Skills of using the residual chlorine detector flexibly

The residual chlorine detector can quantitatively detect the content of residual chlorine on site, with a high degree of intelligence, simple and convenient operation. Equipped with a reference channel, the detection accuracy is high, avoiding operational errors during the detection process, and supports massive detection data storage, printing, data analysis, and chart display, and the results are simple and clear. Tips for use: 1. The reagents must be added in order in advance, and then add the blank or the water sample to be tested after mixing, otherwise the color will not develop normally. 2. It is best to compare the color immediately after adding the water sample to prevent fading. 3. Do not shake the high-concentration water sample violently to prevent free chlorine from overflowing. 4. The solution after the colorimetry is completed cannot be dumped at will, but should be collected uniformly and processed centrally. How to use: 1. Turn on the machine and preheat the machine for 2 minutes. 2. Pour the liquid to be tested into cuvette 1, and fill it to two-thirds of its volume. The process of putting in requires water stains not to reach the outside of the cuvette. Put this cuvette 1 into the measuring pool; press the calibration key to make the instrument display 0.00mg/L. 3. Take 100ML of the solution to be tested, add 15ML of the buffer reagent, add 5ML of the DPD reagent, and press the confirmation button; at this time, the screen display of the instrument decreases from 60 to 0; at this time, pour the solution to be tested with the reagent into the ratio Color cell 2; put the color cell 2 into the measuring pool, and the displayed degree is the residual chlorine content. 4. Press the storage key and the extraction key to store and extract 20 experimental records respectively. Precautions for operation of residual chlorine detector: 1. Chloride ions are not included in the measurement of residual chlorine. Chlorine measurement includes the measurement of free chlorine and combined chlorine content. 2. For the determination of free chlorine, the pH must be 6.2---6.5, and the DPD reagent should be added for direct reaction to generate a red compound. If the pH value is out of range, please adjust it with buffer reagent or dilute acid or dilute alkali. 3. The principle of the method for measuring total chlorine: when the pH is 6.2--6.5, add excess potassium iodide, add DPD to react directly, and generate a red compound. If the pH value is out of range, please adjust it with buffer reagent or dilute acid or dilute alkali. 4. The turbid sample must be filtered before measurement. 5. The color sample cannot be measured. 6. The cuvette should be cleaned and stored dry after each use.
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