LumaSense Technologies ISR 6 Advanced - Manual (Page 45)

ISR 6 Advanced Manual Troubleshooting · 45
9 Troubleshooting
Symptom Probable Cause Comments
No analog output even
if the display shows a
temperature above
lower range limit Reversed leads to ISR 6. The ISR 6 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 sections 3.4, 3.5, and 5.2.11
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 in 1-channel
mode (mono) to achieve the
maximum temperature signal.
Dirty window or lens. See sections 4.9 and 6.1
Target temperature too low.
Target emissivity much lower
than expected.
Even 2-Color instruments
depend on actual target
emissivity to supply sufficient
energy to the sensor.
See sections 4.2, 4.3, 4.4, 4.8,
and 6.1
Incorrect slope adjustments. See sections 6.3 and 5.2.4
Faulty ISR 6 Contact LumaSense. See section
2.5