EXFO IQS-1500 Power Meters for IQS-500/600 - Manual (Page 104)

Troubleshooting
96 IQS-1100/IQS-1500
Solving Common Problems
Questionable
readings displayed.
The detector or
optical connectors
are dirty.
Clean the detector and all
optical connections.
The wavelength
selection is
improper.
Switch to the correct
wavelength on all instruments
being used.
The offset nulling is
incorrect.
Perform an offset nulling with
protective cap installed.
The optical source is
unstable.
Wait for source to stabilize (at
least 60 minutes).
The correction factor
is incorrect.
Reset the correction factor to
0.000 dB or 1.000 W/W.
Problem Probable Cause Recommended Action