Safety Precautions - Keysight N7744A User Manual

6
Maintenance and Troubleshooting
Cleaning Instructions for this Instrument

Safety Precautions

Why is it important to clean optical devices?
86
The Cleaning Instructions apply to a number of different types of
Optical Equipment. Most relevant for this instrument is the section
"How to clean connector adapters" on page 95
adapters, and "How to clean optical glass plates" on page 96
cleaning the front of the instrument.
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.
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 means that
they can cover a part of the end of a fiber core, and as a result will reduce
the performance of your system.
for cleaning the quad-
for
Keysight N774x Series