maintenance/
troubleshooting
90
SYNRAD OEM v40 Operator’s Manual Version 4
Maintenance
3
Remove loose contaminants from the optic by holding a clean air bulb at an angle to the optic and
blow a stream of air at a glancing angle across the lens surface. Repeat as necessary.
4
Dampen a cotton ball or fluffed cotton swab with the selected cleaning agent. Ethyl alcohol (least
aggressive) is best for initial surface cleaning. Acetone (moderately aggressive) is best for oily residue
or minor baked-on vapors and debris.
Important Note:
If acetone is used as a cleaning solvent, a second follow-up cleaning of the optical
surface using ethyl alcohol is required.
5
Gently wipe the optical surface with the damp cotton beginning in the center of the optic and work-
ing outward. Do not rub or apply any pressure, especially when using a cotton swab. Lightly drag
the cotton ball or swab without applying any downward pressure.
Note: Use a clean cotton ball or fluffed swab on each pass. The cotton will pick up and carry surface
contaminants that may scratch optical surfaces if reused.
6
Carefully examine the optic under a good light. Certain contaminants or damage such as pitting
cannot be removed. In these cases the optic must be replaced to prevent catastrophic failure.
7
Repeat Steps 4 through 6 as required, removing all traces of contaminants and deposits.
