Hanna Instruments HI 755 Instruction Manual

Also see for HI 755: Instruction manual User manual

• Turn the meter on by pressing the button,all segments will be displayed. When thedisplay shows ‘’Add’’, ‘’C.1’’ with ‘’Press’’blinking, the meter is ready.• Fill the cuvette with 10 mL of unreactedsample and replace the cap. Place the cuvetteinto the meter and close the meter’s cap.• Press the button. When the display shows“Add”, “C.2” with “Press” blinking themeter is zeroed.• Remove the cuvette, open it and using a1 mL syringe carefully add exactly 1.00 mLof Alkalinity Reagent to the sample. Replacethe cap and gently invert 5 times. Place thecuvette back into the meter.Note: Pay attention not to spill reagent otherwisefull color development may be inhibited.• Press the button. The instrument directlydisplays the concentration of alkalinity inppm of CaCO3. Alkalinity conversion:1 ppm CaCO3 = 0.02 meq/L= 0.056 dkHThe meter automatically turns off after 10minutes.10 mL• It is important that the sample does not contain any debris.• Whenever the cuvette is placed into the measurement cell, it must be dryoutside, and completely free of fingerprints, oil or dirt. Wipe it throughly withHI 731318 or a lint-free cloth prior to insertion.• Shaking the cuvette can generate bubbles, causing higher readings. To obtainaccurate measurements, remove bubbles by swirling or by gently tapping thecuvette.• Do not let the reacted sample stand for too long after reagent is added, asaccuracy will be affected .• After the reading it is important to discard the sample immediately , otherwisethe glass might become permanently stained.REAGENT SETSHI 755-26 Liquid Reagents for 25 Alkalinity tests, 1 syringe and 1 tipOTHER ACCESSORIESHI 740142 1 mL graduated syringeHI 740028 1.5V AAA batteries (4 pcs)HI 731318 Cloth for wiping cuvettes (4 pcs)HI 731321 Glass cuvettes (4 pcs)HI 731225 Cuvette cap for checker HC (5 pcs)HI 93703-50 Cuvette cleaning solution (230 mL).Recommendations for UsersBefore using these products, make sure that they are entirely suitable for your specific application and forthe environment in where they are used.Operation of these instruments may cause unacceptable interferences to other electronic equipments, thusrequiring the operator to take all necessary steps to eliminate interferences.Any variation introduced by the user to the supplied equipment may degrade the instrument’s EMCperformance.To avoid damage or burns, do not put the instrument in the microwave oven. For your safety do not use orstore the instrument in hazardous environments.For additional information, contact yourdealer or the nearestHanna Customer Service Center.To find the Hanna Office in your area,visit our web siteBattery managementTo 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 theinstrument 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, follow the steps:• 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.• Remove the battery from its location and replace it with a new one.• Insert the battery cover and put back the screw with a screwdriver.IST755 1 1/10Measurement procedure: Accessories:Tips for an accurate measurementwww. .com information@itm.com1.800.561.8187

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