1、 Product Overview

The KD-30B portable multi in one water quality detector features a cold light source, portable carrying case, large screen Chinese operation, connection to computer and printer, 30000 historical records, 7-point automatic calibration, large capacity lithium battery power supply, and integrated digestion and measurement machine. This product combines classic colorimetric methods with advanced computer technology, using microcomputer optoelectronic colorimetric detection principles to replace traditional visual colorimetric methods, eliminating human errors and greatly improving measurement resolution. This product has the characteristics of automatic PID temperature control, dual LCD display, AC/DC dual-use, automatic zero adjustment, concentration direct reading, curve storage, automatic printing, etc. The instrument is easy to operate, human-machine interactive operation, and users can apply this product without complex professional knowledge.

2、 Performance characteristics

1. Dual LCD display, large screen LCD backlight display, 240 * 128 dot matrix, Chinese operation interface, user-friendly program design.

2. The measurement range is wide and can be automatically switched according to the actual situation of the water sample.

3. The determination and digestion systems are designed separately, with independent power control, and the operation process can be carried out separately without affecting each other;

4. Automatic constant temperature control system, PID regulation technology, constant temperature and high accuracy in the digestion process;

5. The calibration mode from 1 o'clock to 7 o'clock automatically calculates slope, intercept, and correlation coefficient, with high measurement accuracy.

6. Intelligent design for fault self diagnosis makes instrument management and maintenance simple and convenient.

7. The instrument has a built-in real-time clock, and each measurement record has a measurement timestamp for easy statistics and queries;

8. Large capacity data storage with power-off protection design ensures that the instrument is not damaged and data records are never lost.

9. Strong anti-interference ability, suitable for industrial sites, and can be widely used for monitoring surface water and pollution sources.

10. The instrument adopts a semiconductor cold light source emitter, a unique optical circuit design, strong anti-interference ability, high measurement data accuracy, good stability, and a light source lifespan of tens of thousands of hours.

11. Equipped with a data output interface, it can be connected to a computer to transmit measurement data to the computer;

12. The instrument comes with a thermal printer that can directly print measurement data and historical data;

13. Handheld box design, lightweight, aesthetically pleasing, and easy to carry;

14. The instrument is equipped with a built-in DC power supply and lithium battery power supply, which can achieve heating, digestion, and colorimetric determination of multiple batches of water samples;

15. Low reagent usage, low operating costs, and strong anti-interference ability.

3、 Technical indicators

Dissolving quantity: ≤ 4 tubes;

Temperature indication error: ≤ ±1℃；

Uniformity of temperature field: ≤ 2℃；

Dissolving time indication error: ≤ ±2%；

Curve parameters: 100 measurement curve parameters can be set;

Calibration: 1-7 point calibration mode, automatically correcting curve values;

Clock: Built in real-time clock, with a monthly cumulative error of less than 10 seconds;

Record storage: can store 10000 measurement results, data will never be lost in case of power failure;

Printing: Comes with a built-in printer to print measurement results at any time;

Communication method: RS232， The measurement results can be uploaded to a computer for easy statistical analysis by users;

Display: 240 * 128 large blue backlit display, Chinese operation interface;

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

Working power supply: AC220V ± 10%/50Hz, DC 16V lithium battery;

Dimensions: 400 * 300 * 200mm, Weight: 8kg.

COD index

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

2. Measurement range: 5-10000 mg/L (segmented or diluted measurement when>1000 mg/L);

3. Dual wavelength measurement: 5-150mg/L, low wavelength; 100-1000mg/L, high wavelength;

4. Measurement error: 5-100 mg/L, absolute error ≤± 5 mg/L; 100 mg/L to 10000 mg/L, relative error ≤± 5%;

5. Dissolution temperature: 165 ± 1 ℃; Dissolving time: 15 minutes; Automatic timing;

6. Anti chlorine interference: [CL -]<1000mg/L (>1000mg/L can be diluted for measurement).

Ammonia nitrogen index

1. Determination method: Nessler's colorimetric method;

2. Measurement range: 0-50mg/L;

3. Measurement error: ≤ ±5 %；

Total phosphorus index

1. Determination method: ammonium molybdate spectrophotometric method;

2. Measurement range: 0.01mg/L to 24mg/L;

3. Measurement error: ≤ ±5 %；

4. Dissolution temperature: 120 ± 1 ℃; Dissolving time: 30 minutes; Automatic timing;

Total nitrogen index

1. Measurement method: photometric colorimetric method;

2. Measurement range: ≤ 100mg/L；

3. Measurement error: ≤ ±5 %；

4. Dissolution temperature: 125 ± 1 ℃; Dissolving time: 30 minutes; Automatic timing.

Turbidity index

1. Measurement method: spectrophotometric method;

2. Measurement range: 0-400 NTU (segmented measurement when>100 NTU, dilution measurement for excess range);

3. Measurement error: ≤± 5%;