© Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer ■ Overview SITRANS SL is a diode laser gas analyzer with a measuring principle based on the specific light absorption of different gas components. SITRANS SL is suitable for fast, non-contact measurement of gas concentrations in process or flue gases. An analyzer consisting of transmitter and receiver units (sensors) is used for each measuring point. The hardware for further processing of the measured signal into a concentration value, as well as the monitoring, control and communication functions, are integrated in these two main modules. The sensors are designed for operation under harsh environmental conditions. ■ Application Applications • Control of combustion processes • Process optimization • Plant and operator safety • Process measurements in all types of power and combustion plants • Process control • Explosion protection • Measurements in corrosive and toxic gases • Quality control Sectors • Chemical and petrochemical plants • Power plants • Waste incinerators • Iron and steel industry SITRANS SL ■ Benefits The in-situ SITRANS SL gas analyzer features high operational availability, unique analytical selectivity, and a wide range of possible applications. SITRANS SL permits measurement of a gas component directly in the process: • With high dust load • In hot, humid, corrosive, explosive, or toxic gases • In applications showing strong varying gas compositions • Under harsh environmental conditions at the measuring point • Highly selective, i.e. mostly without cross-sensitivities Special features of the SITRANS SL: • Little installation effort • Minimum maintenance requirements • Extremely rugged design • High long-term stability through built-in, maintenance-free reference gas cell • Real-time measurements Moreover, the analyzer provides warning and error messages: • When maintenance is required - With large variations in the reference signal - With poor signal quality • If the transmission violates an upper or lower limit Siemens AP 01 · 2015 2/31 2 © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer ■ Design 2 The SITRANS SL gas analyzer consists of a pair of cross-duct sensors, a transmitter unit and a detector unit, both with the same dimensions. The complete analyzer is integrated in these two enclosures. The transmitter unit contains the laser source whose light is transmitted to the receiver through the measurement path. The detector unit contains a photodetector including electronics as well as a reference cell. The detector unit is connected to the transmitter unit by means of a sensor cable. A further cable on the receiver is used to connect the power supply and the communication interfaces. The receiver enclosure contains a local user interface (LUI) with an LC display which can be read through a window in the cover. The LUI is operated by remote-control. Transmitter and detector units Special features of the transmitter and detector units: • In-situ cross-duct sensors, designed as transmitter and detector units, connected via sensor cable • Powder-coated aluminium; stainless steel • Degree of protection IP65 • Adjustable process connection plates • Flange sizes (provided by customer): DN 50/PN 25, ANSI 4’’/150 lbs • Purging gas connections (see "Purging") • Optional: Explosion-protected version in accordance with - Ex II 2G Ex de op is IIC T6 Ex II 2D Ex tD A21 IP65 T85°C Local user interface (LUI) of SITRANS SL in the detector unit (display of measured value) Remote control keypad for SITRANS SL Connection cables SITRANS SL is supplied as standard without connecting cables. These must be provided by the customer or are available as accessories. Exception: The standard ATEX version is supplied with pre-installed cabling. SITRANS SL, detector unit Parts in contact with the process gas Only the stainless steel flange of the sensor with borosilicate window and FFKM gasket is wetted by the process gas. This has optional connections for purging the process gas side with an appropriate gaseous medium. Display and control panel Special features of the detector unit: • Display for simultaneous output of result and device status • LED backlighting of display • Remote control with infrared interface for simplified configuration and operation for safe implementation in hazardous areas • Menu-driven operation for parameterization and diagnostics 2/32 Siemens AP 01 · 2015 The sensor cable connects together the transmitter and detector units of the analyzer. The sensor connecting cable available as a cable set for the ATEX version as standard, and for non-Ex applications optionally, is offered in lengths of 5, 10 or 25 m. This (optional) cable set also enables permanent installation of an Ethernet cable used for service and maintenance purposes. A rugged cable sleeve should be used as UV protection for installations in open cable ducts or channel systems. The statutory directives must be observed in the event of installation in hazardous areas. For the ATEX version of SITRANS SL, the sensor connecting cable must be connected between the two Ex-e terminal boxes secured on the transmitter and receiver units. © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer Inputs/outputs • 2 analog inputs (4 to 20 mA) for process gas temperature and pressure • 2 analog outputs (4 to 20 mA) for gas concentration or for concentration and transmission • 1 configurable binary input • 2 configurable binary outputs (display of faults, maintenance requirement, function monitoring, alarms for limit violations of measured value or transmission) • 1 Ethernet 10Base-TX port, only for servicing and maintenance The PROFIBUS DP protocol provides DPV0, cyclic data. Measured values are provided with additional quality data. Optional • 1 Modbus interface with - Output of concentration as cyclic data - Alarm output, alarm classification - Input for temperature and/or pressure data for compensation • 1 PROFIBUS DP interface with: - Output of concentration as cyclic data - Alarm output, alarm classification - Input for temperature and/or pressure data for compensation Note: In contrast to the other interfaces, the Ethernet plug-in connector on standard non-Ex devices is only accessible following removal of the detector unit cover. With the help of the sensor connection cable set (optional with non-Ex devices), an Ethernet cable can be permanently installed via the terminal box of the sensor connecting cable. The Ethernet connection via the sensor connecting cable can also only be used for temporary service and maintenance purposes. NOTICE: In an Ex environment, Ethernet connections may only be made or removed with the permission of the plant operator! ■ Function Operating principle SITRANS SL is a gas analyzer employing single-line molecular absorption spectroscopy. A diode laser emits a beam of infrared light which passes through the process gas and is received by a detector unit. The wavelength of the laser diode output is tuned to a gas-specific absorption line. The laser continuously scans this single absorption line with a very high spectral resolution. The degree of absorption and the line shape are used for the evaluation. Transmitter Receiver Optics tube (transmitter) Optics tube (receiver) Laser Optics Laser electronics Optics Measured volume Electric interface Reference cell Detector Optics Reference cell Electric filter Optics Electric interface Sensor head (transmitter) Sensor head (receiver) Computer for control and evaluation Laser control Electric interface Customer interface Local display Measurement External sensors Alarms for compensation Basic design of the SITRANS SL Siemens AP 01 · 2015 2/33 2 © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer The field design of the SITRANS SL in-situ gas analyzer consists of a transmitter unit and a detector unit. The light which is not absorbed by the sample is detected in the receiver. The concentration of the gas component is determined from the absorption. The SITRANS SL analyzer measures a single gas component by means of the absorption capacity of a single fully resolved molecular absorption line. 2 Reference signal Absorption Measured signal Wavelength [nm] Configuration A feature of the in-situ analytical procedure is that the physical measurement takes place directly in the stream of process gas and directly in the actual process gas line. All process parameters such as gas matrix, pressure, temperature, moisture, dust load, flow velocity and mounting orientation can influence the measuring properties of the SITRANS SL and must therefore be investigated for each new application. The standard applications listed in the ordering data for the SITRANS SL are distinguished in that the typical process conditions are adequately well-known and documented. If you cannot find your application among the standard applications, please contact Siemens. We will be pleased to check your possible individual application of the SITRANS SL. You can find an application questionnaire on the SITRANS SL product site on the Internet: www.siemens.com/insituquestionnaire Process flange - Dimensions - Temperature Gas concentration Flue gas composition Dust load Gas velocity Gas temperature Gas pressure Purging tube length Receiver Transmitter Absorption spectrum of measured signal and reference signal with SITRANS SL SITRANS SL is designed for measuring oxygen (O2) and carbon monoxide (CO) at high sensitivity. Measuring path length Typical application specifications: Process pressure/temperature conditions (with O2 application) 700 ... 5 000 hPa (absolute)/0 ... 200 °C 900 ... 1 100 hPa (absolute)/0 ... 600 °C Carbon monoxide concentration Smallest measuring range: 0 … 100 ppm @ 1 m Largest measuring range: 0 … 6 000 ppm @ 30 cm Process gas pressure/temperature conditions with CO application 700 … 2 000 hPa (absolute) / -20 … 300 °C 800 … 1 200 hPa (absolute) / 300 … 700 °C The measuring performance of the SITRANS SL depends, among others, on the actual, individual process conditions with regard to concentration ranges, pressure and temperature. An internal reference cell is used to constantly check the stability of the spectrometer. The self-calibration of the analyzer is therefore valid for one year without the necessity for external recalibration using calibration gases. 2/34 Siemens AP 01 · 2015 Sensor cable Purging on the sensor side 0 ... 100 vol % Purging on the process side Oxygen concentration Typical cross-duct arrangement of the SITRANS SL The SITRANS SL can be optionally purged on the process side using appropriate purging gases to prevent contamination of the sensor optics on the process side. Purging tubes on the sensor heads, which slightly extend into the process gas stream, define the effective measuring path length. © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer Influences on the measurement Pressure Dust load In addition to the temperature signal, an external pressure signal can be fed to the instrument to provide complete mathematical compensation for the pressure influence including the density effect. Without compensation, the relative error caused by changes in the process gas pressure is approx. 0.1 %/hPa. An external pressure signal is therefore recommended in most cases. As long as the laser beam is able to generate a suitable detector signal, the dust load in the process gas does not influence the analytical result. By applying a dynamic background correction, measurements can be carried out without any negative impact. Under optimal conditions, the SITRANS SL can cope with dust loads up to 20 g/Nm³ and up to a measured path length of 8 m. The influence of a high dust load is extremely complex, and depends on the optical path length and particle size. The optical damping increases exponentially at longer path lengths. Smaller particles also have a very large influence on the optical damping. With high dust load, long path length and small particle size, the technical support at Siemens should be consulted. Temperature The influence of temperature on the absorption line is compensated by a correction file. A temperature signal can be fed into the instrument from an external temperature sensor. The signal is then used for mathematical correction of the influence of the temperature on the concentration strength. If the process gas temperature remains constant, a static correction can be carried out as an alternative. Without temperature compensation, the relative error caused by changes in the gas temperature has an extensive effect on the measurement (e.g. up to 0.24 %/K with the O2 application). An external temperature signal is therefore recommended in most cases. Transmitter unit Flange connection plate (process interface) Effective optical path length As a result of Beer-Lambert’s law, the absorption of laser light depends on the optical path length within the sample gas. Therefore the precision of the effective optical path length measurement can have an effect on the precision of the total measurement. Since the sensor optics on the process side usually has to be purged to keep it clean for a longer period, the extent of the mixed zone between the purging medium and the process gas as well as the latter’s concentration distribution must be considered. In a typical in-situ installation with an optical path length of several meters, the influence of the purging gas on the effective path length can be ignored. The maximum possible path length and dust load mutually affect each other: the higher the dust load in the process, the shorter the max. possible path length. Receiver unit Connecting cable (optional) Customer flange Cable gland Purging tube (optional) Sensor connecting cable (optional) Reference cell integrated into receiver unit Cable gland Sensor connecting cable (optional) Design of the non-Ex version of the SITRANS SL system Siemens AP 01 · 2015 2/35 2 © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer Connection cable Analog-I/O, Modbus Transmitter unit Connection cable PROFIBUS DP Receiver unit Connection cable 2 ATEX cable gland Remote control ATEX cable gland Cable gland ~1 m ~1 m Lmax= 25 m Ex-e junction box Ex-e junction box Design of the ATEX version of the SITRANS SL system Conduit connection 1/2” NPT (not shown) Conduit connection 1/2” NPT (not shown) Transmitter unit Ui: 30.2 V DC Pi: 10 VA Receiver unit Remote control FM label Conduit connection 1/2” NPT (not shown) Design of the FM version of the SITRANS SL system The transmitter and detector units are mounted on process flanges provided by the customer. Correct alignment of these flanges must be guaranteed, e.g. by using the optional sensor alignment kit. 2/36 Siemens AP 01 · 2015 FM label © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer Adjustment of the pair of sensors The flange connection plates (process interface) of the SITRANS SL to the process flanges on the customer side must be correctly aligned so that the laser beam generated by the transmitter hits the photodetector in the detector unit This is guaranteed in that the transmitter and detector units have a curved surface integrated in the connection plates. The adjustment is carried out by shifting the flanges on these surfaces, through which the symmetry axis is aligned. The axis can be offset by ± 1 degree, which means that the process flanges must be welded onto the process wall with at least this accuracy - see following figure. Min. 150 mm 2 Approx. 25 to 40 mm PROCESS Maximum deviation ± 1° Process flange Wall thickness (incl. insulation) Is measured following installation Installation/adjustment requirements for the pair of cross-duct sensors Siemens AP 01 · 2015 2/37 © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer Purging 2 The easiest way to avoid condensation and dust deposits on the sensor windows or excessively high thermal load of the windows and the sealing material as well as the sensor electronics is to purge them (with O2 application: nitrogen). Purging must be selected depending on the application. The transmitted-light sensors can therefore be configured for the respective situation. The application reference table provides recommendations for suitable purging for the standard applications. If oxygen is to be measured with the SITRANS SL - which is also present in measurable quantities in the ambient air - oxygen-free purging gases must be used, such as nitrogen. It is equally necessary to purge the inside of the sensor heads, since the ambient air must also be displaced here out of the laser beam path. A differentiation is therefore made between purging on the process side and purging on the sensor side. Input for purging on the process side Optics tube (transmitter or receiver) Output for purging on the sensor side Process flange Purging tube Flange connection plate (process interface) Input for purging on the sensor side Arrangement for purging on the sensor side of the SITRANS SL Purging on process side For purging on the process side, the flow of purging gas can be adjusted between 0 and approx. 50 l/min at each sensor head using a needle valve (included in delivery). Purging on sensor side This can be combined with the purging on the process side, if required. Purging with nitrogen on the sensor side is almost always necessary for O2 applications to avoid an offset caused by the oxygen of the air present in the unit. The cells in the sensor head are then continuously purged with nitrogen. Particularly when (re)starting the SITRANS SL O2, a sufficiently high flow of purging gas of approx. 3 to 5 l/min must be provided for several minutes to ensure that all residues of oxygen are removed. The flow of sensor purging gas can subsequently be set to a lower value using the needle valve (included in delivery). Note: With purging on the process side, it may be necessary to use non-return valves to ensure no process gas can enter the purging gas line in the event of failure of the purging gas supply. This applies especially in the case of cascaded process and sensor purging where there is otherwise the danger that, for example, corrosive process gases could enter the sensor enclosure. 2/38 Siemens AP 01 · 2015 Sensor head (transmitter or receiver) © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer Purging tubes The purging media used on the process side flow through purging tubes into the process gas stream. The tubes extend into the process area by a few centimeters, usually perpendicular to the process gas stream. This means that an exactly defined optical path length is defined through the sample gas. The effective measuring path in the process gas is therefore defined as the distance between the ends of the two purging tubes. The standard length of the purging tubes is 340 mm. To enable sufficient alignment, the process wall should be max. 150 mm thick. 2 Optical path length Process wall Purging tube Measurement of the optical path length between the ends of the purging gas tubes Maintenance and fault messages Note The SITRANS SL carries out continuous self-monitoring, and outputs alarms and warnings to indicate maintenance requirements or a system fault. The information is output as plain text on the LUI display, where symbols identify the category and the severity of the fault. Specific requirements for the measuring point can make the utilization of special sensor equipment necessary. The possibilities for adapting the sensors are: • Special materials for purging tubes (on request) • Various types/sizes of sensor flanges • Explosion-protected sensor configurations Alarm categories: • Maintenance (system must be cleaned or repaired) • Process value (problem with external sensor, or process conditions outside the permissible range for SITRANS SL) • Configuration (SITRANS SL is not correctly configured) Severity: • Fault (measurements could not be carried out) • Warning (measurements may be inaccurate, or the system will soon shut down measuring mode if an intervention is not made) • Advanced warning/information (measurements are carried out) The two binary (relay) outputs can be configured freely for the alarm output. The response of the analog outputs in the event of an alarm is configurable; possible actions are: • Off (current measured value is displayed) • Last measured value (freezing of last value displayed) • Standard level (setting to predefined value) • 3 mA (NAMUR NE43 fault status) Essential characteristics • Long-term stabilization through use of an internal reference cell; calibration interval at least one year • Dynamic background correction for varying dust loads • Isolated signal outputs of 4 to 20 mA • User-friendly, menu-driven operation • Selectable time constants (response time) • Password-protected user interface • I/O operation in accordance with NAMUR recommendations • Monitoring of overall optical transmission • Sensor enclosure resistant to wear and corrosion • Simple local operation using remote-control unit with numeric keypad and menu prompting In addition, the transmission is available as an output variable. Siemens AP 01 · 2015 2/39 © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer Standard applications The following table lists the measuring conditions for standard applications. The listed values for the measuring range and detection limit are only approximate values. The exact values at the respective measuring point depend on the totality of all influencing variables and can be determined by Siemens for the specific case. Please note that the values for the detection limit and the 2 Standard application Effective optical path length: 0.3 … 8 m Dust load2): < 50 g/Nm3 maximum measuring range refer to a path length of 1 m. Longer path lengths will improve the detection limit, but not linearly. due to limiting effects such as dust load. The maximum applicable measuring ranges can only be used if permitted by the process conditions such as dust load. Process gas Process gas temperature pressure Tmin … Tmax pmin … pmax Min. measuring range (with 1 m eff. opt. path length) Max. measuring range (also dependent on eff. opt. path length: see following column) Max. measuring range x path length DL x path Repeata- Purging length bility3) gas (under medium standard conditions1) without cross-interference of other gases) Sample gas component Gas Appl. code code O2 A B 0 … 600 °C 900 ... 1 100 hPa 0 … 1 vol% 0 … 100 vol% 75 vol%*m 200 ppmv*m 2% N2 O2 A C 0 … 200 °C 700 … 5 000 hPa 0 … 1 vol% 0 … 100 vol% 75 vol%*m 200 ppmv*m 2% N2 CO J C -20 … 700 °C 700 ... 2 000 hPa, 0 … 100 ppmv 0 … 6 000 ppmv 2 000 ppmv*m 0.6 ppmv*m4) 2 % max. 300 °C 800 ... 1 200 hPa, above 300 °C Air, N2 Reference table: Standard applications. The specified pressures are absolute. DL = detection limit 1) At 20 °C, 1 013 hPa, without dust 2) With 0.3 m effective optical path length Average diameter of the dust particles: 15 µm Specific weight of the dust particles: 650 kg/m3 The influence of dust load is extremely complex, and depends on the path length and particle size. The optical attenuation increases exponentially at longer path lengths. Smaller particles also have a very large influence on the optical attenuation. With high dust load, long path length and small particle size, the technical support at Siemens should be consulted. 3) Referred to measuring range. With stable or externally measured and software-compensated process gas temperature and pressure conditions. 4) The measurement of CO can be significantly affected by hydrocarbons, such as CH4. Ensure there is no CH4 in the process or contact Siemens and describe the process conditions using the provided application questionnaire (see below). Special applications In addition to the standard applications, special applications are available upon request. If the process conditions deviate from the specifications of the standard applications, special applications are also possible on request. Please complete the application questionnaire which can be found at www.siemens.com/insituquestionnaire on the Internet. 2/40 Siemens AP 01 · 2015 © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer ■ Technical specifications Analytical performance Design, enclosure Measuring range Internally adjustable Degree of protection IP65 according to EN 60529 Detection limit at standardized conditions: 25 °C gas temperature, 1 000 hPa, 1 m effective optical path length, 3 s integration time and constant ambient conditions. O2: 200 ppmv CO: 0.6 ppmv Dimensions For each unit (transmitter, detector) • Diameter: 165 mm • Length: 357 mm Purging tube Linearity (under standard conditions) Better than 1 % Length, outer diameter, inner diameter: 340, 48, 44 mm Repeatability (under standard conditions) O2: 1 % of the measuring range CO: 0.5 % of the measuring range Weights General information Design Transmitter and detector units, connected by a sensor cable Materials • Sensor enclosure: treated aluminium/stainless steel (1.4305/303) • Process interface: acid-resistant stainless steel (1.4404/316L) • Window: hardened borosilicate glass • Compressible gaskets: FKM, FFKM, EPDM (holder for reference cell) • Flat gaskets: Graphite Parts wetted by the process gases • Purging tubes, flanges, window ring, process purging: acid-resistant stainless steel • Window: Borosilicate • Gasket in window: FFKM • Flat gasket between customer flange and process flange: Graphite Installation In-situ or bypass Concentration units ppm, vol. %, mg/Nm3 Display Digital concentration display (4 digits with floating decimal point) Laser protection class Class 1, safe to the eye Explosion protection Optionally, according to • ATEX II 2G Ex de op is IIC T6 ATEX II 2D Ex tD A21 IP65 T85 °C • FM Class I, II, III Div 1 Groups A, B, C, D, E, F, G T6 FM Class I, Zn 1, AEx d IIC T6 FM Class II, Zn 21, AEx td T85 °C • XP Class I, II, III Div 1 Groups C, D T6 Ta = 55 °C; DIP Class II,III Div 1 Groups E, F, G T6 Ta = 55 °C; Class I, Zn 1, Ex d IIC T6 Ta =55 °C; Zn 21, Ex tD T85 °C Ta = 55 °C • Detector unit 6.0 kg • Transmitter unit 5.2 kg • Process interface - for DN 50/PN 25 5.3 kg - for ANSI4’’/150 lbs Approx. 12 kg Connection dimension customer flange DN 50/PN 25, DN 50/PN 40 or ANSI 4"/150 lbs Electrical characteristics Power supply 24 V DC nominal (18 ... 30.2 V DC) Power consumption, maximum 10 VA EMC In accordance with EN 61326-1 Electrical safety In accordance with EN 61010-1 Fuse specifications T1.6L250V Dynamic performance Warm-up time at 20 °C ambient temperature Approx. 15 min Response time (T90) Approx. 2 s, depends on application Integration time 0 ... 100 s, selectable Influencing variables Variations in ambient temperature < 0.5 %/10 K of the measuring range Process gas temperature With compensation: < 1 %/100 K of the measuring range Variations in atmospheric pressure Negligible Process gas pressure O2: With compensation: < 1 %/4 000 hPa of the measuring range CO: Negligible Variations in supply voltage Negligible Siemens AP 01 · 2015 2/41 2 © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer Electrical inputs and outputs 2 Measuring conditions Number of measurement channels 1 Analog outputs 2 outputs, 4 ... 20 mA, floating, ohmic resistance max. 660 Ω. External isolating power supplies may have to be provided by the customer. Analog inputs 2 inputs, designed for 4 ... 20 mA, 120 Ω Digital outputs 2 outputs, with switchover contacts, configurable, 24 V/0.5 A, floating, single pole double throw (SPDT) Measurement path 0.3 ... 8 m (other lengths: please contact Siemens) Process gas pressure, temperature • O2: 900 ... 1 100 hPa, 0 … 600 °C • O2: 700 … 5 000 hPa, 0 … 200 °C • CO: 700 … 2 000 hPa, -20 … 300 °C • CO: 800 … 1 200 hPa, 300 … 700 °C Dust load The influence of a high dust load is complex, and depends on the optical path length and particle size distribution. Digital input 1 input, designed for 24 V, floating, configurable Service port Ethernet 10BaseT (RJ-45) Purging RS 485 PROFIBUS DPV0 version Two-wire interface, up to 3 Mbit/s, -7 … 12 V Purging gas RS 485 Modbus version Two-wire interface, up to 115 200 bit/s, -7 … 12 V • Nitrogen (for O2 and CO applications) • Instrument air (for CO applications) • Quality O2 application: Purity better than 99.7 % in order to achieve full performance. For oxygen measurements, an O2 content < 0.01 vol. % in the purging gas is recommended. < -10 °C, condensation on the optics must be avoided Cable to customer interface (not included in standard delivery, permanently installed for ATEX, optionally available for Standard) Analog connection cable (with ATEX configuration: only supplied cables may be used!) 10 x 2, with shielding in twistedpair configuration (depending on type and number of I/Os used) PROFIBUS DP connection cable (with ATEX configuration: only supplied cables may be used!) 1 x 2 + 4 (PROFIBUS DP hybrid cable) • Dew point Modbus connection cable (with ATEX configuration: only supplied cables may be used!) 1 x 2 + 3, with shielding in twisted-pair configuration • Max. overpressure in the sensor 500 hPa 0 ... +55 °C Cable length for ATEX configuration 3m • Purging gas temperature on sensor side Conductor cross-section Min. 0.34 mm² • Flow Cable diameter 8 ... 12 mm or 13 ... 18 mm Minimum bending radius ATEX-PROFIBUS 110 mm O2 application: When commissioning a sensor enclosure previously filled with air: 3 ... 5 l/min (for at least 15 min), subsequently: at least 0.25 l/min Sensor purging Sensor cable (not included in standard delivery, permanently installed for ATEX, optionally available for Standard) Purging on the process side (optional) Sensor cable type configuration • Pressure at purging gas inlet 2 000 ... 8 000 hPa • Flow Dependent on process gas pressure, process gas velocity, dust load, moisture, etc. up to max. 50 l/min 4 x 2, with shielding, in twisted-pair configuration Conductor cross-section Min. 0.34 mm² Cable sheath PUR (polyurethane) Dimensions • Diameter: 11 mm • Length: up to 25 m Minimum bending radius ATEX: 85 mm Climatic conditions Ambient temperature range • -20 ... +55 °C during operation (additional solar radiation not permissible!) • -40 ... +70 °C during transport and storage Temperature range on the sensor side of the process interface (connection plate) -20 ... +70 °C Atmospheric pressure 800 ... 1100 hPa (for ATEX and FM version) Humidity < 100 % rel. humidity 2/42 Siemens AP 01 · 2015 © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer ■ Accessories SITRANS SL sensor alignment kit Calibration test kit The SITRANS SL sensor alignment kit includes a battery-operated lamp, a centering aid with crosshair, and two hook spanners for loosening the sensors from the flange connection plates. The SITRANS SL has already been factory-calibrated. If it is desirable or necessary to check the calibration, this can be performed using an external calibration test kit following removal of the transmitter and detector units. This procedure has no influence on the optical adjustment of the unit since the flange connection plates remain mounted on the customer flange. The calibration test kit for O2 consists of a stainless steel calibration tube and a thermometer. To carry out the calibration, it is mounted between the transmitter and receiver. The calibration tube for O2 can then be filled with air or a calibration gas. Please note: The SITRANS SL sensor alignment kit is not explosion-protected! Therefore it must never be used in a hazardous area without approval by the plant operator! Thermometer Transmitter Calibration tube for O2 Receiver Needle valves ATEX adapter cable Calibration validation setup of SITRANS SL O2 Siemens AP 01 · 2015 2/43 2 © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer ■ Dimensional drawings Note the SITRANS SL sensors must be accessible from the side. A space of at least 60 cm must be provided next to the SITRANS SL transmitter and detector units in order to facilitate maintenance and servicing. To fulfill the safety requirements, a clearance of at least 10 cm must be provided around the SITRANS SL to maintain cooling. Process purging input /RRSFDEOHMXQFWLRQER[ $7(;YHUVLRQRUDVDQRSWLRQ 112 Process interface Purging tube 163 Process flange 2° Sensor purging input 340 357 SITRANS SL, transmitter/detector unit (same housing for DN 50/PN 25 process interface version), dimensions in mm 2/44 Siemens AP 01 · 2015 Ø 9" Ø 7½" Ø 125 mm Connection dimensions of process flanges provided by customer DN 50/PN 25 and ANSI 4’’/150 lbs Ø 4" Ø 3/4" (for 5/8” screwed gland) Ø 18 mm (for M16 screwed gland) Ø 50 mm 2 © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer ■ Schematics Electrical connections Non-EEx version: connection cable - customer interface Terminal block in the receiver enclosure Function/voltage 1 + 2 - Power supply 19 … 30.2 V, 10 VA1) 3 Normally closed under power4) Binary output 0 (relay) 30 V, 0.5 A3) Normally closed under power4) Binary output 1 (relay) 30 V, 0.5 A3) 7 + 8 - Binary input 0 0 … 30 V2) 9 + 10 - 11 + 12 - 13 PROFIBUS A line (RxD/TxD_N - data inverted) 14 PROFIBUS B line Modbus D0 (RxD/TxD_P - data not inverted) (RxD/TxD_P - data not inverted) 15 PROFIBUS/Modbus shield 16 T x+ 17 T x- Orange 18 Rx+ White/green 19 Rx- Green 20 + 21 - 22 + 23 - 4 5 6 Ethernet cable 2 Analog output 0 (measurement) 30 V, 24 mA3) Analog output 1 (measurement) 30 V, 24 mA3) Modbus D1 (RxD/TxD_N - data inverted) RS 485 (PROFIBUS/Modbus) -7 ... +12 V DC Ethernet5) White/orange Analog input 0 (temperature) 0 … 30 mA2), 120 Ω Analog input 1 (pressure) 0 … 30 mA2), 120 Ω 24 Grounding 25 Grounding Ground Grounding Ground Grounding Shielding 1) This is the maximum power consumption of the SITRANS SL 2) These are the maximum input values 3) These are the maximum output values 4) Note: "Normal operation" stands for normal operation of the analyzer. The system is connected to the voltage source and is running without problems; no error message generated or displayed. "Normal under power" refers to the status of the relay under the above-named normal operation. The relay contact of the alarm signal is closed. 5) We recommend that the Ethernet connection is not made via the cable to the Ethernet terminals in the detector unit. Instead, the Ethernet connection should be made via the sensor cable connection set which is optionally available for the detector unit. Siemens AP 01 · 2015 2/45 © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer Examples of digital output and analog output Terminal strip in terminal box Function Color code 1 + - 24 V DC voltage supply for transmitter unit Red 2 3 Com + Communication with transmitter Pink 4 Com - Gray 5 Sync + Synchronization with transmitter White 6 Sync - Brown 7 NC Not used - 8 Tx+ Ethernet Gray/pink 9 Tx- Red/blue V0 can be up to 30 V 10 Rx+ Black Rload must be at least 60 Ω (max. 0.5 mA in relay) 11 Rx- PE terminal - > SITRANS SL Customer side < Imeas 3 V0 2 Rload 4 Example of digital output 0 Customer side < Imeas V0 Rload > SITRANS SL 9 10 V0 must be min 7.5 and max 30 V Rload can be maximum V0 - 7.5 Ω 0.025 Example of analog output 0 Caution: Please note that an external isolating power supply may be required! 2/46 Sensor cable terminal box on the receiver side (ATEX version) Siemens AP 01 · 2015 Blue Violet Grounding Green PE terminal Grounding Yellow Gland Grounding Shielding © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer Selection and ordering data Article No. SITRANS SL in-situ gas analyzer 7MB6221- 7 7 7 7 7 - 7 7 7 7 Cannot be combined Click on the Article No. for the online configuration in the PIA Life Cycle Portal. Explosion protection Without Ex II 2 G Ex de op is IIC T6 Ex II 2 D Ex tD A21 IP65 T85°C FM USA: XP Class I, II, III Div 1 Groups A, B, C, D T6 Ta = 55°C DIP Class II,III DIV 1 Group EFG Ta = 55°C Class I, Zn 1, AEx d IIC T6 Ta = 55°C Zn 21, AEx tD T85°C Ta = 55°C FM Canada: XP Class I, II, III Div 1 Groups C, D T6 Ta = 55°C DIP Class II,III DIV 1 Group EFG Class I, Zn 1, Ex d IIC T6 Ta =55°C Class II, III Zn 21, Ex t IIIC T85°C Ta = 55°C Measured component O2 CO 0 1 0 1 2 2 2 2 A J Application examples1) Control of combustion processes Process control, safety monitoring in appropriate plant concepts Communication interface Analog PROFIBUS DP Modbus A J B C B B 0 1 2 Purging tubes, material No purging tubes Stainless steel Length Purging mode, process side Sensor side No purging No purging No purging 3 ... 5 l/min 0 1 0 ... 50 l/min 0 ... 50 l/min No purging 3 ... 5 l/min 2 3 340 mm 0 1 0 1 2 Process interface 2) Connection dimension ANSI 4" 150 lbs (EN 1.4404/316L), MAWP (PS) @ 20 °C: 232 psi B Connection dimension DN 50/PN 25 (EN 1.4404/316L), MAWP (PS) @ 20°C: 2.5 MPa C Connection dimension DN 50/PN 40 (EN 1.4404/316L), MAWP (PS) @ 20°C: 4.0 MPa E E Sensor cable 5m 10 m 25 m with brass cable gland with brass cable gland with brass cable gland A B C A B C A B C 5m 10 m 25 m with stainless steel cable gland with stainless steel cable gland with stainless steel cable gland D E F D E F D E F Without cable Documentation language German English French Spanish Italian X X 0 1 2 3 4 1) The examples shown represent possible applications where appropriately configured SITRANS SL solutions can be used. The user is responsible for the prevailing conditions (plant concept (possibly redundant), application of appropriate components required in addition, compliance with possible directives, etc.). 2) MAWP: Maximum Allowable Working Pressure Siemens AP 01 · 2015 2/47 © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL In-situ O2 and CO gas analyzer 2 Selection and ordering data Additional versions Add "-Z" to Article No. and specify Order code Acceptance test certificate 3.1 (leak test) in accordance with EN 10204 Acceptance test certificate 3.1 (material certificate) in accordance with EN 10204 SIL 1 conformity declaration in accordance with standards IEC 61508/IEC 61511 (for the measured component oxygen in combination with analog interfaces) TAG label, customized inscription 1) Order code C12 1) C13 1) C20 1) Y30 Together with explosion protection as per FM, on request Selection and ordering data Additional units Calibration verification kit O2, SITRANS SL Calibration verification kit CO, SITRANS SL SITRANS SL sensor alignment kit Ex-e junction box for 25-wire cable Cable set analog (for non-Ex SITRANS SL) Cable set PROFIBUS DP (for non-Ex SITRANS SL) UV protective hose for outdoor use, ND = 48 mm, per 30 m Sensor connecting cable set • 25 m • 10 m •5m Spare parts Process interface DN 50 PN 10 ... 40 incl. gasket Gasket DN 50/PN 10 ... 40 Process interface ANSI 4" Class 150 incl. gasket Gasket ANSI 4" Class 150 Purging tube 340 mm incl. gasket for DN 50/PN 10 ... 40 Window lid for receiver housing Lid for transmitter housing Cable, analog, brass, EX Cable, analog, VA, EX Cable, PROFIBUS, brass, EX Cable, PROFIBUS, VA, EX Cable, transmitter, VA, EX Junction box, transmitter, VA, EX Junction box, transmitter, brass, EX Cabeling, transmitter, brass, EX Interconnection cable 5 m Interconnection cable 10 m Interconnection cable 25 m Cable, receiver, VA, EX Junction box, receiver, VA, EX Cabeling, receiver, brass, EX Cable gland kit, non-EX Clamp ring Light source with adapter LUI Remote control IS, CSA, FM, ATEX Needle valve kit Capillary kit 2/48 Siemens AP 01 · 2015 Article No. Item number (see figure on the next page) A5E01000694 A5E03090938002 A5E01000740 A5E01267567 A5E03328474 A5E03328473 A5E01714061 A5E02528052 A5E02528048 A5E02509347 3+4+5 3+4+5 3+4+5 A5E01009881 A5E02522036 A5E01009883 A5E02789535 A5E01009892 A5E01009897 A5E02568437 A5E02608597 A5E34834297 A5E02608594 A5E34834296 A5E34830928 A5E34831075 A5E02091532 A5E02568463 A5E02571180 A5E02571184 A5E02571186 A5E34831050 A5E34831078 A5E02568465 A5E02568457 A5E01010033 A5E33259745 A5E31503119 A5E02091214 A5E02569944 A5E02183375 6 6 6 6 2 1 1 1+2 5 5 5 4 3 3+4 © Siemens AG 2015 Continuous Gas Analyzers, in-situ SITRANS SL Documentation ■ Selection and ordering data Manual Article No. SITRANS SL manual • German A5E01132949 • English A5E01132948 • French A5E01132951 • Italian A5E01132952 • Spanish A5E01132953 2 ] X Z Y \ [ SITRANS SL spare parts, item numbers Siemens AP 01 · 2015 2/49