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See the Vernier web site www vernier com calc software index html for more information on the App and Program Transfer Guidebook DataMate program Use DataMate with LabPro or CBL 2 and TI 73 TI 83 TI 84 TI 86 TI 89 and Voyage 200 calculators See the LabPro and CBL 2 Guidebooks for instructions on transferring DataMate to the calculator Data Pro This program is used with LabPro and a Palm handheld LabVIEW National Instruments LabVIEW software is a graphical programming language sold by National Instruments It is used with SensorDAQ and can be used with a number of other Vernier interfaces See www vernier com labview for more information pH Sensor Order Code PH BTA Our pH Sensor can be used for any lab or demonstration that can be done with a traditional pH meter This sensor offers the additional advantages of automated data collection graphing and data analysis Typical activities using our pH sensor include studies of household acids and bases acid base titrations monitoring pH change during chemical reactions or in an aquarium as a result of photosynthesis investigations of acid rain and buffering and investigations of water quality in streams and lakes Collecting Data with the pH Sensor This sensor can be used with the following interfaces to collect data Vernier LabQuest as a standalone device or with a computer Vernier LabQuest Mini with a computer Vernier LabPro with a computer TI graphing calculator or Palm handheld Vernier Go Link Vernier EasyLink Vernier SensorDAQ CBL 2 Here is the general procedure to follow when using the pH Sensor 1 Connect the pH Sensor to the interface 2 Start the data collection software1 3 The software will identify the pH Sensor and load a default data collection setup You are now ready to collect data Important Do not fully submerge the sensor The handle is not waterproof pH Electrode Specifications Type Response time Temperature range 12 mm OD Range 13 bit Resolution SensorDAQ 12 bit Resolution LabQuest LabQuest Mini Go Link LabPro ULI SBI 10 bit Resolution CBL 2 Isopotential pH Output Stored Calibration Values2 Intercept k0 Slope k1 pH 0 14 0 0025 pH units 0 005 pH units 0 02 pH units pH 7 point at which temperature has no effect 59 2 mV pH at 25 C 13 720 3 838 NOTE This product is to be used for educational purposes only It is not appropriate for industrial medical research or commercial applications Data Collection Software This sensor can be used with an interface and the following data collection software Logger Pro 3 This computer program is used with LabQuest LabQuest Mini LabPro or Go Link Logger Pro 2 This computer program is used with ULI or Serial Box Interface Logger Lite This computer program is used with LabQuest LabQuest Mini LabPro or Go Link LabQuest App This program is used when LabQuest is used as a standalone device EasyData App This calculator application for the TI 83 Plus and TI 84 Plus can be used with CBL 2 LabPro and Vernier EasyLink We recommend version 2 0 or newer which can be downloaded from the Vernier web site www vernier com easy easydata html and then transferred to the calculator Sealed gel filled epoxy body Ag AgCl 90 of final reading in 1 second 5 to 80 C How the pH Sensor Works The pH Amplifier inside the handle is a circuit which allows a standard combination pH electrode such as the Vernier 7120B to be monitored by a lab interface The cable from the pH Amplifier ends in a BTA plug The pH Sensor will produce a voltage of 1 75 volts in a pH 7 buffer The voltage will increase by about 0 25 volts for every pH number decrease The voltage will decrease by about 0 25 volts pH number as the pH increases The Vernier gel filled pH Sensor is designed to make measurements in the pH range of 0 to 14 A polycarbonate body that extends below the glass sensing bulb of the 2 1 If you are using Logger Pro 2 with either a ULI or SBI the sensor will not auto ID Open an experiment file for the pH Sensor in the Probes Sensors folder These are average calibration values Actual values may vary because sensors are individually calibrated by Vernier before shipping 2 electrode makes this probe ideal for the demands of a middle school high school or university level science class or for making measurements in the environment The gel filled reference half cell is sealed it never needs to be refilled This sensor is equipped with circuitry that supports auto ID When used with LabQuest LabQuest Mini LabPro Go Link SensorDAQ EasyLink or CBL 2 the data collection software identifies the sensor and uses pre defined parameters to configure an experiment appropriate to the recognized sensor Preparing for Use To prepare the electrode to make pH measurements follow this procedure Remove the storage bottle from the electrode by first unscrewing the lid then removing the bottle and lid Thoroughly rinse the lower section of the probe especially the region of the bulb using distilled or deionized water When the probe is not being stored in the storage bottle it can be stored for short periods of time up to 24 hours in pH 4 or pH 7 buffer solution It should never be stored in distilled water Connect the pH Sensor to your lab interface load or perform a calibration as described in the next section and you are ready to make pH measurements Note Do not completely submerge the sensor The handle is not waterproof When you are finished making measurements rinse the tip of the electrode with distilled water Slide the cap onto the electrode body then screw the cap onto the storage bottle Note When the level of storage solution left in the bottle gets low you can replenish it with small amounts of tap water the first few times you use the probe but not indefinitely A better solution is to prepare a quantity of pH 4 buffer KCl storage solution see the section on Maintenance and Storage and use it to replace lost solution Do I Need to Calibrate the pH Sensor We feel that you should not have to perform a new calibration when using the pH Sensor for most experiments in the classroom We have set the sensor to match our stored calibration before shipping it You can simply use the appropriate calibration file that is stored in your data collection program from Vernier in any of these ways 1 If you ordered the PH BTA version of the sensor and you are using it with a LabQuest LabQuest Mini LabPro or CBL 2 interface then a calibration in pH is automatically loaded when the pH Sensor is connected Note Each pH Sensor PH BTA version is calibrated at Vernier This custom

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