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5. ROUTINE OPERATIONS AND MINOR MAINTENANCE
Zenith Drive
The middle gear on the zenith drive has a hole to allow a small drop of low temperature rated light
oil to be applied approximately once a year.
The Zenith drive gears can be cleaned with a lint-free cloth at the same time.
Cover Latches
In very moist climates, the internal mechanism of the cover latches can become rusted and
become very difficult to turn.
Applying a few drops of light oil periodically will help to prevent this annoyance.
Levelling Feet
In very moist climates the adjusting mechanism on the Tripod legs can become rusted, making
them impossible to turn.
Applying some grease to the exposed parts periodically will help to prevent this problem.
Micrometers
There may be occasions when one or both micrometers will have to be reset by hand, and the
normal settings are recorded on the Spectrometer Cover.
This problem may occur if the constants for Micrometer Offsets, or the Micrometer Steps /Degree
are not correct, or if the mechanism becomes sticky.
The constants should normally not be changed without further investigation, but the mechanism
may be cleaned with a lint-free cloth.
The micrometers should normally not require lubrication, and the only lubricant KIPP & ZONEN
uses in the Spectrometer is High Temperature Miller Stephenson KRYTOX GPL 200 Grease.
Standard Lamp and Mercury Lamp
The two internal test lamps (Standard Lamp and Mercury Lamp) have an estimated lifetime of
about two years.
The Standard Lamp can be accessed by removing the plate located behind the Zenith Drive Motor.
Once the two screws are removed, the plate can be detached, bringing with it the lamp socket and
the lamp.
Great care must be taken not to touch the new lamp with bare hands as oil and/or moisture may
change the spectral characteristics of the lamp.
The Mercury Lamp may be changed by loosening the two thumbscrews on the lower part of the
Lamp Assembly.
The Lamp and its socket can then be slid forward (toward the PMT), and the new lamp installed.
Great care must be taken not to touch the new lamp.
When replacing the lamp and socket, observe that there is a small aligning pin at the top of the
assembly. The mercury filament is to be installed in vertical position.
55
MKIII OPERATOR'S MANUAL
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