Many users have a basic understanding of how to use a conductivity meter and its electrodes, but some may still feel unsure when actually operating the device. For example, they might not know how to properly prepare the meter before turning it on, or what steps to take if the device isn't working correctly. This guide will walk you through the process step by step, helping you gain more confidence in using the equipment effectively.
Before turning on the power, check if the needle is at zero. If not, adjust the calibration screw to bring it back to zero. Set the calibration and measurement switch to the calibration position. Plug in the power cord and turn on the device. Allow it to warm up for a few minutes, then adjust the regulator until the needle reaches full scale. When measuring a liquid with a conductivity below 300, use the low range setting. For conductivities between 300 and 10,000, switch to the high range. Always start with the highest range if you're unsure of the sample's conductivity to avoid damaging the needle.
To take a reading, set the constant knob to 1.0. Before measuring, rotate the ADI to its maximum value and slowly adjust it down. Place the switch in the calibration mode to zero the meter, then select the appropriate range. Switch the measuring dial to the measurement position and insert the electrode into the solution. Use the electrode holder to secure the electrode to the rod. For solutions with conductivity less than 10, use a DJS-1 bright electrode. Adjust R to match the electrode’s constant (e.g., 0.95 or 1.1). For higher conductivities, use a DJS-1 platinum black electrode, and for very high conductivities, use a DJS-10 platinum black electrode. Ensure the R is properly seated and tightened in the socket.
When measuring high-purity water (0–0.1 or 0–0.3), first plug the electrode into the socket and adjust the meter to the minimum value before submerging it in the solution. If you want to monitor changes in conductivity during testing, connect the 10mV output to an automatic potentiometer. Use the ×0.1 range in the low cycle. Note that the meter may show a reading even without the electrode plugged in due to capacitance between the socket and wiring. This is normal, and you can adjust it to zero once the electrode is inserted. When using odd-numbered ranges, read from the upper scale; for even-numbered ranges, use the lower scale. Always multiply the displayed value by the range setting to get the actual conductivity of the solution.
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