It has been said, “work not recorded is work not done”. Therefore, such job must have a corresponding job request / report. Preventive maintenance report indicating among other things such as, the nature of work done, parts used, date of repair / PM, and other important and useful information are usually found.
Equipment Record
Records shall be maintained which include the
following:
Name of equipment
Manufacturer’s name, serial number or other unique identification
Date received and placed in service
Condition when received (new, used)
Records of calibration, date of next calibration
Details of maintenance carried out
Current location, where appropriate
Copy of manufacturer’s operating instructions, where available
History of damage, malfunction or repair
Routine Inspection
Ocular check of the physical surface
Checking electrical plugs, sockets, cables, bulbs
Check screws and other mechanical parts
Check optical elements from mechanical damage and dirt
Check illumination by plugging it to electric power source
Performance Check
Run the field stop diaphragm throughout its full range
Move all the blades of iris by its lever control
Run the condenser height adjustment full range; check its centering screw if it moves the condenser smoothly.
Check the mechanical stage if it can move the specimen smoothly and without play throughout its full range. Check by observing at the microscope’s highest magnification.
Parameter: 1 micron stage movement observed at 1000X magnification looks like 1 mm viewed without a microscope and at a distance of 250 mm.
Objectives mounting shoulder, nosepiece must be absolutely clean. If not, centering and focusing are lost.
Rotate nosepiece through 360ยบ and observe all clicking stop positions from either side without any play
Run the fine and coarse adjustment knobs throughout their full range of adjustment.
Make sure that the upper surface of the stand and the corresponding mounting surfaces of the observation tube must be cleaned & free of corrosion.
Adjustment of interpupillary distance of the tube must run smoothly and without exerting undue force.
All optical surfaces must be absolutely cleaned. Pay special attention to: light bulb, cover glass on field stop, condenser front lens, objective front lens, upper surface of eye lens. Inspect and clean accordingly.
