Do you know how to replace the electrode diaphragm of a dissolved oxygen meter?
The online dissolved oxygen meter is a highly intelligent online continuous monitor. It can be equipped with polarographic electrodes or high-precision constant voltage electrodes to automatically realize a wide range of measurements from ppb level to ppm level. It is an instrument for measuring oxygen content in liquids in boiler feed water, condensate water, environmental sewage and other industries. It has the characteristics of fast response, stability, reliability and low usage cost, and is suitable for large-scale use in thermal power plants. So do you know how to replace the electrode diaphragm of the dissolved oxygen meter? Let me teach you how to replace the electrode diaphragm of the dissolved oxygen meter:
1. If the meter is running, cut off the power supply first and take it out of the measuring cell at eight o'clock.
2. Remove the electrode from the analyzer. The electrode structure is as shown in the figure.
3. Hold the electrode vertically with the electrode facing up, unscrew the membrane pressure cap, take out the old membrane from the membrane pressure cap, and rinse the membrane pressure cap and new membrane with pure water. Place the new film inside the film pressure cap with the black dot facing up.
4. With the electrode facing downward, unscrew the sealing screw on the side of the electrode to allow the electrolyte to flow out, and then tighten the screw.
5. Rinse the gold cathode with pure water, and then use a soft tissue to gently absorb the water droplets attached to the surface of the gold cathode.
6. Turn the electrode upward and vertically, and use a syringe to inject electrolyte into the electrode through the hole on the electrode until the electrolyte overflows. This ensures that there are no air bubbles inside the electrode.
7. Screw the membrane pressure cap on the electrode, use the membrane installation tool to tighten the membrane pressure cap, then loosen it a little, and then tighten it again.
8. Rinse the electrode thoroughly with purified water, and gently absorb the water droplets on the electrode and membrane surface with a soft paper towel. Pay special attention not to force the electrode membrane.
Precautions:
1. Do not touch the surface of the gold cathode with your hands. The damaged grease will affect the electrode characteristics.
2. The electrolyte contains less than 1% potassium hydroxide. Try to avoid contact with your eyes. If you accidentally contact your eyes, rinse them quickly with plenty of water.
3. There is no harm in short-term contact with skin, just rinse with water.
