Hach POLYMETRON 8810 ORP Manuel D'utilisation De Base page 26

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General

For periodic maintenance, all the elements are freely accessible on the front panel.

For installation of accessories and specialized service work the analyzer is easily accessible from all

sides with some simple manipulations. The electronic control and analytical units can be accessed

and removed after opening the front of the analyzer with the special key provided.

Maintenance schedule

The schedule is dependent on the type of application. In general we can say that a monthly

maintenance is required to perform the following tasks:

• Check all reagent and chemical containers. Refill if necessary

• Disconnect the tubing and replace the other way round

• Every 2 months replace all the tubing

• Check the measurement chamber and electrodes for any deposits. Clean if visibly contaminated

• Check all tube connections for any leaks

• Check the system is running smoothly. Calibrate if necessary

Cleaning and decontamination

The analyzer does not normally require any cleaning or decontamination.

If needed, clean the exterior of the instrument with a moist cloth and a mild soap solution. Never use

cleaning agents such as turpentine, acetone or similar products to clean the instrument, including the

display and any accessories.

Shutdown

Stopping the measurement cycle

Select STOP in the main menu and press Enter. The message stopped is displayed.

Short shutdown (e.g. weekend)

Select STAND BY in the main menu and press Enter to put the system in a defined standby

condition. The measurement chamber is drained, rinsed, and refilled with rinse water.

Prolonged shutdown

If the system is shut down for a long period of time the electrodes must be cleaned and the

measurement chamber rinsed. It is preferable to then remove the electrodes and store them in a

buffer solution until the system is restarted. Under no condition must the electrodes be left in an

empty measurement chamber as this will cause them to dry out and become damaged. Finally, turn

the power off.

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