Continuous gas analysis ULTRAMAT 23 Supplement 2 for Operating Instructions C79000-G52xx- C216-03

Transcription

1 Continuous gas analysis ULTRAMAT 23 Supplement 2 for Operating Instructions C79000-G52xx- C Product Information Legal information Warning notice system This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are graded according to the degree of danger. DANGER indicates that death or severe personal injury will result if proper precautions are not taken. WARNING indicates that death or severe personal injury may result if proper precautions are not taken. CAUTION with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken. CAUTION without a safety alert symbol, indicates that property damage can result if proper precautions are not taken. NOTICE indicates that an unintended result or situation can occur if the corresponding information is not taken into account. If more than one degree of danger is present, the warning notice representing the highest degree of danger will be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property damage. Qualified Personnel The product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation for the specific task, in particular its warning notices and safety instructions. Qualified personnel are those who, based on their training and experience, are capable of identifying risks and avoiding potential hazards when working with these products/systems. Proper use of Siemens products Note the following: WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems. The permissible ambient conditions must be adhered to. The information in the relevant documentation must be observed. Siemens P2010 A5E , 12/2010 9

2 Introduction Device model and validity This supplement describes the ULTRAMAT 23 with a paramagnetic oxygen sensor. The supplement only covers the specific components of this ULTRAMAT 23 version. The standard operating instructions for the ULTRAMAT 23 (C79000-G52xx-C216) as of revision 03 should be read in any case to ensure safe operation of this device. This applies, above all, to the warnings and safety information provided there. Product information / technical updating Description Area of application The paramagnetic oxygen sensor is used to measure oxygen in dry gases free of particulates. Application areas include Flue gas analysis Inerting plants Room air monitoring Medical engineering Function Measuring principle In contrast to other gases, oxygen is highly paramagnetic. This property is used as the basis for the method of measurement. Figure 1 Measuring principle Two permanent magnets generate an inhomogeneous magnetic field in the measuring cell. If oxygen molecules flow into the measuring cell 1, they are drawn into the magnetic field. This results in the two diamagnetic hollow spheres 2 being displaced out of the magnetic field. This rotary motion is recorded optically, and serves as the input variable for control of a compensation flow. This generates a torque opposite to the rotary motion around the two hollow spheres by means of a wire loop 3. The compensation current is proportional to the concentration of oxygen. Siemens P A5E , 12/2010

3 Gas flow chart 1 Inlet for sample gas/calibration gas 10 Solenoid valve 2 Gas outlet 11 Sample gas pump 3 Inlet for zero gas or 12 Pressure switch inlet for sample gas/calibration gas (channel 2) 4 Gas outlet channel 2 13 Flow indicator 5 Enclosure flushing 14 Analyzer unit 6 Inlet for atmospheric pressure sensor 15 Safety condensation trap 7 Inlet for chopper compartment flushing 16 Paramagnetic oxygen sensor 9 Safety fine filter 17 Atmospheric pressure sensor ULTRAMAT 23, 19" rack-mounted enclosure with internal sample gas pump and paramagnetic oxygen measurement Technical data General information Measured components Measuring ranges Permissible ambient pressure Permissible operating temperature Maximum of 4, comprising up to 3 infrared-sensitive gases and an oxygen component 2 per component Min % vol O2 (limited accuracy) Max % vol O hpa C ( F) A5E , 12/

4 Influencing variables Cross-inferences (interfering gases) See table of cross-sensitivities Zero drift (% vol O2) Measuring range 2%: max. 0.1% with weekly zero adjustment Measuring range 5%: max. 0.1% with weekly zero adjustment Measuring range 25% or larger: max. 0.5% with monthly zero adjustment Temperature error (% vol O2) < 2 % /10 K referred to measuring range 5% < 5 % /10 K referred to measuring range 2% Humidity error (% vol O2) for N2 with 90% relative < 0.6 % at 50 C humidity after 30 min Air pressure < 0.2% of measured value per 1% pressure change Measuring response Display delay (T90 time) Output signal noise Reproducibility < 60 s < 1 % of smallest measuring range 1 % of smallest measuring range Cross-sensitivities All values in this table refer to a zero calibration with oxygen and a full-scale calibration with 100% vol. oxygen. The deviations apply to 100% vol. of the associated gas, and must be considered proportionally for the zero calibration. Gas Formula Deviation at 20 C Deviation at 50 C Acetyl aldehyde C2H4O - 0,31-0,34 Acetone C3H6O - 0,63-0,69 Acetylene, ethine C2H2-0,26-0,28 Ammonia NH3-0,17-0,19 Argon Ar - 0,23-0,25 Benzene C6H6-1,24-1,34 Bromine Br2-1,78-1,97 Butadiene C4H6-0,85-0,93 n-butane C4H10-1,10-1,22 Iso-butylene C4H8-0,94-1,06 Chlorine Cl2-0,83-0,91 Diacetylene C4H2-1,09-1,20 Dinitrogen monoxide N2O - 0,20-0,22 Ethane C2H6-0,43-0,47 Ethyl benzene C8H10-1,89-2,08 Ethylene, ethene C2H4-0,20-0,22 Ethylene glycol C2H6O2-0,78-0,88 Ethylene oxide C2H4O - 0,54-0,60 Furane C4H4O - 0,90-0,99 Helium He + 0,29 + 0,32 n-hexane C6H14-1,78-1,97 Hydrogen chloride, hydrochloric acid HCl - 0,31-0,34 Hydrogen fluoride, hydrofluoric acid HF + 0,12 + 0,14 Carbon dioxide CO2-0,27-0,29 Carbon monoxide CO - 0,06-0,07 Krypton Kr - 0,49-0,54 Methane CH4-0,16-0,17 12 A5E , 12/2010

5 Cross-sensitivities All values in this table refer to a zero calibration with oxygen and a full-scale calibration with 100% vol. oxygen. The deviations apply to 100% vol. of the associated gas, and must be considered proportionally for the zero calibration. Gas Formula Deviation at 20 C Deviation at 50 C Methanol CH4O - 0,27-0,31 Methylene chloride CH2Cl2-1,00-1,10 Monosilane, silane SiH4-0,24-0,27 Neon Ne + 0,16 + 0,17 n-octane C8H18-2,45-2,70 Phenol C6H6O - 1,40-1,54 Propane C3H8-0,77-0,85 Propylene, propene C3H6-0,57-0,62 Propylene chloride C3H7Cl - 1,42-1,44 Propylene oxide C3H6O - 0,90-1,00 Oxygen O , ,00 Sulfur dioxide SO2-0,18-0,20 Sulfur hexafluoride SF6-0,98-1,05 Hydrogen sulfide H2S - 0,41-0,43 Nitrogen N2 0,00 0,00 Nitrogen dioxide NO2 + 5, ,00 Nitrogen monoxide NO + 42, ,00 Styrene C8H8-1,63-1,80 Toluene C7H8-1,57-1,73 Vinyl chloride C2H3Cl - 0,68-0,74 Vinyl fluoride C2H3F - 0,49-0,54 Water (vapor) H2O - 0,03-0,03 Hydrogen H2 + 0,23 + 0,26 Xenon Xe - 0,95-1,02 Operation General information Measuring mode After power-on and a warming-up phase, the ULTRAMAT 23 carries out an AUTOCAL. This involves adjustment of the zero point and sensitivity of the IR channels. When a paramagnetic oxygen sensor is used, its sensitivity is also adjusted to ambient air with a concentration of 20.95% oxygen. Subsequently, the analyzer switches to measuring mode and measures continuously. Operating mode In operating mode, you can view parameters or adjust the analyzer. This supplement only describes the functions relevant to operation of the paramagnetic oxygen sensor. A complete overview of all the analyzer's control functions can be found in the standard operating instructions of the ULTRAMAT 23 (C G52xx-C216-03). A5E , 12/

6 Press the ENTER key in measuring mode to start the operating mode. The main menu appears with the follow options. Analyzer status Calibration Parameters Configuration Diagnostic control functions Diagnostic values The displayed diagnostic values provide important information for troubleshooting and calibration tasks. To view the diagnostic values of the paramagnetic oxygen sensor, navigate as follows: Diagnostics -> Diagnostic values -> Probe diagnostic values -> Choose component -> O2. The following screen appears: Sensorsig.: 1680 mv O2 : % This dialog shows the diagnostic values of the paramagnetic oxygen sensor. They have the following meaning: Probe voltage is the actual voltage of the paramagnetic oxygen sensor in mv as a non-compensated raw value. O2 is the measured oxygen value in %. Negative values are also possible here. Calibration control functions You first need to select the O2 sensor in order to adjust it. To do this, navigate in the operator menu as follows: Calibration -> Please enter code -> Calibrate probe -> Choose component -> O2. The following screen appears: Start zero cal. Start MR cal. Now you can adjust the sensor as described in the following sections. The following sequence must be observed when calibrating the sensor: 1. Calibrate the zero point of the paramagnetic oxygen sensor 2. Calibrate the measuring range of the paramagnetic oxygen sensor Adjusting the zero point You can calibrate the zero point of the paramagnetic oxygen sensor using this function. You must use nitrogen as the zero gas. Nitrogen must be connected to the sample gas inlet. To do this, navigate as follows: Calibration -> Please enter code -> Calibrate probe -> O2 -> Calibrate zero point. 14 A5E , 12/2010

7 The following screen appears: Zero calibration 0.43 % O2 Zero gas flow please Correct with ENTER Now connect nitrogen, and wait until the displayed value is stable. Subsequently begin the calibration by pressing the ENTER key. The measuring range of the paramagnetic oxygen sensor is calibrated as standard with ambient air during each AUTOCAL. However, individual calibration with a freely selectable setpoint between 2% and 100% O2 is also possible. NOTICE If an individual calibration has been carried out using calibration gas, the next AUTOCAL overwrites this calibration. The AUTOCAL must be deactivated if this is not required. Adjust setpoint You can use this function to adjust the setpoint of the calibration gas for calibration of the measuring range. To do this, navigate as follows: Calibration -> Please enter code -> Calibrate probe -> O2 -> Calibrate MR. The following screen appears: MR Cal. Set span gas value Start Cal. MR1+2 Now you can set the setpoint as follows: 1. Position the cursor at the beginning of the 2nd line (Setpoint) and press the ENTER key. The following screen appears: MR1+2: 80 % 2. Enter the desired setpoint, and then press the ENTER key. 3. Exit the menu with ESC. Calibration of the zero point must be carried out regularly to guarantee the accuracy of the paramagnetic oxygen sensor. Information on the achievable accuracy and the calibration cycles can be found in the Technical data (Page 11). Calibrating the measuring range You can calibrate the sensitivity of the paramagnetic oxygen sensor using this function. To do this, navigate as follows: Calibration -> Please enter code -> Calibrate probe -> Choose component -> O2 -> Calibrate MR. A5E , 12/

8 The following screen appears: MR Cal. Set span gas value Start Cal. MR1+2 Now perform the full-scale calibration as follows: 1. Connect the sample gas inlet (1) to the calibration gas 2. Inject calibration gas with a flow rate of l/min 3. Position the cursor at the beginning of the 3rd line (Start calibration) and press the ENTER key. Once the intended flow rate is reached, the message 'Correction with ENTER' appears in the 4th line of the display. 4. Wait until the displayed measured value has stabilized. 5. Start the calibration by pressing the ENTER key. 6. To exit the menu, press the ESCkey. Replacing the sensor The sensor may only be replaced by specially trained personnel. We therefore recommend that you return the analyzer to the factory in order to replace the sensor. If replacement is carried out on site nevertheless, you must expect limitations in the measuring accuracy. Details concerning returning the analyzer can be found in the standard operating instructions C79000-G52xx-C in Section 9.1 "Returned deliveries". Spare part The paramagnetic oxygen sensor can be ordered as a replacement part as follows: Paramagnetic oxygen sensor A5E Trademarks All names identified by are registered trademarks of the Siemens AG. The remaining trademarks in this publication may be trademarks whose use by third parties for their own purposes could violate the rights of the owner. Disclaimer of Liability We have reviewed the contents of this publication to ensure consistency with the hardware and software described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this publication is reviewed regularly and any necessary corrections are included in subsequent editions. Siemens AG Industry Sector Postfach NÜRNBERG 16 A5E , 12/2010 A5E , 12/2010