Fiber Instruments Sales ATLAS MINI OTDR, Manual

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ATLAS MINI OTDR User guide
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6. Common faults and troubleshooting methods
Above troubleshooting items are for reference only. During the use of the Atlas Mini OTDR, if
there are any questions, contact Fiber Instrument Sales. Users are strictly prohibited to
dismantle OTDR in effort to repair, by doing so will result in void warranty and additional cost for
repair.
Trouble Description Cause Solution
The OTDR does not start properly Battery dead
Charge the battery and observe the charging
indicator light. If the light is red, continue charging.
Trouble persists, contact FIS.
The OTDR cannot be charged
properly
The environment doesn’t’ meet the charging condition Charge the instrument at -10
℃
(14F)- 50
℃
(131F)
Battery problems, or internal circuit problems Contact the FIS to replace the battery
User can't measure a normal trace
Instrument parameters are not set correctly Reset the correct test parameters
The output connector of the optical fiber is dirty or
contaminated
Clean the OTDR connector port.
OTDR laser output connector or port is damaged Utilize video scope to view or return to FIS.
The optical output connector does not match Replace with matching fiber connector port
Test trace spike is big,
Unsmoothness of waveform The output interface is not properly connected Reconnect the appropriate output interface
Use a smaller pulse width Switch to a larger pulse width
Saturation (flat top) appears at the
front of the test trace
Pulse width setting is too large Use a smaller pulse width
At the beginning of the test trace,
the reflection peak drops slowly
and the tail drags
The output end of the optical fiber is contaminated Clean the connector’s interface
OTDR light output connector damaged Replace the output connector
The optical output connector does not match Replace with matching fiber connector
The reflection peak at the end of
the fiber cannot be measured The range setting is too small Increase the test range value
pulse width setting is to small Increase the pulse width parameter
False positives in trace analysis
The threshold of poor quality event of test trace is set to
be too small Increase the test pulse width parameter and
increase the event threshold value
The measured fiber length is not
accurate Instrument parameters are not set correctly Reset the appropriate parameters
Optical fiber refractive index setting is not accurate Reset the refractive index of the fiber
The measured fiber average loss
value is not accurate The front end of the test trace is too long Clean the connector’s interface
The cursor position is not set properly Reset the cursor position