a. Before operating the test stand, the mechanical zero of the panel meters
should be verified. The seven operating panel meters are shown in foldout 5. The
zero adjustment is located below the lens in the center part of the meter. The
meters are zeroed by turning the adjustment screw. Clockwise rotation will swing
the pointer to the right--counterclockwise to the left.
b. The tachometer and battery need to be checked at periodic intervals.
These checks were discussed in the previous lesson and will not be covered here.
c. To preclude damage to the system being tested and the test stand, the
switches and controls need to be preset before doing any tests. Table 1 lists the
controls and their positions. To prevent damage, it is important to preset the
controls to the positioning indicated prior to operating the test stand.
Table 1.
Presenting controls keyed to foldout 5.
OS 010, 4-P2
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