1、 Execution standards:
Compliant with international standard method ISO06066-86 and national standardsHJ 828-2017Requirements for the determination of chemical oxygen demand in water quality using the dichromate method.
2、 Technical principle:
This instrument is a pre treated heating reflux device for analyzing COD (chemical oxygen demand) in wastewater——COD automatic reflux analyzerUsing microcomputer technology for timed control of the heating electric furnace for sample digestion, 5, 6, and 10 250ML conical digestion reflux devices can be heated simultaneously; It consists of three parts: heating, temperature control, and air cooling. According to the national standard method, the temperature is raised to 165 ℃ and maintained at a constant temperature for 2 hours to complete the COD digestion step, ensuring reliable and accurate analysis results.
3、 Application scope:
Widely used for water quality testing in industries such as sewage treatment plants, monitoring stations, environmental protection bureaus, third-party testing, petrochemicals, steel mills, power plants, healthcare, universities, and production-oriented enterprises (including food mills, paper mills, printing and dyeing factories, etc.); Suitable for testing the water quality of surface water, groundwater, industrial wastewater, domestic sewage, tap water, etc.
4、 Technical parameters:
1. Heating constant temperature: 165 ℃
2. Measurement range: 0-1000mg/l can be directly measured, 1000-10000mg/l needs to be diluted before measurement.
3. Dissolving time: 2 hours (instrument 0-999min can be set arbitrarily)
4. Measurement error: Potassium hydrogen phthalate standard solution (500mg/L), RSD ≤ 5.0%
Industrial organic wastewater (500mg/L), RSD ≤ 8.0%
5. Batch digestion sample quantity: 5-6 samples (standard conical flask digestion), 10 samples are cylindrical flask digestion.
6. Environmental temperature: 5-45 ℃, otherwise it will affect the temperature stability.
7. Power supply and power consumption: AC220V； 1.3kw
5、 Functional features:
1. 5-6 wells can be directly used for subsequent titration measurements, while 10 wells need to be transferred to a conical flask for titration.
2. The heating panel is corrosion-resistant and has good insulation properties.
3. The burr reflux tube, combined with the built-in fan, ensures good boiling cooling effect and ensures experimental accuracy.
4. Users can adjust the heating power according to the actual voltage situation to ensure the boiling effect during heating.
5. It has an automatic stop function when needed, truly achieving unmanned operation.
6. Energy saving, water-saving, safe and reliable, can save thousands of yuan in water and electricity bills every year.
7. Note: Water samples with COD values below 50mg/L can improve accuracy by diluting titrants and oxidants, while water samples with COD values above 1000mg/L can be measured by diluting the water sample proportionally.
6、 Configuration List:
1 digestion host (with built-in fan), 5/6/10 dedicated burr reflux pipes, 10 dedicated digestion bottles (only available for 10 hole hosts), 1 power cord, 1 certificate of conformity, 1 warranty card, and 1 instruction manual.