ISR 320 Manual
Troubleshooting
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36
Symptom
Probable Cause
Comments
Temperature readings are too
high
Incorrect slope adjustments
See sections 4.2, 5
The measurement is influenced by reflections
of hot machine parts
Use mechanical
accessories to avoid the
influence of the
interfering radiation.
If target emissivity is less than 1, reflections
from nearby hot objects will influence readings
Block reflection paths to
see if readings drop to
expected temperature.
Incorrect spectral response for application.
ISR 320 may be “seeing” through target
See Technicial
Specifications
Consult LumaSense for
analysis.
Electrical noise in lead wires caused by intense
magnetic fields and/or improper selection of
interconnecting cable and/or cable run in
same conduit as AC power lines
See section 3.1
Lens or window clouding up
Increase or decrease air
purge rate and/or
investigate other cause.
Target leaving field of view or ISR 320 mount
slipping
Faulty ISR 320
Contact LumaSense. See
section 1.5
Improper grounding of cable shield and/or
ISR 320 housing (or cooling jacket)
ISR 320 mounting not secure
Noisy readings (fast
fluctuations)
Target moves more than 95% out of field of
view. Conveyor type applications will also
cause fluctuations as targets move by the field
of view
Application may require
Maximum to be stored.
Apply t
clear
settings. See
section 4.5.
Target may be changing temperature quickly.
(Thermocouples do not respond as fast as the
ISR 320)
Speed of response may
be slowed down Apply t
90
settings. See section 4.4
Noisy readings (fast
fluctuations)
Target may be reflecting nearby objects that
have fluctuating temperatures
Loose connection in wiring
Electrical noise lead wires caused by intense
magnetic fields, improper selection of inter-
connecting cable
Noisy readings (fast
fluctuations)
Cable run into in same conduit as AC power
lines
