• YB-K9830, YB-K9870 are 7-inch color touch screen, YB-K9830A is 10-inch color touch screen, both are Chinese and English operating systems
• Level 3 authority management and system parameter query comply with relevant certification requirements
• The operating system automatically shuts down after 60 minutes of unattended operation, saving energy, safety, and peace of mind
• Operation methods, reagent preparation, precautions, maintenance are placed on the screen for easy access by users
• Built-in “Protein Coefficient Lookup Table” for users to access, query and participate in system calculation
• The data storage capacity reaches 140,000 pieces, which can be queried and printed
• The function of adding alkali again during operation avoids analysis error or sample rejection caused by insufficient alkali amount
• Absence protection of the digestive tube can prevent the system from adding reagents and heating and hurting people when the digestive tube is not placed
• Safety door protection settings ensure the personal safety of operators
• The water shortage protection of the steam system can make the system automatically shut down and alarm when there is water shortage to prevent accidents.
• The steam boiler over-temperature protection system can prevent the failure of the distillation system from causing the temperature in the steam boiler to be too high to damage the instrument
• The safe alkali addition mode can reduce the strong neutralization reaction in the alkali addition process and prevent the occurrence of pipe bursting.
• The optical path system of YB-K9870 product adopts R, G, B three-color light source and corresponding three-color color sensor, with good stability and high resolution
• The titration system adopts a plunger titration pump composed of an imported plunger needle tube and a linear guide rail, with high precision and long life.

Distillation and titration analysis can be performed after the sample is digested and cooled to room temperature. The process principle is as follows: (NH4)2SO4+2NaOH= Na2SO4+2H2O+2NH3↑

That is, the effective sample “ammonia” is separated with high temperature steam under alkaline conditions → collected in a titration cup containing boric acid absorption solution → titrated with acid titration and analyzed to obtain the results.