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Application Note 4 Reliable Operation of LSProbe 1.2 Field Probes

Figure 9: Rear view of Computer Interface with short fiber-optic cable fixed to its housing

6 Fiber Handling Recommendations

Observing the handling recommendations stated below will ensure the continuous, reliable
operation of the LSProbe 1.2 Field Probe System. The recommendations should be brought
to the attention of all staff operating the system. In general, always handle fiber-optic sys-
tems with care.

• Avoid bending of fiber optic cables more than the criticial radius. For the fiber-optic

cables supplied with the LSProbe 1.2 Field Probe, the critical bending radius can be
given with 60 mm for short term and 100 mm long term bending.

• Avoid tensile strain on fiber-optic cables. Fiber-optic cables shall not carry the weight

of the connectors.

• Always use two sacrificial cable kits – one between Computer Interface and extension

cable and one between extension cable and Field Probe.

• Always disconnect the optical fiber connection using the E2000 connectors of the

sacrificial cable kits.

• Do not open any FC/ST fiber connectors unless absolutely necessary.
• Cover all open fiber-optic connectors using the supplied dust caps.
• Before connecting any FC/ST connectors, e.g., when replacing a sacrificial cable kit,

clean all connectors as described in Section 4. Use a fiber microscope to ensure that
the connector end-faces are immaculate.

• When a sacrificial cable kit has burned-in at the E2000 coupler, replace the complete

sacrificial cable kit including the E2000 coupler and clean all FC/ST connectors as
described in Section 4.

November 23, 2020

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Summary of Contents for LSProbe 1.2

Page 1: ... Probes LUMILOOP GmbH support lumiloop de November 23 2020 Contents 1 Introduction 2 2 Fiber Failure Mechanism 3 3 Sacrificial Cable Kits for LSProbe 1 2 Field Probe Systems 4 4 Fiber Connector Cleaning Instructions 6 5 Replacing Sacrificial Cables 8 6 Fiber Handling Recommendations 9 ...

Page 2: ...ectors of Field Probe Computer Interface and extension cable They provide two defined and convenient points for disconnecting the Field Probe from the Computer Interface using the E2000 con nectors of the sacrificial cable kits Due to the integrated shutters burn in defects at the E2000 connectors are significantly less frequent However in the case of a burn in defect at an E2000 connector the sacrifi...

Page 3: ...C fiber connector pair which carries the optical power for the field probe suffered a burn in defect a Field Probe FC before after cleaning b Field Probe ST before after cleaning c Extension cable FC before after cleaning d Extension cable ST before after cleaning Figure 2 Example for contaminated FC power and ST data fiber connectors As suggested by the name burn in defects are caused by excessive he...

Page 4: ...tors are significantly less prone to contamination and thus to burn in defects because of their integrated automatic shutters Consequently E2000 connectors may be plugged without cleaning consciously accepting that contamination will accumulate with each plugging cycle and lead to a burn in defect eventually Once a burn in defect has occurred the complete sacrificial cable kit must be replaced in cl...

Page 5: ...al link should always be disconnected using E2000 connec tors Do not disconnect any FC ST connectors unless absolutely necessary When plugging FC ST connectors make sure to observe the cleaning instructions in Section 4 FC ST Coupler Field Probe Use E2000 Connectors Two Sacrificial Cable Kits incl E2000 Connectors and Coupler E2000 Fiber Coupler FC ST Fiber Coupler FC ST Fiber Coupler E2000 Fiber ...

Page 6: ...n inad vertently during fiber inspection Note that the focal plane for for E2000 and ST FC connectors differ and must thus be adjusted 2 Clean the connector end face 3 Reinspect the connector end face go back to step two if there is any contamination 4 Connect the fiber connectors do not put the connector down Do not apply dust caps between cleaning and connecting LUMILOOP s cleaning kit shown in Fig...

Page 7: ...rm Step 3 Moisten one corner of the cleaning wipe us ing the fiber optic cleaning pen or IPA pipette Step 4 Press the fiber end face flatly against the moist area of the wipe and slide it into the dry area of the wipe Step 5 Only for E2000 connectors remove the E2000 locking cap re clip the connector pair after cleaning both connectors Figure 8 FC ST E2000 fiber optic connector wet to dry cleaning met...

Page 8: ...or and connect it to the coupler d Repeat steps a through c for the ST connectors 4 Repeat step three for the second end of the sacrificial cable kit 5 Consider ordering a new spare sacrificial cable kit Fixing burned in FC ST connectors In case of a burn in defect at a ST or FC connector due to improper handling replacement is required There are three destinct cases In case of a burn in defect at a...

Page 9: ...g Avoid tensile strain on fiber optic cables Fiber optic cables shall not carry the weight of the connectors Always use two sacrificial cable kits one between Computer Interface and extension cable and one between extension cable and Field Probe Always disconnect the optical fiber connection using the E2000 connectors of the sacrificial cable kits Do not open any FC ST fiber connectors unless absolutel...

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