1、 Instrument Introduction

The DS-200C COD rapid analyzer adopts the rapid catalytic method (chromium method). The water sample is heated and digested with a special reagent to produce trivalent chromium ions through oxidation-reduction. The COD value is calculated by colorimetric analysis using spectrophotometry. The design performance of the product meets the requirements of the environmental protection industry standard "HJ/T399-2007 Determination of Chemical Oxygen Demand in Water Quality - Rapid Digestion spectrophotometric method", and is applied to the detection of wastewater from various industries (industrial wastewater, urban sewage, domestic sewage, and surface water in rivers and lakes).

This product has greatly improved in terms of stability, accuracy, measurement range, and practicality. Multiple options can meet the diverse needs of different users.

2、 Main functions:

1Chinese operation interface, large screen guidance menu LCD display;

2The center wavelength is610nm；

3Can be directly measuredCOD, with printing function;

4Multiple standard curves can be manually set, modified, and saved in memory;

5Standard samples can be used for automatic curve calculation and establishment;

6Has full screen page flipping capability/view/modify/Save function;

7Equipped with automatic protection function in case of temperature control exceeding the limit, the power can be adjusted according to the load;

8Capable of selecting the required parameters based on the preset memory working line;

9Having the current temperature/Flashing and beeping function when the timed parameters are reached;

10Equipped with pre-set temperature/Timer parameter modification and saving function.

3、 Technical parameters:

1Determination method: Rapid catalytic method (chromium method);

2Measurement range:5~2500 mg/L（＞1000 mg/LDilution measurement);

3. Measurement error: 5-100 mg/L, juedui error ≤ ± 5 mg/L; 100 mg/L~5000 mg/L， Relative error ≤± 5%

4Dissolving temperature:165 ± 1℃；

5Dissolving time:10minute;

7Number of dissolved samples:12branch/Batch (standard) (optional)9/25Hole)

6Measurement time:30Simultaneous measurement in minutes12Branch water sample;

7Anti chlorine interference:[CL^-]＜1000mg/ L；[CL^-]＜4000mg/ L(optional);

8. Temperature indication error ＜ ± 1 ℃;

9. Temperature field uniformity ≤ 2 ℃;

10. The error of the digestion time indication is ≤± 2%;

11Curve parameters: built-in50A curve;

12Record storage: Can be stored500Measurement results;

4、 Performance indicators:

1Environmental temperature:（5 ~ 40）℃；

2Environmental humidity: Relative humidity<85%(No condensation);

3Working power supply:AC220V±10% / 50Hz；

4External dimensions:320*240*110mm

5、 Product selection:

6、 Standard configuration:

1 COD host

1 digestion device (standard with 12 holes)

1 box of colorimetric dishes (4 pieces)

1 colorimetric dish rack

12 digestion tubes

1 test tube rack

1 set of specialized reagents (100 times)