American Technologies Network ATN PS31, Руководство оператора

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2-12 2-13
NOTE
For a pattern to be resolvable, three vertical bars and three
horizontal bars must be visible.
(7) Flip the HIGH/LOW switch to the HIGH position.
(8) Again, look through the goggles and view the projected pattern
(see Figure 2.2.). If necessary, refocus the objective lens and then
the eyepiece lens to obtain the sharpest image.
(9) The NVG must be able to resolve Group 3, Element 5, under
high light conditions to pass the test. If the goggles does not pass
the test, send it to a higher level of maintenance for repair.
NOTE
When using the TS-4348/UV Test Set, you are not viewing the
entire image intensifier. Therefore, operational and cosmetic
inspections must be done without the test set as specified in
paragraph 2.2.3.
(10) Look for flashing, flickering, or other nonstable behavior of the
image intensifier. Also check the image intensifier for other opera-
tional defects described in paragraph 2.2.3. To view the image in-
tensifier under low light conditions, flip the HIGH/LOW switch to the
LOW position and allow your eyes to become accustomed to the
dark. If any unacceptable conditions are noted, send to a higher
level of maintenance for repair.
2.2.3. INSPECTION CRITERIA FOR PROPER
IMAGE INTENSIFIER OPERATION
a. General
As directed in the Preventive Maintenance Checks and Services ta-
ble, image intensifier operation must be checked before each mis-
sion. This section provides information for the operator concerning
what to look for, how to look for it, and how to determine if the NVG
should be returned to the maintainer.
CAUTION
Perform the following inspection in the dark.
To perform this inspection, attach the goggles to the headmount
and turn the power switch to the ON position. Look through the
goggles and view the image.
(2) Turn off the room light and let your eyes adjust to the dark.
(3) Turn on the test set by setting the “OFF” switch to the “ON”
position.
(4) Turn on the goggles and insert it into the test port on the test set.
(5) Look through the goggles and view the projected pattern (see
Figure 2.2.). If necessary, focus the eyepiece lens and then the
objective lens to obtain the sharpest image.
(6) The NVG goggles must be able to resolve Group 2, Element
2, under low light conditions to pass the test. If the NVG does not
pass the test, return it to maintenance for repair. The operator must
document resolution failures on the maintenance record.
NOTE
The target shown is for
example only and is
not drawn to scale.
GROUP NUMBER
ELEMENT NUMBERS
READ THIS FOR
LOW LIGHT RESO-
LUTION FOR NVG
READ THIS FOR
HIGH LIGHT
RESOLUTION
FOR NVG
1
1
1
1
2
2
2
3
4
5
6
5
2
3
4
5
6
6
4
2
3
4
5
6
3
2
3
4
5
6
5
1
1
4
FIGURE 2.2. TS-4348/UV TEST SET PATTERN