1、 Overview

The HJ-200C COD rapid analyzer is an intelligent instrument used by our company for laboratory COD experiments. The instrument adopts a color TFT screen design, which is more convenient and clear to operate. It is suitable for detecting chemical oxygen demand experiments in sewage treatment plants, enterprises, universities, etc. The instrument adopts a unique filtering system to ensure the accuracy and reliability of measurement, and is a cost-effective COD detector.

2、 Main features:

1. The instrument adopts a 4.3-inch color TFT screen, with a friendly interface and convenient user operation;

2. The instrument supports large capacity storage of data (date, time, parameters, measurement results), and can also support USB storage. The instrument and USB can be converted for convenient use by customers;

3. Data transmission, can be connected to a computer and transmit data to the computer through a USB interface, supports Bluetooth wireless transmission (optional);

4. The instrument supports 200 curves, and can customize high-precision measurement curves according to the measurement range requirements. The curve also supports customers to establish instrument segmentation curves, and the segmentation coefficient K can be different according to the measurement concentration, thereby improving measurement accuracy;

5. The instrument adopts ARM9 main control chip, which makes the instrument operation interface smooth, the instrument response speed fast, and the internal storage capacity of the instrument large, up to 500M memory;

6. The instrument adopts the national standard colorimetric dish colorimetric method;

7. The instrument adopts a unique high-precision filtering system, which improves the stability and measurement accuracy of the instrument compared to the same industry in China;

8. Direct reading of concentration, fast and accurate determination of COD concentration in wastewater;

9. Light source lifespan, cold light source, narrowband interference, light source lifespan of over 100000 hours;

10. Curve correction, supporting automatic curve correction and automatic saving;

11. Memory curve, 5 manufacturer curves, 195 expansion curves, a total of 200 curves;

12. Curve customization: Customize high-precision curves based on the customer's measurement range to improve analysis and measurement accuracy. Support customers in establishing instrument segmentation curves, with segmentation coefficients determined by concentration.

3、 Technical parameters:

Measurement project	COD
Instrument model	HJ-200C type
Execution standards	HJ/T 399-2017 Determination of Chemical Oxygen Demand in Water Quality - Rapid Digestion Spectrometric Method
Display mode	4.3-inch color TFT screen, available in both Chinese and English
measuring range	Low wavelength: 5-160 mg/L; High wavelength: 150-8000mg/l (segmented measurement)
accuracy	COD≤100mg/L, Error ≤ ± 5mg/l COD＞100mg/L, Error ≤± 5%
stability	≤0.001 A/10min
Dissolving temperature and time	165 ± 0.5℃； 15 minutes
Anti chlorine interference	[Cl -]<1000mg/L has no effect [Cl -]<8000mg/L (optional)
Measurement time	20 minutes
Batch processing sample quantity	12. 16 or 30 options to choose from
Curve Number	200 items
Store data	10000 pieces
Communication method	RS-232C serial port (printing), USB drive (online) USB HOST (connected to USB flash drive)
Working power supply	AC220V±10% / 50Hz；
work environment	Temperature: (5~40) ℃; Environmental humidity: Relative humidity<85% (no condensation)