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UPM100 User Guide
Absolute Measurements
The UPM100 can be used to view the Absolute Power of a ber by rst ensuring the correct wavelength is selected, and
that the unit is in dBm, then plugging the ber into the power meter. The absolute power will be displayed in dBm in the
connected software as well as any tone detected.
Caution: Invisible LED/Laser Radiation
Please note that wavelengths used by optical laser sources are not visible to the human eye. Do not look directly into any
ber connector that may be live or any companion light source.
Since the light is invisible to the eye, the eye’s natural blink reex is suppressed. This can cause damage to the retina.
Setting Reference
Basic Testing
To set a reference rst connect the UPM100 and companion light source as shown below. Ensure the unit is in dBm and
you are reading the correct output power for the laser/LED you are using (Ripley Lasers are calibrated at -5 (or -8 with
tone on) and LEDs are calibrated at -22 (or 25 with tone on)). Next connect the UPM100 to a either a windows pc or
android device and go to the “OPM” tab/page. once the UPM100 is detected and you can see the live value from the
device press the “Set Reference” button while in dbm mode.
Relative/ Loss Measurements
The UPM100 can also be used to view relative power, or loss across a ber. To do this you have to rst set a reference as
described above and put the unit into dB mode. Next attach the ber you want to measure inbetwean the test jumper,
and UPM100 as shown below. This will show the relative loss in dB on the connected software.
Test Jumper
Mate Connectors Signal Propagates Down
the Fiber
Relative Loss is
Measured by the device