Hanna Instruments pH 21 Instruction Manual Download Page 1 | Manualshive

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pH20 • pH21

Basic pH meters

Instruction Manual

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Summary of Contents for pH 21

Page 1: ...pH20 pH21 Basic pH meters Instruction Manual w w w h a n n a i n s t c o m...

Page 2: ...struction manual carefully before using the instru ment This manual will provide you with all the necessary information for the correct use of the instrument as well as a precise idea of its versatili...

Page 3: ...EAR PANEL 1 BNC connector for pH or ORP pH 21 only electrode 2 Temperature probe socket for use with the HI 7662 3 Power supply input Plug the 12 Vdc adapter into the DC socket then into the mains Not...

Page 4: ...nking The LCD will show the ORP mV value TAKING pH MEASUREMENTS Make sure that the instrument has been calibrated for pH before taking measurements see pH Calibration section for details Connect the s...

Page 5: ...H 10 01 buffer solution The meter automatically recognizes the buffer and displays the correct value After measurements turn the meter off by pressing the ON OFF key disconnect the power adapter from...

Page 6: ...roken insulation on the cable or cracks on the electrode stem or bulb If any scratches or cracks are present replace the electrode Rinse off any salt deposits with water Connectors must be perfectly c...

Page 7: ...ectrodes HI 8071 3 5M KCl AgCl electrolyte 4 x 30 mL for single junction electrodes FDA approved bottle HI 7072 1M KNO3 electrolyte 4 x 30 mL CLEANING PROCEDURE General Soak in HI7061 General Cleaning...

Page 8: ...s HI 8082 3 5M KCl electrolyte 4 x 30 mL for double junction electrodes FDA approved bottle ORP SOLUTIONS HI 7091M Reducing pretreatment solution 230 mL bottle HI 7091L Reducing pretreatment solution...

Page 9: ...2 Japan Tel 03 3258 9565 Fax 03 3258 9567 Korea Tel 02 2278 5147 Fax 02 2264 1729 Malaysia Tel 603 5638 9940 Fax 603 5638 9829 Singapore Tel 6296 7118 Fax 6291 6906 SouthAfrica Tel 011 615 6076 Fax 01...

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