8-2
Section 8: Model 9100 — Routine Maintenance and Test
Final Width = 215mm
8.2
Routine Maintenance
8.2.1
General Cleaning
The instrument surfaces should be kept clean, as the front panel controls are likely to be
in continuous use within a working environment. Clean when required.
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
N.B. Do not remove any covers without first disconnecting the line power lead.
The internal airflow is powered by an axial fan which blows cooling air through a
heatsink to be exhausted on the left side via a cover grille. 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, an expanded metal grille can be seen, welded to the right side
of the chassis assembly, covering two rectangular apertures into the main and rear
cavities. The reticulated filter is located over this grille and attached through it to the
chassis assembly, by five black nylon snap rivets.
The filter should not be allowed to become clogged with dust and dirt, as this will restrict
the designed airflow through the instrument. Dust can be removed using a small vacuum
cleaner to create a reverse airflow, but this will not clean off grease and other dirt which
will accumulate over time.
It is recommended that the filter element should be inspected and cleaned by
vacuuming at intervals of no more than 90 days, and should be removed for cleaning
at least once per year, immediately prior to routine calibration of the unit.
8.2.2.1
Removing the Top Cover
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.
Содержание 9100 Series
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