Function of COD analyzer

LB-1040 Online COD Analyzer

Features:

1. Realize software integration of COD high, medium, and low ranges in one device, making it more convenient for users to use and maintain.

2. More powerful data processing capabilities can automatically draw data curves for generating historical measurements.

3. The use of a multi-channel selection liquid extraction device imported from abroad ensures high repeatability and accuracy of the measurement.

4. It is possible to implement a user control platform, where users can install device control software (optional) on their computers to control and test instruments.

5. It has printing function and can be connected to a printer (optional) to print the measured data in a timely manner.

6. Equipped with a 7-inch touch screen and a simple operating interface, it can be easy for users to learn, operate, and maintain.

7. The ultra large data storage capacity enables the preservation of historical data for no less than 5 years (with a measurement interval of 1 time/2 hours). Greatly meeting the needs of customers.

8. Automatic liquid leakage alarm function, when a reagent leakage occurs, the instrument will automatically alarm and prompt the user to perform maintenance.

9. The quantitative use of signal automatic recognition function ensures high accuracy and repeatability of measurement.

10. The maintenance of chemical reagents is simplified and convenient, with a monthly replacement of reagents, greatly reducing the maintenance workload for users.

11. The pre-treatment adopts a pipeline type to ensure the authenticity of the water sample, ensuring that the sampling is not blocked and easy to adjust.

12. Accurate measurement of COD containing 10000mg/L chloride ions can be achieved with a measurement accuracy within 10%.

13. One click upgrade of USB flash drive makes software updates easier.

Measurement principle of online COD analyzer:

The Chemical Oxygen Demand (COD) online analyzer is a new generation of fully automatic COD online analyzer based on the Chinese national standard method - potassium dichromate oxidation method. This product is a maintenance free online monitoring instrument launched by our unit based on years of research on water quality analysis products. Through the oxidation-reduction reaction inside the mixed solution formed by water sample, potassium dichromate, silver sulfate (as a catalyst to oxidize linear aliphatic compounds more fully) and concentrated sulfuric acid under high temperature and high pressure environment, Cr (VI) in the solution is reduced to Cr (III), resulting in a change in the color of the mixed solution. The degree of color change of the solution corresponds to the chemical oxygen demand (COD) of the water sample. The instrument can directly measure the COD value of the water sample through photoelectric colorimetry. Chloride ions in water samples are the main interfering substances, and COD-1040 can be eliminated by adding lvhua mercury to chelate chloride ions in water samples.

Online COD analyzerTechnical Specifications:

Measurement method: Potassium dichromate high-temperature digestion, colorimetric determination (national standard GB11914-89)

Test range: (0-200) mg/l, (0-1000) mg/l, (0-5000) mg/l Three range options are available

Large testing range: 0-40000mg/l (after automatic dilution)

Anti chloride ion interference: up to 40000 mg/l (after automatic dilution)

Offline detection: 8 mg/l

Resolution:<1mg>

Accuracy: Standard solution<10%; Water sample<15%<>

Reproducibility:<5%

Dissolving temperature: 165 ℃, adjustable

Dissolving time: 15 minutes, adjustable

*Running time: ≥ 720h/time

Range drift: ± 5% F.S

Sample interval: continuous, 1 hour, 2 hours... 24 hours, trigger

Calibration interval: manually or automatically at selected intervals and times (1-7 days)

Cleaning interval: manually or automatically at selected intervals and times (1-7 days)

Maintenance interval:>1 month, approximately 1 hour each time

Reagent consumption: Approximately 720 samples per set of reagents

Human computer interface: 7-inch, 70000 colors, 800 * 480 resolution, TFT true color touch screen

Printing: Reserved printer interface, can be connected to an external industrial micro printer (optional)

Storage: 20000 pieces of data, not lost in case of power failure, automatically overwrite early data when full (can add 40000 pieces of data)

Communication interface: 1 RS232 digital interface or RS485, supporting MODBUS communication protocol or custom protocol

1 analog signal 4-20mA (20mA corresponds to adjustable range)

Preprocessing system: self-cleaning, blowback, and precision filtration functions ensure good representativeness of the sample while avoiding suspended particles from blocking the pipeline, ensuring data continuity. optional

Overall dimensions 900×600×450(mm)weight50kg

power supplyAC 220V±20%, 50Hz±1%power300W

ambient temperature 5～40℃ ambient humidity ≤85%