface of the device can store electrostatic charg...

Page 22: ...g due to dangerous chain reactions in piping systems and igniting the external hazardous area When properly installed and sealed with a CSA UL listed sealing compound this prevents the passage of gases vapors or flames from spreading from a hazardous location to a nonhazardous location Note The installation instructions of the manufacturer of the conduit sealing must be observed without fail Desig...

Page 23: ...to 55 C IP rating Designed for outdoor applications all modules IP 66 certified IP rating is not part of the CSA certification Degree of contamination 2 Installation category overvoltage category II Installation height 2000 m Air humidity 0 to 95 Electrical data Power supply Power supply unit input 85 to 264 V AC 50 60 Hz Power supply unit output 24 V DC maximum 5 A Transmitter unit input 18 to 32...

Page 24: ...scribed in Connecting the power supply on page 44 Configuration parameterization of the device The PC with the software for service communication with the analyzer must be placed in an explosion safe area For long distance communication it is recommended to use the optional Ethernet connection Cable glands Myers Hubs on the transmitter unit Figure 8 Cable glands Myers Hubs on the transmitter unit ...

Page 25: ...nsmitter unit terminal box see Transmitter unit signal cable to receiver unit on page 26 and Transmitter unit power supply analog inputs on page 26 If not pre assembled at the factory connect the signal cable to the receiver unit see Receiver unit signal cable on page 26 The input signals such as external temperature and pressure sensors are connected to the corresponding terminals in the transmit...

Page 26: ...r alignment purposes see Setting the maximum transmission on page 48 is also available at plug J14 Receiver unit signal cable Terminal Wire pair Color Signal 1 7 Green White Servo Sig 2 3 4 7 Green Brown Servo 5 V 5 3 Grey RU Temp 6 3 Pink RU Temp 7 4 Blue MODSQ 8 4 Red MODSQ 9 5 Black RU PWR 10 5 Violet RU GND 11 6 Grey Pink RU GND 12 6 Blue Red RU PWR 13 1 White Direct 14 1 Brown Direct 15 2 Gre...

Page 27: ...terminal 8 8 Clear To send Connected to terminal 7 9 Ring Indicator Not assigned Table 18 Transmitter unit RS232 connection Alternatively connector J15 may be used remember Gender Changer Transmitter unit network interface Ethernet Terminal Color code Signal For straight through connection switch J2 1 White Orange TX 2 Orange TX 3 White Green RX 4 Green RX For cross over connection direct to PC J2...

Page 28: ...ging and alignment units which in turn are mounted onto the DN50 process flanges see Figure 20 on page 36 The optical alignment is easy and reliable The purging prevents dust and other contamination from settling on the optical windows The power supply unit transforms 85 to 264 V AC to 24 V DC if 24 V DC is available the transmitter can be connected directly The power supply box is connected to th...

Page 29: ...gths The measuring principle is illustrated in Figure 11 1 Transmission 2 Absorption line Figure 11 Absorption line of AO2000 LS25 The laser wavelength is scanned across a chosen absorption line of the gas to be measured The absorption line is carefully selected to avoid cross interference from other background gases The detected light intensity varies as a function of the laser wavelength due to ...

Page 30: ...er unit B Transmitter unit C AO2000 central unit D Service PC E Power supply unit 1 Purge gas outlet housing purging 6 mm 2 Purge gas inlet housing purging 6 mm 3 Calibration gas outlet 6 mm 4 Calibration gas outlet 6 mm 5 Tap hole M8 6 Purge gas inlet flange purging 10 mm 7 Optical distance 0 5 to 15 m 1 6 to 49 2 ft 8 CAT5 cable for outdoor use or for direct earthing with double PVC sheath Figur...

Page 31: ...n of the device on page 51 for more details Laser classification and warnings WARNING Risk of injury Eye injury due to invisible laser radiation The device contains diode lasers of class 1 and 1M Do not open when energized Do not view directly with optical instruments The diode lasers used in the analyzer operate in the near infrared NIR range between 700 and 2400 nm depending on the gas to be mea...

Page 32: ...osion de energize before opening 8 Sample component 9 Ambient temperature 0 Power supply k Project number l Type designation model m Production number Figure 14 Name plate AO2000 LS25 example ATEX IECEx version Zone 2 LS25 Compact name plate ATEX IECEx Zone 2 Transmitter unit Receiver unit 1 Manufacturer 2 Serial number 3 Production date 4 Ex marking 5 Warning laser class 1 6 Warning do not open w...

Page 33: ...ation Observe the permitted ambient conditions for transport and storage Avoid storing the device in direct sunlight In principle the devices may be stored for an unlimited period However the warranty conditions stipulated in the order confirmation of the supplier apply Storage temperature range 20 to 55 C 4 to 131 F Returning devices Use the original packaging or a secure transport container of a...

Page 34: ...d be as constant and homogeneous as possible e g no measurement directly behind a line arc The optical measuring path optical path should pass through the center of the pipe The dust concentration should be as low and homogeneous as possible Flow conditions at measuring point When deciding the placement of the analyzer in the process we recommend a minimum of 5 stack diameters of straight duct bef...

Page 35: ...d C D Figure 19 should fulfill the specifications in the table to ensure that the tubes do not shield the laser beam Flange type min DN 50 40 mm DN 80 55 mm Figure 19 Flange line up tolerances After correct adjustment and line up of the device the maximum allowed drift in angle between laser beam and receiver unit center axis due to temperature effects or vibration is 0 3 without having effect on ...

Page 36: ...gnment Make sure that the mains cable is disconnected or that the power is disconnected before performing the electrical connection Make sure that the power plug is the disconnecting device no separate mains switch on device and the power socket should be placed easily accessible for the operator Perform installation of the device as described in the following steps 1 Install the purging flanges 5...

Page 37: ...responding cable Ensure that the sensors used are suitable for process conditions and have a resolution suitable for the application The analyzer can now be switched on see Commissioning on page 46 Air purging of flanges The instrument windows are kept clean by setting up a positive flow of air through the flanges and into the stack This purging will prevent particles from settling on the optical ...

Page 38: ...intain a purge gas level of more than 99 5 for one hour Isolation flanges Figure 21 Isolation flange Example For toxic gas and highly corrosive applications especially in combination with high pressure the first flange has to be an isolation flange which isolates the process from the analyzer In these cases a shut off valve is always necessary in order to do maintenance on the flange The isolation...

Page 39: ...ng only and do not necessarily correspond to the polarities of the applied voltages All potentials are floating and none of them should be grounded to box This applies to all connection tables Transmitter unit interface Figure 23 Electrical connections on the transmitter unit viewed from below Pos Description 1 Connector for receiver unit signal cable Power supply and signals from and to the recei...

Page 40: ...ble 21 Pin assignment of the receiver unit Phoenix plug Internally connected to the alignment jack Signal Description Lineup Alignment voltage RU Temp Signal from embedded receiver temperature sensor MODSQ Modulation signal from transmitter to receiver used for detection of 2 harmonic RU PWR Power supply to receiver unit Direct Direct laser transmission signal from receiver detector 2 Harmonic Det...

Page 41: ...tions Phoenix connectors Cables may be replaced at the transmitter end of the cable see Connecting analog inputs option on page 45 Note All 3 power pairs PWR PWR should be wired to ensure even current flow through the connector External temperature and pressure sensors are connected to the connector of the transmitter end of the cable see Connecting analog inputs option on page 45 Service interfac...

Page 42: ...work cable to LS25 Figure 24 Ethernet connection AO2000 with one laser analyzer In the event of integration of the AO2000 into a customer network the 1st Ethernet interface X09 must be used for connection to the customer network whereas the 2nd Ethernet interface X08 must be used for connection of the analyzer to the central unit of the AO2000 The advantage of this configuration is that the plant ...

Page 43: ...t interface X08 via its uplink port For the connection between the laser analyzer and the switch a standard network cable is necessary Each laser analyzer must have a unique IP address within the same network group as the Ethernet interface The 1st Ethernet interface X09 is used e g to connect AO2000 to the customer network Example of set IP addresses AO2000 1 Ethernet interface X09 192 168 1 1 2 ...

Page 44: ...ion 1 GND 2 GND 3 GND 4 24 V DC 5 24 V DC 6 24 V DC 7 Connected to the power supply housing Table 28 Pin assignment output 24 V DC Transmitter unit Fuses and LEDs 1 Buffer battery 2 Reset key 3 Control LED voltage 5V OK 4 Fuse 5 Control LED power supply 18 to 36V OK 5 Control LED voltages 24 V 15 V 15 V OK Figure 27 Mainboard card fuses and LED layout The main transmitter unit board has one main f...

Page 45: ... mm2 AWG 26 to 20 ABB recommends 0 25 mm2 The outer cable diameter 1 per cable gland must be in the 3 to 9 mm range The internal burden of the analog input is 100 Ω For passive sensors a 24 V power supply with a maximum current load capacity of 80 mA is available terminals 24 V AGND 6 Reinstall the plug insert in the plug housing and tighten it Tighten the cable glands 7 Attach the power supply an...

Page 46: ...t up mode showing Figure 31 Start up sequence The start up sequence will make sure the laser is tuned to the correct temperature before it is switched on and the instrument performs a self test on all systems Allow about 5 minutes for the instrument to start the laser The LCD will probably show Laser line up error and Low transmission when the laser has started up This is normal and indicates misa...

Page 47: ...nt procedure 1 laser alignment device laser pointer and focusing screen 2 spanners to adjust the flanges with M 16 1 Allen key 5 mm for the stud screws WARNING Risk of injury Eye injury due to invisible laser radiation The device contains class 1 and 1M diode lasers Do not open when energized Do not look into the optical path with optical instruments Mounting the adjustment device 1 Leave the devi...

Page 48: ...until the ends of the screws no longer stick out of the holes 2 Switch on the laser pointer 3 Align the purging flanges by adjusting the 4 screws item 5 in Figure 32 until the laser beam hits the center of the focusing screen 4 Screw in the 4 stud screws until they stop so that the setting is fixed 5 Switch off the laser pointer 6 Remove the laser pointer and focusing screen Setting the maximum tr...

Page 49: ... analyzer is supplied with the instrument and will run under Microsoft Windows The software does not require any installation 1 Copy the software supplied to a separate directory named e g AO2000 LS25 on the hard disk 2 Connect the PC serial port to the RS 232 connection on the transmitter unit see Transmitter unit interface on page 39 using the supplied serial cable and gender changer adapter Opt...

Page 50: ...TCP IP modem configuration on page 64 Setting up the laser analyzer in AO2000 1 Call up the MENU Configure System Setup system modules menu and press the NEW key The IP address shown in the picture is an example 2 Enter the 14 digit serial number of the analyzer located on the back of the transmitter housing on the name plate The first three digits must be 008 and the serial number is specific to ...

Page 51: ...nd the laser beam transmission Plot the measured concentration as a function of time Log the concentration and other control parameters to a file Display the measured signal Save the measured signal and other control parameters to a file Observe and erase the instrument error logging Configure the 4 to 20 mA process temperature and pressure inputs Change the measurement averaging time Set the opti...

Page 52: ...n mode must be selected User mode User mode Advanced mode Advanced mode unrestricted access to all device parameters Demo mode No connection to device Note If another LS25 gas analyzer is to be configured the service program must be closed and opened again It is possible to open several program windows simultaneously to communicate with different devices with one PC User mode User mode This User m...

Page 53: ...uring mode of the device This is optional and only for devices with zero span check 3 different measuring modes can be selected by clicking the Mode button Refer to Operating mode on page 68 Note Maintenance mode Maintenance is not available for the LS25 Concentration Instant Displays the last value calculated by the analyzer with no averaging This is in the following called a primary measurement ...

Page 54: ...ure Electrically measured temperature is the temperature measured by the embedded temperature sensors only used when the gas temperature is equal to ambient temperature offset corrected to be equal the ambient air temperature In the example above the gas temperature is set equal to the Spectral temperature These settings can be configured in the Measurement configuration menu Gas Pressure Bar abs ...

Page 55: ...nal Second harmonic signal displays signals recorded by the device for calculation of the gas concentration Yellow 2 Harmonics filtered Pink 2 Harmonics detected Figure 37 Menu Second harmonic signal example This signal is also useful for inspection and analysis of the absorption spectra verification of proper laser function and fault diagnostics In total three curves are displayed the normalized ...

Page 56: ... all data displayed in the Measurements menu can be logged to an ASCII file at specified regular intervals Figure 38 Menu Custom Logging The sampling period logging interval file directory and the filename are user defined default filename is gmYYMMDD log If New file at midnight is selected the program will create a new logging file at every midnight with the default filename reflecting the new da...

Page 57: ...seful for advanced diagnostics and faultfinding and downloaded to a text file by pressing Save system log Older system information may be downloaded by pressing Rewind system log 100 lines and subsequently Save system log In case of instrument failure it is always useful to download the error log and the system log and send both files to ABB for diagnostics Measurement configuration Measurement co...

Page 58: ... bara 1 013 P psig 14 5 The gas temperature is always given in Celsius To convert temperature from Fahrenheit to Celsius use the following formula T C T F 32 1 8 To convert temperature from Kelvin to Celsius use the following formula T C T K 273 Pressure and temperature input method The Pressure Temperature input method specifies whether the values are fixed or are read using any of the following ...

Page 59: ...le to restore the original setting when required This parameter is only important if the measured gas is present in the internal device volume so that the additional gas absorption must be compensated for Note For this compensation to work the gas concentration in the RU and TU must be specified in the Gas specific parameters menu Gas specific parameters Gas specific parameters on page 61 Gas temp...

Page 60: ... the extra denoted as Flow current input to the instrument This can be set to None Gas vol Gas g Nm3 Gas g m3 and Flow Input None simply deactivates the extra current input For all other inputs the 4 mA and 20 mA values must be specified The current input can be used to connect an external gas sensor typically an H2O sensor for dry basis conversion to the device In this case Gas input with the cor...

Page 61: ...nabled the device calculates the saturated water vapor concentration which is based on the input values of the gas temperature and the gas pressure The calculated H2O concentration is then used for dry basis conversion The maximum gas temperature for this method is approximately 90 C the calculated max H2O concentration being limited to 70 vol The same H2O restriction is used for the methods Fixed...

Page 62: ...es the corresponding gas concentration must be set to zero Make sure that the appropriate optical path lengths are specified in the Measurement configuration menu Min Max line position 0 63 These values define the acceptance window in samples for the line position in the second harmonic signal see Second harmonic signal Second harmonic signal on page 55 The values cannot be modified if the program...

Page 63: ...e amplitude and line width for gas B are adjusted according to the calibration of gas A This is useful when only one calibration gas is present or when the reference ratio of the measured concentrations is maintained even after the calibration In Figure 44 NH3 is calibrated to 25 ppm The calibration constants for H2O will be adjusted accordingly A signature for identifying the calibration can be e...

Page 64: ...ure range Calibration mode PROPORTIONAL GLOBAL is common for all gases Nevertheless it is possible to calibrate one gas in global mode and another in proportional mode In this case the mode is set to GLOBAL and the line width measurements for the gas which should be calibrated proportionally must be switched OFF in the Gas specific parameters menu only for the program running in Advanced mode It c...

Page 65: ...ed and analyzed Alternatively in the Second harmonic signal menu you can download all instrument displays see Second harmonic signal Second harmonic signal on page 55 After pressing Download settings the device setting parameters are downloaded and written to a file with the specified name The setting file is useful as backup of the device settings It is useful to save the current device settings ...

Page 66: ...eep mode Reset Microcontroller Microcontroller is reset Collect AD statistics For service purpose only Current loops and digital i o This menu is for testing the 4 to 20 mA inputs or outputs mainly during installation of the analyzer Note that the instrument will be set into sleep mode for these tests Save system log See View error log on page 57 Rewind system log 100 lines See View error log on p...

Page 67: ...g m3 ppm g Nm3 mg Nm3 Meas range Neg concentration display of negative measured values on or off Temperature input method fixed value 4 20 mA internal sensor AO2000 correction Value fixed temperature value in K Value at 4 mA temperature value for 4 mA at current input Value at 20 mA temperature value for 20 mA at current input Pressure input method fixed value 4 20 mA internal sensor AO2000 correc...

Page 68: ...re stabilizes When the number is below 0 3 the instrument slowly powers up the laser The start up mode normally lasts less than 3 minutes Measuring mode While the operating mode is measuring the device can be in one of the following three modes Normal Measuring mode Zero Zero point measurement Span Span measurement with span cell Note Maintenance mode Maintenance is not available for the LS25 The ...

Page 69: ...tected a severe failure during the self test or normal operation which might permanently damage the device In this case the instrument stops measuring the gas concentration and most instrument functions are turned off This operating mode is indicated on the LCD with Instrument Off no gas concentration is displayed and the bottom line of the display indicates the nature of the fault see Diagnosis T...

Page 70: ... the analyzer PLC P read error ERROR Failure reading pressure through 4 to 20 mA analog input The input current from the pressure sensor is either above 23 7 mA or below 0 3 mA Check the electrical connection of the external pressure sensor Alternatively use the fixed pressure setting in the analyzer T read out of range WARNING Input current from temperature sensor is either above 22 mA or below 3...

Page 71: ...system log and contact ABB Service Low line position High line position No absorption line ERROR The device has detected a spectroscopic fault This can have several causes Unknown interference gas in process incorrect laser temperature wavelength transmitter unit is operating outside acceptable temperature range or laser malfunction Check the device with the calibration cell with a gas concentrati...

Page 72: ...sion 371 The temperature input signal exceeds the permissible range x T out of range 372 The pressure input signal exceeds the permissible range x P out of range 374 No measurement The detector signal is too low x x Laser line up error 375 The input current loop 4 20mA has an error x x T read error P read error 376 This LS25 module is under maintenance x Communication with service software via RS2...

Page 73: ...explosion protection ensure that no potentially explosive atmosphere can occur WARNING Risk of injury Risk of injury due to maintenance work being carried out incorrectly The work described in this chapter require special knowledge and may require work to be done on the gas analyzer while it is open and under voltage Maintenance work on the gas analyzer should be performed by qualified and special...

Page 74: ...ou are in doubt about your device Check calibration every 3 to 12 months depending on the required accuracy Recalibrate if necessary see Calibration of the device on page 76 After each calibration check save device settings and measurement data recorded with some gas see File download upload File download upload on page 65 This is for tracking purposes in case of future service issues Carry out ma...

Page 75: ...or and Low transmission alternately In this case realign the transmitter and receiver units see Align analyzer with laser alignment device on page 47 and Setting the maximum transmission on page 48 Optimizing purging gas flow of the flanges It is generally difficult to give a recommendation of what purge gas quantity is needed for certain applications The required purge gas volume depends on the f...

Page 76: ...cate is supplied with the device There is therefore no need for the user to calibrate the instrument upon reception After some period of operation the device parameters may change due to aging of the diode laser In this case a new calibration might be necessary ABB recommends verifying calibration of the device once a year using a certified sample gas and the supplied calibration cell The certifie...

Page 77: ...ure difference depends on the flow rate and the diameter and length of the outlet tubes It is therefore highly recommended to measure the gas pressure close to the cell using an absolute pressure sensor in order to provide the device with correct gas pressure during the verification and calibration procedure If only the ambient pressure is known or the pressure sensor is located far away from the ...

Page 78: ...ak tightness e g by testing with slight overpressure 3 Connect the calibration cell temperature and pressure sensors to the AO2000 LS25 see Connecting analog inputs option on page 45 4 Switch on the device the device must be operational for at least 1 hour before performing the verification and or calibration 5 Start the service program see Software start up on page 52 6 Make sure that the measure...

Page 79: ...20 mA inputs can also be used if these sensors are connected to the calibration cell One can also use the readings of the internal sensors if these are close to the values for the calibration cell It is also important to use dry gas mixed with nitrogen For O2 dry air can be used Use GLOBAL calibration If spectral properties of the laser seem to have drifted This can be evaluated by qualified servi...

Page 80: ... 53 The instrument calculates and stores the absorption signal for the gas concentration measured in normal mode just before the span check The absorption signal is continuously subtracted from the measured signal during span check operation The resulting signal therefore corresponds to the signal from the internal cell or span cell providing that the signal from the process remains stable The amb...

Page 81: ...orded with the internal temperature and pressure sensors located inside the receiver unit is used to calculate the concentration of the span gas By default the internal span cell is calibrated to give a 75 to 80 of full scale reading Alternative calibration is possible contact ABB or your local distributor 14 Decommissioning Temporary shutdown 1 Switch off the power supply 2 Switch off the purging...

Page 82: ...gas lines 3 Remove the transmitter unit or receiver unit taking into account the weight of the transmitter unit or receiver unit 4 Remove the purging flanges and seal the openings of the installation flanges so that they are gas tight 5 If the device is to be used at another location the device should preferably be packaged in its original packing so that it cannot be damaged 6 Notice the notes in...

Page 83: ...analytical Title Doc ID Advance Optima AO2000 Series Continuous Gas Analyzers Data Sheet DS AO2000 Advance Optima AO2000 Series Continuous Gas Analyzers Operating Instruction OI AO2000 Advance Optima Function Blocks Descriptions and Configuration Technical Information 30 24 200 AO HMI Remote Control Interface Technical Information 30 24 311 AO2000 Series PROFIBUS DP PA Interface Technical Informat...

Page 84: ...pany Address Contact person Telephone Fax Email Device details Type Serial no Reason for the return description of the defect Was this device used in conjunction with substances which pose a threat or risk to health Yes No If yes which type of contamination please place an X next to the applicable items biological corrosive irritating combustible highly extremely combustible toxic explosive other ...

Page 85: ...AO2000 LS25 LASER ANALYZERS OI AO2000 LS25 EN REV D 85 Notes ...

Page 86: ...86 AO2000 LS25 LASER ANALYZERS OI AO2000 LS25 EN REV D Notes ...

Page 87: ...AO2000 LS25 LASER ANALYZERS OI AO2000 LS25 EN REV D 87 Notes ...

Page 88: ...or notice With regard to purchase orders the agreed particulars shall prevail ABB does not accept any responsibility whatsoever for potential errors or possible lack of information in this document We reserve all rights in this document and in the subject matter and illustrations contained therein Any reproduction disclosure to third parties or utilization of its contents in whole or in parts is f...

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