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OSCAR G2 

Manual  

D01-44en201810 
Software V.1.1.6 

 

(C)TriOS Mess- und Datentechnik GmbH 
Bürgermeister-Brötje-Str. 25 
D- 26180 Rastede/Germany

 

19 / 62 

 

2.2  Basic measuring arrangement of the OSCAR 

The 

OSCAR

 sensor consists of a multi-LED light source that emits a defined radiation in the 

visible range, a lens system, the cavity and a miniature spectrometer. The cavity contains the 

liquid sample to be measured. The 

TriOS Mess- und Datentechnik GmbH

 absorption meter 

can be purchased in two different cavity diameters (50 mm and 80 mm).  

 

 

Fig. 2. Illustration of the 

OSCAR

 sensor with 80 mm cavity     

 

 

Summary of Contents for OSCAR G2

Page 1: ...integrating cavity absorption meter Manual preliminary release 17 10 2018 TriOS Mess und Datentechnik GmbH B rgermeister Br tje Str 25 D 26180 Rastede Germany fon 49 0 4402 69670 0 fax 49 0 4402 69670...

Page 2: ...ction 11 2 1 Measuring principle 11 2 1 1 Measurement setup 12 2 1 2 Theoretical considerations 13 2 1 3 Calibration 15 2 1 4 Calibration procedure in short 16 2 1 5 Measurement of the absorption coef...

Page 3: ...1 2 Data logger 30 4 1 3 Measurement 32 4 1 4 Peripherals 39 4 1 5 System 41 4 1 6 Calibration 43 4 2 Data calculation with MSDA_XE 48 4 2 1 Calculation of the reflectivity 48 4 2 2 Calculation of ab...

Page 4: ...C TriOS Mess und Datentechnik GmbH B rgermeister Br tje Str 25 D 26180 Rastede Germany 4 62 7 Warranty 60 8 Support 61 8 1 Fast functional test 61 9 Contact information 62...

Page 5: ...fessional use of the sensor This device is designed for use in science The intended use of the OSCAR is to measure the absorption of water or aqueous fluids e g river water sea water ground water in a...

Page 6: ...in the UV range can affect the skin or eyes Never look directly into the light source The emitted radiation can cause injury to the eyes Reagents In use of reagents follow the safety and operating ins...

Page 7: ...of NBR nitrile butadiene rubber On custom request sealing rings of other materials can possibly be used Before operation take care that the assay medium does not damage the seals Before operating che...

Page 8: ...rvice Never attempt to disassemble or alter any part of it to make changes that are not expressly described in this guide Internal inspections alterations and repairs should be performed by the equipm...

Page 9: ...the specified please contact support of TriOS Mess und Datentechnik GmbH support trios de CAUTION Avoid every contact with the glass and plastic components in the cavity because they can be scratched...

Page 10: ...e and its accessories may be returned for environmentally friendly disposal The previous professional decontamination must be proven by a certificate Please contact us before you send the device to th...

Page 11: ...gnal and the absorption is strongly overestimated The observed light attenuation has often to be corrected to receive the correct absorption by subtracting the scattering signal Furthermore the genera...

Page 12: ...R ttgers et al 2005 First results with natural sample are shown in R ttgers et al 2007 and R ttgers Doerffer 2007 First results from a flow through system are shown in Wollschlaeger et al 2013 2 1 1 M...

Page 13: ...central light source directly It measures the light reflected at the cavity wall opposite to the collector as well as the path radiance i e the light scattered into the receiving cone of the collecto...

Page 14: ...4 1 2 2 exp 1 2 1 2 2 ar ar r a r a PS 5 Finally the transmission in the PSICAM is related to the absorption coefficients aA and aB of the two solutions as 0 1 exp 1 S B S A AB A B S A S B P a r P a...

Page 15: ...is determined following the suggestion by and description in Leathers et al 2000 Therefore the transmission TAB is determined from a sample solution A with an absorption coefficient aA measured again...

Page 16: ...he calibration solution has been measured the PSICAM has to be cleaned as the stain adsorbs considerably fast on the cavity wall of the PSICAM Therefore the PSICAM is bleached for 15 min with a 0 1 so...

Page 17: ...y need to be recorded for a later temperature and salinity correction of the pure water absorption see below For each sample measurement TAB can be calculated by using the reference measurement taken...

Page 18: ...002 R M Pope and E S Fry Absorption spectrum 380 700 nm of pure water II Integrating cavity measurements 1997 Appl Opt 36 33 pp 8710 8723 R M Pope A D Weidemann and E S Fry Integrating Cavity Absorpti...

Page 19: ...e OSCAR sensor consists of a multi LED light source that emits a defined radiation in the visible range a lens system the cavity and a miniature spectrometer The cavity contains the liquid sample to b...

Page 20: ...OSCAR G2 Manual D01 44en201810 Software V 1 1 6 C TriOS Mess und Datentechnik GmbH B rgermeister Br tje Str 25 D 26180 Rastede Germany 20 62 2 3 Technical specifications...

Page 21: ...to operation it should be ensured that it is securely fastened and that all connections are wired correctly 3 1 Electrical installation 3 1 1 Power supply The OSCAR sensor is designed for 12 24 VDC Wi...

Page 22: ...ereby support the EIA 232 RS 232 and EIA 485 RS 485 standards Via the web interface see Fig 20 it is possible to switch these standards Both EIA 232 and EIA 485 are voltage interfaces as opposed to a...

Page 23: ...sensors Thus there is almost no difference whether a connection to a single sensor or a complex sensor network should be established Fig 5 Single sensor network Fig 5 Single sensor network The easiest...

Page 24: ...G2 Interface Box 1 Power Supply 12 VDC or 24 VDC 2 1 mm connector 2 Sensor connector 8 Pin M12 3 Ethernet connector RJ 45 In order to connect to an Ethernet enabled device using the OSCAR sensor inte...

Page 25: ...interface can be used with any web browser via the URL http oscar or http oscar_B0XX B0XX is the serial number or http 192 168 77 1 NOTE If the web interface is not accessible make sure that the LAN c...

Page 26: ...avoid damages by squeezing the sensor tube The clamps can be purchased from TriOS Mess und Datentechnik GmbH The operating pressure inside the cavity should not exceed 1 bar difference compared to it...

Page 27: ...OSCAR G2 Manual D01 44en201810 Software V 1 1 6 C TriOS Mess und Datentechnik GmbH B rgermeister Br tje Str 25 D 26180 Rastede Germany 27 62 Fig 8 Specific holder for the OSCAR...

Page 28: ...s are equipped with a web interface for sensor configuration and calibration To access the web interface you need a G2 interface box an Ethernet cable and an Ethernet enabled device with a web browser...

Page 29: ...here is a button which shows the contact details of the corresponding TriOS dealer or TriOS Mess und Datentechnik GmbH The menu is used to navigate in the web interface Each line is a link to another...

Page 30: ...e OSCAR sensor is equipped with an internal data logger with a data memory of 2 GB This allows the OSCAR sensor an almost completely self sufficient operation over a very long period The only accessor...

Page 31: ...ensor stores and presents data as CSV Comma Separated Values and MSDA_XE files CSV files can be read by the most popular spreadsheet programs MSDA_XE files can be opened with the freeware MSDA_XE deve...

Page 32: ...tton For safety users will be prompted for confirmation before deletion Fig 12 Fig 12 Web Interface Data logger delete data confirmation window 4 1 3 Measurement The Measurement page Fig 13 shows the...

Page 33: ...r Br tje Str 25 D 26180 Rastede Germany 33 62 The Spectrum item shows the current spectrum You can press the Download button to download this spectrum to the computer Fig 14 shows the example of an at...

Page 34: ...e saved and written into spectrum attributes In case of any temperature or salinity change the new values always have to be entered manually With the button measure now the spectrum type that is set c...

Page 35: ...Manual D01 44en201810 Software V 1 1 6 C TriOS Mess und Datentechnik GmbH B rgermeister Br tje Str 25 D 26180 Rastede Germany 35 62 Fig 16 Web interface Measurement sub item Spectrum spectrum type tra...

Page 36: ...Manual D01 44en201810 Software V 1 1 6 C TriOS Mess und Datentechnik GmbH B rgermeister Br tje Str 25 D 26180 Rastede Germany 36 62 Fig 17 Web interface Measurement sub item Spectrum spectrum type ca...

Page 37: ...s and spectra You may also enable automatic measurements and specify the corresponding measurement interval Under Spectra Type you can select the spectrum type that will be sent for example to a TriOS...

Page 38: ...roperly The integration time IT should always be in automatic mode or readings can become unreliable The maximum values are 12 h for the interval 24 for the averaging and 60 s for pause If the entered...

Page 39: ...r tje Str 25 D 26180 Rastede Germany 39 62 Fig 19 Web interface Measurement sub item Settings error message 4 1 4 Peripherals The Peripherals page is used to configure the interface select a protocol...

Page 40: ...iOS Mess und Datentechnik GmbH B rgermeister Br tje Str 25 D 26180 Rastede Germany 40 62 Fig 20 Web interface Peripherals The factory settings are Protocol Modbus Hardware mode RS 485 Baud rate 9600 F...

Page 41: ...te i e transmission speed Note Reduce the baud rate should there be communication difficulties Flow control Enables flow control on the software level XON XOFF Note This is only supported with the Tri...

Page 42: ...st sensor calibration to a PC or other support The OSCAR sensor opens a window presenting all data held in the calibration file This file must be stored and kept safe For the normal user this file is...

Page 43: ...creen The following error messages and warnings are possible File not OK The calibration file could not be read correctly Check the path and select the correct file If the error persists contact TriOS...

Page 44: ...GmbH B rgermeister Br tje Str 25 D 26180 Rastede Germany 44 62 Fig 22 Web Interface Calibration On the page Calibration sub item Waterbase the calibrated spectrum of the water basis zero line in ultr...

Page 45: ...OSCAR G2 Manual D01 44en201810 Software V 1 1 6 C TriOS Mess und Datentechnik GmbH B rgermeister Br tje Str 25 D 26180 Rastede Germany 45 62 Fig 23 Web Interface Calibration sub item Waterbase...

Page 46: ...ation sub item Waterbase settings We recommend to set the averaging from 5 to 10 and the pause to 60 seconds Set the temperature for the ultra pure water and then press the calibrate button Fig 24 On...

Page 47: ...OSCAR G2 Manual D01 44en201810 Software V 1 1 6 C TriOS Mess und Datentechnik GmbH B rgermeister Br tje Str 25 D 26180 Rastede Germany 47 62 Fig 25 Web Interface Calibration sub item Nigrosin...

Page 48: ...ectra has the unit 1 m on the log10 scale So it is easily possible to compare the absorption spectra measured with OSCAR with other common absorption spectrometer The actual version of the MSDA_XE sof...

Page 49: ...er Br tje Str 25 D 26180 Rastede Germany 49 62 Import the ini file of the OSCAR Fig 26 Device manager of MSDA_XE Open the OSCAR control window direct from the device manager Fig 26 and Fig 27 Mark OSC...

Page 50: ...C TriOS Mess und Datentechnik GmbH B rgermeister Br tje Str 25 D 26180 Rastede Germany 50 62 Fig 28 OSCAR control window Press More in the appearing window to open the advanced settings Fig 28 Fig 29...

Page 51: ...y 51 62 Press the tab Zero Settings Fig 29 In this page spectra can be selected from the database for the reflectivity calculation see Fig 30 Fig 30 OSCAR control window for the reflectivity calculati...

Page 52: ...A_XE software If necessary update the temperature values Press Calculate reflectivity For more detailed information on the plotting options database operations and all general MSDA_XE features please...

Page 53: ...s data source and enter the right parameter files Fig 31 Absorption window for the calculation of absorption spectra with reflectivity Mark the spectra that should be calculated in the database and se...

Page 54: ...alinity of the medium If the temperature and salinity of the medium are constant you can set the values before starting automatic measurements under the page measurement spectrum see Fig 14 Confirm th...

Page 55: ...to solve hard dirt To save the connector and be sure that it is dry at every time it is recommended to use a dummy plug for the connector If the sensor is heavily dirty an additional cleaning with a...

Page 56: ...the wall with unprotected finger should be avoided Optical influences by organic material attached to the wall can further be removed by bleaching for about 15 minutes using a ca 0 1 sodium hypochlori...

Page 57: ...2 Be careful when opening the cavity see Fig 34 The inner area may not be scratched and the light source glass sphere and fibre rod need to be handled with maximum care since it can break easily Pleas...

Page 58: ...tric flask The Nigrosin dilution is measured three times with an absorption spectrometer Perkin Elmer Lambda 850 in a 100 mm cuvette The three measurements are averaged The temperature of the Nigrosin...

Page 59: ...measurement The reference Nigrosin measurement is imported from clipboard as described in chapter 4 2 1 The reflectivity is calculated 6 3 Reference spectrum of Nigrosin The following figure shows an...

Page 60: ...installed powered and operated in compliance with the directions of this manual o Damage resulting from contact with incompatible materials fluids or gases e g corrosive acid solvent materials fluids...

Page 61: ...0 4402 69 67 0 0 fax 49 0 4402 69 67 0 20 To arrange a quick help please send us via email the device number and the file trace log that can be downloaded from the sensor under the page system The fi...

Page 62: ...tes If you identified any problems concerning the sensor device respectively the corresponding software or if you would like to see some additional features enabled in a future version please feel fre...

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