Ocean Optics DTS - Manual (Page 54)

Chapter 7
7-2 Polychromix DTS TM Near-Infrared Spectrometer
Operator’s Manual
Document Number 04-91-0201-00 Rev A
7.3 Troubleshooting
7.3.1 Introduction
Since the Polychromix DTS spectrometer is employed in a system that
includes a source and a sample holder or integrating sphere, all
troubleshooting activities should include all components of the system.
Troubleshooting can be simplified by a consideration of the following
guidelines:
•
In almost all cases, there is a single cause for the problem. As an
example, a noisy spectrum can be due to:
a) The lamp is weak
b) The fiber optic cable does not make good contact with the
spectrometer or the sample holder (integrating sphere).
c) An internal defect in the spectrometer
•
A fundamental knowledge of the role of each component of the system is
extremely useful in diagnosing the problem.
•
The availability of spare parts to substitute into the system is extremely
useful.
•
If any aspect of the analytical conditions is to be changed, run a “before
and after” test to verify that the effect of the change is well understood.
Do not consider any change as trivial. As an example, if you change the
supplier of a solvent, verify that the change has no effect on the analysis.
•
Run a standard (or a series of standards) on a periodic basis to verify that
the system is performing properly. When abnormal data is obtained,
collect the spectrum of a standard and compare the spectrum to one that
was previously obtained.
•
If an error message is presented, press the Continue button indicated on
the Error Message dialog box. If this does not remedy the problem, turn
off the spectrometer, disconnect the USB cable and then reinstall the
cable.