Rosemount 890, Инструкция по эксплуатации

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R
OUTINE
S
ERVICE
748460-A
6-9
Rosemount Analytical
January 2000
6.3 CLEANING OPTICAL COMPONENTS
The Model 890 contains several types of optical and glass surfaces. Those should
never be touched, even when the components requires cleaning. When handling
these components, always wear powder-free latex gloves or finger cots, and hold them
only by the edges.
NEVER BREATH ON THE SURFACE AS A METHOD OF
CLEANING.
To ensure an optical component is actually clean, hold the surface to reflect light. If
the surface appears clean, it probably is.
After an optical component has been cleaned, immediately install it into its holder to
avoid damage or contamination. If an optic must be stored, do so in clean optical
cleaning paper.
6.3.1 S
PECTRALLY
S
ELECTIVE
M
IRRORS
Each of these mirrors has a small dot on the un-coated side. Do not remove this dot.
To clean, carefully wet the entire mirror with cleaning fluid, rinse with deionized water
while still wet, and blow dry with clean, dry nitrogen or dry, oil-free air.
If after repeated attempts, the mirror still appears contaminated, wet the mirror with
cleaning fluid, and gently rub with a clean wet optical cleaning tissue. Rinse and blow
dry. Repeat if necessary.
6.3.2 B
EAM
S
PLITTER
/F
OCUSING
M
IRRORS
The procedure for cleaning the beam splitter and focusing mirrors is the same as
Section 6.3.1 except:
Under no circumstances should the surfaces be rubbed.
These surfaces are very fragile and easily damaged by mechanical cleaning,
degrading the performance of the component. Cleaning must be accomplished
chemically.
6.3.3 S
OURCE
E
NVELOPE
The source envelope may be cleaned with cleaning fluid and rinsed with deionized
water, and may be rubbed with optical cleaning tissue if necessary. After cleaning,
rinse the lamp with alcohol and deionized water, and blow dry with nitrogen or dry, oil-
free air.
6.3.4 E
ND
C
APS
Clean the sample cell end caps in the same manner as the spectrally selective mirrors
(Section 6.3.1). After cleaning, heat the end caps (with a heat source such as a heat
gun) to ensure that no moisture remains trapped after re-assembly.