HCA-102 Standard COD Dissolver Upgraded COD Tester

The new national standard HJ828-2017 replaces the national GB 11914-89 standard analysis method and standardizes the development of water quality chemical oxygen demand COD_（Cr）The measurement steps strictly specify the conditions and indicators of the method, such as heating and digestion time, solution acidity, oxidant and catalyst dosage. It is obvious that the water quality COD_（Cr）There are strict conditions for the measurement, and any operation that violates these conditions will affect the accuracy of the measurement.

KHCOD-8K National Standard MethodCODThe digestion reflux device adopts microcomputer technology and is designed reasonably,LCD (Liquid Crystal Display)The temperature of the electric furnace plate is displayed, and the digestion time is also shown. It can simultaneously heat and reflux digest 8 250ML conical flasks. *According to the new national standard HJ 828-2017 National Standard Method,Microcrystalline glass countertopChoose high-quality heating wire and reasonable heating power to ensure a slight boiling time of 2 hours.

KHCOD-8K National Standard MethodCODDissolving reflux device, another innovation, usingControllable silicon regulates heating voltageHeat up toboiltemperature；Secondly, it has temperature control protection function, which can be setmustTemperature, due to seasonal and regional temperature differences, can be set arbitrarily regardless of the size of the temperature difference between summer and winter chambers. This changes the fixed power of ordinary standard COD digesters and the different boiling effects of temperature differences between summer and winter chambers. When the power is high, there is excessive boiling in summer, and when the power is low, there is insufficient boiling in winter.

The KHC0D-8K national standard COD digestion reflux device uses a specially designed heating plate for heating, a microcrystalline glass tabletop, an overall structure, a reasonable air separation design, and easy installation and replacement of the heating plate. The heating surface heats evenly during heating, and the heating and cooling rates are fast. The sample solution accidentally drips onto it, making cleaning very convenient.

The KHC0D-8K national standard COD digestion reflux device can set the digestion time, display the digestion time countdown, and automatically stop heating after digestion. The instrument fan continues to work to assist in sample cooling and can be left unattended.

The KHC0D-8K national standard COD digestion reflux device adopts a glass burr reflux tube instead of a spherical reflux tube, and replaces the circulating water cooling method with air cooling and water cooling technology, making operation more convenient. The cooling part is mainly completed by burr condensation tube water cooling and fan air cooling, and the upper part of the condensation tube is spherical3Bubble, better cooling effect, catalyst added from here, prevents the instantaneous evaporation of light components in the sample, and can be covered with a volatilization cap. The following section is'burr'Shape, protruding from the wall of a condenser tube on a plane3A person facing each other'Cold Bubble'Compared to a simple spherical condenser tube, it increases the cooling area and can block the passage of volatile substances and vapors. In addition, the cooling water in the upper part of the spherical reflux tube and the fan inside the machine have a dual effect,KHC0D-8ZType standardCODThe digestion device ensures the reflux cooling of the sample, and the upper inserted burr reflux tube makes it safer and more stable to use.

The chemical solution preparation, operation, and COD calculation of the instrument shall comply with GB 11914-89 and be below 50mg/LThe accuracy of COD water samples can be improved by diluting titrants and oxidants, exceeding 1000mg/LThe COD water sample can be measured by diluting it proportionally.

Technical specifications:

LCD display, microcomputer design, microcrystalline glass tabletop, with peak sound prompt function, capable of dissolving under temperature control

Measurement range:5～700mg/L；700mg/L～10000 mg/LDetermination after dilution of water sample

Dissolving time:1Minutes to 9 hours30Minutes (usually set to 2 hours and 30 minutes)

Temperature control range: room temperature -400℃

Measurement error: Potassium hydrogen phthalate standard solution（500mg/L）The relative standard deviation is not greater than5%；

Industrial organic wastewater（500mg/L）The relative standard deviation is not greater than8%

Ambient temperature ≤ 40℃

Number of Dissolved Samples:8a250mlCone shaped bottle,Simultaneously heat and digest in two rows

Heating power: ≤1650W（AC 220V，50HZ）

Instrument size:490*290*605mm（H）

Note:The sample processing and analysis methods refer to the new national standard analysis method HJ828-2017.