PASCO Specialty & Mfg. PS-2116A User's Manual
Contents
1. Instruction Sheet 012 09688B Conductivity Sensor PS 2116A Range Select Buttons Conductivity Probe Included Items Conductivity Sensor 10X Conductivity Probe PS 2571 Required Items PASCO Interface PASCO Data Acquisition Software See the PASCO catalog or the PASCO web site at www pasco com for more information Recommended Item Sensor Extension Cable PS 2500 Introduction The PS 2116A Conductivity Sensor measures ionic and non ionic molecules in aqueous solutions These measure ments can be used to investigate factors that influence the electrical conductivity of liquids This sensor can be used to explore the effects of temperature and concentration on the electrical transport properties of aqueous solutions The Sys teme International SI unit for conductivity is the stemen per centimeter S cm When dealing with a chemical solu tion ranging from extremely dilute to very concentrated chemical use of conductivity units of uS cm and mS cm are common In these applications conductivity has the advan tage of an almost direct relationship with impurities espe cially at low concentration The sensor has three ranges PASC Ce 1 916 786 3800 support pasco com The sensor is designed to work with a PASPORT compatible interface such as the UI 5100 850 Universal Interface and PASCO data acquisition software such as PASCO Cap stone to measure electrolytic conductivity The 10X Conductivity P2. The green light emitting diode LED for that button will shine The sensor continuously monitors conductivity even if data are not being recorded It detects when the conductivity level is too high for the selected range When this occurs the LED for the selected range will blink and the LED in the button for the next higher range flashes Press the button with the flashing LED to select the proper range Solution Conductivity Ultra Pure water 0 05 uS cm Distilled water 0 5 Drinking water 50 to 1500 Sea water 53 000 Brackish water 1000 to 80 000 Safety CAUTION Always use eye protection gloves and an apron when work ing with chemicals Making Measurements Using PASCO Capstone Software e Start the PASCO data acquisition software e Click the Hardware Setup icon in the Tools palette to open the Hardware Setup panel Confirm that the sen sor s icon appears with the interface s icon 2 012 09688B Specifications e Click one of the display templates in the Capstone work book page or double click an icon in the Displays palette to open a specific data display e Click Record to begin recording data Using SPARK vue Software e Connect the sensor to a SPARK vue compatible inter face and start the software The sensor parameter screen opens and shows the list of measurements for the sensor e Inthe sensor parameter screen touch the measureme
3. 2116A However the Conductivity Probe can also be stored dry If the probe is stored dry it should be soaked in deionized or distilled water for 5 to 10 minutes before use Suggested Activities e Concentration Dependence of Conductivity in Aqueous Solutions e Temperature Dependence of Conductivity in Dilute Aqueous Solutions e Acid Base Titration with the Conductivity Sensor More Information For the latest information about the Conductivity Sensor visit www pasco com and enter PS 2116A in the Search window Technical Support For assistance with any PASCO product contact PASCO at Address PASCO scientific 10101 Foothills Blvd Roseville CA 95747 7100 Phone 1 916 462 8384 worldwide 877 373 0300 U S E mail support pasco com Web Www pasco com Limited Warranty For a description of the product warranty see the PASCO catalog Copyright The PASCO scientific nstruction Sheet is copyrighted with all rights reserved Permission is granted to non profit educational institutions for reproduction of any part of this manual providing the reproductions are used only in their laborato ries and classrooms and are not sold for profit Reproduction under any other circumstances without the written consent of PASCO sci entific is prohibited Trademarks PASCO PASCO Capstone PASPORT SPARK Science Learning System SPARK SLS and SPARKvue are trademarks or registered trademarks of PASCO sci entific in the United St
4. 3 choose the type of calibration The default choice is One Standard 1 point slope Click Next to open the fourth step 4 Calibrate the second point Seema em 1000 uS cem Set Current Value to ell Value Back Next Cancel e In Step 4 enter the conductivity value of the standard conductivity solution in the Standard Value text area For example if the standard conductivity solution has a value of 210 see the table above then enter 210 as the Appendix Calibration Standard Value Click Set Current Value to Standard Value and then click Next to go to the last step 5 Review your calibration and accept Back Finish e The Calibration panel shows the calibration informa tion In Step 5 check that the calibration information is acceptable Then click Finish e The Calibration panel returns to Step 1 Click the Cali bration icon in the Tools palette to close the panel Calibration SPARKvue Turn on the SPARK SLS hand held datalogger Connect the Conductivity Sensor to one of the PASPORT input ports on the SPARK SLS The sensor parameters screen for the Con ductivity Sensor opens A Conductivity 10X Probe Conductivity 1X Probe 24 uS em 2 wS cm Model No PS 2116A In the Conductivity Sensor screen touch Conductivity 10X Probe to select that choice and then touch Show Sel Conductivity Sensor er 10X25
5. ates and or in other countries For more infor mation visit www pasco com legal Product End of Life Disposal Instructions This electronic product is subject to disposal and recycling regula tions that vary by country and region It is your responsibility to recy cle your electronic equipment per your local environmental laws and regulations to ensure that it will be recycled in a manner that protects human health and the environment To find out where you can drop off your waste equipment for recycling please contact your local waste recycle disposal service or the place where you purchased the product The European Union WEEE Waste Electronic and Electrical Equipment symbol to the right and on the product or its packaging indicates that this product must not be disposed of ina standard waste container FASC Qi Technical Support Appendix Calibration Before calibration soak the Conductivity Probe in deionized or distilled water for five to ten minutes To make a standard conductivity solution for calibration sodium chloride NaCl deionized water 1 liter a 1 liter flask a mass balance and a stir rod are needed e Prepare one of the weight percent sodium chloride NaCl solutions given in the table below Weigh out the desired mass in milligrams and place the salt in a 1 liter flask Add 500 milliliters ml of deionized water and stir the solution to dissolve the salt Add the remaining 500 ml of deionized wa
6. lue 100 00 Units Read From Sensor W New Calibration Cancel Touch Standard Value to open the keypad Use the keypad to enter the standard value for the conductivity of the standard conductivity solution Bee nen Oe When the number is entered touch OK on the keypad to return to the Calibrate Sensor screen Touch OK to finish the calibration 012 09688B 5 Conductivity Sensor Calibration Xplorer GLX Turn on the Xplorer GLX hand held datalogger Connect the Conductivity Sensor to one of the PASPORT input ports on the GLX Press the Home Screen key A 21698 Ph 02 26 14 Data Files AplorerGlx ior D a R Calculator e On the keypad press F4 F to open the Sensors screen for the Conductivity Sensor 22312 Phl 022814 H Conductivity sensor AplorerGlx ie DO ga ample Rate Unit samples s Sample Rate Reducesmooth Averaging iH Conductivity 10 Probes Ti Conductivity 1X Probe Not visible y Mode Properties Microphone Sensors z e On the keypad press F4 F again to open the Sen sors menu Use the down arrow key D to select Calibrate from the menu Anao Phl 02 28 14 t Conductivity Sensor XplorerGLX D ga Sample Rate Unit sampless keduceimooth Averaging T Conductivity Ox Probe Visible Add T Conductiwity 1x Probe Mode Properties Microphone BAINNE e In the Calibrate Sensors scree
7. n the highlighted selec tion is Conductivity Sensor and the choice for Cali bration Type is 1 Point Slope 31 10 PM 02 28714 Calibrate Sensors XplorerGLX r DO em Conductivity Sensor 7 Calibration Type Pt 2 usvcm 4 Pt 2 Units a 43 19 Sem Ooo Cancel Read Pt 4 313 Units 012 09688B Appendix Calibration e Use the down arrow to highlight the Pt 2 uS cm text area Calibrate Sensors Calibration Type Point Slope if Pa 100 0 Pt 2 u5 crm Pt 2 Units ae AAT uSfcrm 4 347 Units OK canel Read Pt e Use the numeric keypad to enter the value of the stan dard conductivity solution Press FI D to select OR Press the Home Screen key to return to the Home Screen Sources of Conductivity Data Environmental Chemistry Air and Water Pollution 2nd ed H Stephen Stover and Spencer L Seager Scott Fores man and Company Glenview Illinois 1976 International Critical Tables Vol VI pp 230 258 McGraw Hill 1929 Handbook of Chemistry and Physics 78th Edition CRC Press 1997 Electrolyte Solutions Robinson and Stokes Butterworths 1959 PASC Oi
8. nt and then touch Show to open a graph display of the measurement e Touch Star C to begin recording data Using the Xplorer GLX e Turn on the Xplorer GLX and connect the sensor to a port on the top A Digits display of conductivity opens automatically and shows the data being monitored e Press the Start Stop key to begin recording data Press the same key again to stop recording Calibration Information See the Appendix for detailed information about calibrating the Conductivity Sensor More Information For more information about collecting recording displaying and analyzing data refer to the User s Guide or Online Help System for the data acquisition software Specifications Item Value Ranges 0 to 100 uS cm 0 to 10 000 uS cm 0 to 100 000 uS cm Accuracy 10 of full range for all ranges Resolution 0 1 or better Operating Temperature 0 to 50 C Maintenance Cleaning The electrode cell in the end of the Conductivity Probe must be clean for accurate and reproducible results A dirty elec trode cell will contaminate the sample being tested The electrode cell can be cleaned with detergent or dilute nitric acid 1 by stirring the end of the probe in the clean ing solution for three minutes Rinse thoroughly Storage The best method for storing the Conductivity Probe is to immerse the end of the probe in deionized or distilled water PASC Oi Model No PS
9. robe can be replaced if necessary Sensor Theory Conductance is the reciprocal of resistance Conductivity is the specific conductance of a material The conductivity 1s the conductance measured between the opposite faces of a one centimeter cube of the material The electrode cell in the end of the Con ductivity Probe is constructed of an insulating material embedded with pieces of platinum These metal contacts serve as sensing elements and are placed at a fixed distance apart Platinum electrodes Setup the Sensor e Soak the end of the probe in deionized or distilled water for five to ten minutes e Connect the BNC Connector of the Conductivity Probe to the BNC Port on the sensor e Plug the sensor into one of the PASPORT input ports of a PASCO PASPORT compatible interface 800 772 8700 www pasco com Conductivity Sensor Interface PASPORT Input Port a a i Hay an ee e PN L TO e Se nsor NOTE If more distance is needed between the sensor and the interface plug the sensor into a Sensor Extension Cable optional and then plug the cable into the interface Select a Range The three ranges are represented by the icons next to the range select buttons The water glass range is O to 1000 microsiemens per centimeter the chemistry flask range is 0 to 10 000 and the ocean wave range is 0 to 100 000 U To select a range press one of the Range Select Buttons on the sensor
10. ter and stir the solution again Weight Mass of NaCl Conductivity mg uS cm at 25 C 0 001 10 21 4 0 01 100 210 0 1 1 000 1 990 1 0 10 000 17 600 10 0 100 000 140 000 e After preparing the standard conductivity solution put the end of the Conductivity Probe into the solution Calibration PASCO Capstone In the PASCO Capstone software click the Calibration icon in the Tools palette to open the Calibration panel Calibration CT Choose the type of measurement you would like to Hardware NE calibrate Setup iy Conductivity Data Summary Back Next k Calibration Calculator 012 09688B 3 Conductivity Sensor e In Step 1 the measurement of Conductivity is auto matically selected Click Next to open the second step calibrate Conductivity 2 choose the probes you would like to calibrate now Conductivity Measurements E Conductivity Sensor Ch P1 E Conductivity 10X Probe E Conductivity 1X Probe Back Next Cancel e In Step 2 chose what to calibrate Click the check box next to Conductivity Sensor Then click Next to open the third step 3 Choose the type of calibration you would like to perform Two Standards 2 point One Standard 1 point offset One Standard 1 point slope Restore Factory Calibration Review Current Calibration Back Next Cancel e In Step
11. uS em First touch Conductivity Sais 10X Probe to select it Conductivity 1X Probe PASCO 2 uS cm Then touch Show A graph display of Conductivity and Time opens Touch the Experiment Tools icon in the lower right corner OC e PBB AE a 5 30000 uS cm 20000 l X Probe A Lor WO NINANI NS 000 Touch 5000 et Experiment Tools gt E 2 A Conc A A AA A A LICI LILI TI ed The Experiment Tools screen opens Touch Calibrate Sensor to select that choice and then touch OR Experiment Tools Manage Data First touch Calibrate Sensor to select it for elt ELT EDELE Data Properties Then touch OK Measurement Map The Calibrate Sensor Select Measurement screen opens and the default selections are Conductivity 10X FASC Qi Appendix Calibration Probe uS cm as the Measurement and 1 point Adjust Slope Only as the Calibration Type Touch NEXT Calibrate Sensor Select Measurement Sensor Conductivity Sensor Measurement Conductivity 10X Probe pS cm Calibration Type 1 point Adjust Slope Only Cancel The Calibrate Sensor Enter Values screen shows the Calibration Point 2 menu Calibrate Sensor Enter Values gt Calibration Point 1 W Calibration Point 2 Standard Value 1000 0 pS cm Sensor Va
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