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Thermo Fisher Scientific

Environmental Instruments

Water Analysis Instruments  

166 Cummings Center

Beverly, MA 01915 USA

Tel: 978-232-6000

Toll Free: 800-225-1480

Dom. Fax: 978-232-6015

Int’l. Fax: 978-232-6031

www.thermo.com/water

User Guide

Refillable Ag/AgCl  

pH Electrodes

Summary of Contents for 9101BN

Page 1: ...User Guide Refillable Ag AgCl pH Electrodes...

Page 2: ......

Page 3: ...odes Refillable Ag AgCl pH electrodes include a wide selection of electrode shapes and sizes for measuring a variety of samples These reliable electrodes are built for everyday use Sure Flow Refillabl...

Page 4: ...w cap connector 9157BNMD Refillable Ag AgCl pH ATC Triode with epoxy body and waterproof BNC and 8 pin MiniDIN connectors 9157BN Refillable Ag AgCl pH ATC Triode with epoxy body and BNC and 8 pin DIN...

Page 5: ...dy semi micro tip and BNC connector 9256BN PerpHecT refillable Ag AgCl combination pH electrode with epoxy body and BNC connector 9272BN PerpHecT Sure Flow refillable Ag AgCl combination pH electrode...

Page 6: ...specific meters refer to the list below 2 Thermo Scientific Orion refillable Ag AgCl pH electrode The 9157BNMD pH ATC Triode has a temperature connector that is compatible with the Star Series pH met...

Page 7: ...s article How to Measure pH in Mixed and Nonaqueous Solutions and for additional information on non aqueous pH measurements The refillable Ag AgCl electrodes contain a silver silver chloride Ag AgCl...

Page 8: ...g solution must always be above the reference junction and at least one inch above the sample level The filling hole should be open whenever the electrode is in use 4 Place the electrode in an electro...

Page 9: ...e the sample level The filling hole should be open whenever the electrode is in use 4 Wet the junction by pressing down on the electrode cap to let a few drops of the filling solution flow out of the...

Page 10: ...reduce the chance of error due to polarization avoid rubbing or wiping the electrode bulb Use a lint free tissue and gently blot the electrode bulb If the electrode is used in dirty or viscous sample...

Page 11: ...hole should be uncovered Fresh pH buffer Stir all samples and buffers Filling solution level must be higher than sample level Reference junction must be immersed Place insulation between stirrer and b...

Page 12: ...ion is recommended 3 Prepare the meter according to the meter user guide 4 Rinse the electrode first with distilled water and then with the buffer being used for calibration 5 Place the electrode into...

Page 13: ...ffer When the reading is stable set the meter to the pH value of the buffer at the measured temperature Refer to the meter user guide for a detailed procedure Table 1 provides pH values at various tem...

Page 14: ...ll solution cover the fill hole whenever the electrode is being stored and open the fill hole when calibrating and measuring Long term Storage more than one week Fill the reference chamber and securel...

Page 15: ...oderate to fast rate 2 Drain the reference chamber and refill it with fresh filling solution 3 Soak the electrode in pH electrode storage solution for at least one hour Cleaning Solutions Cat No 90002...

Page 16: ...d sample pH values change with temperature because of their temperature dependent chemical equilibria The pH electrode should be calibrated with buffers that have known pH values at different temperat...

Page 17: ...nt environments Using LogR technology PerpHecT meters sense the temperature directly from the PerpHecT pH electrodes The pH and temperature response is identical and both measurements occur at the sen...

Page 18: ...tions The accuracy values are valid only when the temperature calibration is performed within the stated temperature range The higher temperature range data will apply to measurements made above that...

Page 19: ...values less than 12 When measuring at pH values greater than 12 add the correction value from the nomograph below to the observed pH reading 10 11 12 13 80 70 60 50 40 30 C 20 0 1 M 25 0 5 M 1 M 2 M...

Page 20: ...er and then insert the electrode into fresh pH 7 buffer 4 When the reading is stable record the mV value of the pH 7 buffer The mV value should be 30 to 30 mV 5 Rinse the electrode with distilled wate...

Page 21: ...res Review calibration and measurement sections to be sure proper technique has been followed Assistance After troubleshooting all components of your measurement system contact Technical Support Withi...

Page 22: ...n B includes 4 x 15 mL bottles pipette and beaker 900023 pH cleaning solution C includes 4 x 15 mL bottles pipette and beaker 900024 pH cleaning solution D includes 4 x 15 mL bottles pipette and beake...

Page 23: ...ific Environmental Instruments Water Analysis Instruments 166 Cummings Center Beverly MA 01915 USA Tel 978 232 6000 Toll Free 800 225 1480 Dom Fax 978 232 6015 Int l Fax 978 232 6031 www thermo com wa...

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