Cleaning The Air Filter; General Cleaning - Fluke 5790B/3 Operator's Manual

5790A
Operators Manual

8-3. Cleaning the Air Filter

Damage caused by overheating may occur if the area around
the fan is restricted, the intake air is too warm, or the air filter
becomes clogged.
The air filter must be removed and cleaned every 30 days or more frequently if the
5790A is operated in a dusty environment. The air filter is accessible from the rear panel.
To clean the air filter, refer to Figure 8-2 and proceed as follows:
1. Remove the filter element.
a. Unscrew the knurled screw at the top of the air filter (counterclockwise).
b. Pull the air filter retainer downward; it hinges at the bottom.
c. Remove the filter element.
2. Clean the filter element.
a. Wash the filter element in soapy water.
b. Rinse the filter element in fresh running water.
c. Shake out the excess water, then allow the filter element to dry thoroughly before
reinstalling it.

8-4. General Cleaning

To keep the 5790A looking like new, clean the case, front panel keys, and lens using a
soft cloth slightly dampened with water or a non-abrasive mild cleaning solution that
does not harm plastics.
8-4
 Caution
CHASSIS
GROUND
FUSE -F1
S2 S3 S4
Figure 8-2. Accessing the Air Filter
JOHN FLUKE MFG.CO., INC
MADE IN U.S.A
VARIOUS ASPECTS OF THIS INSTRUMENT ARE PROTECTED BY
ONE OR MORE OF THE FOLLOWING U.S. PATENTS.
4803457, 4860289, 4901052, 4716398, 4847507
NO INTERNAL USER SERVICEABLE
PARTS. REFER SERVICE TO QUALIFIED
SERVICE PERSONNEL
TO CLEAN FILTER, REMOVE
FROM INSTRUMENT AND FLUSH
WITH WARM SOAPY WATER
CAUTION:
FOR FIRE P ROTECTION REPLACE
ONLY WITH A 250V FUSE OF INDICATED RATING.
VOLTAGE VOLTAGE
FUSE-F1 FUSE-F1
SELECTION SELECTION
S2 S3 S4 S2 S3 S4
100V T 1.5A 200V T .75A
110V 220V
250V 250V
115V (SB) 230V (SB)
120V 240V
RS 232C
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