Optex PT-7LD, Instruction Manual

Page: 15 / 56

If the condition is not improved by the above-mentioned solutions, the thermometer may be out of
order. Please contact the distributor where you purchased the unit.
Troubleshooting
15
Condition Cause Solution
Nothing on display.
The laser will not
activate.
Measured temperature
value seems incorrect.
A displayed temperature
value is unstable.
The battery has run out of
electricity. Otherwise the bat-
tery is not installed correctly
in a battery compartment.
Replace the battery with a new alkaline one.
Otherwise install the battery correctly in the battery
compartment.
A laser aperture is stained. Clean the laser aperture referring "Main Unit" of
"MAINTENANCE" described in page 16.
Voltage for laser is insufficient. Replace the battery with a new alkaline one.
(A sign -b- blinks.)
Otherwise install the battery correctly in the battery
compartment.
A filter unit is stained. Clean the filter referring "Filter" of "MAINTENANCE"
described in page 16.
Field of view is deviated
from the measuring object.
Center the laser beam on the measuring object by referring
"Field of View" described in page 9.
The measuring object is
smaller than the field of
view.
Adjust the measuring range referring to "Field of View" shown
in page 9.
Affected by a nearby
heating source
Block the heating source with a shielding plate or something
like that to avoid interference.
Measuring temperature of
a shiny metal sarface.
The thermometer is affected
by considerable temperature
fluctuation.
Wait until the temperature of thermometer stabilizes.
The displayed temperature could differ from the actual
temperature of which surface is shiny or polished.
Put a piece of optional black tape on the measuring
object, if possible.