Revo REXN540-1 - Manual (Page 13)

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4. Apply power to the camera.
5. Set the E/I dip switch (rear side on the camera) to OFF position.
6. Set the A/I dip switch (rear side on the camera) to DC position.
7. Adjust the auto iris lens for an optimum picture using the LEVEL volume on the rear side
of the camera.
For best results, perform back focus adjustments at night or while using a #6 or #8 welder's
glass in front of the lens. The focus of the camera will change slightly if the camera iris was
adjusted on a light scene, then changes to a dark scene. However, the camera will remain
in focus if the iris was focused on a dark scene and the scene lightens.
1. The lens should be mounted on the camera before applying power.
2. If a picture is visible, focus on the picture. If the picture is not visible, open the iris on the
lens. Open the lens as wide as possible by placing the welder's glass in front of the lens
and forcing the lens to automatically open.
3. When the iris is open to the widest point, re-adjust the focus for clear picture.
If a clear picture is not possible, set the focus ring to midrange.
4. Loosen the focus adjusting fixing screw.
5. Adjust the back focus ring for a clear picture.
6. Tighten the focus adjusting fixing screw.
7. Fine tune the focus with the focus ring on the lens.
8. Remove the welder's glass from in front of the lens.
9. Adjust the iris of the lens for the best picture quality.
BACK FOCUS ADJUSTMENT