Hanna Instruments HI755 User Manual

Also see for HI 755: Instruction manual Instruction manual

Measurement Procedure• Press the ON/OFF button to turn the checkeron. All segments will be displayed for a fewseconds, followed by “Add”, “C.1” with “Press”blinking.• Fill the cuvette with 10 mL of unreacted sampleand replace the cap. Insert the cuvette into thechecker and close the cap.• Press the ON/OFF button. When the displayshows “Add”, “C.2” with “Press” blinking, thechecker is zeroed.• Remove the cuvette, invert 5 times and unscrewthe cap. Use the 1 mL syringe and add exactly1 mL of HI755S Marine Alkalinity reagent tothe sample. Replace the cap and gently invert5 times.Note: Pay attention not to spill reagentotherwise full color development may beinhibited.• Insert the cuvette into the checker and close thecap. Press the ON/OFF button. The instrumentdisplays the alkalinity concentration in ppm.Alkalinity conversion:1 ppm CaCO3 = 0.02 meq/L= 0.056 dkHThe checker automatically turns off 10 minutesafter reading.1 mL