Care And Maintenance - Levenhuk Ra 150N Dob Guia Del Usuario

Batteries safety instructions
• Always purchase the correct size and grade of battery most suitable for the intended use.
• Always replace the whole set of batteries at one time; taking care not to mix old and new ones, or batteries of different
types.
• Clean the battery contacts and also those of the device prior to battery installation.
• Make sure the batteries are installed correctly with regard to polarity (+ and
• Remove batteries from equipment that is not to be used for an extended period of time.
• Remove used batteries promptly.
• Never attempt to recharge primary batteries as this may cause leakage, fire, or explosion.
• Never short-circuit batteries as this may lead to high temperatures, leakage, or explosion.
• Never heat batteries in order to revive them.
• Remember to switch off devices after use.
• Keep batteries out of the reach of children, to avoid risk of ingestion, suffocation, or poisoning.
• Utilize used batteries as prescribed by your country laws.

Care and maintenance

• Never, under any circumstances, look directly at the Sun through this device without a special filter, or look at another
bright source of light or at a laser, as it may cause PERMANENT RETINAL DAMAGE and may lead to BLINDNESS.
• Stop using the device if the lens fogs up. Do not wipe the lens! Remove moisture with a hair dryer or point the telescope
downward until the moisture naturally evaporates.
• Do not touch the optical surfaces with your fingers. Clean the lens surface with compressed air or a soft lens cleaning wipe.
To clean the device exterior, use only the special cleaning wipes and special tools that are recommended for cleaning the
optics.
• Replace the dust cap over the front end of the telescope whenever it is not in use. Always put eyepieces in protective cases
and cover them with caps. This prevents dust or dirt from settling on the mirror or lens surfaces.
• Lubricate the mechanical components with metal and plastic connecting parts. Components to be lubricated:
• Optical tube;
• Fine mechanics (focuser rail, telescope optical tube microfocuser);
• Mounting;
• Worm-and-worm pairs, bearings, cogs, threaded mounting gears.
Use all-purpose silicon-based greases with an operating temperature range of
• After unpacking your microscope and before using it for the first time check for integrity and durability of every component
and connection.
• Protect the device from sudden impact and excessive mechanical force. Do not apply excessive pressure when adjusting
focus. Do not overtighten the locking screws.
• Abrasive particles, such as sand, should not be wiped off lenses, but instead blown off or brushed away with a soft brush.
• Do not use the device for lengthy periods of time, or leave it unattended in direct sunlight. Keep the device away from water
and high humidity.
• Be careful during your observations, always replace the dust cover after you are finished with observations to protect the
device from dust and stains.
• If you are not using your microscope for extended periods of time, store the objective lenses and eyepieces separately from
the microscope.
• Do not try to disassemble the device on your own for any reason. For repairs and cleaning of any kind, please contact your
local specialized service center.
• Store the device in a dry, cool place away from hazardous acids and other chemicals, away from heaters, open fire, and other
sources of high temperatures.
• If a part of the device or battery is swallowed, seek medical attention immediately.
• Children should use the device under adult supervision only.
Levenhuk International Lifetime Warranty
All Levenhuk telescopes, microscopes, binoculars and other optical products, except for accessories, carry a lifetime warranty
against defects in materials and workmanship. Lifetime warranty is a guarantee on the lifetime of the product on the market.
All Levenhuk accessories are warranted to be free of defects in materials and workmanship for six months from date of retail
purchase. The warranty entitles you to free repair or replacement of the Levenhuk product in any country where a Levenhuk office
is located if all warranty conditions are met.
For further details please visit our web site: www.levenhuk.com/warranty
If warranty problems arise, or if you need assistance in using your product, contact the local Levenhuk branch.
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60 ... +180°С (
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76 ... +356°F).
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