Sharp EL-9900 - Manual (Page 11)

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Caring for Your Calculator
Caring for Your Calculator
• Do not carry the calculator around in your back pocket, as it
may break when you sit down. The display is made of glass and
is particularly fragile.
• Keep the calculator away from extreme heat such as on a car
dashboard or near a heater, and avoid exposing it to exces-
sively humid or dusty environments.
• Since this product is not waterproof, do not use it or store it
where fluids, for example water, can splash onto it. Raindrops,
water spray, juice, coffee, steam, perspiration, etc. will also
cause malfunction.
• Clean with a soft, dry cloth. Do not use solvents.
• Do not use a sharp pointed object or exert too much force when
pressing keys.
• Avoid excessive physical stress.