Clean The Instrument; Replace The Desiccant - Hach AS950 Manual Del Usuario

Section 7 Maintenance
Multiple hazards. Only qualified personnel must conduct the tasks described in this
section of the document.
Electrocution hazard. Remove power from the instrument before doing maintenance or
service activities.
Biohazard exposure. Obey safe handling protocols during contact with sample bottles
and sampler components.
Multiple hazards. The technician must make sure that the equipment operates safely and
correctly after maintenance procedures.
Do not disassemble the instrument for maintenance. If the internal components must be cleaned or
repaired, contact the manufacturer.

7.1 Clean the instrument

Fire hazard. Do not use flammable agents to clean the instrument.
If water is not sufficient to clean the controller and the pump, disconnect the controller and move the
controller away from the sampler. Allow sufficient time for the controller and pump to dry before the
parts are re-installed and put back into service.
Clean the sampler as follows:
• Sampler enclosure—Clean the internal and external surfaces with a damp cloth and a mild
detergent. Do not use abrasive cleaners or solvents.
• Sample bottles—Clean the bottles with a brush and water and a mild detergent. Rinse with fresh
water and then with distilled water. Use an autoclave to clean glass bottles if necessary.

7.2 Replace the desiccant

A desiccant cartridge in the controller absorbs moisture and prevents corrosion. Monitor the
desiccant color through the window. Refer to
green, replace the desiccant.
1. Unscrew and remove the desiccant cartridge. Refer to
2. Remove the plug and discard the spent desiccant.
3. Fill the desiccant tube with fresh desiccant.
4. Install the plug.
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D A N G E R
D A N G E R
W A R N I N G
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C A U T I O N
Figure 13. Fresh desiccant is orange. When the color is
Figure 13.