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When choosing a conductivity sensor, there are many factors that need to be tested, such as measurement range, measurement accuracy, electrode material, compliance with regulatory requirements, temperature and pressure resistance, corrosion resistance, installation method, anti-interference ability, maintenance calibration, after-sales service, etc. Many factors.
Common dielectric conductivity range and electrode selection:
Conductivity electrode calibration:
On-line conductivity meter, because of long-term measurement in solution, the electrode constant may have a certain deviation, so it needs to be calibrated regularly to ensure the accuracy of the measurement results of the instrument. The common calibration cycle in general industrial field is 3 months, 6 months, 1 year, etc. According to specific working conditions, it is necessary to formulate a suitable calibration cycle. (JJG 376-2007 Conductivity Meter Verification Regulations require that the longest verification period of the Conductivity Meter cannot exceed 1 year)
Common conductivity meters can perform single-point calibration of any standard solution. When calibrating, temperature compensation is generally considered (temperature will affect the conductivity value, the JJG 376-2007 conductivity meter verification regulation requires the conductivity meter to be calibrated at 25°C), enter the calibration to be calibrated on the controller calibration interface Calibrate the liquid value (common calibration liquids are 84.0μS/cm, 1413μS/cm and 12.88mS/cm, and they can also be prepared on site). Special attention should be paid to that the calibration solution must be brand new and uncontaminated, and the used standard solution cannot be reused.