22
Problem
Cause
Action
Cannot measure.
The power is not applied.
Confirm the wirings and connections.
The power voltage is low.
Confirm the power voltage and adjust it to
the 12 to 24 VDC range.
The
measurement
value is incorrect.
The lens is dirty.
Clean the lens referring to the Lens section
under “Maintenance”.
The measurement area is off center.
Adjust the mounting position so that the
target comes to the center of the area.
A high-temperature object is near the
target affecting the measurement.
Block the heat source using a board, etc.
The emissivity rate is incorrect.
Set the emissivity rate to that of the target.
The measurement
value is not
stable.
The sensor head is affected by
vibration.
Prevent vibration.
The sensor head is affected by rapid
temperature change.
Leave the sensor head for a while until the
temperature becomes stable.
Troubleshooting
Maintenance
Lens
Dust, dirt and scratches on the lens can cause incorrect measurement. If the lens is dirty,
remove the dust using a blower for cleaning lens. For stubborn dirt, apply a small amount
of ethyl alcohol to a cotton swab or special lens cleaning cloth and gently wipe off the dirt.
Amplifier
For heavy dirt on the amplifier, use a lightly moistened cloth to wipe it off. Do not use
alcohol or such other material because it may damage the surface or fade the printing.
Calibration Yearly calibration is recommended. The sensor head and amplifier cannot be separately
calibrated. Always calibrate them together. For details, contact the sales distributor.
* If the problem persists even after taking the actions above or the problem is not listed here, contact
the sales distributor.
You can rinse the sensor head with water because it is water-resistant. However, water drops remaining
on the lens will cause incorrect measurement. Be sure to wipe them off with a soft cloth or blow them off
with air.
You can easily remove water or oil by using air as the water/oil-repellent coat is applied on the surface
of lens.
If the unit may be exposed to splash of water or oil or located in a dusty place during measurement, use
the optional air purge collar.