Справочник Пользователя для Hitachi Microscope & Magnifier S-3400N
4.1 Maintenance of Electron Optical Column
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4.1.6 Ultrasonic Cleaning with Organic Solvent
CAUTION: When handling organic solvent (volatile solvent), take the following points into
consideration to avoid the danger of injury or explosion caused by ignition.
1. Volatile solvent should be handled at a place which is well ventilated and is
1. Volatile solvent should be handled at a place which is well ventilated and is
well away from flame.
2. If volatile solvent is excessively inhaled, dyspnea (difficulty in breathing) may
be caused. If volatile solvent is swallowed or gets onto the skin or into the
eyes, the symptoms of polyneuritis including anesthesia and ataxia (difficulty
in walking) may develop. So use a gas mask for organic gas, plus an
inhaler, safety goggles, protective gloves, protective boots, etc. as the
occasion demands or in consideration of conditions.
eyes, the symptoms of polyneuritis including anesthesia and ataxia (difficulty
in walking) may develop. So use a gas mask for organic gas, plus an
inhaler, safety goggles, protective gloves, protective boots, etc. as the
occasion demands or in consideration of conditions.
For cleaning of the Wehnelt cylinder and anode plate, the furnished polishing paste is used and
organic solvent is used to remove polishing past.
Conduct the work safely with reference to the warnings given at the beginning of this manual.
(1)
Supply water into the wash-basin of the ultrasonic cleaner up to 10 to 20% of its capacity.
(2)
Fill organic solvent into a beaker to about half of its capacity.
(3)
Put parts, which have been cleaned with polishing paste, into the beaker.
(4)
Place the beaker in the wash-basin of the ultrasonic cleaner.
(5)
Turn on the cleaner and clean the parts for 2 to 3 minutes.
(6)
After the cleaning, take the parts out of the beaker and rinse them in distilled water for 2 to
3 minutes to remove organic solvent.
3 minutes to remove organic solvent.
(7)
Put the rinsed parts into another beaker filled with clean ethyl alcohol.
(8)
After substituting water adhering to parts with alcohol, take the parts out of the beaker with
tweezers and place them on a sheet of clean filter paper to evaporate the alcohol heat to
dry.
tweezers and place them on a sheet of clean filter paper to evaporate the alcohol heat to
dry.
4.1.7 Replacement of Scintillator
When the instrument is used in the low vacuum mode for a long time, the inside of specimen
chamber is likely to be contaminated sooner than in the high vacuum mode.
The scintillator receiving secondary electrons is also apt to be contaminated in the low vacuum
mode. If the surface of scintillator is contaminated, the efficiency of secondary electron
detection may deteriorate to cause an unclear image. So, replace the scintillator before it is
contaminated heavily. It is advisable to replace the scintillator in a cycle of about three years,
though depending on the instrument operating condition in the low vacuum mode.
The replacement work should be conducted by the service engineer.