Optex PT-7LD, Instruction Manual

Page: 56 / 56

Maintenance method
[Lens]
Dust or dirt adhering to the lens and flaws on the lens may cause incorrect measurement. When
the lens is dirty, remove the adhering objects from the lens using a blower for lens cleaning, etc.
If dirt remains, wipe the lens softly using a cotton swab or lens wiping cloth moistened with a
small amount of ethyl alcohol.
Battery
[Battery replacement]
When the BATT. symbol as a battery indicator and “-b-” on the display have started to blink, it is
time to replace the batteries.
Note)When replacing the batteries, be sure to install new batteries without mixing an old one.
(1) Seize it lightly face and back of the battery cover by hand, and pull it out.
*A battery cover is the structure which doesn’t come off easily to prevent
falling.
(2) Install new batteries in the correct direction.
*The attached batteries are to be used for checking operations. The battery life mentioned in
Specifications is not assured for these batteries.
Precautions when handling batteries
Do not throw exhausted batteries in the fire, nor charge them.
Do not dispose of exhausted batteries together with general waste.
Take them to an appliance dealer or dispose of them when permitted.
Remove batteries when the thermometer is not used for a long term.
22
Maintenance / Battery
[Body]
Wipe it with a soft cloth.
When the body is extremely dirty, wipe it with a cloth moistened with diluted detergent after
wrung sufficiently.
Note) Do not use hot water exceeding 50°C and chemical agents such as thinner and
benzene, which may cause fading of characters, deformation, or damage.
[Periodical inspection]
It is advisable to perform an annual calibration inspection. For further information, please
contact OPTEX FA.