OPERATIONS MANUAL
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To access and clean the air filters, proceed as follows:
1. Disconnect line power.
2. Remove the filter retainer by holding its two upper corners or two lower corners and pulling it
outward until it disengages from the fan guard.
3. Remove the air filter that is in between the Filter Retainer and Fan Guard. See figure 5.3b.
4. Clean the filter by washing it in soapy water. Rinse and dry it thoroughly before reinstalling.
5. Place the filter at the back of the retainer.
6. Reinstall the retainer in the fan guard. The retainer is snapped on the four sides for the fan
guard.
Figure 5.3b: DTS-2990 Fan Filter Assembly
5.4
Cleaning the Instrument External Surface
Clean the exterior of the instrument using a soft cloth slightly dampened with either water
or a non-abrasive mild cleaning solution that is not harmful to plastics.
CAUTION
Do not use hydrocarbons or chlorinated solvents for cleaning. They can damage the plastic
materials used in the Instrument.