KEYENCE LS-7000 - Manual (Page 5)

Note: ■ Influence of Ambient Operating Temperature
Ensure that the ambient operating temperature is constant. A
change in the ambient operating temperature may result in
measurement errors. If the ambient operating temperature
changes by 10
°C, it will take approximately 60 minutes for the
interior temperature distribution of the LS-7000 Series to be
uniform.
■ Warming Up
Do not operate the LS-7000 Series for approximately 30 minutes
after it is turned on. The internal circuitry of the LS-7000 Series is
not stable immediately after it is turned on. The measured value
drifts gradually as a result.
■ Influence of Dust and Dirt
A measurement error may result due to dirt, dust, water, or oil in
any of the following cases.
• Cover glass: Blow off the dirt, dust, water or oil on the cover
glass with clean air. If the cover glass is excessively dirty, wipe
the glass with a soft cloth moistened with isopropyl alcohol.
• Target surface: Blow off the dirt, dust, water or oil on the sur-
face with clean air or wipe the surface.
• Intrusion of dirt, dust, water or oil blown or sprayed into optical
sensing area: Install a protection cover or perform air purging.
■ Influence of Vibration
The measured value of an object may fluctuate if the object is
vibrating. If that happens, increase the averaging number. This
will ensure highly accurate measurement.
■ Targets
The measured value of an object may have an error due to the
shape and surface condition. Locate a reference object within the
measuring area and use the calibration function of the LS-7000
Series to correct the error if that happens.
■ Influence of Air Flow
The measured value of an object may fluctuate due to a slow
flow of air. In that case, the following countermeasures are
effective.
• Protect the measuring head with a cover.
• Use a fan to mix the air vigorously between the transmitter and
receiver.
■ Maintenance
Do not wipe the LS-7000 Series with a damp cloth or a cloth
moistened with benzine or paint thinner. This may cause the
discoloration or deformation of the LS-7000 Series. If the LS-
7000 Series is excessively dirty, use a tightly squeezed cloth
moistened with thin neutral detergent. Then wipe the LS-7000
Series with a soft dry cloth.
■ Precautions for LED
The LS-7010/LS-7030/LS-7070 Measuring Head uses an LED light source. Abide by the
following precautions when using the unit.
• Do not look at the LED light source for a long time.
The LED used as the light source is classified into class 1
according to IEC60825-1 standards. Basically the light beam of
the LED is safe, but do not look at the LED for a long time.
• Do not disassemble the unit.
The unit does not incorporate a mechanism to stop the emission
of the LED when the unit is disassembled. Never attempt to
disassemble the unit, otherwise you will be exposed to LED light.
CAUTION
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