8-2 Section 8: Model 9500B — Routine Maintenance and Test
Final Width = 215mm
8.2 Routine Maintenance
WARNING Disconnect the power line
cord before cleaning - see
the Safety Issues section at
the front of this manual.
Remove dust from the top cover using a soft
brush (do not use a cloth unless it it lint-free).
Keep the controls clean using a soft, lint-free
cloth, dampened with a non-toxic, non-
corrosive detergent. The display screen should
be cleaned using a soft, lint-free cloth,
dampened with an anti-static cleanser. Avoid
extreme pressure on the face of the screen and
do not spray the screen directly.
8.2.2 Air Intake Filter
WARNING Disconnect the power line
cord before removing any
covers - see the Safety Issues
section at the front of this
manual.
The internal airflow is powered by an axial
fan which draws cooling air through the
interior (directed mainly through the RF
module) to be exhausted on the left side via
holes in the cover. Replacement air is drawn
into the instrument through holes in the right
side of the top cover, then through a 20ppi
(pores per inch) reticulated filter. This filter
is accessed by removing the top cover.
Once the cover is removed, holes can be seen
in the chassis assembly right side, with the
reticulated filter located over these holes,
attached by four black nylon snap rivets
through four holes to the chassis assembly.
Inspect and clean the filter element by
vacuuming at intervals of no more than 90
days. Remove the filter for thorough cleaning
at least once per year, immediately prior to
routine calibration of the unit.
8.2.1 General Cleaning
8.2.2.1 Removing the Top Cover
WARNING Disconnect the power line
cord before removing any
covers - see the Safety Issues
section at the front of this
manual.
The side edges of the top cover are located in
slots in both side extrusions, and secured to the
rear panel by two screws. A solid plastic block
protects each of the rear corners.
To access the filter element, remove the top
cover as follows:
1. Release the four screws securing the two
rear-corner blocks and remove the blocks.
2. Release the two screws securing the top
cover to the rear panel.
3. Pull the top cover to the rear to clear the
front bezel, then lift off to the rear.
8.2.2.2 Top Guard Shield and
Calibration Seal
IMPORTANT!
1. With the cover removed, a 'Calibration
seal' can be seen covering a countersunk
screwhead on the front of the top guard
shield. The seal is set in position following
a calibration of the instrument, so that
removal of the guard shield can be detected.
The calibration seal must NOT be broken
unless the guard shield is to be removed for
Authorized work inside the chassis
assembly.
2. Removal of the guard shield will
compromise the traceable calibration of
the instrument, and a full recalibration of
the 9500B will be required.
If removal of the guard shield is
authorized, take care to heed the SAFETY
WARNING printed on it next to the
!
symbol.
8.2.2.3 Removing the Filter
Element
The filter is removed as follows:
Carefully lever out the center pin of each of the
four black nylon snap rivets and pull out the
snap latches. Lift off the filter element.
8.2.2.4 Cleaning the Filter Element
Once the filter is removed, wash it in warm
water and household detergent, rinse
thoroughly and allow to dry.
8.2.2.5 Refitting the Filter Element
1. Hold the filter element in position to cover
the chassis holes, and the four securing
holes. Separate the latch and center pin of
a black nylon snap rivet, and push the latch
through the filter into a securing hole at the
top. Fit the center pin into the latch and
push fully home, so that the pin opens the
splits in the rear of the latch.
2. Slightly stretch the filter element into the
correct position; fit and secure the other
four snap rivets.
8.2.2.6 Refitting the Top Cover
Carefully refit the top cover into the slots in the
side extrusions, with the front edge
immmediately behind the front bezel; push
forward to locate inside the bezel, and secure
to the rear panel using the two screws. Refit
and secure the corner blocks.
8.2.2.7 Replacement Parts
Should the filter or snap rivets become damaged
by removal or refitting, the following parts can
be ordered through your Fluke Sales and
Service Center:
Part No. Description Manufacturer Type Qty
451004 20ppi Reticulated ----- ----- 1
Foam Filter
617020 Snap Rivet, Richco. SR4050B 5
Black Nylon
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