169E Water Quality Waterproof LCD Digital ORP Meter

Battery installation

If the display is blurred or not displayed, the battery should be replaced in time. Replace the battery, unscrew the upper cover, you can change, pay attention to battery polarity.

• 1. when the electrode is used for the first time or is not used for a long time, the electrode bulb and the sand core are dipped in the 3NKCL solution for 8 hours to be activated.
• 2. The external reference solution of the 2. electrode is 3NKCL solution.
• 3, if the electrode is placed for a long time, and the sensitive bulb is exposed in the air, because the influence of electrode drying, slow and unstable, then soak the electrode for hours in the activation of saturated potassium chloride solution, in order to improve the performance, at least once a week, the electrode bubble of potassium solution in saturated chlorine, every time a few minutes.
• 4. Glass electrode is easy to break. Use it carefully. If there is inorganic salt deposit on the electrode bulb, the electrodes are dipped into the solution for about 5 minutes to recover the performance, and the 0.1HCL solution is 5 minutes.
• 5, grease film also affect the measurement of glass bubble, to remove the film, rinse glass bulb with 75% alcohol solution, dry with filter paper, rinse with water and immerse in saturated KCL solution for several hours.