Product Overview - Hach POLYMETRON 8544 Manuel D'utilisation

This symbol indicates that the marked item can be hot and should not be touched without care.
This symbol identifies the presence of a strong corrosive or other hazardous substance and a risk of
chemical harm. Only individuals qualified and trained to work with chemicals should handle chemicals
or perform maintenance on chemical delivery systems associated with the equipment.
This symbol indicates the need for protective eye wear.
This symbol indicates the need for protective hand wear.
This symbol indicates that the marked item requires a protective earth connection. If the instrument is
not supplied with a ground plug on a cord, make the protective earth connection to the protective
conductor terminal.
Electrical equipment marked with this symbol may not be disposed of in European domestic or public
disposal systems. Return old or end-of-life equipment to the manufacturer for disposal at no charge to
the user.

Product overview

The POLYMETRON model 8544 is a cleaning system for electrodes. There are two models:
• Air or water electrode cleaning system: Models 8544.1 (220 V), 8544.2 (110 V) and
8544.3 (24 V). An electrovalve supplies air or water to the sensor tip. Refer to
• Chemical electrode cleaning system: Models 8544.4 (220 V), 8544.5 (110 V) and 8544.6 (24 V).
A twin chamber hose pump uses an air–instrument to supply a measured volume of a cleaning
fluid with a nozzle that is installed immediately below the sensor tip. Refer to
The manufacturer recommends that a junction box is used to connect the POLYMETRON
9500 series or SC200 controller to the system as shown in
interval is configured at the controller. Refer to
ordering information.
Figure 1 and
Replacement parts and accessories
Figure 1.
Figure 2.
Figure 2. Then, the cleaning
on page 16 for
English 5