Hanna Instruments BL 7916, BL 7917 User's Manual
Summary
This technical guide provides essential information for operating Hanna Instruments automated dosing pumps. Designed for chemists, environmental scientists, and laboratory professionals, this manual covers everything from initial installation and calibration procedures to advanced maintenance and troubleshooting. Learn how to accurately measure, dispense, and manage chemicals safely, ensuring reliable performance in critical applications like pH and ORP monitoring.
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Instruction Manual
BL 7916 • BL 7917 p H and ORP Measuring & Dosing System
Page Summary Contents For Hanna Instruments BL 7916, BL 7917 User's Manual
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Instruction Manual BL 7916 • BL 7917 p H and ORP Measuring & Dosing System
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Dear Customer, PRELIMINARY EXAMINATION Thank you for choosing a Hanna product. Please read this instruction manual carefully before using the pump. Remove the pump from the packing material and examin...
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These are best tightened with an open end or crescent wrench. Avoid FLOW RATE CHART overtightening these parts as this could cause damage to the seats and threads. If a hose is used, it should be secu...
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FUNCTIONAL DESCRIPTION BL 7916 FUNCTIONAL DESCRIPTION BL 7917 1. Discharge Valve Assembly 1. Discharge Valve Assembly 2. Pump head 2. Pump head 3. Suction Valve Assembly 3. Suction Valve Assembly 4. H...
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SPECIFICATIONS VALVE / HOSE ASSEMBLY DIAGRAM BL 7916D BL 7916U Range 0.00 to 14.00 p H Resolution 0.01 p H Accuracy (@20°C/68°F) ±0.01 p H Typical EMC Deviation ±0.1 p H Input Impedance 10¹² Ohm Dosag...
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MECHANICAL DIMENSIONS INSTALLATION The Controller/Pump series of instruments are enclosed in a modular Materials Needed housing for maximum protection. The dimensioned illustrations show LDPE hose (7 ...
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To ensure maximum performance, check the voltage at the point of Probe connections supply to verify that it is sufficient. It is recommended that you install a Connect the p H/ORP electrode to the BNC...
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Hose Connections Repeat the same installation procedure for the hose connections Cut a long enough section of the on the discharge end with the injection assembly (HI 721004) hose to reach the suction...
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EXAMPLE OF TYPICAL INSTALLATIONS Downhill Installation Suggested installation when pumping from one container to another, HOSE PIPE each at different levels and with only nominal pressure. PUMP CONNEC...
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OPERATIONAL GUIDE Unscrew and remove the transparent front panel cover and gasket seal for access to the terminals. TERMINAL CONNECTIONS BL 7917 Pt100 (for BL 7916 only) A 2-wire Pt100 can be connecte...
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For example, a level controller can be placed in the tank of the liquid SETPOINT ADJUSTMENTS being dosed so that the pump is stopped when the chemicals are Move the display selector switch to SET. exh...
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p H CALIBRATION TROUBLESHOOTING GUIDE BL 7916 only: ELECTRICAL Ensure that the display selector switch is set to MEASURE and dip The pump does not operate when turned ON: the electrode tip in a neutra...
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Leakage at the connections: SCHEDULED MAINTENANCE Be sure that the hose is fully seated and hose connectors are After 50 hours tight. Tight the pump head screws with a torque force of 2.5 Nm (22"...
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These bubbles can be removed by "shaking down" the electrode as ELECTRODE CONDITIONING you would do with a glass thermometer. AND MAINTENANCE If the bulb and/or junction are dry, soak the el...
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For refillable electrodes**: Slow Response/Excessive Drift: Soak the tip in Hanna Solu- Refill the electrode with fresh electrolyte (HI 7071 for single junction or tion HI 7061 for 30 minutes, rinse t...
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Reducing pretreatment: immerse the electrode in HI 7091 solution for TAKING REDOX MEASUREMENTS a few minutes. Oxidizing pretreatment: immerse the electrode in HI 7092 solution for Redox measurements a...
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Hydrogen Sulfide Aqueous Silver Nitrate CHEMICAL COMPATIBILITY GUIDE Solution Silver Plating Solutions Hypochlorous Acid Soaps Kerosene Sodium Acetate Lactic Acid Sodium Bicarbonate PARTIAL LISTING OF...
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HI 721101 Pump head, O-Ring, 6 screws and washers ACCESSORIES HI 721106 Pump head, Large PTFE Diaphragm, Aluminum SPARE PARTS Piston and Aluminum Disk HI 721102 Discharge Valve (Glass Ball, Valve O-Ri...
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HI 7077L Oil & Fat cleaning solution, 500 m L bottle HI 3130B/3 BNC connector, 3 m (9.9') cable, Pt, glass-body with HI 7071 3.5M KCl+Ag Cl electrolyte solution, 4x50 m L, for external thread sing...
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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 instrumen...
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SALES AND TECHNICAL SERVICE CONTACTS Australia: Tel. (03) 9769.0666 • Fax (03) 9769.0699 China: Tel. (10) 88570068 • Fax (10) 88570060 Egypt: Tel. & Fax (02) 2758.683 Germany: Tel. (07851) 9129-0 ...
Manual Details
| Brand | Hanna Instruments |
|---|---|
| Pages | 21 |
| File Size | 1005.01 KB |
| Published | May 21, 2026 |
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Frequently Asked Questions
What should I do before operating the pump?
Read this instruction manual carefully and check that the installation voltage matches the label on the back of the pump.
How is the pump protected from electrical issues?
Each pump is protected by a 1 A/250 V fuse, with one spare located in the drawer under the power socket.
What should I use for chemical dosing setup?
Always ensure all tubes are securely attached to the fittings and avoid using pipe wrenches or pliers on plastic parts.
How can I void my warranty claim?
Damages due to accident, misuse, tampering, or lack of prescribed maintenance are not covered by the standard warranty.