Total titratable acidity titrator is an automatic titrator designed for easy, fast and accurate analysis of total titratable acidity in water. Potentiometric endpoint determination, peristaltic titrant delivery and integrated magnetic stirring systems eliminate the error and technique dependent results associated with manual titrations. The accuracy of the instrument is ensured by performing a peristaltic pump calibration using the provided HANNA standard. The HI 84430 endpoint determination algorithm analyzes the pH vs. volume curve to determine the exact pH endpoint and performs the necessary calculations. The results are displayed in milligrams per liter CaCO3 or meq/L CaCO3 units on the graphic display. Titrations are conducted using the low range reagent (15 to 500 milligrams per liter as CaCO3) or the high range reagent (400 to 4000 milligrams per liter as CaCO3). An intuitive interface makes the instrument simple to use. A dedicated help key guides the user through set-up and calibration sequences, reports instrument status and aids in troubleshooting. Its features include: log on demand for up to 100 samples (50 pH measurements, 50 titration results), GLP compliance. It is supplied with HI 1131B pH electrode, HI 7071 filling solution (30 mL), HI 7662-M temperature probe, HI 84430-50 titrant low range (100 mL), HI 84430-51 titrant high range (100 mL), HI 84430-55 pump calibration solution (230 mL), HI 84430 additional reagent (30 mL), HI 7061 cleaning solution, HI 7001M pH 1.68 buffer solution (230 mL), HI 7004M pH 4.01 buffer solution (230 mL), HI 70083M pH 8.30 buffer solution (230 mL), 100 mL beakers (2), tube set with dispensing tip, medium stir bars (2), 12 VDC adapter, instruction manual and quick reference guide. Range: milligrams per liter (ppm): 15.0 - 500.0 milligrams per liter (ppm) as CaCO3 and meq/L: 0.3 - 10.0 meq/L as CaCO3 for low range titratable acidity, milligrams per liter (ppm): 400 - 4000 milligrams per liter (ppm) as CaCO3.