Fluke Versiv Series - About the Reference for Fiber Tests; When to Set the Reference

Chapter 9: Certify Fiber Cabling
Requirements for Reliable Fiber Test Results
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About the Reference for Fiber Tests
The reference procedure for fiber cable sets a baseline power
level for loss measurements. If the power level that enters the
fiber from the source changes, the reference and your loss
measurements will be incorrect. The power level can change, for
example, when the temperature at the job site increases or
decreases or when you disconnect then reconnect a test reference
cord at the tester’s output port. So, it is important to set the
reference frequently.
When to Set the Reference
Note
At the job site, turn on the testers and let them sit
for a minimum of 5 minutes before you set the
reference. Let them sit longer if they are above or
below ambient temperature.
The tester requires you to set the reference at these times:
 When you change the CertiFiber Pro module in the main or
remote tester.
 When you use a different remote tester.
 When you change the Reference Method in the test setup.
Set the reference also at these times:
 At the start of each day, at the job site, then at regular
intervals during the day. For example, set the reference when
you start tests on a different series of fibers.
 When you connect a test reference cord to the module’s
output port or to another source, even if you connect the
same test reference cord you connected before.
 When the tester tells you that the reference is out of date.