Related Manuals for Hanna Instruments BL7916-2
Summary of Contents for Hanna Instruments BL7916-2
- 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...
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Page 2: Table Of Contents
WARRANTY • LDPE tubing, 7 m (23') • power cord All Hanna Instruments pumps are warranted for one year against defects in • instruction manual workmanship and materials when used for their intended purpose and maintained Note: Save all packing material until you are sure that the pump according to instructions. -
Page 3: General Description
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 securely fastened to columns, walls, The following chart shows the inverse relationship between flow rate braces, etc. -
Page 4: Functional Description Bl 7916
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. Hose 4. Hose 5. Liquid Crystal Display 5. Liquid Crystal Display 6. -
Page 5: Specifications
SPECIFICATIONS VALVE / HOSE ASSEMBLY DIAGRAM BL 7916D BL 7916U Range 0.00 to 14.00 pH Resolution 0.01 pH Accuracy (@20°C/68°F) ±0.01 pH NECK Typical EMC Deviation ±0.1 pH Input Impedance 10¹² Ohm Dosage Proportional, acid or base, user selectable Dosing Contact Isolated, 2A, Max. -
Page 6: Mechanical Dimensions
MECHANICAL DIMENSIONS INSTALLATION Materials Needed The Controller/Pump series of instruments are enclosed in a modular housing for maximum protection. The dimensioned illustrations show • LDPE hose (7 meter/22 feet) (included) or other type of tubing the layout of the Controller/Pumps and how they utilize the one-piece (PTFE, for example) more suitable for a specific application (optional) polypropylene, injection-molded housing. - Page 7 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 pH/ORP electrode to the BNC socket of the pump. 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 8 Hose Connections • Repeat the same installation procedure for the hose connections on the discharge end with the injection assembly (HI 721004) • Cut a long enough section of the hose to reach the suction valve of the pump head from the feed tank. Al- low some slack in the hose and be sure it is not kinked or twisted.
- Page 9 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 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.
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Page 10: Operational Guide
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 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. -
Page 11: Setpoint Adjustments
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. exhausted. MANUAL • With a small screwdriver adjust the SET COARSE trimmer to display a value close to the desired setpoint e.g. -
Page 12: Ph Calibration
pH CALIBRATION TROUBLESHOOTING GUIDE ELECTRICAL BL 7916 only: The pump does not operate when turned ON: • Ensure that the display selector switch is set to MEASURE and dip • Check the power supply and connections. Voltage should be the electrode tip in a neutral buffer solution (pH 7.01). between 100 - 130 VAC for 115 V models and between 200 - 250VAC for 230 V models. -
Page 13: Maintenance
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" • Be sure that valves are tight and O-rings are in place. lbf). -
Page 14: Electrode Conditioning And Maintenance
During transport tiny bubbles of air may have formed inside the glass **For industrial applications, gel-filled electrodes are preferable due to lesser maintenance requirements. bulb. The electrode cannot function properly under these conditions. AmpHel ® is a registered Trademark of "Hanna Instruments"... -
Page 15: Cleaning Procedure
For refillable electrodes**: • Slow Response/Excessive Drift: Soak the tip in Hanna Solu- tion HI 7061 for 30 minutes, rinse thoroughly in distilled water Refill the electrode with fresh electrolyte (HI 7071 for single junction or and then follow the Cleaning Procedure above. HI 7082 for double junction electrodes). -
Page 16: Taking Redox Measurements
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 allow the quantification of the oxidizing or a few minutes. reducing power of a solution, and are commonly expressed in mV. If the pretreatment is not performed, the electrode will take signifi- Oxidation may be defined as the process during which a molecule (or cantly longer to respond. -
Page 17: Chemical Compatibility Guide
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 CHEMICALS THAT CAN BE USED Lard Oil Sodium Bisulfate WITH BLACKSTONE PUMPS Lauric Acid Sodium Bisulfite Lead Acetate Sodium Borate (Rated for 45°C. -
Page 18: Spare Parts
HI 721101 Pump head, O-Ring, 6 screws and washers ACCESSORIES HI 721106 Pump head, Large PTFE Diaphragm, Aluminum Piston and Aluminum Disk SPARE PARTS HI 721102 Discharge Valve (Glass Ball, Valve O-Ring, Hose Con- nector) TUBE NUT HEAD NIPPLE CHECK SP ACER VALVE VITON®... - Page 19 HI 7077L Oil & Fat cleaning solution, 500 mL bottle HI 3130B/3 BNC connector, 3 m (9.9') cable, Pt, glass-body with HI 7071 3.5M KCl+AgCl electrolyte solution, 4x50 mL, for external thread single junction electrodes HI 3110T Screw connector, external PG13.5 thread, double HI 7072 1M KNO electrolyte solution, 4x50 mL...
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Page 20: Ce Declaration Of Conformity
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. Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. - Page 21 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.
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