DOS-808A Dissolved Oxygen Electricity Explanation

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Date: 2022-05-06Read: 16

Installation and replacement of dissolved oxygen membrane head and precautions:
1. Place the electricity in a vertical position and unscrew the protective cover of the film head
2. Unscrew the film head
3. Rinse the inner core of the battery with distilled water and dry it with cotton paper. After using the battery for a period of time, if black hair is found on the inner core, polish it with fine sandpaper with a grit of 1000 or more
4. After each membrane or electrolyte change, the electricity needs to be recalibrated and calibrated
5. Electrification: After being connected to an instrument, it is electrified continuously for more than two hours Calibration can only be carried out after transformation
Electric preservation
1. Short term storage: Rinse the used electrical surface with deionized water and place the electrical measuring end in deionized water.
2. * Storage: Unscrew the membrane cap and shake off the internal flushing solution. Rinse the membrane cap and metal tube separately with deionized water, and then shake dry separately. Rotate the film cap back onto the electricity, put the electricity back into the packaging box, and store it in a dry place.
Electrical calibration
1. Full calibration
Calibration in air (suitable for general users): After electrification is completed, full calibration of electricity can be performed.
2. Zero oxygen calibration
Preparation of anaerobic water: Add 250ml of deionized water to a 500ml beaker, then add 0.5g of anhydrous sodium sulfite powder, stir evenly before use.
Precautions
1. When measuring water samples (including calibrating the electrical saturation using deionized water saturated with dissolved oxygen), it is required that the water sample has fluidity. There are two methods to make the water sample meet the measurement requirements:
a、 When measuring static or slow-moving water samples, users can hold the electric cap with their hands and shake it horizontally at a speed of 20-30 cm per second.
b、 Conditional users can add a constant speed stirrer and adjust the stirring speed to stabilize the instrument reading, and then perform full-scale calibration or sample water measurement.
2. The breathable membrane of the electricity should not be damaged in any way. If the membrane is damaged or used, please replace it with a new membrane cap.
3. The internal fluid of the electricity needs to be replaced regularly. The replacement time of the internal charging fluid is related to the electrical measurement situation and frequency of use. If the user finds that the electrical performance has decreased or cannot work normally, please replace the internal charging fluid.
Electrical maintenance
1. Unscrew the membrane cap and remove the internal solution.
2. Polish the metal tube with fine sandpaper.
3. Rinse the metal tube section with deionized water and shake dry.

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