Endress+Hauser Raman Rxn2 - Page 19

Raman Rxn2 Operating Instructions
Endress+Hauser 19
CAUTION
 Unused probes that are attached to the Raman Rxn2 analyzer should ALWAYS be capped to prevent stray
ambient light from entering the probe. Stray ambient light, whether from an uncapped probe or through
incomplete light shielding of the sample, may produce undesirable spectral interferences and result in calibration
failure or inaccuracy.
WARNING
 Probes attached to the Raman Rxn2 analyzer should always be capped or pointed away from people toward a
diffuse target if not installed in a sample chamber.
6. For each EO fiber cable, restrain the probe EO fiber-optic cable using the strain relief located at the rear of the
instrument.
CAUTION
 When installing the probe in situ, the user must provide strain relief to the EO fiber-optic cable at the probe
installation location.
5.2.3.2 For hybrid configurations
The ALT channel utilizes an EO cable with an integrated electrical laser interlock loop, and the process of connecting
the ALT channel is described in the previous section. The Rxn-20 channel of the Raman Rxn2 hybrid configuration
has four connections points: fiber electrical interlock, excitation, collection, and calibration. The excitation and
calibration connections utilize FC style fiber connectors, while the collection connection utilizes a mechanical transfer
(MT) style fiber connector. A remote interlock connector is also provided for the Rxn-20 channel and is located
adjacent to the fiber electrical interlock connection. The Rxn-20 excitation, collection, and calibration fibers are
fragile, and care must be taken to properly route and restrain the fibers using the following procedures.
To connect a probe to the Rxn-20 channel:
1. Remove the Rxn Rxn-20 plastic cover by unscrewing the two socket head cap screws using the 7/64" ball driver
included with the instrument. This will reveal the individual connectors for the Rxn-20 channel.
Figure 8. Rxn-20 channel cover on rear of Raman Rxn2 hybrid configuration (left) and connectors for Rxn-20 channel (right)
2. On the cable-side connectors, clean ONLY the excitation and calibration fiber tips prior to installation if
cleanliness of these fiber tips is unknown.
o First use a lens wipe very lightly saturated with a solvent, such as reagent grade acetone or 100 % IPA
followed by a final clean with a 2.5 mm fiber cleaning tool. Do not use the same wipe for both fiber tips.
o Swipe the fiber tip once with the damp portion of the wipe, then swipe once more with a dry portion of the
same wipe. Repeat for both fiber tips.
3. Employ the two strain reliefs on the rear of Raman Rxn2 hybrid configuration (using the 7/64" ball driver) to
secure the fiber cable assembly.
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