Getting Started

First-Time Use Precautions

Note: The bottle cap of the probe contains protective liquid (3.3mol/L KCL). Even if the bottle cap is screwed tightly, some protective liquid may still leak around the bottle cap, forming white crystals. But as long as there is still protective liquid in the bottle cap, it will not affect the life and accuracy of the probe. So please use it with confidence. It is recommended that the white crystals be poured back into the protective liquid in the bottle cap.

Do not immerse the plug in water before tightening the cable connector to the device connector.

Electrode Preparation

Passivation can occur on the surface of the metal ring of the sensor electrode, leading to reduced response and affecting normal equipment use. If the device has not been used for more than 3 days and the response is abnormal, the surface of the metal ring at the electrode measuring end should be polished with fine sandpaper of 1000 grit or higher to restore the response. Handle the metal ring carefully when polishing, as it is connected to the glass.

Installation Method

Flow-through installation: The measuring end is completely submerged in the liquid being tested to ensure a stable flow rate and no air bubbles. It is recommended to control the flow rate at 30-60 L/h to ensure the accuracy of the test.

Precautions and Maintenance

• After use, clean the electrode head with water and replace the protective cap.
• During measurement, ensure the liquid being measured is flowing and at a uniform flow rate, and that there are no air bubbles adhering to the measuring end.
• The device itself generally requires no routine maintenance. In case of obvious malfunction, please do not attempt to repair it yourself; contact us immediately!
• If the electrode diaphragm is contaminated with dirt or minerals, the sensitivity will decrease, potentially preventing accurate measurements. Ensure the platinum ring is clean.
• A good residual chlorine electrode should always have a clean and shiny platinum sensing ring. If the platinum ring becomes rough or covered with contaminants after measurement, clean it as follows (for reference):
  1. Inorganic contamination: Immerse the electrode in 0.1 mol/L dilute hydrochloric acid for 15 minutes. Gently wipe the platinum ring of the residual chlorine electrode with a cotton swab, then rinse with tap water.
  2. Organic matter or oil contamination: Immerse the electrode in tap water with a small amount of detergent, such as dish soap, to thoroughly clean the sensing surface of the electrode sensor. Gently wipe the platinum ring of the electrode with a cotton swab, then rinse with tap water. If an oxide film has formed on the platinum ring, lightly polish the sensing surface with toothpaste or 1000-grit sandpaper, then rinse with tap water. Handle the platinum ring carefully when polishing the glass connection.
• The electrode's lifespan is approximately one year. Replace the electrode promptly after it ages.