KHC0D-8Z standard COD digestion device adopts microcomputer technology and reasonable design. It can simultaneously heat and reflow eight 250ML conical flasks. Fully comply with the national standard method of GB11914-89, select high-quality electric furnace wire, correct heating power, and boil for 2 hours.
KHC0D-8Z standard COD digestion device is heated by special special electric furnace plate. When heating, the surface heat is even, and the temperature rise and temperature drop are fast. At the same time, the sample solution is accidentally dropped and naturally volatilized, which can reduce the damage to the instrument caused by improper operation.
KHC0D-8Z standard COD digestion device can set the digestion time and display the digestion time countdown. After the digestion is completed, the instrument automatically stops heating, the instrument fan continues to work, and the auxiliary sample is cooled, which can be left unattended.
The KHC0D-8Z standard COD digestion device uses a glass burr return tube instead of a spherical return tube, and replaces the circulating water cooling method with air-cooling and water-cooling technology, which is more convenient to operate. The cooling part is mainly completed by water cooling of the burr condenser and air cooling by the fan. The upper part of the condensing tube is spherical 3 bubbles, and the cooling effect is better. The catalyst is added here to prevent the instantaneous evaporation of the light components in the sample and can be volatilized. cap. The lower part is in the form of "burr". The three opposite "cold bubbles" protruding from the wall of the condensation tube on one plane increase the cooling area and block the passage of volatile substances and vapors than the simple spherical condensation tube. With the dual function of the cooling water in the upper part of the spherical return pipe and the fan inside the machine, the KHC0D-8Z standard COD digestion device ensures the reflux cooling of the sample, and the upper insert type burr return pipe is safer and more stable to use.
Technical specifications:
Measurement range: 5 ~ 700mg / L; 700mg / L ~ 10000 mg / L water sample after dilution
Digestion time: 1 minute to 2 hours and 30 minutes (user can choose heating time independently)
Measurement error: the relative standard deviation of potassium hydrogen phthalate standard solution (500mg/L) is not more than 5.0%;
The relative standard deviation of industrial organic wastewater (500mg/L) is not more than 8.0%
Ambient temperature: ≤ 40 °C
Number of digested samples: 8 250ml conical flasks, heated in two rows simultaneously
Heating power: ≤1600W (AC 220V, 50HZ)
Instrument size: 490*290*605mm(H)
Note: KHCOD-100 8-hole COD automatic digestion reflux meter (8 300ml straight bottles)
KHCOD-8Z is an 8-hole COD national standard digestion reflux device (8 250ML conical flasks)
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