Hanna Instruments BL 7917 Instruction Manual Download

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Instruction Manual

BL 7916 • BL 7917

pH and ORP

Measuring & Dosing

System

w w w . h a n n a i n s t . c o m

Summary of Contents for BL 7917

Page 1: ...Instruction Manual BL 7916 BL 7917 pH and ORP Measuring Dosing System w w w h a n n a i n s t c o m...

Page 2: ...near chemical dosing pumps When pumping chemicals make sure all tubes are securely attached to the fittings It is recommended that tubing is shielded to prevent possible injury in case of rupture or a...

Page 3: ...ch of children and pets All pumps undergo stringent tests to ensure that they comply with their stated specifications and are calibrated at the maximum rated pressure GENERAL DESCRIPTION The BL 7916 a...

Page 4: ...P electrode 11 Overheating LED 12 Power Socket and Fuse Holder 13 Cable Glands FUNCTIONAL DESCRIPTION BL 7916 1 Discharge Valve Assembly 2 Pump head 3 Suction Valve Assembly 4 Hose 5 Liquid Crystal Di...

Page 5: ...142 x 181 mm 8 7 x 5 6 x 7 1 Weight Approximately 5 kg 11 lb Range 0 00 to 14 00 pH Resolution 0 01 pH Accuracy 20 C 68 F 0 01 pH Typical EMC Deviation 0 1 pH InputImpedance 10 Ohm Dosage Proportional...

Page 6: ...r permanent installation The pump can be mounted directly on a wall or tank see page 10 for the specific mounting dimensions Power Requirements BlackStone pumps are designed to operate to specificatio...

Page 7: ...should be protected from direct exposure to outdoor elements direct sun light rain extreme temperatures high humidity etc Generally speaking the shorter the suction distance the more efficient the pu...

Page 8: ...nd discharge valves located on the pump head should not be inter changed as they are different internally The discharge valve is fitted with a valve guide and will not function properly if used on the...

Page 9: ...INSTALLATIONS Flooded Suction Installation Suggested Installation for consis tent output when using a low stroke rate Also suggested for highly viscous chemicals A slight suction pressure avoids self...

Page 10: ...pump works at 100 of the rating when the difference between measure and setpoint is more than 150 mV BL 7917 or 1 5 pH BL 7916 It goes into proportional dosing for values less than the above You can...

Page 11: ...ump is stopped when the chemicals are exhausted MANUAL An auxiliary switch can be connected to these terminals to force the unit to pump whatever value is measured by the controller This might be need...

Page 12: ...nk This vertical distance should not exceed 1 5 meters 5 feet Either lower the pump or raise the feed tank Check the pump head suction and discharge valves for blockage Pump flow rate is reduced Check...

Page 13: ...Remove the valves from the pump head the injection fitting and the feed Keep the suction and discharge valves separated as they are not interchangeable Disassemble each valve and clean it with a neutr...

Page 14: ...constantly in a well filled with the sample stream or tank When not in use replace the solution in the protective cap with a few drops of HI 70300 storage solution Follow the Preparation Procedure ab...

Page 15: ...he cleaning procedures rinse the electrode thoroughly with distilled water drain and refill the reference chamber with fresh electrolyte not necessary for gel filled electrodes and soak the electrode...

Page 16: ...or reducing power of a solution and are commonly expressed in mV Oxidation may be defined as the process during which a molecule or an ion loses electrons and reduction as the process by which electr...

Page 17: ...thane Tetraethyl Lead Tetralin Tin Salts Vegetable Oils Vinegar Water Acid Mine Water Fresh Water Distilled Water Salt Whiskey Wines Zinc Chloride Zinc Sulfate Adipic Acid Alcohol Amyl Alcohol Diaceto...

Page 18: ...L Oxidizing pretreatment solution 500 mL MAINTENANCE SOLUTIONS HI 70300M Storage solution 230 mL botte HI 70300L Storage solution 500 mL bottle HI 7061M General cleaning solution 230 mL botte HI 7061L...

Page 19: ...5M KCl AgCl electrolyte solution 4x50 mL for single junction electrodes HI 7072 1M KNO3 electrolyte solution 4x50 mL HI 7082 3 5M KCl electrolyte solution 4x50 mL for double junction electrodes RECOMM...

Page 20: ...e sure that they are entirely suitable for the environ ment in which they are used Operation of these instruments in residential areas could cause unacceptable interfer ence to radio and TV equipment...

Page 21: ...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...