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S Q I

 

 

 

 

 

GO Systemelektronik GmbH  Faluner Weg 1    24109 Kiel     Germany  Tel.: +49 431 58080-0 

Fax: -58080-11 

Page 72 / 76 

 

 

 

www.go-sys.de    

                    [email protected]

 

Appendix D – SQI (Spectral Quality Index) 

 

 
Precondition for the calculation of the SQI is a corresponding calculation, see attached 

Manual ISA and Process 

Spectrometer Commissioning – Maintenance –Service.

 

In Situ spectrometer are used for decisions in the fields of food processing, chemical process cycles, drinking 
water monitoring, as well as in the field of wastewater treatment plant control and flow control. 

 

Functional principle: 

The measurement method of in situ spectrometer, like the ISA, is based on absorbance 

spectra. Multiple calibrations can be created with these spectra and so different chemical ingredients can be 
measured online by calculation. No chemicals are needed for this measurement method – it is not predicated 
on any laboratory test or an existing DIN standard.

 

Based on the time behaviour of the spectral data in combination with associated analytical laboratory tests, 
an algorithm is determined with a chemometrical process, to calculate the different parameters. This 
chemometrical process is a statistical method which can develop specific prediction algorithms for the par-
ticular parameters. 

 

A statistical method specially developed for the ISA allows the progressive adaptation of the calibrations, 

quality monitoring in the calculation of the algorithm

 has been given special consideration. Thus an im-

provement of the algorithm by statistical parameters is already possible during the model development.

 

The aim is to expand a general algorithm by 

on site specific

 data and so to generate 

user-specific

 algorithms.

 

Every determination which is not DIN standard brings the risk of incorrect determinations. These failures can-
not be eliminated completely by using statistically developed algorithms. When there are temporary situa-
tions which are not included in the statistical data set, the measurement reliability cannot be furthermore 
approved.

 

For this reason 

online quality detection

 and thus 

quality documentation

 of these calculations are essential 

for the use of spectral sensors especially.

 

For this purpose the Spectral Quality Index (SQI) is determined and saved for each calculated parameter by 
the ISA Spectrometer. The scaling of the SQI is as follows – under a value of 3.5 a measurement reliability of 
95% can be assumed. Up to a value of 4.0 a certainty of 90 % is given. However, when there is a permanent SQI 
above 4 determined over a longer time, it must be assumed that the spectral data set present in the range of 
the used wavelengths is no longer sufficiently statistically proven.

 

In this case a warning is issued, it is not recommended to use the calculated results for the process control. 
The system can be shifted to “emergency control signals” automatically. This process is similar to the failure 
of the lambda probe signal in the control of internal combustion engines.

 

A deviation of the SQI to values higher than 4 can also be caused by defects in the measurement system or by 
contamination or blocking of the optical measuring path.

 

Summary of Contents for 461 6002

Page 1: ...Manual ISA Spectral Analyser Operation at Work Version of this manual 6 81 en www go sys de...

Page 2: ...ction between hardware and soft ware and from the use of other components Effective product observance is only possible with adequate information from the end user about the planned field of applicati...

Page 3: ...I S A GO Systemelektronik GmbH Faluner Weg 1 24109 Kiel Germany Tel 49 431 58080 0 Fax 58080 11 Page 3 76 www go sys de info go sys de blank page...

Page 4: ...re 15 6 Commissioning 15 7 Measurement Cycle 16 8 Menu Operation 17 8 1 The Spectrometer Menus Intensity 17 8 1 1 Interval and Average 19 8 1 2 Table and Diagram 19 8 2 2 1 Table Display 20 8 2 2 2 Di...

Page 5: ...1 Example Calculation of a Fingerprint Difference 54 13 2 ISA Formula Examples 57 14 Parameter Accuracy 58 15 CAN bus Connection and Termination of the External Spectrometer Sensor Module 59 16 Conne...

Page 6: ...ning maintenance and service This is described in the attached Manual ISA and Process Spectrometer Commissioning Maintenance Service The symbol indicates useful additional information The symbol indic...

Page 7: ...d The entire control and analysis electronics are mounted in a BlueBox TS with integrated spectrometer sensor unit or in an external spectrometer sensor module The ISA is thereby usable in a high temp...

Page 8: ...n of the BlueBox TS or the external spectrometer sensor module The air consumption of the compressed air cleaning depends on the connection pressure 4 6 bar and the back pressure in the medium and is...

Page 9: ...ox can be found in its attached manual 2 Sensor head The ISA sensor head is manufactured from high grade steel optional titanium Only the optics and the compressed air cleaning are integrated in the m...

Page 10: ...nik GmbH Faluner Weg 1 24109 Kiel Germany Tel 49 431 58080 0 Fax 58080 11 Page 10 76 www go sys de info go sys de Scope of delivery ISA TS Article No 486 0060 Scope of delivery ISA T4 Article No 486 0...

Page 11: ...2 Additional Scope of Delivery ISA mobile 1 Case with a integrated combination of ISA TS with a BlueBox Power Up Control Power Management Module PMM inclusive two 12 V accumulator batteries 2 12 VDC b...

Page 12: ...a USB housing connection and with an integrated power supply at the serial interface RS 232 RS 485 see also Appendix B Connections at the BlueBox Version TS External sensor module Power supply 24 VDC...

Page 13: ...cified in chapter 2 Tech nical data If the instrument is moved from a cold to a warm environment condensation might form which could influ ence its function In this case wait for the instrument to rea...

Page 14: ...he lower lug of the sensor head and the grounding screw of the spectrometer sensor module must be less than 50 Parameter Electrical data maximal input voltage of the sensor module 36 VDC Range of ambi...

Page 15: ...m The Sensor module and the BlueBox are in version ISA T4 connected by CAN bus cable type of cable LiYCY 2x2x0 5 mm with an impedance of approx 100 Cable lengths up to 200 m are possible so that the B...

Page 16: ...ht flashes per single measurement configuration parameter Intensity repeated a number of times Number of repetitions configuration parameter Average The final measurement result is the arithmetic mean...

Page 17: ...ctory preset all sensors and actuators are displayed These selection funktion is only operable if in the display men Selected sensors is active see Manual BlueBox T4 there 8 2 1 6 Display System Senso...

Page 18: ...tronik recommends a minimum interval of 60 otherwise the lifetime of the xenon flash lamp will be shortened see 8 1 1 Interval and Average Switches to the input of the average The number of single mea...

Page 19: ...ithmetic mean values of the respective spectral values of the single measurements result the measured spectrum Current settings are displayed as Actual value Deletes the last entered digit Saves the e...

Page 20: ...lay switches back to the spectrometer menu MVRs over the past 21 24 hours depends on the value range Pressing the display switches back to the spectrometer menu The diagram display is only an overview...

Page 21: ...er of the sensor 0 9 Interval measurement interval of the spectrometer Average measurement average Resolution standard value is 1 no decimal places Parameter name of the parameter here nothing Unit un...

Page 22: ...r cleaning before each measurement 2 compressed air cleaning before each second measurement and so on Only visible when compressed air cleaning is active System Sensors Actuators User Service Help 09...

Page 23: ...rvice menu II Opens an input menu for a probe number commas are saved as a point The last recorded spectrum is saved as sample spectrum reference spectrum under the entered sample number Starts a meas...

Page 24: ...l sensors Icon of the two internal current outputs the two internal relay outputs and the two internal pulse inputs Icon of a spectrometer Icon of the serial interface2 Icon of the messages SMS and e...

Page 25: ...with magnifying glass Waiting for the first measurement value Warning sign The measurement value is outside the measurement range limits1 or the limit value of the SQI value of an application specifi...

Page 26: ...reset Fu noten 1 2 Opens the configuration window of the spectrometer see 9 2 1 The Configuration Window of the Spectrometer Opens the spectra window see 9 2 2 The Spectra Window Opens the spectra win...

Page 27: ...espective spectral values of the single measurements result the measured spectrum Wait until the end of a measurement before making an input Opens a menu where you can define how the measurement value...

Page 28: ...f the Zeiss spectrometer Zeiss Coefficients C0 C1 C2 C3 C4 Zeiss Coefficients In the case that the Zeiss Coefficients need to be changed the Checksum field serves to verify the inputted values Checksu...

Page 29: ...of the measurement path length of the sensor head in mm The path length is measured e g with a calliper take care not to damage the optics If the path length is used in an AMS formula query command I...

Page 30: ...coefficients see pre previous page to each even numbered wavelength of 200 nm to 708 nm there is assigned a value Uneven numbered wavelengths get the value of the preceding even numbered wavelength M...

Page 31: ...in the upper right The values of the x axis are the light wavelengths of 200 nm to 708 nm the values of the y axis the absorbance factor The spectra shown here are typical clear water absorbance spec...

Page 32: ...pper right The values of the x axis are the steps of the spectral resolution of the spectrometer 0 254 the values of the y axis the counts of the AD converter 0 30000 The spectra shown here are typica...

Page 33: ...ation from this reference The date and time of the current clearwater calibration are displayed above the line diagram Start measuring Starts a measurement the measurement interval then starts again C...

Page 34: ...has been exceeded T nn n C Temperature of the spectrometer electronic D nnn MVR2 of the dark measuring see 7 Measurement Cycle 9 2 2 6 Fingerprint previous function up to AMS software version 4 3 4 0...

Page 35: ...ance spectra view there is a new Button Click on this Button opens and closes the Min Max spectral values view The minimum and maximum values of the single wavelengths of the absorbance spectra record...

Page 36: ...erprint ISA FP identification number wavelength deviation in percent from the fingerprint at a wavelength The previous formula entry ISAFP n is no longer valid Start Wavelength End Wavelength Limits t...

Page 37: ...ion number 0 see above to the last recorded absorbance spectrum Fu note i e the position of the absorbance spectrum in the fingerprint In this view the deviation in percent of the last recorded absorb...

Page 38: ...d configured For more information on customer specific application parameters please contact GO Systemelektronik Example COD COD Double click in the AMS start window This opens the sensor setup window...

Page 39: ...spectrometer interval of 60 the calculation of the sensor value takes place at every second spectrum capture Other values are taken as the next largest integer multiple of the spectrometer interval M...

Page 40: ...tion Modified Date and time of the last transmitted changes from this window Absorbance Wavelength x Factor Calibration values means the differences of the adjacent absorbance values Options Normalize...

Page 41: ...s of transmitting the spectrometer data from the BlueBox to a PC Transmitting with BlueBox SQL Software Here the whole data of the BlueBox are transmitted to the PC Transmitting with ISA Data Here onl...

Page 42: ...the MVR of the raw spectrum If this check box is activated all those values are transmitted automatically which had been recorded since the point in time of the last data transmission This point in ti...

Page 43: ...ta The call up is made with the program BlueBox SQL A list appears containing all the spectra from one spectrometer unit connected to the BlueBox for the selected time period Here you can select these...

Page 44: ...and Display the Spectra The call up is made with the program BlueBox SQL Select a BlueBox a spectrometer a time period and a time zone The selected spectra are listed in the spectra list There are two...

Page 45: ...0 254 the values of the y axis the counts of the AD converter 0 30000 In the upper right the recording times of the spectra are listed with their line colour Click on an entry activates the respective...

Page 46: ...ferent colours The values of the z axis are the recording times of the spectra You can then use the cursor to move to the single points of the spectra surface On the bottom left the date and time of t...

Page 47: ...JCAMP DX data format see 12 3 Export Spectra Data Abs spectrum Display of the absorption spectra Raw spectrum Display of the raw spectra f x 1th derivation Displays the graphs of the first derivation...

Page 48: ...ks all spectra Marks max 500 spectra distributed evenly over the selected time period Retrieves all ever captured spectra of the clearwater calibration Retrieves all ever defined reference spectra Dem...

Page 49: ...umber to a marked spectrum entered commas are saved as point A spec trum with probe number is a reference spectrum and is red marked in the spectra list You delete a probe number by clicking on OK wit...

Page 50: ...lication specific calibration see Manual ISA and Process Spectrometer Commissioning Maintenance Service there 4 3 Application Specific Calibration In the next window you specify name and memory locati...

Page 51: ...11 4 1 Apply Calibration Data to Existing Spectra Here you can apply ISA Plus calibration files to your spectra in the database The calibration files are generated with an application calibration2 an...

Page 52: ...tection The measurement values determined with number of values see above are sorted by size 1 The lower and upper 10 percent by number are removed and the arithmetic mean is calculated 2 The lower an...

Page 53: ...I S A GO Systemelektronik GmbH Faluner Weg 1 24109 Kiel Germany Tel 49 431 58080 0 Fax 58080 11 Page 53 76 www go sys de info go sys de 12 Language Options...

Page 54: ...o be defined with the entry ISA CAN ID To this spectrometer the following ISA specific formula elements relate CAN ID CAN ID of a spectrometer 13 1 Example Calculation of a Fingerprint Difference This...

Page 55: ...t text for AMS and BlueBox SQL software max 20 characters Parameter Name of the measured parameter max 20 characters Unit Unit of the output value More than 5 characters can t be displayed at the Blue...

Page 56: ...capture Other values are taken as the next largest integer multiple of the spectrometer interval Min Value Lower value limit Max Value Upper value limit Average The number of single measurements from...

Page 57: ...ple Value 0 06347 Value ISA 284 28 547863 Value ISA 332 51 927711 Value ISA 628 30 110743 if Value 0 Value 0 Value The formula calculates the Spectral Absorbance Coefficient SAC at 254 nm ISA SAK254 I...

Page 58: ...analytical method and the care in the procedure are the most important require ments for the accuracy of the calculation The accuracy of the ISA parameter calibration is depending upon the specific ac...

Page 59: ...go sys de 15 CAN bus Connection and Termination of the External Spectrometer Sensor Module DIP switch at On Sensor module is terminated DIP switch at Off Sensor module is not terminated Termination o...

Page 60: ...ternal Spectrometer Sensor Module 17 Connection of the Compressed Air Line Push the PU tube into the plug connector until it stops approx 5 mm Press with a suitable tool on the outer ring of the plug...

Page 61: ...ktronik GmbH Faluner Weg 1 24109 Kiel Germany Tel 49 431 58080 0 Fax 58080 11 Page 61 76 www go sys de info go sys de Appendix A The Configuration Data Sheet The configuration data sheet contains the...

Page 62: ...ry of the BlueBox here CF 256 CF CompactFlash 256 256 MB set at the factory changeable by replacing 2 Network IP Address 192 168 1 167 Netmask 255 255 255 0 Gateway 0 0 0 0 Port 14111 Login Name blueb...

Page 63: ...ox SQL Software see Manual BlueBox PC Software there 3 2 2 Setup of a new BlueBox 5 Spectrometer Components Spectrometer Board Serial Number ISA12345 ISA Sensor Head Serial Number 1234 Fibre Optic Cab...

Page 64: ...ad cable 6 LAN connection for LAN cables in standard or cross link design 7 Serial interface connection RS 232 or RS 485 switchable and 12 VDC power supply via a 3 pin M8 panel plug male 8 Current out...

Page 65: ...ignment BlueBox TS Power supply 24 VDC panel plug M12 male 3 24 VDC 4 GND 24 V CAN bus panel socket M12 female 1 CAN H 2 CAN L 3 24 VDC 4 GND 24 V Relay outputs panel socket M12 female 1 NC1 normally...

Page 66: ...11 Page 66 76 www go sys de info go sys de RS 232 or RS 485 with power supply panel plug M8 male RS 232 1 GND GND RS 485 2 12 VDC 12 VDC 3 RX RX TX 4 TX RX TX Current output 4 20 mA panel socket M8 f...

Page 67: ...x System Starts up and shuts down the BlueBox at user specified intervals Protects the accumulator batteries from deep discharge The Power Up Control is described in Manual BlueBox Power Management Mo...

Page 68: ...rage 10 C to 50 C operation 0 C to 40 C Weight 19 kg Accumulator batteries Pb accumulator 2 x 7 Ah Length sensor head cable 6 m Connections outside compressed air connector quick connector 4 mm PU tub...

Page 69: ...indicator light red The charge device is not connected orange The charge device charges green The charging process is completed 4 Pull the tab on the holding clamps to the top 5 Disconnect the sensor...

Page 70: ...he Power Up Control is deactivated The BlueBox is continuously supplied with power 7 1 Switch to operation mode manual the BlueBox starts up 7 2 Do the necessary settings 7 3 Switch to operation mode...

Page 71: ...is a label with the access data of the BlueBox Serial Number serial number of the BlueBox With this serial number the BlueBox is identified by the BlueBox PC Software set at the factory not changeable...

Page 72: ...n im provement of the algorithm by statistical parameters is already possible during the model development The aim is to expand a general algorithm by on site specific data and so to generate user spe...

Page 73: ...which was ascribed to a faulty compressor By the use of the SQI the failure of the cleaning was detected very quickly and could be fixed without causing major damage In October there was a brief sing...

Page 74: ...i o n s o f C o n f o r m i t y GO Systemelektronik GmbH Faluner Weg 1 24109 Kiel Germany Tel 49 431 58080 0 Fax 58080 11 Page 74 76 www go sys de info go sys de Appendix E EU Declaration of Conformi...

Page 75: ...s o f C o n f o r m i t y GO Systemelektronik GmbH Faluner Weg 1 24109 Kiel Germany Tel 49 431 58080 0 Fax 58080 11 Page 75 76 www go sys de info go sys de Appendix F EU Declaration of Conformity ISA...

Page 76: ...a t i o n s o f C o n f o r m i t y GO Systemelektronik GmbH Faluner Weg 1 24109 Kiel Germany Tel 49 431 58080 0 Fax 58080 11 Page 76 76 www go sys de info go sys de Appendix G EU Declaration of Confo...

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