1、 Instrument Introduction

The TC-301A COD ammonia nitrogen total phosphorus detector is a COD ammonia nitrogen total phosphorus detector developed and designed by our company in accordance with national standards "HJ/T399-2007 Determination of Chemical Oxygen Demand in Water Quality - Rapid Digestion spectrophotometric method", "HJ 535-2009 Determination of Ammonia Nitrogen in Water Quality - Nessler's reagent spectrophotometric method" and "GB/T 11893-1989 Determination of Total Phosphorus in Water Quality - Ammonium molybdate spectrophotometric method", as well as industry requirements. This COD ammonia nitrogen total phosphorus detector has PID automatic adjustment technology and functions such as curve self calibration and automatic zero adjustment, which enhances the accuracy and stability of the instrument; In addition, the COD ammonia nitrogen total phosphorus detector is equipped with a micro thermal printer, which can directly print experimental data; Widely used in COD testing, ammonia nitrogen testing, and total phosphorus testing in various industries such as laboratories, sewage treatment plants, universities, environmental monitoring departments, and research institutions.

2、 Main features

1. The measurement system adopts advanced optical systems and cold light sources, with high measurement accuracy, small drift, and good stability;

2. Adopting a 13:7 series high brightness large screen LCD display, with a Chinese operating system for easy operation;

3. The digestion system is independent of the measurement system and does not interfere with each other;

4. The digestion system adopts PID regulation technology, which has high temperature control performance, good stability, and saves energy consumption;

5. The instrument has an automatic calibration function, which can automatically adjust the calibration curve and improve measurement accuracy;

6. The use of spectrophotometry combined with specialized reagents greatly reduces operation time and workload;

7. Built in large capacity storage space, capable of storing 100 curves and 50000 measurement results;

8. The instrument comes with a computer connection interface, which can upload experimental data or connect to a printer to print data;

9. Built in micro thermal printer, capable of directly printing experimental data;

10. The instrument is equipped with dedicated data recording and processing software, which facilitates the storage, processing, and analysis of experimental data;

11. The instrument casing adopts a dedicated sheet metal casing, which is durable and long-lasting;

3、 Technical parameters

① COD parameters:

1. Determination method: spectrophotometric rapid catalytic method

2. Range: 5~150mg/L, 100~5000 mg/L (segmented measurement, expandable);

3. Measurement error: ≤ ±5 %

4. Range of photometric measurement: 0-2A

5. Wavelength accuracy: ± 1 nm;

6. Linear photometric measurement: ± 0.002 A;

7. Repeatability of photometric measurement: ± 0.005 A;

8. Accuracy of photometric measurement: ± 0.005 A;

9. Dissolution temperature: 165 ± 1 ℃;

10. Dissolution time: 15 minutes;

11. Measurement time: 30 minutes for simultaneous measurement of 9/12/25 water samples;

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

13. Temperature indication error: ＜ ±1.5℃；

14. Uniformity of temperature field: ≤ 1.5℃；

15. Error in digestion time indication: ≤ ±3%；

16. Curve parameters: 100 measurement curve parameters can be set;

17. Record storage: It can store 50000 measurement results.

18. Printing: Equipped with a built-in micro thermal printer, it can directly print experimental data;

19. Environmental temperature: (5~40) ℃; Environmental humidity: relative humidity<85% (no condensation);

20. Working power supply: AC220V ± 10%/50Hz; DC power supply can work continuously for 50 hours.

② Ammonia nitrogen parameters:

1. Determination method: Nessler's reagent spectrophotometric method

2. Range: 0.02-25-50mg/L (segmented measurement, expandable);

3. Measurement error: ≤ ±5 %

4. Range of photometric measurement: 0-2A

5. Wavelength accuracy: ± 1 nm;

6. Linear photometric measurement: ± 0.002 A;

7. Repeatability of photometric measurement: ± 0.005 A;

8. Accuracy of photometric measurement: ± 0.005 A;

9. Curve parameters: 100 measurement curve parameters can be set;

10. Calibration: Built in automatic calibration curve function;

11. Built in high-precision micro electronic clock with a monthly error of less than 8 seconds;

12. Record storage: store 50000 experimental results, power off data protection;

13. Printing: Equipped with a built-in micro thermal printer, it can directly print experimental data;

14. Communication method: RS232， Can be connected to a computer RS232/USB interface to upload experimental results;

15. Display: 250 * 130 LCD blue backlit display, fully Chinese operation interface;

16. Environmental temperature: (5~40) ℃; Environmental humidity: relative humidity<85% (no condensation);

17. Working power supply: AC220V ± 10%/50Hz, DC power supply can work continuously for 50 hours.

③ Total phosphorus parameters:

1. Determination method: Ammonium molybdate spectrophotometric method

2. Measurement range: 0.01~24mg/L (segmented measurement, expandable)

3. Measurement error: ≤ ±5 %

4. Range of photometric measurement: 0-2A

5. Wavelength accuracy: ± 1 nm;

6. Linear photometric measurement: ± 0.002 A;

7. Repeatability of photometric measurement: ± 0.005 A;

8. Accuracy of photometric measurement: ± 0.005 A;

9. Dissolution temperature and time: 120 ± 1 ℃; 30min

10. Measurement time: Dissolve 9/12/25 water samples simultaneously within 30 minutes;

11. Temperature indication error: ＜ ±1.5℃；

12. Uniformity of temperature field: ≤ 1.5℃；

13. Error in digestion time indication: ≤ ±3%；

14. Curve parameters: 100 measurement curve parameters can be set;

15. Record storage: capable of storing 50000 measurement results;

16. Printing: Equipped with a built-in micro thermal printer, it can directly print experimental data;

17. Environmental temperature: (5~40) ℃; Environmental humidity: relative humidity<85% (no condensation);

18. Working power supply: AC220V ± 10%/50Hz; DC power supply can work continuously for 50 hours.

4、 Product configuration