Tips for an Accurate Measurement Recommendations for Users • It is important that the sample does not contain any debris. • Whenever the cuvette is placed into the measurement cell, it must be dry outside, and completely free of fingerprints, oil and dirt. Wipe it thoroughly with HI731318 or a lint-free cloth prior to insertion. • Shaking the cuvette can generate bubbles, causing higher readings. To obtain accurate measurements, remove bubbles by swirling or by gently tapping the cuvette. • Do not let the reacted sample stand for too long after reagent is added, as accuracy will be affected. • After the reading it is important to immediately discard the sample, otherwise the glass might become permanently stained. Before using Hanna Instruments products, make sure that they are entirely suitable for your specific application and for the environment in which they are used. Any variation introduced by the user to the supplied equipment may degrade the meter’s performance. For yours and the instrument safety do not use or store the instrument in hazardous environments. Battery Management To save the battery, the instrument shuts down after 10 minutes of non-use. One fresh battery lasts for a minimum of 5000 measurements. When the battery is dead the instrument will display “bAd” then ”bAt” for 1 second and then turns off. To restart the instrument, the battery must be replaced with a new one. To replace the instrument’s battery: • Turn the instrument off by holding the button until the meter shuts off. • Turn the instrument upside down and remove the battery cover with a screwdriver. 72 HI7 • Remove the battery from its location and replace it with a new one, inserting the negative end first. • Insert the battery cover and replace the screw with a screwdriver. HI772 Marine Alkalinity Accessories Reagent sets HI772-26 INSTRUCTION MANUAL Reagents for 25 Marine Alkalinity tests, 1 syringe and 1 tip Other Accessories HI772-11 Marine Alkalinity Certified Standard Kit HI731318 Cloth for wiping cuvettes (4 pcs.) HI731315 Glass Cuvettes and Caps for Checker® HC Colorimeters (2 pcs.) HI740028P 1.5V AAA batteries (12 pcs.) HI740142P 1 mL graduated syringe (10 pcs.) HI93703-50 Cuvette cleaning solution (230 mL) Warranty HI772 is warranted for a period of one year after date of purchase against defects in workmanship and materials when used for their intended purpose and maintained according to instructions. This warranty is limited to repair or replacement free of charge. Damage due to accidents, misuse, tampering or lack of prescribed maintenance is not covered. If service is required, contact your local Hanna Instruments Office. If under warranty, report the model number, date of purchase, serial number and the nature of the problem. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Return Goods Authorization number from the Technical Service department and then send it with shipping costs prepaid. When shipping any instrument, make sure it is properly packed for complete protection. IST772 07/18 Thank You Functional Description Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using the instrument. For more information about Hanna Instruments and our products, visit www.hannainst.com. For technical support, contact your local Hanna Instruments Office or e-mail us at firstname.lastname@example.org Cover Cuvette with cap LCD Liquid Crystal Display Operation Button Errors and Warnings Light High: There is too much light to perform a measurement. Please check the preparation of the zero cuvette. Light Low: There is not enough light to perform a measurement. Please check the preparation of the zero cuvette. Inverted Cuvettes: The sample and the zero cuvette are inverted. Specifications Range 0.0 to 20.0 dKH Resolution 0.1 dKH Accuracy ±0.3 dKH ±5% of reading @25 °C/77 °F Light Source Light Emitting Diode @610 nm Light Detector Silicon Photocell Method Colorimetric method. The reaction causes a distinctive range of colors from yellow to green to greenish blue to develop. Environment 0 to 50 °C (32 to 122 °F); max 95% RH non-condesing Battery Type 1.5V AAA (1 pc.) Auto-Shut off After 10 minutes of non-use Dimensions 86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”) Weight 52 g (1.84 oz.) Turn the meter on by pressing the button. All segments will be displayed. When the display shows “Add”, “C.1” with “Press” blinking, the meter is ready. Cuvette holder Preliminary Examination Please examine this product carefully. Make sure that the instrument is not damaged. If any damage occurred during shipment, please contact your local Hanna Instruments Office. Each HI772 meter is supplied complete with: • Sample Cuvettes and Caps (2 pcs.) • Reagents for 25 tests • 1 mL syringe with tip • 1.5V AAA Battery (1 pc.) • Instruction Manual and Quick Reference Guide Measurement Procedure Under Range: A blinking “0.0” 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 the reading is over range. Dilute the sample and re-run the test. 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, normal operation of the instrument will be interrupted. Change the battery and restart the meter. Fill the cuvette with 10 mL of unreacted sample and replace the cap. Place the cuvette into the meter and close the meter’s cap. Press the button. When the display shows “Add”, “C.2” with “Press” blinking the meter is zeroed. Remove the cuvette from the meter and unscrew the cap. Using a 1 mL syringe carefully add exactly 1 mL of HI772S Reagent to the sample. Replace the cap and gently invert 5 times. Place the cuvette back into the meter. HI772S Note: Pay attention not to spill reagent otherwise full color development may be inhibited. Press the button. The instrument directly displays the concentration of alkalinity in dKH. Alkalinity conversion: 1 dKH = 17.86 ppm CaCO3 = 0.358 meq/L The meter automatically turns off after 10 minutes. Hanna Instruments reserves the right to modify the design, construction or appearance of its products without advance notice.
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