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Cleaning Information
Safety Precautions
E.1 Safety Precautions
Please follow the following safety rules:
• Do not remove instrument covers when operating.
• Ensure that the instrument is switched off throughout the
cleaning procedures.
• Use of controls or adjustments or performance of procedures
other than those specified may result in hazardous radiation
exposure.
• Make sure that you disable all sources when you are cleaning
any optical interfaces.
• Under no circumstances look into the end of an optical device
attached to optical outputs when the device is operational. The
laser radiation is not visible to the human eye, but it can seriously
damage your eyesight.
• To prevent electrical shock, disconnect the instrument from the
mains before cleaning. Use a dry cloth, or one slightly dampened
with water, to clean the external case parts. Do not attempt to
clean internally.
• Do not install parts or perform any unauthorized modification to
optical devices.
• Refer servicing only to qualified and authorized personnel.
E.2 Why is it important to clean optical devices ?
In transmission links optical fiber cores are about 9 µm (0.00035")
in diameter. Dust and other particles, however, can range from
tenths to hundredths of microns in diameter. Their comparative size
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