Continuous Gas Analyzers, extractive OXYMAT 61

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1 Siemens AG 06 OXYMAT 6 Overview The measuring principle of the OXYMAT 6 gas analyzers is based on the paramagnetic alternating pressure method and is used to measure oxygen in gases in standard applications. Benefits Integrated pump for reference gas (option, e.g. ambient air) High linearity Compact design Physically suppressed zero possible Application Application areas Environmental protection Boiler control in firing systems Quality monitoring (e.g. in ultra-pure gases) Process exhaust monitoring Process optimization Further applications Chemical plants Gas manufacturers Research and development General information Design 9" rack unit with HU for installation - in hinged frame - in cabinets with or without telescope rails Front plate can be swung down for servicing purposes (laptop connection) Gas connections for sample gas inlet and outlet; pipe diameter 6 mm or ¼" Gas and electrical connections at the rear Display and control panel Large LCD field for simultaneous display of: - Measured value -Status bar - Measuring ranges Contrast of LCD panel adjustable using menu Permanent LED backlighting Washable membrane keyboard with five softkeys Menu-driven operation for parameterization, test functions, adjustment User help in plain text Graphic display of concentration trend; programmable time intervals Bilingual operating software German/English, English/ Spanish, French/English, Spanish/English, Italian/English Input and outputs One analog output per medium (from 0,, to 0 ma; NAMUR parameterizable) Six binary inputs freely configurable (e.g. for measurement range switchover, processing of external signals from sample preparation) Six relay outputs freely configurable (failure, maintenance request, maintenance switch, threshold alarm, external magnetic valves) Two analog inputs configurable (e.g. correction of cross-interference, external pressure sensor) Extension with eight additional binary inputs and eight additional relay outputs, e.g. for autocalibration with up to four calibration gases Communication RS 85 present in basic unit (connection from the rear). Options RS 85/RS 3 converter RS 85/Ethernet converter RS 85/USB converter Connection to networks via PROFIBUS DP/PA interface SIPROM GA software as service and maintenance tool Siemens AP 0 06 /53

2 Siemens AG 06 OXYMAT 6 General information LED backlit graphic display and membrane keyboard with noticeable click Status line to display the analyzer status (programmable) Two code levels according to NAMUR (maintenance and specialist level) Easy operation menu controlusing the softkeys Display of concentrations as numbers and bargraph Display of start-of-scale and full-scale values Display of current measuring ranges Keyboard to enter values ESC key to abort inputs INFO key for help in plain text CLEAR key to delete inputs ENTER key to accept input values MEAS key to return to measurement mode OXYMAT 6, membrane keyboard and graphic display Designs Parts touched by sample gas, standard Gas path 9" rack unit With hoses Bushing Stainless steel, mat. no..57 Hose FKM (Viton) Sample chamber Stainless steel, mat. no..57 Fittings for sample chamber Stainless steel, mat. no..57 Restrictor PTFE (Teflon) O-rings FKM (Viton) Hose coupling Polyamide 6 Options Flow indicator Pressure switch Measurement pipe Variable area Suspension boundary Angle pieces Membrane Enclosure Duran glass Duran glass, black PTFE (Teflon) FKM (Viton) FKM (Viton) PA 6.3 T /5 Siemens AP 0 06

3 Siemens AG 06 OXYMAT 6 General information Gas path Legend for the gas path figures Sample gas inlet 9 Purging gas Sample gas outlet 0 Restrictor in reference gas path (outlet) 3 Not used Pressure switch for reference gas monitoring Reference gas inlet Pump 5 Restrictor in reference gas path 3 Filter 6 O physical system Flow indicator in sample gas path (option) 7 Restrictor in sample gas path 5 Pressure sensor 8 Pressure switch in sample gas path (option) F 7 P P 3 9 Gas path OXYMAT 6 with integrated reference gas pump (connection for 00 hpa, absolute) F 7 P Gas path OXYMAT 6 with reference gas connection to hpa, absolute Siemens AP 0 06 /55

4 Siemens AG 06 OXYMAT 6 General information Function In contrast to almost all other gases, oxygen is paramagnetic. This property is utilized as the measuring principle by the OXYMAT 6 gas analyzers. Oxygen molecules in an inhomogeneous magnetic field are drawn in the direction of increased field strength due to their paramagnetism. When two gases with different oxygen contents meet in a magnetic field, a pressure difference is produced between them. In the case of OXYMAT 6, one gas () is a reference gas (N, O or air), the other is the sample gas (5). The reference gas is introduced into the sample chamber (6) through two channels (3). One of these reference gas streams meets the sample gas within the area of a magnetic field (7). Because the two channels are connected, the pressure, which is proportional to the oxygen content, causes a cross flow. This flow is converted into an electric signal by a microflow sensor (). OXYMAT 6, principle of operation The microflow sensor consists of two nickel-plated grids heated to approximately 0 ºC, which, along with two supplementary resistors, form a Wheatstone bridge. The pulsating flow results in a change in the resistance of the Ni grids. This leads to an offset in the bridge which is dependent on the oxygen concentration of the sample gas. Because the microflow sensor is located in the reference gas stream, the measurement is not influenced by the thermal conductivity, the specific heat or the internal friction of the sample gas. This also provides a high degree of corrosion resistance because the microflow sensor is not exposed to the direct influence of the sample gas. By using a magnetic field with alternating strength (8), the effect of the background flow in the microflow sensor is not detected, and the measurement is thus independent of the instrument s operating position. The sample chamber is directly in the sample path and has a small volume, and the microflow sensor is a low-lag sensor. This results in a very short response time for the OXYMAT 6. Note The sample gases must be fed into the analyzers free of dust. Condensation should be prevented from occurring in the sample chambers. Therefore, gas modified for the measuring tasks is necessary in most application cases. Essential characteristics Four freely parameterizable measuring ranges, also with suppressed zero point, all measuring ranges linear Galvanically isolated measured-value output 0// to 0 ma (also inverted) Autoranging possible; remote switching is also possible Storage of measured values possible during adjustments Wide range of selectable time constants (static/dynamic noise suppression); i.e. the response time of the device can be adapted to the respective measuring task Easy handling thanks to menu-driven operation Low long-term drift Two control levels with their own authorization codes for the prevention of accidental and unauthorized operator interventions Automatic, parameterizable measuring range calibration Operation based on the NAMUR recommendation Monitoring of sample gas (option) OXYMAT 6, principle of operation 9 Reference gas inlet Restrictors 3 Reference gas channels Microflow sensor for measurement 5 Sample gas inlet 6 Sample cell 7 Paramagnetic effect 8 Electromagnet with alternating field strength 9 Sample gas and reference gas outlet 3 6 Customer-specific analyzer options such as: - Customer acceptance -TAG labels - Drift recording Simple handling using a numerical membrane keyboard and operator prompting Short response time Reference gas supply either externally (N, O or air, approx hpa) or via built-in reference gas pump (ambient air, approx. 00 hpa abs.) Monitoring of reference gas with reference gas connection; only on version with built-in reference gas pump Different smallest measuring ranges, depending on version.0 % or 5.0 % O Internal pressure sensor for correction of fluctuations in the sample gas pressure DP O O O O O /56 Siemens AP 0 06

5 Siemens AG Correction of zero error / cross-sensitivities Accompanying gas Deviation from zero point (concentration 00 vol.%) in vol. % O absolute Organic gases Ethane C H Ethene (ethylene) C H -0. Ethine (acetylene) C H butadiene C H butadiene C H n-butane C H iso-butane C H butene C H iso-butene C H Dichlorodifluoromethane (R) CCl F Acetic acid CH 3 COOH -0.6 n-heptane C 7 H n-hexane C 6 H -.0 Cyclo-hexane C 6 H -.8 Methane CH -0.8 Methanol CH 3 OH -0.3 n-octane C 8 H n-pentane C 5 H -.68 iso-pentane C 5 H -.9 Propane C 3 H Propylene C 3 H Trichlorofluoromethane (R) -.63 CCl 3 F Vinyl chloride C H 3 Cl Vinyl fluoride C H 3 F vinylidene chloride C H Cl -. OXYMAT 6 General information Accompanying gas (concentration 00 vol.%) Deviation from zero point in vol. % O absolute Inert gases Helium He Neon Ne +0.7 Argon Ar -0.5 Krypton Kr Xenon Xe -.05 Inorganic gases Ammonia NH Hydrogen bromide HBr Chlorine Cl -0.9 Hydrogen chloride HCl Dinitrogen monoxide N O -0.3 Hydrogen fluoride HF +0.0 Hydrogen iodide HI -.9 Carbon dioxide CO Carbon monoxide CO Nitrogen oxide NO +.9 Nitrogen N 0.00 Nitrogen dioxide NO Sulfur dioxide SO -0.0 Sulfur hexafluoride SF Hydrogen sulfide H S -0. Water H O Hydrogen H +0.6 Table : Zero error due to diamagnetism or paramagnetism of some accompanying gases with nitrogen as the reference gas at 60 C and 000 hpa absolute (according to IEC 07/3) Conversion to other temperatures: The deviations from the zero point listed in Table must be multiplied by a correction factor (k): with diamagnetic gases: k = 333 K / ( [ C] + 73 K) with paramagnetic gases: k = [333 K / ( [ C] + 73 K)] (all diamagnetic gases have a negative deviationfrom zero point) Reference gases Measuring range Recommended reference gas Reference gas connection pressure Remarks 0 to vol.% O... to 00 vol.% O (suppressed N O hpa above sample gas pressure (max hpa absolute) zero point with full-scale value 00 vol.% O ) Around vol.% O (suppressed Air Atmospheric pressure with internal zero point with vol.% O within reference gas pump the measuring span) The reference gas flow is set automatically to 5 0 ml/min Siemens AP 0 06 /57

6 Siemens AG 06 OXYMAT 6 9" rack unit Technical specifications General information Measuring ranges Smallest possible span (relating to sample gas pressure 000 hpa absolute, 0.5 l/min sample gas flow and 5 C ambient temperature) Largest possible measuring span 00 vol. % O Measuring ranges with suppressed zero point Operating position Conformity, internally and externally switchable; autoranging is also possible vol.% or 5vol.% O Any zero point within vol.% can be implemented, provided that a suitable reference gas is used Front wall, vertical CE mark in accordance with EN 5008-, EN Design, enclosure Degree of protection IP0 according to EN 6059 Weight Approx. 3 kg Electrical characteristics Power supply 00 0 V AC (nominal range of use 90 3 V), 8 63 Hz or 00 0 V AC (nominal range of use 80 6 V), 8 63 Hz Power consumption Approx. 5 VA EMC (Electromagnetic Compatibility) In accordance with standard requirements of NAMUR NE (08/98) Electrical safety According to EN 600-, overvoltage category III Fuse values V:.0 T/ V: 0.63 T/50 Gas inlet conditions Permissible sample gas pressure External reference gas supply hpa absolute With integrated pump Atmospheric pressure 50 hpa Sample gas flow 8 60 l/h (0.3 l/min) Sample gas temperature Min. 0 to max. 50 C, but above the dew point Sample gas humidity < 90 % relative humidity Reference gas pressure (high-pressure version) Reference gas pressure (low-pressure version) with external pump Dynamic response Warm-up period Delayed display (T 90 ) Damping (electrical time constant) Dead time (purging time of the gas path in the unit at l/min) Time for device-internal signal processing Pressure correction range Pressure sensor internal hpa above sample gas pressure, but max hpa absolute (version without reference gas pump) Min. 00 hpa above sample gas pressure At room temperature < 30 min (the technical specification will be met after hours) 3.5 s 0 00 s, parameterizable Approximately s, depending on version <s hpa, absolute (see gas inlet conditions for permissible sample gas pressure) Measuring response (relating to sample gas pressure 03 hpa absolute, 0.5 l/min sample gas flow and 5 C ambient temperature) Output signal fluctuation < 0.75 % of the smallest possible measuring range according to rating plate, with electronic damping constant of s (corresponds to 0.5 % at ) Zero point drift < 0.5 %/month of the smallest possible span according to rating plate Measured-value drift < 0.5 %/month of the current measuring range Repeatability < % of the current measuring range Detection limit % of the current measuring range Linearity error < % of the current measuring range Influencing variable (relating to sample gas pressure 03 hpa absolute, 0.5 l/min sample gas flow and 5 C ambient temperature) Ambient temperature < %/0 K with span 5 % Sample gas pressure (with air (00 hpa) as internal reference gas supply, correction of the atmospheric pressure fluctuations is only possible if the sample gas can vent to ambient air.) Accompanying gases Sample gas flow at zero point Power supply Electrical inputs and outputs Analog output Relay outputs Analog inputs Binary inputs When pressure compensation has been switched off: < % of the current measuring range/ % pressure change When pressure compensation has been switched on: < 0. % of the current measuring range/ % pressure change Deviation from zero point corresponding to paramagnetic or diamagnetic deviation of accompanying gas (see table) < % of the current measuring range according to rating plate with a change in flow of 0. l/min within the permissible flow range < 0. % of the current measuring range with rated voltage 0 % 0// 0 ma, isolated; max. load 750 6, with changeover contacts, freely parameterizable, e.g. for measuring range identification; load: V AC/DC/ A, potentialfree, dimensioned for 0// 0 ma for external pressure sensor and accompanying gas influence correction (correction of cross-interference) 6, designed for V, isolated, freely parameterizable, e.g. for measuring range switchover Serial interface RS 85 Options AUTOCAL function with 8 additional binary inputs and relay outputs, also with PROFIBUS PA or PROFIBUS DP Climatic conditions Permissible ambient temperature C during storage and transportation 5 5 C during operation Permissible humidity < 90 % relative humidity as annual average, during storage and transportation (must not fall below dew point) /58 Siemens AP 0 06

7 Siemens AG 06 OXYMAT 6 Selection and ordering data Article No. OXYMAT 6 gas analyzer 7MB00-77A " rack unit for installation in cabinets Click on the Article No. for the online configuration in the PIA Life Cycle Portal. Gas connections for sample gas and reference gas Pipe with 6 mm outer diameter 0 Pipe with ¼" outer diameter 9" rack unit Cannot be combined Smallest possible measuring span O % Reference gas pressure hpa C % reference gas supply with internal pump D D Y0 5 % Reference gas pressure hpa E 5 % reference gas supply with internal pump F F Y0 Power supply V AC, Hz V AC, Hz Sample gas monitoring Without A With (incl. flow indicator and pressure switch) D Add-on electronics Without A AUTOCAL function With 8 additional digital inputs/outputs B With serial interface for the automotive industry (AK) D With 8 additional digital inputs/outputs and PROFIBUS PA interface E With 8 additional digital inputs/outputs and PROFIBUS DP interface F Language German 0 English French Spanish 3 Italian Additional versions Order code Add "-Z" to Article No. and specify Order code Telescopic rails ( units) A3 TAG labels (specific lettering based on customer information) B03 Attenuation element for sample gas B0 Y0 SIL conformity declaration (SIL ) Functional Safety according to IEC 6508 and C0 IEC 65 Clean for O service (specially cleaned gas path) Y0 Measuring range indication in plain text, if different from the standard setting ) Y Accessories Article No. RS 85/Ethernet converter A5E RS 85/RS 3 converter C795-Z589-U RS 85/USB converter A5E AUTOCAL function each with 8 digital inputs/outputs C795-A380-D5 AUTOCAL function 8 digital inputs/outputs each and PROFIBUS PA A5E AUTOCAL function 8 digital inputs/outputs each and PROFIBUS DP A5E Set of Torx screwdrivers A5E3865 ) Standard setting: Measuring range : 0 to smallest measuring span Measuring range : 0 to 0 % Measuring range 3: 0 to 5 % Measuring range : 0 to 00 % Siemens AP 0 06 /59

8 Siemens AG 06 OXYMAT 6 9" rack unit Dimensional drawings s M OXYMAT 6, 9 unit, dimensions in mm /60 Siemens AP 0 06

9 Siemens AG 06 Schematics Pin assignment (electrical connections) OXYMAT 6 9" rack unit OXYMAT 6, 9 unit, pin assignment Siemens AP 0 06 /6

10 Siemens AG 06 OXYMAT 6 9" rack unit Pin assignment (electrical connections) Connector SUB-D 37F (option) M M GND NC NC Binary input -P Binary input 3-P Binary input -P Binary input -P Binary input 0-P Binary input 9-P Binary input 8-P Binary input 7-P Binary input 7 to -N Relay Relay 3 Relay Relay Relay 0 Relay 9 Relay 8 Relay 7 GND Isolated via optocoupler "0" = 0 V ( V) "" = V ( V) Contact load max. V/ A, AD/DC for shown relay contact position, the relay has zero current Connector SUB-D 9F-X90 PROFIBUS DP Optional Connector SUB-D 9M-X90 PROFIBUS PA DGND CNTR-N CNTR-P/direction control RxD/TxD-N (A) RxD/TxD-P (B) VP /+ 5 V PA-N(-) PA-P(+) OXYMAT 6, 9 unit, pin assignment of the AUTOCAL board and PROFIBUS connectors /6 Siemens AP 0 06

11 Siemens AG 06 Gas and electrical connections OXYMAT 6 9" rack unit Sample gas outlet Reference gas inlet Sample gas inlet 5-pin connector: Binary inputs and analog inputs/outputs 9-pin connector: RS 85 Purging gas inlet 9-pin interface connector (option): e.g. PROFIBUS Power supply and fuses Gas connections: stubs 6 mm or ¼" 5-pin connector: Binary inputs and relay outputs 37-pin connector: Binary inputs and relay outputs (option) OXYMAT 6, 9 unit, gas and electrical connections Documentation Docume ntation Documentation Selection and ordering data Operating instructions OXYMAT 6 Gas analyzer for measurement of oxygen German English French Spanish Italian Article No. A5E A5E A5E A5E A5E Siemens AP 0 06 /63

12 Siemens AG 06 OXYMAT 6 Suggestions for spare parts Selection and ordering data Description Quantity for years Quantity for 5years Article No. Analyzer unit Reference gas supply (pump, restrictor, pressure switch, hose) A5E00838 Set of gaskets for sample gas pump 5 A5E O-ring C7-Z00-A6 Pressure switch (sample gas) C7930-Z0-A Flowmeter C790-Z560-T Sample chamber Stainless steel, mat. no..57; non-flow-type compensation branch - C795-A377-B535 O-ring (measuring head) C79-Z00-A3 O ring (fitting) C7-Z00-A59 Measuring head (non-flow-type compensation branch) C795-A360-B55 Restrictor for sample gas path, hose C795-A380-C0 Reference gas path, 3000 hpa (set of parts) C795-A380-D58 Electronics Front plate with keyboard A5E Motherboard, with firmware: see spare parts list - Adapter plate, LCD/keyboard C795-A37-B605 Magnetic field connection plate - C795-A37-B606 LC display W7505-B500-B Connector filter - W750-E560-K Fuse 0.63 A/50 V (30 V version) 3 W7905-L00-T630.0 A/50 V (0 V version) 3 W7905-L0-T00 If the OXYMAT 6 was supplied with a specially cleaned gas path for high oxygen context ("Clean for O service"), please ensure that you specify this when ordering spare parts. This is the only way to guarantee that the gas path will continue to comply with the special requirements for this version. /6 Siemens AP 0 06