Hanna Instruments BL 7916 Instruction Manual
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Hanna Instruments BL 7916 Instruction Manual

Ph and orp controller & dosing pump
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Enlarged version
Instruction Manual
BL 7916 - BL 7917
pH and ORP
Controller &
Dosing Pump
These Instruments are in
Compliance with the CE Directives
h t t p : / / w w w . h a n n a c a n . c o m

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Summary of Contents for Hanna Instruments BL 7916

  • Page 1 Instruction Manual BL 7916 - BL 7917 pH and ORP Controller & Dosing Pump These Instruments are in Compliance with the CE Directives h t t p : / / w w w . h a n n a c a n . c o m...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS PRELIMINARY EXAMINATION ............3 GENERAL DESCRIPTION ..............4 FLOW RATE CHART ............... 5 FUNCTIONAL DESCRIPTION BL 7916 ..........6 FUNCTIONAL DESCRIPTION BL 7917 ..........7 SPECIFICATIONS................8 VALVE / HOSE ASSEMBLY DIAGRAM..........9 MECHANICAL DIMENSIONS ............10 INSTALLATION ................

  • Page 3: Preliminary Examination

    PRELIMINARY EXAMINATION PRELIMINARY EXAMINATION PRELIMINARY EXAMINATION PRELIMINARY EXAMINATION PRELIMINARY EXAMINATION Remove the pump from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If there is any noticeable damage, notify your Dealer. Each pump is supplied complete with: •...

  • Page 4: General Description

    • A solenoid-driven pump • Automatic overheat protection and a built-in LCD display • Alarm output: the alarm of the BL 7916 will be activated if the measured pH value is 2 pH units higher or lower than the setpoint. BL7917's alarm will activate if the mV value is 200mV higher or lower than the setpoint.

  • Page 5: Flow Rate Chart

    The table below shows typical reduction of the flow rate with an increase of pressure. The pump supplied with the system has a capacity of 13.3 LPH (3.5 GPH) at 0.5 BAR (7.4 PSI). BL 7916 / BL 7917 FLOW / PRESSURE BAR (PSI) LPH (GPH) 0.5 (7.4)

  • Page 6: Functional Description Bl 7916

    FUNCTIONAL DESCRIPTION BL 7916 FUNCTIONAL DESCRIPTION BL 7916 FUNCTIONAL DESCRIPTION BL 7916 FUNCTIONAL DESCRIPTION BL 7916 FUNCTIONAL DESCRIPTION BL 7916 1. Discharge Valve Assembly 2. Pump head 3. Suction Valve Assembly 4. Hose 5. Liquid Crystal Display 6. Offset Calibration Trimmer 7.

  • Page 7: Functional Description Bl 7917

    FUNCTIONAL DESCRIPTION BL 7917 FUNCTIONAL DESCRIPTION BL 7917 FUNCTIONAL DESCRIPTION BL 7917 FUNCTIONAL DESCRIPTION BL 7917 FUNCTIONAL DESCRIPTION BL 7917 1. Discharge Valve Assembly 2. Pump head 3. Suction Valve Assembly 4. Hose 5. Liquid Crystal Display 6. Setpoint Adjustment Trimmers (FINE and COARSE) 7.

  • Page 8: Specifications

    SPECIFICATIONS SPECIFICATIONS SPECIFICATIONS SPECIFICATIONS SPECIFICATIONS BL7916D BL7916U 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 Input High Impedance 10¹² Ohm Dosage Proportional: acid or basic. User selectable Dosing Contact Isolated, 2A, Max. 240V, resistive load, 1,000,000 strokes Alarm Contact Isolated, 2A, Max.

  • Page 9: Valve / Hose Assembly Diagram

    VALVE / HOSE ASSEMBLY DIAGRAM VALVE / HOSE ASSEMBLY DIAGRAM VALVE / HOSE ASSEMBLY DIAGRAM VALVE / HOSE ASSEMBLY DIAGRAM VALVE / HOSE ASSEMBLY DIAGRAM NECK...

  • Page 10: Mechanical Dimensions

    M E C H A N I C A L D I M E N S I O N S M E C H A N I C A L D I M E N S I O N S M E C H A N I C A L D I M E N S I O N S M E C H A N I C A L D I M E N S I O N S M E C H A N I C A L D I M E N S I O N S...

  • Page 11: Installation

    I N S T A L L A T I O N I N S T A L L A T I O N I N S T A L L A T I O N I N S T A L L A T I O N I N S T A L L A T I O N Materials Needed •...
  • Page 12 To ensure maximum performance, check the voltage at the point of supply to verify that it is sufficient. It is recommended that you install a 1 Amp circuit breaker between the pump and the power supply. This will give additional protection to the internal circuit and provide a convenient way to disconnect the power supply prior to servicing the pump, if needed.
  • Page 13 Probe connections Connect the pH/ORP electrode to the BNC socket of the pump. Permanent Connection using 3/8" PVC pipe All piping for the pump feed and dis- charge should be plumbed to the location NION ONNECTION of the pump. DAPTER The threads on both valve assemblies ISCHARGE ALVE...
  • Page 14 Hose Connections • Cut a long enough section of the hose to reach the suction valve of the pump head from the feed tank. Allow some slack in the hose and be sure it is not kinked or twisted. • Slip a hose connector onto the hose over the head valve and up to the bottom of the threads ensuring it is fully seated.
  • Page 15 • Repeat the same installation procedure for the hose connections on the discharge end with the injection assembly (HI721004). • Secure the hose so that its movement is minimized when the pump is operating. Excessive hose movement could cause the connectors to loosen and result in leakage.
  • Page 16 EXAMPLE OF TYPICAL INSTALLATIONS HOSE PIPE PUMP CONNECTION FILTER / RESEVOIR FOOT VALVE MANUAL CHECK VALVE SHUTOFF VALVE LEGEND 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-priming problems, especially with high viscosity liquids.
  • Page 17 Downhill Installation Suggested installation when pumping from one container to another, each at different levels and with only nominal pressure. START-UP At start-up, purge all chemical gases and air from the suction tubing, valves and pump head. Start the pump. When all the air or gas is vented, the solution being metered will appear in the output line.

  • Page 18: Operational Guide

    • Unscrew and remove the transparent front panel cover and gasket seal for access to the terminals. • Remove the protective plastic plate covering the terminals by removing the 2 screws on both sides of the plate. TERMINAL CONNECTIONS BL 7916...
  • Page 19 With this value the 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.
  • Page 20 The contact is rated at 2 amps at 220VAC. No power is supplied through the system and it is an open/closed contact only. With BL 7916, the contact can be selected to be closed when the alarm is activated and open when the alarm is off or viceversa. Short the middle terminal located on the driving circuit inside the controller section with the NO or NC terminal (see above).
  • Page 21 • Adjust the SET FINE trimmer to display the exact setpoint value. • Once the desired setpoint is achieved, move the display selector switch back to MEASURE. ACID OR BASE SELECTION (BL 7916 only) If an acid chemical is to be dosed, move the ACID/BASE switch to ACID. This means that the pump will dose when pH measurements are higher than the setpoint.

  • Page 22: Ph Calibration

    H CALIBRATION H CALIBRATION H CALIBRATION BL 7916 only: • Ensure that the display selector switch is set to MEASURE and dip the electrode tip in a neutral buffer solution (pH 7.01). • Adjust the OFFSET trimmer to display 7.01 on the LCD.

  • Page 23: Troubleshooting Guide

    TROU BLES HO O TING GUID E TR OU B LESH O OTIN G GUIDE TROUB LE S HO O TING GUIDE TROU BLES HO O TING GUID E TR OU B LESH O OTIN G GUIDE ELECTRICAL The pump does not operate when turned ON: •...

  • Page 24: Maintenance

    Leakage at the connections: • Be sure that the hose is fully seated and hose connectors are tight. • Be sure that valves are tight and O-rings are in place. Leakage around the pump head: • Be sure that the valves are tight and O-rings are in place and the head screws (hex bolts) are tight.
  • Page 25 SCHEDULED MAINTENANCE After 50 hours Tight the pump head screws with a torque force of 2.5 Nm (22" lbf). After 12 months It is recommended to replace HI721102, HI721103 (suction and discharge valves assemblies) as well as the O-rings. The LDPE hose can also deteriorate over time and, for safety reasons, should also be changed with HI720 032.

  • Page 26: Electrode Conditioning And Maintenance

    E L E C T R O D E C O N D I T I O N I N G E L E C T R O D E C O N D I T I O N I N G E L E C T R O D E C O N D I T I O N I N G E L E C T R O D E C O N D I T I O N I N G E L E C T R O D E C O N D I T I O N I N G...
  • Page 27 These bubbles can be removed by "shaking down" the electrode as you would do with a glass thermometer. If the bulb and/or junction are dry, soak the electrode in HI 70300 Storage Solution for at least one hour. For refillable electrodes**: If the refill solution (electrolyte) is more than 2½...
  • Page 28 For refillable electrodes**: Refill the electrode with fresh electrolyte (HI7071 for single junction or HI7082 for double junction electrodes). Allow the electrode to stand upright for 1 hour. Follow the Storage Procedure above. CLEANING PROCEDURE Soak in Hanna HI 7061 General Cleaning Solu- General tion for approximately ½...
  • Page 29 • Slow Response/Excessive Drift: Soak the tip in Hanna Solu- tion HI7061 for 30 minutes, rinse thoroughly in distilled water and then follow the Cleaning Procedure above. • For ORP Electrodes: polish the metal tip with a lightly abrasive paper (paying attention not to scratch the surface) and wash thoroughly with water.

  • Page 30: Taking Redox Measurements

    TAKING REDOX MEASUREMENTS TAKING REDOX MEASUREMENTS TAKING REDOX MEASUREMENTS TAKING REDOX MEASUREMENTS TAKING REDOX MEASUREMENTS Redox measurements allow the quantification of the oxidizing 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 electrons are gained.
  • Page 31 Reducing pretreatment: immerse the electrode for a few minutes in HI 7091. Oxidizing pretreatment: immerse the electrode for a few minutes in HI 7092. If the pretreatment is not performed, the electrode will take signifi- cantly longer to respond. As with pH electrodes, gel-filled redox electrodes are more suitable for industrial applications due to lesser maintenance requirements.

  • Page 32: Chemical Compatibility Guide

    CHEMICAL COMPATIBILITY GUIDE CHEMICAL COMPATIBILITY GUIDE CHEMICAL COMPATIBILITY GUIDE CHEMICAL COMPATIBILITY GUIDE CHEMICAL COMPATIBILITY GUIDE PARTIAL LISTING OF CHEMICALS THAT CAN BE USED WITH BLACKSTONE PUMPS (Rated for 45°C. For higher temperatures consult your dealer or nearest Hanna Customer Service Center) Adipic Acid Caustic Soda Alcohol Amyl...
  • Page 33 Hydrogen Sulfide Aqueous Silver Nitrate Solution Silver Plating Solutions Hypochlorous Acid Soaps Kerosene Sodium Acetate Lactic Acid Sodium Bicarbonate Lard Oil Sodium Bisulfate Lauric Acid Sodium Bisulfite Lead Acetate Sodium Borate Linoleic Acid Sodium Chlorate Linseed Oil Sodium Chloride Lithium Salts Sodium Cyanide Magnesium Carbonate Sodium Fluoride...

  • Page 34: Accessories

    A C C E S S O R I E S A C C E S S O R I E S A C C E S S O R I E S A C C E S S O R I E S A C C E S S O R I E S SPARE PARTS HI 721102 Discharge Valve (Glass Ball, Valve O-Ring, Hose Con-...
  • Page 35 HI 721101 Pump head, O-Ring, 6 screws and washers HI 721106 Pump head, Large Teflon Diaphragm, Aluminum ® Piston and Aluminum Disk PUMP HEAD DIAPHRAGM pH CALIBRATION SOLUTIONS HI7004M pH 4.01 Buffer Solution, 230 mL HI7004L pH 4.01 Buffer Solution, 460 mL HI7006M pH 6.86 Buffer Solution, 230 mL HI7006L...
  • Page 36 HI7073L Protein Cleaning Sol., 460 mL HI7074M Inorganic Cleaning Sol., 230 mL HI7074L Inorganic Cleaning Sol., 460 mL HI7077M Oil & Fat Cleaning Sol., 230 mL HI7077L Oil & Fat Cleaning Sol., 460 mL REFILL ELECTROLYTE SOLUTIONS HI7071 3.5M KCl+AgCl Electrolyte, 4x50 mL, for single junc- tion electrodes HI7072 1M KNO...
  • Page 37 HI 1114S Screw connector, double junction plastic-body HI 1134B/3 BNC connector, 3 m (9.9') cable, double junction Ultem -body with external thread ® 3/4 x 16 UNF DIA 12mm M13 x 1.5 DIA 20.5mm 38.5mm 110mm HI 1114S HI 1134B/3 HI 1115S Screw connector, single junction, refillable with side- arm, glass-body...
  • Page 38 HI 2114B/5 BNC connector, 5 m (16.5') cable, double junction, Ultem -body with external thread and cloth junction ® 3/4 x 16 UNF DIA 12mm DIA 20.5mm 38.5mm 110mm HI 2910B/5 BNC connector, 5 m (16.5') cable, double junction, Ultem -body with built-in amplifier and cloth junction ®...
  • Page 39 HI 3115S Screw connector, single junction, Pt, refillable with side-arm, glass-body HI 3135B/3 BNC connector, 3 m (9.9') cable, single junction, Pt, refillable with side-arm, glass-body M13 x 1.5 HI 3115S HI 3135B/3 HI 3210T Screw connector, external PG13.5 thread, double junc- tion, Pt, Ultem -body ®...
  • Page 40 HI 4932B/5 BNC connector, 5 m (16.5') cable, double junction, Au, Ultem -body with built-in amplifier and external ® thread 3/4 x 16 UNF DIA 12mm DIA 20.5mm 38.5mm 110mm OTHER ACCESSORIES ChecktempC Stick Thermometer (range -50.0 to 150.0°C) ChecktempF Stick Thermometer (range -58.0 to 302°F) HI 8614 pH Transmitter HI 8614L...

  • Page 41: Warranty

    W A R R A N T Y W A R R A N T Y W A R R A N T Y W A R R A N T Y W A R R A N T Y All Hanna Instruments pumps are warranted for one year against defects in workmanship and materials when used for their intended purpose and maintained according to instructions.

  • Page 42: Other Products From Hanna

    OTHER PRODUCTS FROM HANNA OTHER PRODUCTS FROM HANNA OTHER PRODUCTS FROM HANNA OTHER PRODUCTS FROM HANNA OTHER PRODUCTS FROM HANNA • CABLES AND CONNECTORS • CALIBRATION AND MAINTENANCE SOLUTIONS • CHEMICAL TEST KITS • CHLORINE METERS • CONDUCTIVITY/TDS METERS • DISSOLVED OXYGEN METERS •...

  • Page 43: Ce Declaration Of Conformity

    CE DECLARATION OF CONFORMITY CE DECLARATION OF CONFORMITY CE DECLARATION OF CONFORMITY CE DECLARATION OF CONFORMITY CE DECLARATION OF CONFORMITY Recommendations for Users Before using these products, make 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 44 HANNA LITERATURE HANNA LITERATURE HANNA LITERATURE HANNA LITERATURE HANNA LITERATURE POOLS & SPAS WATER ANALYSIS HANDBOOK ENVIROCARE GENERAL CATALOG These and many others catalogs, handbooks and leaflets are avail- able from Hanna. To receive your free copy, contact your dealer or the nearest Hanna Customer Service Center.

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Bl 7917

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