1. Working environment 1. Ambient temperature 5-40 degrees 2. Environment Relative Humidity: 85% 2. Use, care and precautions 1. Remove the electrode protective cover before testing (the solution in the cover is 3MKCL, if the crystals ooze, it is a normal phenomenon and will not affect the use of the electrode) < p>2. Observe if the inside of the sensitive bulb is completely filled with liquid. If bubbles are found, gently shake the electrode (like a thermometer) to remove the bubbles in the detection bulb, otherwise it will affect the accuracy of the test. Calibration and testing of electrodes and pH meter 1.Connect the PH electrode to the input terminal of the PH meter and the connection is correct. 2. Perform the calibration according to the instruction manual of the instrument, and the calibration result should be measured. Third, the storage and maintenance of the liquid pH composite electrode 1. The electrode uses electrical space. Please clean the electrode with distilled water and put it in a protective bottle. It will be activated by injecting the solution before the next test. 2. If the electrode is not used for a long time, it should be rinsed and the remaining distilled water should be absorbed. 3. The sensitive glass bulb on the front of the electrode should not be in contact with hard objects, any damage and scratch will make the electrode invalid. 4. After prolonged use of the electrode, the slope and speed of response of the electrode may decrease. The measuring tip of the electrode can be immersed in 4% HF for 3 to 5 seconds or diluted HCL solution for 1 to 2 minutes and then cleaned with chlorine distilled water. Immerse in potassium solution (4M) to rejuvenate 5. If there is a substance in the tested container that can easily contaminate the sensitive bubble or block the liquid junction to passivate the electrode, the response speed will be significantly slower, the slope will be low, or the reading will be unstable, so it must be chosen according to the nature of the pollutant. Clean with a suitable solution to renew it. describe: Heating voltage: 50.2V(AC/DC) Operating Current: 5-10 mA Detectable concentration range: PH0-14 Detection temperature range: 0-80 Response time: 5S Stabilization time: 60 S Component power: 0.5 W Temperature e.g. exercise : -10 & nbsp; 50 & nbsp; (nominal temperature 20) Humidity: 95% RH (nominal humidity 65% RH) Module size: 42mm 32mm 20mm Output: Analog voltage signal output With 4 M3 mounting holes