Optex PT-7LD, Instruction Manual

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Maintenance
[Filter]
Dust, stain or scratch on a filter causes incorrect measurement. If the filter is stained, clean the filter
with a lens-cleaning blower or wash it with clean water.
If the filter is still stained, gently wipe the stain off with a cotton swab or lens cleaning cloth, which may
be moistened with ethyl alcohol.
Note. If any water drop is on the filter and/or the area around it, the thermometer measures temperature
of the water drop, which results in incorrect measurement. Wipe up the filter and the area around
it completely before taking measurement.
[Main Unit]
This thermometer has waterproofing; therefore, it can be washed with clean water.
If the thermometer is stained considerably, wash it with a little neutral detergent diluted with clean
water. After cleaning the thermometer by washing, wipe it completely before use.
Note. Do not use hot water over 50˚C or chemicals such as thinner and benzene for cleaning as it may
deform or damage the thermometer.
[Annual Inspection]
Re-calibration is recommended once a year. Ask the distributor where you purchased the unit for
details.
Battery
[Installing Battery]
When the battery level indicator shows little electricity left and/or "-b-" sign
on the display blinks, replace the battery with a new alkaline one.
Note. Upon replacing the battery, keep the battery compartment out of
the water. Wipe the main unit completely.
Turn the lock for battery cover at the back of main unit counterclockwise
to open the battery compartment.
Much the" " " " polarities of the battery with the signs on the battery
compartment.
Close the battery cover and turn the lock clockwise to fix it.
Note. If the compartment cover is not locked properly, water penetrates the
inside and the waterproofing does not work. Be sure to lock it com-
pletely.
Maintenance / Battery
Cautions on batte ry
Do not throw used batteries into a fire nor recharge it
Do not dispose any used battery together with garbage. Follow local laws or regulations
when disposing batteries.
Remove the battery for a long-time storage.
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