About the operation steps and precautions of tap water turbidity monitor
Turbidity is the performance of suspended matter in water to hinder the degree of light passing through. Suspended solids and colloids such as soil, dust, fine organic matter, zooplankton and other microorganisms in the water can cause turbidity in the water. Tap water turbidity monitor, also known as tap water turbidity monitor. It can be used to test the turbidity of water samples in water plants, power plants, industrial and mining enterprises, laboratories and field sites, so it is very important to master the correct method of use. Operation and use of tap water turbidity monitor: 1. Carefully check the turbidity standard plate. If there is dust or stains, use absorbent cotton, ethanol, and half and half mixture to wipe it off. The cuvette can be cleaned with detergent or detergent, and then rinse with water Rinse off and wipe dry on both sheer sides. The instrument is warmed up for 10 minutes. 2. Set the range selection button to '100', and insert the turbidity standard plate to the right behind the sample tank. 3. Push the pull rod in, do not put any object in the optical path, adjust the 'zero adjustment' knob to make the display read '0' (air zero calibration), pull the pull rod out, put the turbidity standard plate into the optical path, and adjust The (calibration) knob makes the display read the factory calibration value of the turbidity standard plate—NTU. After that, the “calibration” knob cannot be changed at will, and the standard plate is taken out. 4. Range '1'; '10' adopts 30mm cuvette. Range '100' adopts 5mm cuvette. The 5mm cuvette is inserted next to the right. 5. Put turbidity-free water (about 3/4 height) into the cuvette, put it in front of the sample tank, and put the liquid under test into the back of the sample tank (both large and small cuvettes are close to the right side), push Insert the pull rod, adjust the 'zero position' button to make the displayed number 0. Pull out the pull rod, put the sample into the optical path, and the displayed value is the turbidity value NTU of the measured liquid. 6. If the 'Range' selection key needs to be switched during measurement, in addition to selecting a different cuvette, the zero-adjustment step with turbidity-free water must be repeated once. 7. The standard plate of the instrument has been calibrated with standard solution before leaving the factory. If the user needs to re-calibrate, just use 10FTU standard solution and zero turbidity water to reverse the above steps and re-measure the calibration value. Precautions for tap water turbidity monitor: During the measurement, there must be no dirty spots in the two-way optical path of the cuvette, and no water stains on the two sides and the bottom. If you use an old cuvette to hold samples and put '0' water in the measurement, you must put '0' water at the same time before the sample test to measure the other position difference (cylinder difference) of the two sample cups, and in the future Corresponding corrections are made in the measured value of the sample turbidity. If there are few samples to be measured, the same cuvette can be used for zero calibration and sample measurement, so that no matter the old cuvette is reported by the agency, it will not be brought into the tank, which is conducive to the reliability of test data and avoids unnecessary operational errors.