1-10. IMAGE INTENSIFIER
a. General Maintenance. The 1-7802 image intensifier system requires a
minimal amount of maintenance, especially when in use. It is recommended the
painted metal portions of the intensifier system be wiped down with a damp cloth, and
the outer lens and viewing mirror cleaned with lens tissue and lens-cleaning solution
every 30 days. This will prevent dust accumulation which can affect operation of the
b. Storage Maintenance. When the intensifier system is not in use for an
extended period of time or when it is being stored, it becomes necessary to "season"
the intensifier tube. "Seasoning" is done by applying electrical current to the tube for a
24 hour period.
(1) If the tube has been installed and has been idle for an extended period
of time, such as four to six months, power can be applied to it through the spot-film
device. Check to make sure the power supply cord is connected to the spot-film device
control panel, then turn the power on and let it run for 24 hours before operating.
(2) If the tube is being stored, "season" the tube every six months. In its
uninstalled state, power to the tube can be applied by using the auxiliary power cord
supplied with the system. The auxiliary cord is equipped with a bulkhead receptacle
which will accept the bulkhead plug on the power supply cord. Once the auxiliary cord
and the power supply cord are connected, the auxiliary cord can be plugged into any
120vac line. Allow current to run to the tube for 24 hours.
c. Image Tube Focus. The potentiometers for focus adjustment of the
intensifier tube are located on the left side of the power supply, and are labeled. The
outer cover of the power supply must be removed to gain access to these
The screwdriver used to adjust P2 must have an insulating shaft and
handle. The potentiometer slider is at 3,800 volts with respect to
ground, and the insulation value between the slider and the
potentiometer shaft is only 1,000 volts.