Overview
The WD9303B Portable water quality tester is a professional testing equipment launched by the JINGQI brand, which integrates digestion and determination functions. The instrument adopts a separate design of digestion instrument and measuring instrument, which effectively guarantees the measurement accuracy. It is suitable for the rapid determination of various water quality parameters, including COD, ammonia nitrogen and total nitrogen.
Features
1. The digestion instrument and the measuring instrument are designed separately, which does not affect the Measurement accuracy, and has the temperature PID automatic temperature control and Timing function.
2. Adopting a high-performance ultra-low-power 16-bit microcontroller, the standby time of the instrument can reach more than 6 months.
3. Save time and improve detection efficiency.
4. Cold Illuminant, Narrow Band Interference Optical inspection system, Optical inspection Stability.
5. Equipped with data power-off protection function.
6. 30 standard Linear dispersions and 199 measured values with time labels (year, month, day, hour, minute, second) can be stored, and the absorption value and light transmitance can be recorded.
7. Equipped with a USB port, it can be connected to a computer for data reading or printing.
8. The main machine shell adopts molded ABS material, IP65 design, good waterproof and dustproof performance.
Principle
The instrument is based on the Spectrophotometric method, spec-trophotometry principle for water quality detection. The water sample to be tested is digested in the digester at a specific temperature and time, and then transferred to the measuring instrument. The cold Illuminant inside the measuring instrument emits light of a specific wavelength, irradiates the sample through a narrow-band interference Optical inspection system. Detector measurement of changes in transmitted or absorbed light, thereby calculating the concentration of target contaminants (such as COD, ammonia nitrogen, total nitrogen) in the sample according to the standard Linear dispersion.
Applications
Environment monitoring, sewage treatment, industrial wastewater testing, laboratory analysis, water quality census
Standards
COD Measurement Error ：≤ +/- 5%, Ammonia Nitrogen Indication Error ：≤ +/- 3% and 0.2, Total Nitrogen Indication Error ：≤ +/- %, Repeatability: ≤ 3%, Chlorine Interference Resistance: ≤ 2000mg/L (COD), Optical inspection Stability: < 0.002A/20min
Steps
1. Prepare the water sample to be tested and the required Reagent.
2. Add the water sample and Reagent to the digestion tube and put it into the digestion instrument for digestion.
3. After digestion is complete, chill down digestion tube to room temperature.
4. Put the digestion tube into the tester and select the corresponding detection items (such as COD, ammonia nitrogen or total nitrogen).
5. The instrument automatically reads the data and displays the concentration results.
6. Connect to a computer via USB port to export or print stored measurement data.
Notice
Please read the instructions carefully before use and follow the operation steps.
* Ensure that the digester and tester are clean and drying to avoid contamination affecting the results.
* Reagents should be stored properly and used within a valid period.
Please pay attention to high temperature during the digestion process to avoid burns.
* When measuring different items, use the corresponding standard Linear dispersion.
* When the instrument is not used for a long time, it is recommended to charge it regularly to maintain battery performance.
* Although the host has an IP65 Protection Rating, you should avoid prolonged immersion in water or extreme environments.
