Instruction Manual BL 7916 • BL 7917 pH and ORP Measuring & Dosing System w w w . h a n n a i n s t .
Dear Customer, Thank you for choosing a Hanna product. Please read this instruction manual carefully before using the pump. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com. These instruments are in compliance with the directives. WARRANTY 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.
These are best tightened with an open end or crescent wrench. Avoid overtightening these parts as this could cause damage to the seats and threads. If a hose is used, it should be securely fastened to columns, walls, braces, etc. This will ensure that the hose connection will remain tight and leak free. Shield the hose from direct sunlight. Sunlight can cause an autocatalytic reaction with some chemicals and weaken the hose walls.
FUNCTIONAL DESCRIPTION BL 7916 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
SPECIFICATIONS BL 7916D Range VALVE / HOSE ASSEMBLY DIAGRAM BL 7916U 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 Impedance Dosage 10¹² Ohm Proportional, acid or base, user selectable Dosing Contact Isolated, 2A, Max. 240V, resistive load, 1,000,000 strokes Alarm Contact Isolated, 2A, Max.
MECHANICAL DIMENSIONS INSTALLATION The Controller/Pump series of instruments are enclosed in a modular housing for maximum protection. The dimensioned illustrations show the layout of the Controller/Pumps and how they utilize the one-piece polypropylene, injection-molded housing. Since there are no joints or screws holding different sections of the housing together, the case is extremely rugged and sturdy.
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. Injection Point • Choose an injection point that allows you to mount the injection valve assembly vertically.
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. • Slide the connector up to the threads and tighten to form a seal.
EXAMPLE OF TYPICAL INSTALLATIONS HOSE PIPE PUMP CONNECTION FILTER / FOOT VALVE RESEVOIR CHECK VALVE MANUAL SHUTOFF VALVE Downhill Installation Suggested installation when pumping from one container to another, each at different levels and with only nominal pressure. LEGEND Flooded Suction Installation Suggested Installation for consistent output when using a low stroke rate. Also suggested for highly viscous chemicals.
+ - 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) • Remove the protective plastic plate covering the terminals by removing the 2 screws on both sides of the plate. A 2-wire Pt100 can be connected to provide automatic temperature compensation of the pH measurements. The pump is supplied with a 110 Ohm resistor connected to the 2 Pt100 terminals.
For example, a level controller can be placed in the tank of the liquid being dosed so that the pump is stopped when the chemicals are exhausted. SETPOINT ADJUSTMENTS MANUAL • With a small screwdriver adjust the SET COARSE trimmer to display a value close to the desired setpoint e.g. 7.00. 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 needed for example when the pump needs to be primed.
pH 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. TROUBLESHOOTING GUIDE ELECTRICAL The pump does not operate when turned ON: • Check the power supply and connections. Voltage should be between 100 - 130 VAC for 115 V models and between 200 - 250VAC for 230 V models.
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. MAINTENANCE Your BlackStone Pump is designed to give you years of trouble-free service. Maintenance should be the preventative type, that is, periodic cleaning and inspecting for any damage or leakage.
ELECTRODE CONDITIONING AND MAINTENANCE 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 cm (1") below the fill hole, add HI 7082 3.5M KCl electrolyte solution for double junction or HI 7071 3.5M KCl+AgCl electrolyte solution for single junction electrodes.
For refillable electrodes**: Refill the electrode with fresh electrolyte (HI 7071 for single junction or HI 7082 for double junction electrodes). Allow the electrode to stand upright for 1 hour. Follow the Storage Procedure above. CLEANING PROCEDURE General Soak in HI 7061 general cleaning solution for approximately 30 minutes. Removal of films, dirt or deposits on the membrane/junction: Protein Soak in HI 7073 protein cleaning solution for 15 minutes.
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. Oxidation is always coupled together with reduction so that as one element gets oxidized, the other is automatically reduced, therefore the term oxidation-reduction is frequently used.
CHEMICAL COMPATIBILITY GUIDE PARTIAL LISTING OF CHEMICALS THAT CAN BE USED WITH BLACKSTONE PUMPS (Rated for 45°C.
HI 721101 HI 721106 ACCESSORIES SPARE PARTS HI 721102 TUBE NUT Pump head, O-Ring, 6 screws and washers Pump head, Large PTFE Diaphragm, Aluminum Piston and Aluminum Disk Discharge Valve (Glass Ball, Valve O-Ring, Hose Connector) HEAD NIPPLE CHECK SP ACER VALVE VITON® BALL SEAT O-RING PUMP HEAD HI 721103 VITON® O-RING Suction Valve (Glass Ball, Valve O-Ring, Hose Connector) CHECK VALVE BALL SEAT HEAD NIPPLE TUBE NUT HI 721003 10 x Glass Balls and 10 x Valve O-Rings HI 721004 Injection Valve Ass
HI 7077L HI 7071 HI 7072 HI 7082 Oil & Fat cleaning solution, 500 mL bottle 3.5M KCl+AgCl electrolyte solution, 4x50 mL, for single junction electrodes 1M KNO3 electrolyte solution, 4x50 mL 3.5M KCl electrolyte solution, 4x50 mL, for double junction electrodes RECOMMENDED pH ELECTRODES All electrodes are gel-filled and with ceramic junction unless otherwise indicated. HI 1090T Screw connector, external PG13.
CE DECLARATION OF CONFORMITY Recommendations for Users Before using these products, make sure that they are entirely suitable for the environment in which they are used. Operation of these instruments in residential areas could cause unacceptable interference to radio and TV equipment. Any variation introduced by the user to the supplied equipment may degrade the instruments' EMC performance. Unplug the instruments from power supply before replacing the fuse or making any electrical connections.
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 • Fax (07851) 9129-99 Greece: Tel. (210) 823.5192 • Fax (210) 884.0210 Indonesia: Tel. (21) 4584.2941 • Fax (21) 4584.2942 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.
