Maintenance; Maintenance (Monthly); Periodic Inspection (Every 3 Months); Replacement Of Consumables - Optex DOS-20 Instruction Manual

Optical dissolved oxygen sensor

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Maintenance

・ To clean the sensor, lightly wipe with a clean, soft cloth and

water diluted with a mild detergent, and then wipe with a dry,

Caution

soft cloth.

・ Do not wipe the sensor with organic solvent such as benzine.

Perform the following operations every month.

・ Clean the measurement block using tap water.

・ Inspect the measurement block for damage and/or degeneration.

・ Inspect the sensor cable for damage and/or degeneration.

・ Inspect the installation bracket for corrosion.

・ Immerse the sensor in measurement water of the known concentration

and check that the correct value is displayed on the transmitter.

Perform the following inspections every 3 months.

・ Terminal block screws of the transmitter are not rusted.

・ Replace the sensor cap every year.

・ Purchase the replacement sensor cap (DOS-CP) for replacement.

The sensor is designed to be able to measure stably for a prolonged period

of time. In order to maintain the reliability of measurement, however,

calibration should be carried out at least once a year (Refer to "9 Calibration").

If the sensor is not used over a prolonged period, perform the following

operations.

1. Detach the sensor cable from the transmitter.

2. Drain off the water from the sensor and clean it.

3. Store the unit away from direct sunlight.

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