How to use HSV-110D Otdr for fiber optic fault location?
The HSV-110D OTDR is a 3-in-1 portable OTDR, which integrates OTDR, OPM and VFL functions, enabling fast and accurate fiber fault location for FTTH, data centers and field maintenance.
1. Preparations
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Disconnect all active devices (OLT, ONU, switch) at both ends of the fiber to avoid instrument damage.
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Clean the fiber connector end face with alcohol wipe (no dust or oil).
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Ensure the HSV-110D is fully charged, install the correct connector adapter, and wear laser protection (do not look directly at the optical port).
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Connect: OTDR test port → adapter jumper → flange → the starting end of the fiber to be tested.
2. Parameter Settings (FTTH Optimal)
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Wavelength: 1310nm (short distance/joint) or 1550nm (long distance/microbend fault).
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Test Range: 1.5 times the total length of the fiber (0–20km for FTTH).
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Pulse Width: 30ns (near-end fault) or 300ns (long-distance).
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Average Times: 512–1024 (for smooth curve).
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Refractive Index: 1.4680 (default for single-mode G652.D fiber).
3. Fault Location Steps
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Power on and switch to OTDR Mode.
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Confirm parameters and click Start Test.
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The instrument automatically generates a backscattering curve.
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Move the cursor to the abnormal point to get the exact distance, loss and reflection value.
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Save the curve and export the fault report.
4. Quick Verification (On-Site)
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VFL Mode: Switch to VFL, the red light (650nm) will leak at the fault point for quick physical location.
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OPM Mode: Measure the optical power at both ends to verify link connectivity and loss.
5. Notes
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Do not look directly at the optical port to avoid laser damage to eyes.
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Re-test after fiber repair to ensure the loss is qualified.
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Keep the instrument away from moisture and high temperature.