Maintenance
Introduction
4
4-3
4-1. Introduction
This section covers procedures that do not fall into the category of troubleshooting or
repair. This includes access procedures, installation of the Wideband module (Option -
03), periodic cleaning, and other special service procedures.
4-2. Cleaning the Air Filter
CAUTION
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
calibrator is operated in a dusty environment. The air filter is accessible from the rear
panel of the calibrator.
To clean the air filter, refer to Figure 4-1 and proceed as follows:
CHASSIS
GROUND
S2 S3 S4
FUSE -F1
!
F4-1.EPS
Figure 4-1. Air Filter
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.
3. Reinstall the filter element, its retainer, and the knurled screw.
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