2.9. Service-related warning
Damage Requiring Service
Do not attempt to service this instrument yourself as opening or removing covers may expose you to dangerous
voltage or other hazards. Unplug this instrument from the power source and after servicing to qualified service
personal under the following conditions
- When the AC power cord or plug is damaged.
- When the LCD is damaged.
- If liquid has been spilled, or objects have fallen into the instrument.
- If the instrument does not operate normally by following the operating instructions. Adjust only those controls that
are covered by the operating instructions as an improper adjustment of other controls may result in damage and
will open require extensive work by a qualified technician to restore the instrument to instrument to its normal
operation.
Unplug the power cord from the power source before opening the cover, and then remove the probe. Even if the
instrument is disconnected from all the power sources, special attention is required in service as the inside capacity
might be in charged condition. When replacement of fuses or other parts is required, be sure the service technician
has used replacements parts specified by the manufacturer or have the same characteristics as the original part.
Unauthorized substitutions may result in fire, electric shock or other hazards.
There is a risk of electric shock. No user serviceable
parts inside. Leave repair to qualified personnel.
Safety Check
Upon completion of any service or repairs to this instrument, ask the service technician to perform safety checks to
determine that the instrument is proper operating condition.
2.10. Cleaning and Maintenance
Maintenance routines performable by the operator are listed in this section. More advanced routines (i.e., Procedures
involving repairs or adjustments within the instrument) should be referred to service personnel.
Cleaning
If the outside of the case becomes dirty or stained, carefully wipe the surface with a cloth moistened with detergent,
then wipe the cleaned surface with a dry cloth. In case of severe stain, try cleaning with a cloth moistened with alcohol.
Do not use powerful hydrocarbons such as benzene or paint thinner. Dust and/or smudges can be removed from the
LCD screen. First remove the front case and filter. Clean the filter (and the LCD face, if necessary) by wiping carefully
with a soft cloth or commercial wiping tissue moistened with a mild cleaning agent. Take care not to scratch them. Do
not use abrasive cleanser or strong solvents. Let the cleaned parts dry thoroughly before reinstalling the filter and front
case. If it is installed wet, dew may form and blur the waveforms. Be particularly careful not to get fingerprints on the
filter or LCD face.
Maintenance
This instrument should never be placed in a built-in installation such as a bookcase or rack unless proper ventilation is
provided. Ideal ambient temperature and relative humidity for storing the instrument are 23°C and 60% RH.
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