Problems with the use of conductivity meter and the use of electrodes - News - Global IC Trade Starts Here Free Join

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Many users have some understanding of the use of the conductivity meter and how to use the electrode. I also know how to use it specifically, but some users may not understand it when using it. For example, how to operate the conductivity meter before and after the power is turned on, how to detect any problems before use, or where the components are not activated, these similar problems, I will analyze the following, let the users more A little understanding.

Before turning on the power switch, observe whether the hands indicate zero. If you do not know the zero, you can adjust the screws on the meter to make the hands zero. Move the calibration and measurement switches to the calibration position. Plug in the power cord, turn on the power switch, and warm up for a few minutes to adjust the regulator to make the meter full indicator. When the first 8 ranges are used to measure a liquid with a conductivity lower than 300, a low cycle is selected, and the plate can be lowered to a low cycle. When the next 4 ranges are used to measure a liquid with a conductivity in the range of 300 to 10,000, it will be pulled to a high circumference. Pull the range selector switch to the required measurement range. If you do not know the conductivity of the solution to be tested beforehand, you should first pull it to the maximum conductivity measurement file and then lower it step by step to prevent the needle from bending.

Measurement reading: Generally, the knob for measuring its constant is hit to 1.0. Before the measurement, the ADI is rotated to the maximum value, and then slowly adjusted. The measurement switch is turned to the calibration file to adjust the zero point, select the range, and then The measuring switch is hit to the measuring position and then the electrode is used for reading: the electrode holder is used to clamp the electrode of the electrode, and the electrode holder is used to fix the electrode to the electrode rod. When the conductivity of the solution to be tested is less than 10, a DJS-type 1 bright electrode is used. At this time, R should be adjusted at a position corresponding to the constant term of the associated electrode. For example, if the matching electrode has a constant of 0.95. R should be adjusted at 0.95, if the constant of the matching electrode is 1.1, then R should be adjusted to 1.1. When the conductivity of the solution to be tested is in the range of ~, a DJS - type 1 platinum black electrode is used. R should be adjusted at a position corresponding to the constant of the matched electrode. When the conductivity of the solution to be tested is greater than that which can be measured with a DJS-type Platinum Black electrode, a DJS-type 10 platinum black electrode is used. At this time, the R should be inserted into the socket at the constant position of the matched electrode, and the fastening screw on the socket should be tightened to immerse the electrode in the solution to be tested. Then correct, when measuring with 1~8 range, the correction is at low week. When using the 9~12 range measurement, the calibration will be turned to the high circumference, and the calibration will be adjusted to adjust the fullness of the indicator needle. Note: In order to improve the measurement accuracy, when using the two positions of × and ×, the correction must be made when the electrode is inserted into the socket and the electrode is immersed in the solution to be tested. Thereafter, the measurement will be pulled, and the magnification of the indicator number multiplied by the range switch is the actual conductivity of the liquid to be measured.

When measuring high-purity water with 0~0.1 or 0~0.3, first insert the electrode lead into the electrode socket, and adjust the meter to the minimum value before the electrode is immersed in the solution. Then start measuring. If you want to understand the change in conductance during the measurement, connect the 10mV output to the automatic potentiometer. The range switch is pulled at ×0.1 and pulled in the low cycle. However, when the electrode of the conductivity cell is not plugged into the electrode, the meter has an indication, which is a normal phenomenon, because the electrode socket and the wiring have a capacitance. As long as the adjustment: capacitance compensation can adjust this indication to zero, do not have to do this, just wait for the electrode lead to be inserted into the socket, then adjust the indication to the minimum value. When using odd-numbered files, look at the scale above the surface; when using even-numbered files, look at the scale below the surface.