LumaSense Technologies IS 6 Advanced - Manual (Page 41)

IS 6 Advanced / IGA 6 Advanced Manual Troubleshooting · 41
9 Troubleshooting
Symptom Probable Cause Comments
No analog output
even if the display
shows a temperature
above lower range
limit
Reversed leads to IS 6 Advanced /
IGA 6 Advanced The IS 6 Advanced /
IGA 6 Advanced is diode
protected if power leads are
reversed.
See section
3.1
Reversed leads to other instruments
in the current loop
Open circuit in lines connecting all
instruments in current loop
Total burden higher than 500 Ohms
Insufficient supply voltage (See wiring
diagram)
Temperature reading
differs between built-
in display and external
instrumentation
Pyrometer output setting differs from
external instrument’s input setting
Check the 0 to 20 mA or
4 to 20 mA on both sides
Check the sub range setting
on pyrometer against the
range setting on the external
instrument
Temperature readings
are too low Target size too small
Target is not at correct focus distance See section 3.2
With small target/close focus
models, aiming may require X-
Y positioning table for fine
adjustment during aiming
Incorrect alignment of the pyrometer
to the object Realign pyrometer to achieve
the maximum temperature
signal
Dirty window or lens See Section 6.1
Target temperature too low.
Incorrect slope adjustments
Faulty IS 6 Advanced /
IGA 6 Advanced
Contact LumaSense. See
section
1.5
Temperature readings
are too high Targets hotter than expected. (This
often happens with first time infrared
Pyrometer users) Verify target temperature
with contact type method.
(Thermocouples may not
accurately determine surface
temperature due to “heat
sink” effect)
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. IS 6 Advanced /
IGA 6 Advanced may be “seeing”
through target See Technicial Specifications
Consult LumaSense for
analysis.