Helmet-Mounted Devices Flashcards
(37 cards)
What two major components make up the HDU
helmet and DU
What connects the two HVI cable segments
QDC
What is the major difference between a visor used with the standard HGU-55/P and one used with JHMCS, and are they interchangeable?
JHMCS displays symblogy and must be fitted to te mask. no
What is the major difference between the iftting process of a standard 55/P and the 55A/P used for the JHMCS.
HMD to pupil aligning
How do you determine the IPD of an airctew member
measure the distance from the center of one pupil to another in MM
Where is the UHVI located
the upper HVi is the portion of the cabling that goes between the helmet liner and the helmet to the HRC (helmet release connector)
What component of the PLZT goggles provides a self check of its operation
PTT actuator actuator located above the left front lens on the external frame assembly
Explain what events must take place before the EEU-2/P goggles go into the open mode.
the 2 wire bails on the goggles must join with the top latch connector on the visor. Then, the correct electrical power must be applied to the PLZT wafer.
Once in servo mode, what happens if additional hazardous light pulses are detected?
closed mode is re-triggered and servo mode restarts
What part of the NVGs allow the intensification of the vision?
IIT
Why must you never use an AA alkaline battery instead of a lithium
not enough voltage
What will occur if you force the binocular out of the locked position?
It wont stay stowed and will bounce around in flight
What should you do if either of the compartments should fail during the battery compartment test?
replace mount
What is the maximum range of tilt for the AN/AVS-9(V)
10 degrees
What is the range of vertical travel for the AN/AVS-9(V)
25MM
What does fine tuning the focus once the diopter is adjusted do?
- assures aircrew that diopter adj. preforms satisfactory
2. allows and accurate assessment of NVG preformance
What are the minor adjustments an aircrew will do as required?
vertical, tilt, eye relief adj.
How may image intensifiers does the PNVG have
4
What size are the PNVG ITTs
16mm
The PNVG eyepiece lens have a fixed focus engineered at the factory of what?
fixed focus of -1.0 diopeter
Why do ALEP devices have control numbers?
Manufacturer tracking in event of query
How often do you inspect the ALEP spectacles?
on recipt and 180 days there after
What inspection criteria do you use to inspect the lens for scratches?
inspection critera from AFI 11-301 V4 CH 5
What component of the EEU-2/P goggles internal lens holder assembly is replaceable?
Controller
