Conductivity meter composition and cleaning methods

Conductivity is the ability of a substance to carry an electric current and is the reciprocal of resistivity. In liquids, the reciprocal of the resistance, the conductivity, is often used as the measure of the conductivity. Water conductance is a very important indicator of water quality. It reflects the extent of electrolytes present in the water. According to the concentration of the electrolyte in the aqueous solution, the conductivity of the solution is also different. The solubility of the electrolyte in the dissolution was analyzed by measuring the conductivity of the solution. This is the basic analysis method of the conductivity meter.

The conductivity meter consists of a conductive electrode and an electronic unit. The electronic unit of the conductivity meter uses an AC signal of an appropriate frequency to convert the signal after amplification into conductivity. The instrument is also equipped with a temperature measuring system matched to the transmitter, which can compensate the temperature compensation system to the standard temperature conductivity, the temperature coefficient adjustment system, the conductivity cell constant adjustment system, and the automatic shift function.

Conductivity meter water samples should be determined as soon as possible after collection, such as containing large suspended matter, oil and fat, interference measurement, should be filtered or extracted. The brief steps are as follows: The platinum black electrode is first immersed in deionized water for a few minutes. Adjust the head screw M so that the pointer points at zero. Turn the calibration and measurement switch K2 to the "Calibration" position. Turn on the power switch K for a few minutes and adjust the calibration regulator Rw3 so that the pointer is on full scale. Turn the high- and low-cycle switch K3 to the proper position. Move range selector switch R1 to the proper gear. Adjust the electrode constant regulator Rw2 so that it corresponds to the constant of the electrode used. After flushing the electrode with a small amount of test solution, insert the plug into the electrode socket Kx and immerse it in the solution to be tested. After adjusting the calibration regulator Rw3 to full scale, turn the calibration and measurement switch K2 to the measurement position. Read the indicator number of the hands, multiply the multiple of the range selection switch R1, that is, the conductivity of the solution. Repeat the measurement once and take the average value. Turn the calibration and measurement switch K2 to the “Calibration” position and remove the electrode. After the measurement is completed, disconnect the power. The electrode was rinsed with deionized water and immersed in deionized water for later use.