Dear Customer, Thank you for choosing a Hanna product. This manual will provide you with the necessary information for the correct use of the instrument. Please read it carefully before using the meter. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com. TABLE OF CONTENTS 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 96721 Ion Selective Meter is supplied complete with: • Two Sample Cuvettes and Caps • CAL CHECK standard cuvettes •...
The HI 96721 meter measures total iron (Fe) content in water samples in the 0.00 to 5.00 mg/L (ppm) range. The method is an adaptation of the USEPA Method 315B for natural and treated waters, and Standard Method 3500-Fe B for water and wastewater.
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...
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: to zero the meter prior to measurement, to confirm edited values or to confirm factory calibration restore. • READ/ /TIMER: this is a multi-functional key. In measurement mode , press to make a measurement, or press and hold for three seconds to start a pre-programmed countdown prior to measurement.
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
Under range: A blinking “0.00” indicates that the sample absorbs less light than the zero reference. Check the procedure and make sure you use the same cuvette for reference (zero) and measurement. Over Range: A flashing value of the maximum concentration indicates an over range condition.
Battery low: The battery must be replaced soon. Dead battery: This indicates that the battery is dead and must be replaced. Once this indication is displayed, the meter will lock up. Change the battery and restart the meter. GENERAL TIPS FOR AN ACCURATE MEASUREMENT The instructions listed below should be carefully followed during testing to ensure best accuracy.
• Whenever the cuvette is placed into the measurement cell, it must be dry outside, and completely free of fingerprints, oil or dirt. Wipe it thoroughly with HI 731318 or a lint-free cloth prior to insertion. • Shaking the cuvette can generate bubbles in the sample, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette.
Page 13
• When the beeper sounds briefly and the LCD displays dashes, the meter is ready. The blinking “ZERO” indicates that the instrument needs to be zeroed first. • Fill the cuvette with 10 mL of unreacted sample, up to the mark, and replace the cap.
Page 14
• Remove the cuvette. • Add the content of one packet of HI 93721-0 Iron High Range reagent to the cuvette. Replace the cap and shake gently until dissolution is complete. • Replace the cuvette into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove.
• When the beeper sounds briefly and the LCD displays dashes, the meter is ready. • Place the CAL CHECK Standard HI 96721-11 Cuvette A into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove.
Page 16
“-0.0-”. The meter is now zeroed and ready for validation. • Remove the cuvette. • Place the CAL CHECK Standard HI 96721-11 Cuvette B into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove.
“ZERO” asks for instrument zeroing. • Place the CAL CHECK Standard HI 96721-11 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
“STD LOW”, the standard value was too low. Verify that both CAL CHECK Standard HI 96721-11 Cuvettes, A and B are free from fingerprints or dirt and that they are inserted correctly. Then the date of the last calibration (e.g.: ”01.08.2005”) appears on the display, or...
Page 19
DATE INPUT • Press GLP/ to edit the desired year (2000-2099). 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.
• The instrument will return automatically to the measurement mode by displaying dashes on the LCD. In the GLP mode, the last user calibration date can be consulted and the factory calibration can be restored. LAST CALIBRATION DATE To display the calibration date: to enter GLP mode .
• 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 notifies “done” when restores factory calibration and returns to measurement mode .
Reagents for 300 tests OTHER ACCESORIES OTHER ACCESORIES OTHER ACCESORIES OTHER ACCESORIES OTHER ACCESORIES Standard Cuvettes (1 set) HI 96721-11 CAL CHECK HI 721310 9V battery (10 pcs.) HI 731318 Cloth for wiping cuvettes (4 pcs.) HI 731331 Glass cuvettes (4 pcs.)
WARRANTY HI 96721 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
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 EUROPE MAN96721 06/11 (ROMANIA)
Need help?
Do you have a question about the HI 96721 and is the answer not in the manual?
Questions and answers