PASCO Specialty & Mfg. PASPORT PS-2102 User's Manual
Contents
1. PASCOE 800 772 8700 www pasco com pH Sensor PS 2102 Removing the Storage Bottle 1 Hold the electrode vertically so that the solution will not spill out of the bottle em Bf soe Removing the bottle 2 Unscrew and remove bottle Keep the storage solution for later use 3 Push the bottle cap up the electrode shaft to keep it out of the way Collecting Data 1 Rinse the electrode with distilled water 2 Immerse the end of the electrode in the solution to be mea sured The bulb shaped glass membrane should be entirely immersed 3 Press or click the start button to begin recording data 4 Wait for the reading to stabilize 5 Rinse the electrode again before placing it in another solu tion Calibration Calibration is not always necessary especially if you are interest ing in measuring a change in pH rather than absolute pH values For accurate measurements first calibrate the sensor You will need two different buffer solutions pH 4 and pH 7 in this exam ple and distilled water The solutions should be at the same tem perature as the solutions that you will measure later The calibration procedure varies depending on which software or datalogger you are using For more specific instructions see the documentation for your software or datalogger 1 Open the calibration window or screen In DataStudio click Setup then click Calibrate Sensors 2 Select the 2 Point calibration2. 3800 worldwide 800 772 8700 U S Fax 916 786 7565 Web Wwww pasco com Email support pasco com For more information about the pH Sensor and the latest revision of this Instruction Sheet visit www pasco com go PS 2102 Limited Warranty For a description of the product warranty see the PASCO catalog Copyright The PASCO scientific 012 07308G pH Sensor Instruction Sheet is copyrighted with all rights reserved Permis sion is granted to non profit educational institutions for reproduction of any part of this manual providing the reproductions are used only in their labo ratories and classrooms and are not sold for profit Reproduction under any other circumstances without the written consent of PASCO scientific is prohibited Trademarks PASCO PASCO scientific and PASPORT are trademarks or registered trademarks of PASCO scientific in the United States and or in other countries All other brands products or ser vice names are or may be trademarks or service marks of and are used to identify products or services of their respective owners For more infor mation visit www pasco com legal IZEIA
3. PASJE Instruction Sheet 012 07308G pH Sensor PS 2102 Included Parts 1 pH amplifier 2 pH electrode 3 Storage bottle containing storage solution Additional Part Required e PASPORT interface or datalogger Related Parts e Replacement electrode PASCO part 699 195 e Flat surface electrode PS 2182 e pH buffer set SC 2321 Quick Start 1 Connect the amplifier to your PASPORT interface 2 Connect the pH electrode to the amplifier 3 Ifyou are using a computer connect the PASPORT interface to it and start DataStudio 4 Remove the storage bottle from the electrode 5 Rinse the electrode with distilled water 6 Immerse the end of the electrode in the solution to be mea sured 7 Press or click the start button to begin recording data Introduction The pH Sensor measures the pH of a solution The measurement is recorded and displayed by the connected computer or datalog ger The pH Sensor is well suited for continuous recording and discrete measurements Set up Connecting the Parts 1 Plug the sensor s PASPORT connector into any port of a PASPORT interface or datalogger 2 Push the connector at the end of the electrode cable onto the sensor s electrode connector Twist the connector to lock it in place Y to PASPORT interface pH electrode G Connecting the electrode and interface 3 Ifyou are using a computer connect the PASPORT interface to it and start DataStudio
4. hylene dinitric tetra acidic acid EDTA tetrasodium solution e If the electrode is contaminated with oil or grease wash the electrode in a mild detergent or solvent known to be effective for the particular film e Ifthe electrode is not responding quickly soak the elec trode alternately in 12 M NaOH sodium hydroxide and 1 M HCI hydrogen chloride Leave it in each solution for one minute Rinse completely between soakings and end with HCl 2 Soak the electrode in 0 1 M hydrochloric acid HCI for 15 minutes 3 Soak the electrode in a pH 7 buffer solution for 30 minutes If the restoring procedure fails to improve the response of the electrode replace the electrode Replacement and Alternative Electrodes e Fora replacement electrode purchase PASCO part 699 195 e A flat surface electrode part PS 2182 is also available The pH Sensor is compatible with other combination pH electrodes that have BNC connectors IZEIA pH Sensor PS 2102 Specifications pH Amplifier Maximum sampling rate 50 samples s pH Range 0 to 14 probe dependent Accuracy 0 1 after calibration Resolution 0 005 Repeatability 0 02 pH Electrode Type Gel filled Ag AgCl combination electrode Connector BNC Technical Support For assistance with any PASCO product contact PASCO at Address PASCO scientific 10101 Foothills Blvd Roseville CA 95747 7100 Phone 916 786
5. type 3 Rinse the electrode with distilled water 4 Place the electrode in pH 4 buffer solution Wait for the read ing to stabilize 5 Click or select Read for the first calibration point 6 Remove the electrode from the solution and rinse it with dis tilled water 7 Place the electrode in pH 7 buffer solution Wait for the read ing to stabilize 8 Click or select Read for the second calibration point Electrode Maintenance Electrode Storage For a storage period of a few weeks or less rinse the electrode with distilled water and place it in the storage bottle filled with storage solution To make storage solution combine equal parts 4 M potassium chloride KCI and pH 4 buffer solution with a few drops of pH buffer preservative buffer preservative is optional You may keep the electrode in the storage solution indefinitely but for long term storage PASCO recommends storing the elec trode dry After dry storage the electrode must be restored see below to rehydrate the glass membrane Restoring the Electrode Follow this procedure to improve the response of a slow elec trode or to rehydrate the membrane after dry storage 1 Clean the membrane using one or more of these methods e Ifthe electrode is contaminated with proteins soak the electrode in a solution of 1 pepsin in 0 1 Molar hydro chloric acid HCI e Ifthe electrode is contaminated with inorganic deposits rinse the electrode with 0 1 M et
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