Related Manuals for Hanna Instruments HI 93703
Summary of Contents for Hanna Instruments HI 93703
- Page 1 Instruction Manual HI 93703 Portable Microprocessor Turbidity Meter w w w . h a n n a i n s t . c o m...
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Page 2: Table Of Contents
Dear Customer, Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using the instrument. This manual will provide you with the necessary information for correct use of the instrument, as well as a precise idea of it’s versatility. -
Page 3: Preliminary Examination
GENERAL DESCRIPTION With HI 93703 turbidity measurements can be performed with high precision in the field as well as in the laboratory. HI 93703 turbidity meter is a portable, microprocessor-based instrument used to determine the turbidity of water and wastewater. - Page 4 The one-point calibration at 10 FTU* can be easily performed using the available standard. In addition, HI 93703 is the first portable turbidity meter that allows to store the last calibration date and to retrieve it at the user’s convenience.
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Page 5: Principle Of Operation
PRINCIPLE OF OPERATION HI 93703 has been designed to perform measurements according to the ISO 7027 International Standard. The instrument functions by passing a beam of infrared light through a vial containing the sample being measured. The light source is a High Emission Infrared LED with a wavelength peaking at 890 nm, ensuring that the interference caused by colored samples is minimum. -
Page 6: Functional Description
FUNCTIONAL DESCRIPTION 1) Measurement cell 2) LCD (Liquid Crystal Display) 3) ON/OFF key 4) CAL key, to enter the calibration mode 5) READ/ key, to perform measurements and to set the date (day and month) of the last calibration 6) DATE/ key, to display the last calibration date and to select either the month or the day of last calibration... -
Page 7: Specifications
SPECIFICATIONS 0 0 . 0 0 . 1 0 . o s e t u l n o i ± 5 . 0 ± r f o d a e g n i r u c y c a c i h v e h i r e a e r... -
Page 8: Operational Guide
OPERATIONAL GUIDE To prepare the instrument for taking measurements, first install the batteries (see Battery Replacement section on page 17) and then turn the instrument on. To maximize the battery life the meter is automatically switched off after 5 minutes of non-use. To reactivate it, simply press the ON/OFF key. - Page 9 • Wipe the cuvette thoroughly with a lint-free tissue (HI 93703-70) before inserting into the measurement cell. The cuvette must be completely free of fingerprints and other oil or dirt, particularly in the area where the light goes through (approximately the bottom 2 cm/1 inch of the cuvette).
- Page 10 • Even though HI 93703 covers a very wide range of turbidity values, for very accurate measurements of samples exceeding 40 FTU*, Standard Methods require dilution. In such cases, the correct amount of HI 93703-0 or turbidity-free water to be added to the sample can be calculated as follows:...
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Page 11: How To Ensure Accurate Measurements
• All glassware used to contain the standards and the samples should be maintained clean, washed with HI 93703-50 cleaning solution and rinsed with HI 93703-0 or turbidity-free water. • Collect the samples in clean glass or plastic bottles, fit stoppers and perform the analysis quickly. -
Page 12: Sources Of Interferences
• Presence of floating debris and coarse sediments which settle out rapidly will give false readings. • The infrared light source used for HI 93703 turbidity meter, according to ISO 7027 International Standard, can effectively minimize errors due to colored dissolved substances. This effect, named “true color“, is a common interference for most... -
Page 13: Calibration
CALIBRATION A monthly calibration is recommended. To check the date of last calibration, simply hold the DATE/ key down for few seconds. A more frequent check of the instrument is suggested by using the supplied standard solution. CALIBRATION PROCEDURE • Turn the meter on and wait for the display to show “----“. - Page 14 • Press READ/ key to change the month value. • Press DATE/ key and the day info will blink. • Press READ/ key to set the date value. • Press DATE/ key and time is displayed with hour item blinking. •...
- Page 15 • • • • • Take the HI 93703-0 bottle containing the ZERO FTU* Standard (or turbidity-free dilution water) and fill the measurement cuvette. Note: In order to minimize any error introduced by the cuvette, it is recommended to use, during calibration, the same cuvette you are going to use to perform the measurement.
- Page 16 • • • • • After the second calibration point (10.00 FTU*) has been accepted, the meter will display “500”, asking for the 500 FTU* solution to be placed in the cuvette holder. Note : : : : : At this point the user can exit the calibration mode and save the two-point calibration by pressing READ/.
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Page 17: How To Ensure Accurate Calibration
• • • • • All glassware that comes into contact with standards should be maintained clean. Wash with HI 93703-50 cleaning solution and rinse with HI 93703-0 or turbidity free water. • • • • • Rinse the vial twice with 5 ml of the liquid to be tested. This removes the effect of any previous liquid and any dust or foreign matter that may be present inside. -
Page 18: Standard Suspension
(particles flocculate and settle quickly). Lower concentrations change value within a few days or hours after dilution from stock solutions. The consistency of HI 93703 readings by using both standards has been separately established by Advanced Polymer Systems and HANNA instruments. -
Page 19: Battery Replacement
BATTERY REPLACEMENT All components have been selected to minimize current drain without compromising functionality. In order to minimize the battery consumption, the meter is equipped with an auto-off function which switches the meter off after 5 minutes of non-use. The power source are 4 alkaline batteries (1.5V AA) with an expected life of 60 hours, or 900 measurements. - Page 20 Battery replacement must only take place in a safe area and using the battery types specified in this instruction manual. To install or replace the batteries, turn the unit off and unscrew the 2 screws located on the back of the meter. Remove the battery cover and insert the new batteries in the compartment while paying attention to the polarity.
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Page 21: Lcd And Error Messages
LCD AND ERROR MESSAGES HI 93703 will display several different LCD messages to help the user throughout all operations. The meter is in a ready state and measurement or calibration can be performed. Calibration mode is active. If the CAL... - Page 22 Low battery: when this message appears, the instrument can still perform approx. 50 measurements. Batteries are too weak to ensure reliable measurements. This message appears for a few seconds, then the meter will automatically switch off. Batteries must be replaced immediately.
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Page 23: Accessories
HI 93703-50 Cuvette cleaning solution, 230 mL WARRANTY HI 93703 is guaranteed for two years against defects in workmanship and materials when used for their intended purpose and maintained according to instructions. This warranty is limited to repair or replace- ment free of charge. - Page 24 24 Vac or 60 Vdc. To avoid damages or burns, do not perform any measurement in microwave ovens. Hanna Instruments reserves the right to modify the design, construction or appearance of its products without advance notice.
- Page 26 Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA Technical Support for Customers Tel. (800) 426 6287 Fax (401) 765 7575 E-mail tech@hannainst.com www.hannainst.com Local Sales and Customer Service Office Printed in ROMANIA MANTURB 11/16...
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