Keysight Technologies N4373D, User Manual

Page: 121 / 176

Maintenance
Keysight
N4373D Lightwave Component Analyzer, User’s Guide 119
Procedure for stubborn dirt
Use this procedure when there is
greasy dirt on the lens.
1 Moisten a new cotton swab with isopropyl alcohol.
2 Clean the lens by rubbing the cotton swab over the surface
using a small circular movement.
3 Using a new, dry cotton swab remove the alcohol, any
dissolved sediment and dust.
4 Blow away any remaining lint with compressed air.
How to clean instruments with a fixed connector interface
You should only clean instruments with a fixed connector
interface when it is absolutely necessary. This is because it is
difficult to remove any used alcohol or filaments from the input
of the optical block.
It is important, therefore, to keep dust caps on the equipment at
all times, except when your optical device is in use.
If you do discover filaments or particles, the only way to clean a
fixed connector interface and the input of the optical block is to
use compressed air.
If there are fluids or oil in the connector, please refer the
instrument to the skilled personnel of the
Keysight
service team.
How to clean instruments with a physical contact interface
Remove any connector interfaces from the optical output of the
instrument before you begin the cleaning procedure.
Only use clean, dry compressed air. Make sure that the air is free
of dust, water, and oil. If the air that you use is not clean and dry,
this can lead to filmy deposits or scratches on the surface of your
connector interface. This will degrade the performance of your
transmission system.
Never try to open the instrument and clean the optical block by
yourself, because it is easy to scratch optical components, and
cause them to become misaligned.
C A U T I O N