TM 5-3610-257-14
(d)
Loosen locknut on CALIBRATE screw.
(e)
Press and hold CALIBRATE button.
NOTE
If no humming sound is heard, proceed to step (g).
(f)
Turn CALIBRATE screw to right until humming sound stops.
(g)
Slowly turn CALIBRATE screw to left until humming sound just starts.
(h)
Tighten locknut.
(i)
Release CALIBRATE button.
(2)
Multicolor Phototube. Cameras with color phototubes are normally adjusted to provide a 10 second
exposure cycle with 100 time units and left DENSITY dial set at .00.
3-20
