I. Overview: 
 JRQ-12-type COD Rapid Test is a rapid determination of chemical oxygen demand of the heating device. 
 The instrument can automatically complete the temperature time time, the time set for 15 minutes, the temperature reaches a constant time, automatically shutdown, without human involvement. Temperature elegant small, constant temperature and high accuracy. It uses the latest international PID temperature controller, time controller, heating speed, temperature, buffer is small, the temperature uniformity and other characteristics constant, the operation is simple, is an experimental means of instruments of new products. Potassium dichromate method with the existing backflow of chemical oxygen demand compared with the small size, water, electricity, and good temperature performance. For quick determination of chemical oxygen demand heating COD, the data correspond exactly with the classical method can be widely used in environmental protection, higher education, medicine, health, food, water, chemicals, sewage treatment, paper making, petrochemical, metallurgy, printing and dyeing other industries, so that the indication COD measurement efficient, fast and economical. 
 Second, the major technical indicators 
 1, the temperature adjustable range: 32 ? C ~ 399 ? C 
 2, temperature accuracy: ? 1 ? C 
 3, the heating time: (20min ? 170 ? C) 
 4, digestion time: 1 ~ 120min can be adjusted 
 5, sampling control: 0-99 hours; 0-99 minutes; 0-99 seconds sub-adjustable; 
 6, the maximum power consumption: 0.5KW 
 7, power supply: AC220V 50Hz 
 8, heating the sample number: 12 
 9, aperture: φ16mm