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6. TROUBLESHOOTING
If you encounter any issues either during installation or during use of the IRmadillo please
contact Keit (
).
Below are some examples of issues that may be experienced with potential solutions to the
problem.
Table 10
– Troubleshooting guide
Issue
Cause
Potential Solution
Modbus communications
appear unresponsive
despite the spectrometer
running normally
Some third-party Modbus
clients can crash the USB
subsystem on the client PC,
causing a loss of connection
Restart the USB COM port
on the remote computer.
The Modbus client should
be designed to recover from
a null response and have a
finite timeout period.
Insensitive to analyte
changes
ATR element not in sample
Ensure ATR element is
properly immersed in
sample to be analysed
Noise in spectra that
doesn’t disappear with
longer sampling times
Background scan taken with
insufficient averaging
Experiment with increased
background scan acquisition
time
Negative peaks in
spectrum
Background scan taken with
a dirty probe
Clean ATR element and
take a new background
scan.
Signal too noisy
Insufficient averaging
Experiment with increased
averaging
Low / No signal
Instrument warming up
Allow the instrument to
warm up for several minutes
before checking raw
spectrum. Recommended to
allow 12 hr to fully warm up
before use.
Switch on from a very low or
a high temperature
Allow to warm up for 12 hr
before checking raw
spectrum. It will take time to
stabilise the internal
temperature and you must
wait for this to occur.
Thermal shutdown activated
operation outside of
specification.
Contact Keit for advice on
resetting the instrument
Appearance of
unexplained features
(characteristically seen at
1600
– 1700 cm
-1
)
Water vapour present in
instrument
Check that your purge gas
specification is suitable and
that your gas supply is free
flowing with no blockages
