three. working environment: 1. Ambient temperature 5-40 degrees 2. Relative humidity of environment: ≤85% four. Use maintenance and matters needing attention: 1. Remove the electrode protective cover before the test, (the solution in the cover is 3.3mol/lKCL, if there is crystal seepage, it is a normal phenomenon and does not affect the use of the electrode) 2.Observe whether the inside of the sensitive bulb is filled with liquid. If bubbles are found, shake the electrode down gently (like a thermometer) to remove the bubbles in the sensitive bulb, otherwise it will affect the test accuracy. 5. Calibration and testing of electrode and PH meter 1.Connect the PH electrode to the input terminal of the PH instrument, and the connection is correct. 2. Calibrate according to the instrument manual, and the calibration result will be measured
