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Summary of Contents for Hanna Instruments 96728
- Page 1 Instruction Manual HI 96728 Nitrate ISM...
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Page 2: Table Of Contents
BATTERY MANAGEMENT ....................21 BATTERY REPLACEMENT ....................22 ACCESSORIES ........................22 WARRANTY ........................23 All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895 , USA. -
Page 3: Preliminary Examination
Please examine this product carefully. Make sure that the instrument is not damaged. If any damage occurred during shipment, please notify your Dealer. Each HI 96728 Ion Selective Meter is supplied complete with: • Two Sample Cuvettes and Caps • 9V Battery •... -
Page 4: General Description
The cuvette is made from special optical glass to obtain best results. The HI 96728 meter measures the nitrate-nitrogen content in water samples in the 0.0 to 30.0 mg/ L (ppm) range. The method is an adaptation of the cadmium reduction method. -
Page 5: Specifications
SPECIFICATIONS 0.0 to 30.0 mg/L Range Resolution 0.1 mg/L Accuracy ±0.5 mg/L ±10% of reading@ 25°C Typical EMC Deviation ±0.1 mg/L Light Source Tungsten lamp Light Detector Silicon Photocell with narrow band interference filter @ 525 nm Method Adaptation of the cadmium reduction method. The reaction between nitrate- nitrogen and the reagent causes an amber tint in the sample. -
Page 6: Principle Of Operation
PRINCIPLE OF OPERATION Absorption of Light is a typical phenomenon of interaction between electromagnetic radiation and matter. When a light beam crosses a substance, some of the radiation may be absorbed by atoms, molecules or crystal lattices. If pure absorption occurs, the fraction of light absorbed depends both on the optical path length through the matter and on the physical-chemical characteristics of the substance according to the Lambert-Beer Law: = ε... -
Page 7: Functional Description
A microprocessor controlled special tungsten lamp emits radiation which is first optically conditioned and beamed to the sample contained in the cuvette. The optical path is fixed by the diameter of the cuvette. Then the light is spectrally filtered to a narrow spectral bandwidth, to obtain a light beam of intensity I or I. - Page 8 KEYPAD DESCRIPTION • ON/OFF: to turn the meter on and off. • ZERO/CFM: this is a bi-functional key. Just press to zero the meter prior to measurement, or confirm edited values. In calibration mode press to confirm factory calibration restore. •...
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Page 9: Errors And Warnings
ERRORS AND WARNINGS The instrument shows clear messages when erroneous condition appears. Messages are also displayed when the obtained values are outside expected range. The beeper is playing a beep on errors. a) on zero reading Light High: There is too much light to perform a measurement. Please check the preparation of the zero cuvette. - Page 10 Over Range: A flashing value of the maximum concentration indicates an over range condition. The concentration of the sample is beyond the programmed range: dilute the sample and re-run the test. c) during calibration procedure Standard Low: The standard reading is less than expected. Standard High: The standard reading is higher than expected.
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Page 11: General Tips For An Accurate Measurement
GENERAL TIPS FOR AN ACCURATE MEASUREMENT The instructions listed below should be carefully followed during testing to ensure best accuracy. • Color or suspended matter in large amounts may cause interference, therefore these should be removed by treatment with active carbon and by prior filtration. •... -
Page 12: Startup
• After the reading it is important to discard immediately the sample, otherwise the glass might become permanently stained. • All the reaction times reported in this manual are referred to 20°C (68°F). As a general rule of thumb, they should be doubled at 10°C (50°F) and halved at 30°C (86°F). •... - Page 13 • Place the cuvette into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove. • Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase.
- Page 14 • Alternatively, wait for 3 minutes then just press READ/ /TIMER. In all cases, the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. • At the end of measurement, the instrument directly displays concentration in mg/L of nitrate-nitrogen on the LCD.
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Page 15: Validation Procedure
• Place the CAL CHECK Standard HI 96728-11 Cuvette A into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove. • Press ZERO/CFM and the lamp, cuvette... - Page 16 • Press CAL CHECK and the lamp, cuvette and detector icons together with “CAL CHECK” will appear on the display, depending on the measurement phase. • At the end of the measurement the display will show the validation standard value. The reading should be within specifications as reported in the CAL CHECK Standard Certificate.
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Page 17: Calibration Procedure
“ZERO” asks for instrument zeroing. • Place the CAL CHECK Standard HI 96728-11 Cuvette A into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove. • Press ZERO/CFM and the lamp, cuvette... - Page 18 • Remove the cuvette. • Place the CAL CHECK Standard HI 96728-11 Cuvette B into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove. • Press READ/ /TIMER and the lamp,...
- Page 19 DATE INPUT • Press GLP/ to edit the desired year (2009-2099). If the key is kept pressed, the year number is automatically increased. • When the correct year has been set, press ZERO/CFM or READ/ /TIMER to confirm. Now the display will show the month blinking.
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Page 20: Glp
• The instrument will return automatically to measurement mode by displaying dashes on the LCD. In GLP mode, the last calibration date can be verified and the factory calibration can be restored. LAST CALIBRATION DATE To display the calibration date: to enter GLP mode . -
Page 21: Battery Management
• Press READ/ /TIMER to enter in the factory calibration restore screen. The instrument asks for confirmation of user calibration delete. • Press ZERO/CFM to restore the factory calibration or press GLP/ again to abort factory calibration restore. • The instrument briefly indicates “donE” upon restoration of factory calibration prior to returning to measurement mode . -
Page 22: Battery Replacement
REAGENT SET HI 93728-01 Reagents for 100 tests HI 93728-03 Reagents for 300 tests OTHER ACCESORIES Standard Cuvettes (1 set) HI 96728-11 CAL CHECK HI 721310 9V battery (10 pcs.) HI 731318 Cloth for wiping cuvettes (4 pcs.) HI 731331 Glass cuvettes (4 pcs.) -
Page 23: Warranty
WARRANTY HI 96728 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to the instructions. This warranty is limited to repair or replacement free of charge. Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. - Page 24 Local Sales and Customer Service Office Printed in EUROPE (ROMANIA) MAN96728 01/11...
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