(1) For the adjustment procedure, it is necessary to use a 0.2mm spaced
metallic (stainless steel or copper) wire mesh of 2/1Omm diameter which can be
attached, with masking tape, to the spot-film device directly beneath the intensifier tube.
This screen provides an adequate image to ensure proper focusing.
(2) With the screen in place, initiate a fluoroscopic exposure and begin
adjusting. To obtain a correct image, first check output voltages V4 (+2.5 to 3.0kvdc)
and V5 (+27 0.15kvdc). Then, adjust the g1 electrode voltage, V1, by means of
adjusting potentiometer P8 clockwise from the extreme counterclockwise position until
the size of the image goes through a maximum size. Stop just beyond the maximum
size. Then adjust the g2 electrode, V2, by means of potentiometer P5 until optimum
focusing is obtained. Slightly re-adjust the g1 electrode voltage, P8, in both directions
to determine the optimum focus position. Once the image is satisfactorily adjusted,
discontinue the exposure and replace the power supply's outer cover.