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Raman Rxn4
10
Maintenance
10.1
Optimization
If you move the Raman Rxn4, it may be necessary to re-optimize its performance. First, re-verify its performance
using Raman RunTime and compare the results for the current to the previous verification. If the signal intensity has
dropped significantly, you may benefit from following the optimization guidelines below.
10.1.1 Sample position
If the sample has been moved from the focal point of the probe, less Raman scattering is recovered by the probe and
transmitted to the spectrograph. This is the easiest area to check first.
Perform the following procedure in a darkened room:
1. Click Focus on the Stream Detail View.
2. Watch the signal increases and decreases in response to the sample movement in front of the probe.
3. Be aware of any potential laser light reflected off the sample container during this procedure.
WARNING
The Raman Rxn4 uses a Class 3B laser as defined in
output beam from the laser will cause severe damage and possible blindness. Always be aware of the initial
direction and possible reflection or scattering paths of the laser.
Refer to the Raman Rxn4 Safety Instructions and the probe-specific safety instructions for additional laser safety
information.
10.1.2 Cleaning the lens or window
If the lens or window on the probe/optic is contaminated by the process, dust, or fingerprints, it needs to be cleaned.
Refer to the applicable probe or optics manual for cleaning instructions.
10.1.3 Detector camera alignment
If the Raman Rxn4 spectrograph internal optics have shifted, the detector camera alignment may need to be changed.
CAUTION
The CCD camera alignment is set at the factory and rarely needs to be altered in the field. Alignment should be
performed only by experienced personnel.
Prior to performing a camera alignment operation, it is important to ensure that no stray light is entering any of the
probes that are attached to the Raman Rxn4. Alignment is performed with an internal white light source, and stray
light entering on any of the attached probes can interfere with the alignment light source.
To perform the camera alignment:
1. Navigate to Options > Calibration.
2. Click Calibrate under the Internal Calibration section then select Recalibrate All from the Calibration Mode
drop-down list. Click Calibrate.
All probe calibrations and verifications are invalidated after Recalibrate All and need to be re-performed. See
Calibration and verification →
Endress+Hauser
ANSI Z136.1: Safe Use of
for additional instructions.
Operating Instructions
Lasers. Direct eye contact with the
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