How to use the micro Moisture Meter

Trace moisture analyzer is also known as Karl Fischer moisture analyzer, and there are moisture analyzers, Moisture Meters, Moisture Meters, moisture Detectors, Moisture Meters, and moisture analyzers in the same category. It is mainly used in the detection of samples with low moisture content. After improvements in recent years, the accuracy has been greatly improved and the measurement range has been expanded.

Handle the electrolytic cell: gently shake the electrolytic cell of the trace moisture analyzer a few times, so that the water on the inner wall of the cell bottle is fully absorbed by the electrolyte, then put the electrolytic cell into the holder, turn on the stirring switch, and adjust the stirring speed , so that the liquid surface forms a small vortex; insert the measuring electrode plug and the electrolytic electrode plug into the corresponding socket of the host, and make them in good contact, and turn on the electrolytic switch. Note: In the state of overiodine, the green lights of the measurement signal indicator and the electrolysis signal indicator are all off, and only one red light is on respectively, and the digital display does not count.

Adjust the balance of the electrolyte: If the electrolytic cell is still in the state of deep iodine, use a 50ul micro-injector to extract 10ul of distilled water each time, wipe the needle with filter paper, press the start button, and divide it through the hole in the middle of the sampling cock for several times. Inject below the liquid level of the electrolytic cell, inject at any time and observe the color change of the electrolyte at any time, until the electrolyte turns light yellow, the green light of the measurement signal light and the electrolysis signal light indicate, and the counter starts counting. (When fresh electrolyte is used and the cell bottle is dry, about 30~50ul of water needs to be injected.) After the counting stops, stop stirring, pick up the electrolytic cell and shake it gently for a few times, and make the inner wall of the cell bottle The moisture is absorbed, and the calibration can be carried out after the end point alarm. (The electrolyte that has just been replaced is sometimes not stable. At this time, about 2~3ul of distilled water can be injected to make it count 2000~3000ug, which is convenient for faster stability.)

Calibrate the trace moisture analyzer: After the electrolyte is stable, draw 0.3ul distilled water with a 0.5ul micro sampler, wipe the needle with filter paper, press the start button, inject below the liquid level, the instrument starts counting, reaches the end point, and displays 300± 30ug water, continuously calibrated for 2~3 times, and the counting values ​​are all within the required range, indicating that the instrument is accurate. (Explanation: The error of the fast moisture analyzer itself is not more than ±0.3%, but considering that the micro sampler has a capacity error of ±5% and human operation error, when using distilled water (100%) for calibration, the allowable error is within ± within 10%.)